the first preferred embodiment of our invention is shown generally in fig1 as a radio , high frequency transmitter 44 , which in all cases of this invention are located below the base 35 securely attached to a commonly available curbside / roadside , front yard mailbox , generally the rural type approved by the u . s . post master general . the mailbox illustrated generally as 29 , includes a generally rectangular base 35 , having connected to it a curved side and top section of a container 36 . the sides of the container 36 extend downwardly beyond the base 35 , in order to define a rectangular recessed area 28 . this is generally designed into the base of the mailbox by the manufacturer to strengthen the base 35 . one end of the mailbox is usually enclosed while the other end generally defines an entryway 37 , into the cavity that volume between the base 35 , and the container 36 . the movable door , illustrated generally an 38 , is movable coupled over the entryway of the mailbox 29 , in order to provide an environmental seal and maximum protection against dust , freezing rain , sleet or snow and freezing weather and other foreign material from the inside of the container . the door 38 , is fastened on both sides coupled by a pair of holes 42 , located below the base 35 , in that section of the side of the container which extends downwardly beyond the base and coupled with a small , short shaft that accommodates the low friction , operating , pivotable hinge 34 . since the door hinge 34 , pivot is located below the base , the door 38 , folds down towards the front and the lower section of the mailbox 29 . the bottom section of the door generally shown as door 38 in shown in greater detail in fig8 door 38a , fig9 door 38b , fig1 door 38c and fig1 38d which we found to be most represented by the most popular u . s . post master general approved rural type mailboxes . a bottom section of these popular door shapes extend below the horizontal level of the pivotable hinge 34 , and defines a tongue or cantilevered section shown in section details in fig8 fig9 fig1 and fig1 . the tongue section of these doors moves in a rearward direction as these popular doors are opened for inserting mail in the cavity . a latch 27 , secured to the top of the mailbox door 38 , resistively couples with a mating latch 26 , attached to the top of the container 36 . many of the modern fully plastic molded mailboxes have molded , restrictive , projection posts that add restriction between the door and the container and no external latches are required to keep the mailbox door closed . it is to be noted that the most commonly available curbside / roadside mailbox doors include in some form or other , the tongue sections shown in fig8 fig9 fig1 , and fig1 , and the recessed rectangular 28 , below the base 35 , it will therefore be obvious to one skilled in this art that various forms of similarly constructed mailboxes may also be adapted to receive the mail box transmitter mounting and operating components , as generally shown in fig8 fig9 fig1 , and fig1 . fig1 shows the radio high frequency transmitter 44 which is in its own case consisting of a high frequency electronic transmitting circuit , a pushbutton switch and a battery , this assembly has been certified by the f . c . c . and when used without any modification can be mounted as shown without the necessity of re - testing and re - certification by the f . c . c . this permits the user to use &# 34 ; off the shelf &# 34 ; readily available , low cost transmitters that are used in the garage door opening industry . this assembly is shown in fig1 and inserted in another enclosure 31a which is secured to the bottom of the mailbox base 35 . generally this is done by using screws or wire ties . wire ties are used in the electrical wiring industry for securing wires and can be used here equally successfully . the enclosure 31a is located in close proximity to the tongue section of the door 38 . a cutout in the face of the enclosure facing the door 38 is located to suit the location of the pushbutton located on adjoining face of the transmitter case . a generally shaped transmitter operating vee spring 30a is shown , in close proximity to the enclosure 31a . when the tongue section of the door pushes against the vee spring 30a it forces the vertical surface of the vee spring to move toward the transmitter 44 , pushbutton 32 and upon &# 34 ; contact make &# 34 ; of the transmitter pushbutton switch 32 . the transmitter sends out a high frequency coded signal to the receiver 84 ( fig2 ) located in the residence or business place . it is to be noted that there are many different forms and designs of enclosures 31a that can be used with our novel , low cost vee spring application . to demonstrate a few designs in order to facilitate the use of our invented vee spring 30a , c , d , e , f , the following fig2 fig3 fig4 . fig5 fig6 and fig7 are presented . it will become obvious to one skilled in this art that various other forms of similarly constructed enclosures could be designed to facilitate application of our vee spring . it is especially important to note that all enclosures 31a , 31b , 31c , and all fabricated components used