referring first to fig1 the subject mailbox assembly 2 is shown to comprise a rectangular body , including a front door 4 , and longitudinal sides 6 . an outgoing mail indicator flag assembly 8 is attached to one of the sides 6 , proximate a top edge , and an incoming mail indicator flag assembly 10 is attached to the side 6 proximate a lower edge , and generally adjacent the front door 4 . as explained in greater detail below , the flag assembly 10 can attach to the opposite side of the mailbox in those applications where the visibility of the flag in assembly 10 would thereby be enhanced . pursuant to convention , the mailbox assembly 2 is mounted to a vertical post 12 , and specifically rests upon a horizontal support arm 14 extending perpendicularly from the post 12 . it will be appreciated that the purpose of the flag assemblies 8 , 10 is as follows . the flag assembly 8 is pivoted into a vertical orientation by the user whenever outgoing mail is deposited in the mailbox for pick - up . the upright flag indicates to the mailperson that mail is present for withdrawal . the flag assembly 10 is pivoted by the opening of the door 4 , and thereby , in the upright condition , indicates that a delivery of mail has occurred . referring now to fig2 and 6 , the upper flag assembly is seen to comprise a unitarily molded plug member 16 , having a gripping flange 18 in an outward facing surface , and an elongate flag arm 20 extending substantially parallel to the mailbox sidewall . the plug member 16 has a neck portion which projects through an appropriately sized aperture 23 in the mailbox sidewall 6 , and separated resilient tines 24 at an inward end . the tines 24 are provided with outward projecting lugs 25 , which engage over an inward surface of the mailbox defining the aperture 23 . so assembled , plug member 16 rotates and repositions the flag arm 20 from a horizontal , down position , to a vertical , up , position shown in fig2 . the plug member 16 is received into a well defined by a serpentine socket flange 26 , integrally molded with the mailbox sidewall 6 . the socket flange comprises a horizontal , rearwardly disposed , ledge portion 28 , and a vertical , forwardly disposed , portion 30 . it will readily be appreciated that the flag arm 20 rests upon the ledge portion 28 in the down condition , and rotates upward into a vertical orientation to indicate to the deliveryman , the presence of mail in the box . the incoming mail indicator flag assembly 10 , as illustrated in fig2 , and 8 , includes a flag component 32 , comprising a housing body 34 , and a flag arm 36 . the housing body 34 is generally circular at the base end , and has a cylindrical internal cavity 38 formed therein , opening toward the mailbox side 6 . a tab projection 40 extends outwardly from the body 34 toward and forward of the mailbox door 4 . the assembly further comprises a plug member 42 , having a circular head portion 44 , an intermediate shank portion 46 , and two spaced apart tines 48 at a remote end . as shown , the plug member shank portion 46 incorporates spaced apart slots 47 extending longitudinally along one side , to facilitate molding of the part and to reduce the part &# 39 ; s material content . each of the tines 48 is formed having an outwardly projecting flange 50 at a terminal end . a spring member 52 , formed in the shape of a ring , further is included in assembly 10 . the spring member is molded of highly resilient plastics material , for example commercially available plastic sold under the name acetal by dupont corporation . the spring member 52 has a central through hole 54 , and a series of spaced - apart post projections 56 positioned about hole 54 . a series of locating protrusions 58 are positioned about the hole 54 on the underside of the spring member 52 , and project outward therefrom . a retainer member 60 is provided in the assembly 10 , of generally cylindrical shape . a cavity 64 extends into member 60 , defined by cylindrical sidewalls 62 . cavity 64 terminates at a bottom floor 66 from which a cylindrical boss 68 extends upward , centered within cavity 64 . a through bore 70 extends through the boss 68 and the member 60 on the center axis . three apertures 72 extend through the floor 66 of the cavity 64 , positioned to correspond with the locating protrusions 58 in the underside of the spring member 52 . extending down the side 62 is a slot 74 , dimensioned to accomodatively receive the tab 40 of the flag component housing body 34 . the member 60 is formed having a stepped - in lower portion 76 . as best viewed in fig1 , a lower surface 78 of member 60 is formed to provide an annular flange 80 extending around the periphery of the through - bore 70 . indexing detents 80 are formed within the annular flange at ninety degree intervals . as shown in fig2 , and 8 , the mailbox side 6 has an aperture 84 therethrough . positioned adjacent to the aperture 84 and extending vertically is an indexing rib 86 . referring to fig1 , 7 , and 8 , the mailbox is formed integrally , by conventional molding of plastics material , to have a bottom floor 88 . an inward bottom flange 90 is formed to the inside , and spaced apart from , the lower portion of the mailbox side 6 . together , the lower portion of the mailbox side and the flange 90 define a vertical slot 89 on each side of the mailbox . the flange 90 is provided with a through - aperture 91 which co - aligns with the aperture 84 in the mailbox side 6 . the mailbox door is manufactured of conventional plastics material , by injection molding . each side of the door 4 is provided with a series of stepped edges 92 and 94 at the bottom door corners . the inside of the door , as best shown by fig2 and 7 , has elongate inside flanges 93 along each side , and elongate outer door flanges 97 . flanges 93 are intended to fit between sides 6 and flanges 90 of the mailbox body and have appropriately positioned apertures in the lower end to align with apertures 84 and 91 of the mailbox body . the mailbox is intended to be sold to the end user in a partially disassembled condition . the mailbox body is unitarily molded , as is the door 4 , and flag assembly componentry , of