for enclosures must be , and are , made from non electrical conducting material . any electrical conducting material in the path of the high frequency coded , magnetically transmitted signal will appreciably attenuate the transmitted coded radio frequency signal . the transmitter used in this invention is of the garage door opener type . it consists of a electronic high frequency transmitting circuit usually a tuned inductor , capacitor , parallel circuit a pushbutton switch and a 12 volt d . c . battery . these three main components are placed in a plastic case . no external antenna is required . in the garage door opening industry the transmitter plus the case is called the transmitter 44 , and the pushbutton switch is referred to as the pushbutton 32 . in our , invention this transmitter ( case ) 44 , is held in restraint under the mail box base 35 with either a pre molded or fabricated enclosure or fabricated clamping and tieing components . fig2 is a view of the under side of a mailbox 29 , the enclosure 31b is a plastic , non conducting , material molded in the general shape as shown . the enclosure 31b , is pre molded to fit over the transmitter 44 . wing screws 43 are used to secure the enclosure 31b to the base 35 . a cutout 41 , is molded into the face of the enclosure 41 that faces the door 38 to provide operating moans for the transmitter 44 , pushbutton 32 . circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 , base 35 , or the circles 40 can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during a epoxy glueing operation . fig3 is a view of the under side of a mailbox 29 , the enclosure 31c is a plastic , non conducting , material molded in the general shape as shown . the enclosure 31c , is pre molded to the underside of the base 35 , with a cavity to fit the transmitter case . a cutout 41 , is molded into the face of the enclosure 31c , that faces the door 38 to provide operating means for the transmitter pushbutton 32 . circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 , base 35 , or the circles 40 can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during a epoxy glueing operation . the enclosure 31c has dimples 45 , molded into the and of enclosure 31c . these dimples 45 , snap into the holes 47 , on the end of the u shaped cover 46 , when the cover is placed over the enclosure 31c , and secure the transmitter 44 . to the base 25 . fig4 in a view of the under side of a mailbox 29 . a fabricated enclosure for securing the transmitter 44 , to the base 35 consists of 4 fabricated parts . a plastic angle 53 , is secured to the base 35 , with epoxy glue . a plastic angle 51 , is secured to the base with epoxy glue . a cutout 41 , is located in the angle 51 , facing the door 38 , to provide operating means for the transmitter pushbutton 32 . circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 , base 35 or the circles 40 , can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during a epoxy glueing operation . the z shaped &# 34 ; hold down clips &# 34 ; 52 , have resilient properties so that the transmitter 44 , can be inserted by spreading out the z clip 52 , until the transmitter 44 , can be snaped in to place . the z clips 52 , are secured to the base 35 , of the mailbox 29 , with screws or epoxy glue . fig5 is a view of the under side of a mailbox 29 , this method for securing the transmitter 44 , is for the person with minimum experience with tools or fabricating techniques . four ( 4 ) holes 58 , are located in the base 35 . a thin mylar , resilient , weatherproof tape 56 , is wrapped around the transmitter 44 , covering the transmitter pushbutton 32 , thus weatherproofing the transmitter 44 . the transmitter 44 , is secured t the base 35 , with mylar wire ties 57 . these mylar wire ties 57 , are strong circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 , base 35 or the circles 40 , can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during epoxy glueing operation . fig6 is a view of the under side of a mailbox 29 . a re - inforcing structural member 62 , is shown molded to the base 35 , and the sides 6 . this is common in several modern u . s . post master general approved , plastic molded mailboxes . this gives considerable strength to the under side of the mail box and this structural member 62 , is an ideal member to use for attaching the transmitter 44 . a cutout 41 , is located in the member 62 , facing the door 38 , to provide operating means for the transmitter 44 , pushbutton 32 . circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 base 35 or the circles 40 , can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during a epoxy glueing operation . the transmitter 44 , is positioned behind the member 62 , and held in place with z plate 64 , and wing screws 61 , and nuts 63 . the wing screws are located in close proximity to the transmitter to prevent lateral movement . this is a very easy to build , low cost assembly . fig7 is a view of the under side of a mailbox 29 . a reinforcing structural member 62 , is shown molded to the base 35 , and the sides 60 . this is common in several modern u . s . post master general approved , plastic molded mailboxes . this given considerable strength to the under side of the mail box and this structural member 62 , is an ideal member to use for attaching the transmitter 44 . a cutout 41 , is located in the member 62 , faceing the door 38 , to provide operating means for the transmitter 44 , pushbutton 32 . circles 40 , can be drilled holes to fasten a vee spring 30a , c , d , e , f , to the mailbox 29 , base 35 or the circles 40 , can be small molded projecting dimples for locating and securing a vee spring 30a , c , d , e , f , during a epoxy glueing operation . the transmitter 44 , is positioned behind the member 62 , and held in place with the &# 34 ; two ( 2 ) side open cavity &# 34 ; 66 . wing screws 65 , and nuts 67 , are used to hold this assembly together . this is a also a very low cost assembly , and easy to build . a very unique , novel embodiment of our invention is the vee spring . it is to be noted that there are many different forms and designs of our vee springs presented as shown in fig1 , fig1 , fig1 , fig1 , fig1 , fig1 , fig1 , fig1 , fig3 , fig4 , fig4 , fig4 , fig4 , fig4 , and fig4 . it will become obvious to one skilled in this art that various other forms of similarity constructed vee springs could be designed to facilitate application in our mail signaling invention , which we trust will not deteriate the spirit of our novel invention . these novel , invented vee springs fig . ( 12 - 19 inc ., 39 - 45 inc .) have major similar characteristics . the major , similar characteristics are as follows : 1 -- a mounting surface 3os1 , which can be in the same plain as the vertical surface 3os2 , or generally at 90 degrees to the vertical surface 3os2 . 2 -- a vertical surface 3os2 , which is the main conveyance for transfering a horizontal force to the transmitter 44 , pushbutton 32 . 3 -- a nose surface 3os3 , for making contact with the bottom tongue section of the door 38 . 4 -- a general surface 3os2 , connected to the general nose surface 3os3 , both shown in fig1 , which form a general wide angle vee ( v ) shape with the vertex 59 , of this angle , pointing generally in the direction of the transmitter 44 , which has its pushbutton facing the vertex 59 . 5 -- a nose surface 3os3 , which is that part of the vee spring that generally makes contact with the door tongue during a door operation . 6 -- a nose surface 3os3 , that makes contact with the tongue of a door 38 immediately with minimum movement of the door , in a door opening operation . when this contact accurs in the door opening operation it transfers a force action to the pushbutton 32 , of the transmitter 44 , and causes a radio frequency coded signal to be sent out by the high frequency magnetic wave of the transmitter 44 . a receiver 84 , located in the residence or business is tuned to this same coded magnetic wave and it also initiates a control signal to the mail arrival electronic , control circuit fig3 . this receiver 84 , can be located several hundred feet from the transmitter 44 . it is important that the transmitter 44 pushbutton be engaged as soon as the door begins to move be cause in our research we discovered that the mail delivery person doesn &# 39 ; t open the door far when delivering only one piece of mail . these vee springs may generally be made of medium temper , spring steel or similar steel with good resilient proportion . however we found in our research that standard cold roll steel , 23 gauge thick and 5 / 8 inch wide worked very well with our invention because of the close matching of the geometry of the tongue surface , the bottom surface of the door 38 , and the geometry of the vee spring surface 3os3 . if spring steel is used for manufacturing the vee springs , a lighter gauge spring steel could be used . the tongue surface of a plastic molded mailbox door 38 , experienced very minor wear during life testing with steel vee springs . the vee spring would work , equally well , if made from a resilient plastic of heavier gauge . in our research we found that 1 / 16 &# 34 ; thick molded plastic 1 1 / 2 &# 34 ; wide had excellent resiliency . the thicker material is shown in fig . ( 8 - 11 inc .) fig . ( 20 - 24 inc .) and fig , ( 33 - 35 inc .). fig . ( 12 - 19 inc .) are a group of different shaped vee springs . they may be made from thin metal strips , generally 5 / 8 &# 34 ; in width . the geometry of the shapes are easily formed in a high production setting with low cost stamping dies . the wide open vee ( v ) shape is formed by the intersecting surfaces 3os2 and 3os3 . the vertex 59 , is a generally defined geometric characteristic . in some cases the vertex 59 , could have a generally curved vertex and we trust that will not affect the spirit of our invention . surface 3os1 is the surface used for mounting the vee spring to the under side of the mailbox . the surface 3os1 is generally perpendicular to the vertical surface 3os2 but also for some applications mounting surface 3os1 , may be in the same plain as vertical surface 3os2 . all the vee spring designs shown are easy to manufacture and are low in price . these vee springs can also be easily formed with a standard pair of pliers . in our testing program , we made a few using this method and they worked great . a &# 34 ; do it your self home owner &# 34 ; with minimum mechanical experience can make a vee spring using this method . even after the home made vee spring is mounted underneath the mailbox 29 , it can be &# 34 ; finish adjusted &# 34 ; to perform the correct motion when the mailbox door 29 , is operated . fig8 is a cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; 30a when used with a straight , bottom section mail box 29 , door 38a . when the door is operated , the vee spring 30a surface 3os3 , moves rear - ward placing a horizontal force on eyelet 80 . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and the transmitter sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30a , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilevered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton , to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig9 in a cross section &# 34 ; x -- x &# 34 ; of fig1 this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; 30a when used with 90 degree , flanged , bottom section of a mailbox 29 , door 38b , when door is operated , the vee spring 30a surface 3os3 moves rear - ward placing a horizontal force on pin 81 . the pin 81 , moves in the close fitting hole in support member 62 . the pin 81 , then forces pushbutton 32 , to operate and the transmitter sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30a , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig1 is a cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; 30a when used with a quarter round bottom section of a mailbox 29 , door 38c , when the door is operated , the vee spring 30a surface 3os3 moves rear - ward placing horizontal force on eyelet 80 . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and transmitter 44 , sends out its high frequency coded signal to the receiver the close fitting hole is an effective bearing surface . the vee spring 30a , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilivered section of mail box door ) during door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties it recovers its original form after the mail box door 38 , is closed . fig1 is a cross section &# 34 ; x -- x &# 34 ; of fig1 this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; 30a when used wit a reverse , half round bottom section of a mailbox 29 , door 38d . when door is operated , the vee spring 30a surface 3os3 moves rearward placing horizontal force on eyelet 80 . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and transmitter 44 , sends out a high frequency coded signal to the receiver the close fitting hole is an effective bearing surface . the vee spring 30a , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilevered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a straight , bottom section mail box 29 , door 38a , the vee spring is changed to fig1 ( vee spring 30d ). when the door is operated , the vee spring 30d surface 3os3 , moves rear - ward placing a horizontal force on pushbutton 32 . the transmitter 44 , sends out a high frequency coded signal to the receiver . the cutout in member 62 , is made large enough to facilitate free movement for the weld stud 71 , the vee spring 30d , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilevered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties it recovers its original form after the mail box door 38 , is closed , fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a 90 degree , flanged , bottom section of a mailbox 29 , door 38b . the vee spring is changed to fig1 ( vee spring 30g ) when the door is operated , the vee spring 30g surface 3os3 moves rear - ward placing horizontal force on pin 81 . the pin 81 , moves in the close fitting hole in support member 62 . the pin 81 , then forces pushbutton 32 , to operate and the transmitter sends out a high frequency coded signal to the receiver the close fitting hole is an effective bearing surface . the vee spring 30g , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilivered section of mail box door ) during door opening operation by the mail delivery person , the vee spring moves , rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; 30a when used with a quarter round bottom section of a mailbox 29 , door 38c , the base 35a , has a molded seat for securing vee spring fig1 ( 30a ). when the door is operated , the vee spring 30a surface 3os3 moves rearward placing a horizontal force on eyelet bo . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate an transmitter 44 , sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30a , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35a , with plastic z plate 64 . the vee spring 30a is secured in the molded slot in the base 35a with epoxy glue . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a reverse , half round bottom section of a mailbox 29 , door 38d . the base is changed to base 35b and the vee spring is changed to fig1 ( vee spring 30h ) the base 35b has a molded dimple 78 , for securing vee spring 30h . the vee spring 3oh , in secured to base 35b , with epoxy glue . when door 38d is operated , the vee spring 30h surface 3os3 moves rear - ward placing horizontal force on eyelet 80 . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and transmitter 44 , sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30h , is located on the longitudinal center , line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35b , with plastic z plate 64 . when the nose surface 3os3 of the vee spring in contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a straight , bottom section mail box 29 , door 38a , the vee . spring is changed to fig1 ( vee spring 30c ). when the door is operated , the vee spring 30c , surface 3os3 , moves rear - ward placing a horizontal force on pushbutton 32 . the transmitter 44 , sends out a high frequency coded signal to the receiver . the cutout in member 62 , is made large enough to facilitate free movement for the tubular projection of the vee spring 30c . the vee spring 30c , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . when the nose surface 3os3 of the vee spring in contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating zee spring when used with a 90 degree , flanged , bottom section of a mailbox 29 , door 38b . the vee spring is changed to fig1 ( vee spring 30f ). when the door is operated , the vee spring 30f surface 3os3 moves rear - ward placing a horizontal force on pin 81 . the pin 81 , moves in the close fitting hole in support member 62 . the pin 81 , then forces pushbutton 32 , to operate and the transmitter sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30f , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35 , with plastic z plate 64 . the &# 34 ; half circle &# 34 ; tip on the tongue surface 3os3 of vee spring 30f , may be used to expedite a faster transmitter 44 , push button 32 , operation with very small initial movement of the door 38b . when the nose surface 3os3 of the vee spring in contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 in a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a quarter round bottom section of a mailbox 29 , door 38c , the base 35a , has a molded slot for securing vee spring fig1 ( 30e ). when the door is operated , the vee spring 30e surface 3os3 moves rear - ward placing a horizontal force on eyelet bo . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and transmitter 44 , sends out a high frequency coded signal to the receiver . the close fitting hole is an effective bearing surface . the vee spring 30e , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35a , with plastic z plate 64 . the vee spring 30e is secured in the molded slot in the base 35a with epoxy glue . when the nose surface 3os3 of the vee spring in contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . fig2 is a modified cross section &# 34 ; x -- x &# 34 ; of fig1 . this section shows the application of the &# 34 ; transmitter operating vee spring &# 34 ; when used with a reverse , half round bottom section of a mailbox 29 , door 38d . the base is changed to base 35b and the vee spring is changed to fig1 vee spring 30b ) the base 35b has a molded dimple 78 , for securing vee spring 30b . the vee spring 30b , is secured to base 35b , with epoxy glue . when door 38d is operated , the vee spring 30b surface 3os3 moves rear - ward placing horizontal force on eyelet 80 . the eyelet moves in the close fitting hole in support member 62 . the eyelet then forces pushbutton 32 , to operate and transmitter 44 , sends out a high frequency coded signal to the receiver . the close fitting hole in an effective bearing surface . the vee spring 30b , is located on the longitudinal center line of mailbox 29 . the transmitter 44 , is secured to the bottom of the mailbox base 35b , with plastic z plate 64 . when the nose surface 3os3 of the vee spring is contacted by the tongue surface ( bottom cantilivered section of mail box door ) during a door opening operation by the mail delivery person , the vee spring moves rearward . the nose surface 3os3 , moves rearward and also the generally formed vertical surface 3os2 , also moves rearward causing the transmitter 44 , pushbutton to ,- operate and send out a coded radio high frequency magnetic wave to the receiver 84 . in this operation the vee spring is slightly distorted but because of its resilient properties , it recovers its original form after the mail box door 38 , is closed . the following six ( 6 ) figures are larger sections showing in greater detail , the different methods used to mount the vee springs . they are fig3 , fig3 , fig3 , fig3 , fig3 , and fig3 . these sections are broadside views of the vee springs mounted underneath the mail box 29 , base 35 . the vee springs are located on the longitudinal center line of the mail box 29 . the vee springs in fig . ( 33 - 35 inc .) are shown in thicker sections simulating plastic construction . the thinner sections shown in fig . ( 36 - 38 inc .) simulate vee springs made of metal . plastic or metal vee springs can be inter changed in these figures without deteriating from the spirit of this invention . fig3 , shows the vee spring 30a mounted to the bottom of base 35 using screw 15 , and nut 19 . the eyelet 80 , moves freely in the close fitting hole 18 . fig3 , shows the vee spring 30a cemented to the molded base 35a , pocket 79 . the pocket 79 , also can be molded to smaller dimensions for &# 34 ; force fitting &# 34 ; the vee spring 30a to the molded base 35a , pocket 79 . fig3 , shows the vee spring 30h cemented to the molded base 35b , dimple 78 . the dimple 78 , also can be molded to smaller dimensions for &# 34 ; force fitting &# 34 ; the vee spring 30h to the molded base 35b , dimple 78 . fig3 shown a vee spring 30g , either cemented or force fitted in a generally small slot 17 in front plate 20 . the front plate has a close fitting , hole for the eyelet to have low friction rearward movement when contacted by the vee spring 30g . the transmitter 44 , is secured between the end plate 20 , and z member 64 using two screws 14 , and two nuts 13 . the pushbutton 32 , is operated by the rearward movement of the vee spring 30g at first , door opening movement of the mail box 29 door 38 . this assembly of vee spring 30g , front plate 20 , eyelet 80 and z member 64 is significant because they form a miniature total assembly that can be used on customer &# 39 ; s existing mailbox . all that would be required to mount this assembly to the bottom of a rural type mailbox 29 would be to drill two holes in bottom of mail box thru the base 35 , and secure with two screws 15 . fig3 is the same as fig3 except vee spring 30h is now used and secured to front plate 20 with screw 16 , and nut 19 . fig3 is the same as fig3 except vee spring 30a is now used and the front plate is now a plastic angle 21 . screw 15 , secures vee spring 30a to angle 21 with threaded hole in angle 21 . it is to be noted that screws 15 are secured to top of plates 20 and 21 with threaded holes in these members 20 , and 21 , to assist the analysis of these sections pertaining depth the following is given . the vee springs are generally 5 / 81 &# 39 ; wide and 23 gauge thick if their composition is metal and generally 11 / 2 &# 34 ; wide and 1 / 16 &# 34 ; thick if their composition is plastic . front plates 20 , and 21 are generally 3 &# 34 ; long . the screws 14 , are spaced apart an amount necessary to prevent lateral movement of transmitter 44 . however it is significant to note that the vee springs can be made from circular spring wire at a very low piece cost and also at very low tooling cost . these types of vee springs are shown in fig . ( 39 - 45 inc .). these vee springs can be used in identical applications as previously shown in this disclosure . these vee springs have a novel parallel section 30s1 for mounting means . fig3 is the schematic diagram of the electronic signaling devices . it consists of the following major circuit elements and devices . a -- control transformer ti , for supplying power to the radio receiver terminals in and 3 . the transformer t1 also supplies power to the diode d2 which then driven the 12 volt regulator lm340 . b -- regulator lm340 maintains the output voltage to the electronic circuits at a constant voltage of 12 volts d . c .. c -- radio receiver 84 , of the garage door operating type which is tuned to the same frequency as the transmitter 44 which is located underside the mailbox 29 base 35 . the output signal from the receiver comes from terminal 2 and 3 . the signal can be either a contact closure or a triac device . power to the receiver is to terminals 1 and 3 . the radio receiver 84 , is bolt to the top of control cabinet 96 , and located in the residence or business place ( see fig2 and 29 ). e -- scr q2 is &# 34 ; the memory hold &# 34 ; semiconductor . it stays on after the radio receiver 84 receives the mail arrival signal from the transmitter 44 , and can only be turned off by pushing pushbutton 94 which is designated on the schematic diagram as reset switch sw2 . f -- pushbutton switch 94 , labeled sw2 , on the schematic fig3 for resetting the mail arrival signal and preparing for the next mail arrival . it is a normally closed contact . g -- diode d2 rectifies the a . c . voltage by half wave rectificatin for driving the 12 volt d . c . regulator . h -- a 556 integrated circuit semiconductor consists of two major circuits . one is labeled ula and the other ulb . i -- ula is a triggered time delay circuit the time delay is determined by potentiometer r4 , resistor r5 and capacitor c2 . the input signal pin 8 , is labeled trig . the output signal pin 9 , is labeled out . this output mail arrival signal energizes : 1 -- the &# 34 ; receiver locator signal light &# 34 ; 90 , labeled led d3 on the schematic diagram fig3 . 2 -- the buzzer 91 , labeled bz1 on tho schematic diagram fig3 . 3 -- the vibrator relay 92 , labeled k1 on the schematic diagram fig3 j -- q4 is a semiconductor switch that anables the buzzer bz1 and vibrator relay k1 -- to pulsate during the time delay of ula . k -- ulb is an oscillating circuit that triggers ula to the on state and also causes the &# 34 ; mail arrival light &# 34 ; 93 , labeled led di on the schematic diagram fig3 to blink when mail has been delivered . it is reset with pushbutton 94 , labeled reset sw2 on the schematic diagram fig3 , 1 -- memory check pushbutton 89 , labeled swi on the schematic diagram fig3 is a single pole double through ( spdt ) switch used to check if mail has been delivered and if the visual or hearing impaired person missed the first signal due to being absent from the home or business place when mail was delivered . m -- time delay potentiometer 82 , labeled r4 on schematic diagram fig3 this potentiometer 82 , is used to vary the time delay circuit of ula generally from 3 to 180 seconds . fig3 shows various other resistors r1 ; r2 ; r3 ; r6 ; r7 ; r9 ; r11 ; r12 ; r13 ; r14 ; and r15 and capacitors c1 ; c3 ; c4 ; c5 ; and c6 that the electronic signaling device incorporates . fig2 shows the radio frequency receiver 84 , mounted on the mail arrival signaling control cabinet 96 , per fig2 . fig3 shows a garage door opener transmitter which is called a key chain type in the industry which also is used in our invention for signaling the arrival of mail in a rural type mail box . fig3 shows a standard garage door opener transmitter 44 , which is used in our invention for signaling the arrival of mail in a rural type mail box . the operation and functions performed by our novel mail signaling device 44 is detailed as follows : when mail is delivered to a rural mail box 29 , the transmitter either a standard type 44 , or a key chain type 97 located underneath the base 35 , sends out a high frequency coded signal to the radio frequency receiver 84 , located in the residence or business place . 1 -- mail box opened for mail delivery . as soon as door moves , the transmitter operates and sends out it &# 39 ; s high frequency coded signal as long as the mail box is open . the door is closed after mail delivery . 2 -- mail arrival light 93 . blinks and will remain blinking until reset with pushbutton 94 . 3 -- receiver &# 34 ; location signal light 89 , turns on and remains on for generally 3 to 180 seconds depending on setting of potentiometer 82 or longer if transmitter 44 , stay on because door of mailbox was left open . 4 -- buzzer 91 sends out a pulsating audible sound signal and remains on for generally 3 to 180 seconds depending on setting of potentiometer 82 . 5 -- vibrator 92 sends out a mechanical , vibration signal which can be sensed by a person with both hearing and visual impairment . this signal will last generally for 3 to 180 seconds depending on the setting of potentiometer 82 . the vibration signal can be sensed with a finger held on the top of the vibrator 92 . 6 -- if the person with visual or hearing impairment or with both visual and hearing impairment missed the first mail delivery signal , which lasted generally 3 to 180 seconds they can recheck if mail was delivered by pressing pushbutton 89 . this is possible because of the - novel memory hold circuit of our electronic circuit . this memory hold circuit in due to the scr q2 , fig3 , remaining on after the mail is delivered . this signal can be checked as manny times or as long an the pushbutton 89 is held pressed . the memory check pushbutton 89 and the vibrator 92 are located next to each other oh top of cabinet 96 , so that two adjacent fingers can easily press the pushbutton 89 and sense the vibration signal at the same time . novel technique for precision locating the radio receiver in the residence or business place for maximum signal reception . the energy radiated from the transmitter 44 , or 97 , located underneath the mail box base 35 , is devided into a ground wave traveling in a straight line along the surface of the earth and a sky wave which is propagated in the atmosphere above the earth and because of the high frequency affects this part of the wave is lost when it hits the above atmosphere . the ground wave is the one that concerns us . one half of this ground wave energy is contained in the form of electrostatic energy and the other is in the form of magnetic energy . the ground wave starts from the rural type mail box 29 , and travels horizontal in straight lines but as it travels away from the mail box , it becomes weaker as a result of spreading and losses resulted from the fact that the ground induces charges in the earth . these induced charges develop ground current and loses that attenuate the ground wave with distance at a rate determined by the distance the ground wave has to travel to reach the radio receiver 84 , antenna 83 , the frequency and the reactive characteristics of the earth material at the wave frequency . it is good practice therefore to place the radio frequency receiver as high as possible in the residence or business place and also out of the path of magnetic or conducting material hidden inside walls and other conducting material located in the residence or business place . when the ground wave reaches the receiver antenna 83 , energy is produced in the receiver antenna 83 because the electromagnetic flux of the radio frequency ground wave cuts across the receiver antenna 83 . this voltage induced in the receiver antenna 83 , is equal to the product of the effective antenna height and the strength of the transmitted wave and the resulting current flowing in the receiver antenna 83 . since the ground wave is magnetic and travels in a straight line between the transmitter 44 , and the radio frequency receiver 84 , antenna , 83 it is extremely important that no metal or other conducting material is in this straight line path . any conducting material especially material with magnetic properties should be avoided . our novel invention solves this problem . the &# 34 ; receiver locator signal light &# 34 ; 90 can be used to locate the receiver 44 with its antenna 83 at an optimum location in the residence or business place . during testing of our - mail delivery signaling system , we discovered that our test results were inconsistent . some days the mail delivery signal would work fine but other days we would miss the mail delivery signal . it was discovered that the location of the receiver 44 with its antenna in the residence or business place was critical . our invention of the of receiver locator signal light solved this problem . here is how it works : novel technique for precision locating the radio receiver in the residence or business place for maximum signal reception . step 1 : open the mail box door and let it open so the transmitter sends out a continuous high frequency wave . set potentiometer 82 for minimum time delay for maximum sensitivity in locating the receiver 84 . step 2 : move the receiver 84 located in the residence or business to a location where the &# 34 ; receiver locator signal light &# 34 ; 90 remains on continuous without flickering . if there is any intermittent flickering of this light 90 , move the receiver 84 , to another location until the best location is found . the location should be marked . we found that one foot lateral movement from the optimum test location gave us intermittent results . step 3 : close the door of the mail box 29 and the mail signaling system is ready for mail delivery , step 1 : open the mail box door and let it open so the transmitter sends out a continuous high frequency wave . step 2 : the buzzer 91 , can also be used as a &# 34 ; receiver locator signal .&# 34 ;-- for the person with a visual impairment . move the receiver 84 , located in the residence or business to a location where the buzzer 91 , continuously sends out a buzzer audible signal . if there is any irregular intermittent sound emitted from the buzzer 91 , move the receiver 84 to another location until the best location is found . the location should be marked . we found that one foot lateral movement from the optimum test location gave us intermittent results . step 3 : close the door of the mail box 29 and the mail signaling system is ready for mail delivery . steps 1 , 2 and 3 for person with both visual and hearing impairment . step 1 : open the mail box door and let it open so the transmitter sends out a continuous high frequency wave . step 2 : the vibrator 92 , can also be used as a &# 34 ; receiver locator signal &# 34 ; for the person with both visual and hearing impairment . move the receiver 84 , located in the residence or business to a location where the vibrator 92 , continuously sends out a vibrating signal that can be sensed by touching the top surface of vibrator 92 . if there is any irregular , intermittent vibration sensed from the top surface of vibrator 92 , move the receiver 84 , to another location until the best location is found . the location should be marked . we found that one foot lateral movement from the optimum test location gave us intermittent results . step 3 : close the door of the mail box 29 and the mail signaling system in ready for mail delivery . this novel &# 34 ; receiver locating technique &# 34 ; in very important for guaranteeing that a mail arrival system will operate constantly with out missing a mail delivery signal . this is especially important where the distance between the rural mailbox and the receiver is great in the range of 100 to 300 feet and where the transmitted wave has to go thru several walls of the residence or business place . there can be magnetic conducting material inside walls that can be very detrimental to high frequency transmitted waves . also conducting material in room of resident or machinery located in a business can be detrimental to the transmitted wave if they are located in the wave &# 39 ; s path . our novel technique solves this problem .
a system for remotely sensing the delivery of mail to a mailbox uses a transmitter mounted on the mailbox . the transmitter generates a prescribed signal when the door of the mailbox is opened . the system also uses a receiver adapted for placement at a location remote from the transmitter . the receiver has two receiving circuits . the first receiver circuit generates a mail arrival output in response to receipt of the prescribed signal from the transmitter . the first receiver circuit maintains the generation of the mail arrival output regardless of continued receipt of the prescribed signal , until receipt of a prescribed termination command entered by the user . this way , the user knows when the mailbox door has been opened . the second receiver circuit generates a receiver locator output separate from the mail arrival output in response to receipt of the prescribed signal from the transmitter . unlike the first receiver circuit , the second receiver circuit automatically terminates the receiver locator output in the absence of receipt of the prescribed signal after a predetermined time period . the temporal receiver locator output indicates when the receiver is placed in the remote location for good reception of the prescribed signal .