a suitably hard plastic material such as polypropylene . the lone exception is the spring member 52 , which is molded from a plastic having high spring properties , such as acetal . the user receives the mailbox assembly with the door attached to the body , by way of two sets of components 42 , 52 , 60 . the sides of the mailbox body and door are identically formed , having the flanges and co - aligned apertures aforementioned . one flag component 32 is provided , for one side of the mailbox , and a substitute cap member 96 is provided for the other side . cap member 96 has an internal cavity 100 formed by cylindrical sidewalls 98 , terminating at a bottom floor 102 . it will be appreciated that the size and shape of the cap member 96 , and cavity 100 , substantially replicate the size and shape of the flag housing body 34 and cavity 38 , respectively . the user is to determine which side of the mailbox body to mount the flag assembly 32 , based upon the particular location of the mailbox relative to the customary position from which the user views the mailbox . by previous assembly by the manufacturer , the head portion 44 of the plug member 42 is inserted into the housing body cavity 38 , and spring member 53 is inserted into the cavity 64 of retainer member 60 , over the cylindrical boss 68 . it will be appreciated that the locating protrusions 58 of the spring member 53 underside register within the spring locating apertures 72 of the retainer member 60 . the shank portion 46 of the plug member 42 is then inserted through the apertures 54 ( of spring member 52 ), and 70 ( of retainer member 60 ), as the retainer member 60 is inserted into cavity 38 of housing body 34 . the tab 40 is thereby positioned to extend through the slot 74 of the retainer member 60 . the rim of the housing body 34 , as best shown by fig8 and 7 , snaps over the sidewall 62 of the retainer member 60 , whereby securing the assembly together . the semi - completed flag assembly 10 is then affixed to the preferred side of the mailbox body . as shown , the length of the plug member is sufficient to extend through aligned apertures of the mailbox side 6 , the door flange 93 , and the bottom floor flange 90 . when insertion is complete , the tine flanges 50 snap over the inside surface of the floor flange 90 . the spring is compressed between the plug member cap 44 and the floor 66 of the retainer member 60 , and the annular flange 80 on the underside of the retainer member 60 ( fig7 and 10 ) is pressured thereby against the mailbox side 6 . consequently , the flag assembly 10 is firmly forced against the mailbox side 6 , yet is free to pivot about a pivot axis which extends through the plug member shank portion 46 . as previously mentioned , the mailbox is preferably sold with the door pivotally attached by the two sets of assemblies of components 42 , 52 , and 60 . the user snaps the flag component 32 over the assembly on the appropriate side , and the substitute cap member 96 over the other assembly , subsequent to purchase . also , it will be appreciated that the pivot axis of the flag assembly is shared by the mailbox door 4 , which is pivotally secured to the mailbox body by the plug member tines 48 . the flag assembly 10 accordingly serves two purposes ; first , it provides an indicator flag to automatically indicate when mail has been delivered to the mailbox , and secondly , as means to pivotally attach a corner of the mailbox door to the mailbox . as shown in fig5 and 8 , the tab 40 of the flag assembly 10 is positioned forward of , and adjacent to , the corner edge 94 of the door 4 when the flag assembly is attached to the mailbox . both sides of the door 4 provide a corner edge 94 in order to afford the user the option of placing the flag assembly on either side . as illustrated in fig9 as the door is opened by the deliveryman , to deposit mail , the edge 94 catches tab 40 and initiates pivotal rotation of the housing body 34 . when the door has been fully opened , flag arm 36 will have been pivoted from a first , horizontal position , to an upright second position . as the door is then closed , the flag arm 36 remains in the upright condition so as to indicate to a remote viewer , the presence of mail . after the mail is removed , the flag arm 36 can be manually dropped back into its horizontal first position by the user . an indexing rib 86 is present on both sides of the mailbox , although only one is shown in fig8 . the rib 86 bears against the annular flange 80 and is pressured thereagainst by the operation of spring 52 , described previously . the pivotal rotation of the housing body 34 pivots the retainer member 60 integrally therewith , until the flag reaches its upright position . the indexing detents 82 of the retainer member 60 are spaced ninety degrees apart , such that the indexing rib 86 enters one of the detents 82 when the flag is in the horizontal first position and again when the flag reaches its vertical second position . the pressure exerted by spring 52 against the retainer member 60 , and in turn against the mailbox side 6 , insures a positive registration of the indexing rib 86 within the detents 82 . the subject invention is intended to be sold in the partially disassembled condition , but need not . in the preferred embodiment , the mailbox is sold in kit form , with the door attached , but components 32 and 96 in loose form . the kit is provided with two sets of pivot post assemblies ; the first being the flag assembly 10 described above , and the second being an assembly identical to the flag assembly 10 but with cap member 96 instead of the flag component 32 . alternatively , however , if so desired , two of the flag assemblies 10 may be used , one for each side of the mailbox . in the alternative case , then , two indicator flags would be simultaneously raised with the opening of the door . it will be readily understood that the cap member 96 is identical to the flag component body 34 in dimension and internal configuration , suitable to receive and assemble a second set of components 42 , 52 , and 60 , and thereafter to assemble to the mailbox side opposite to that side selected to receive the flag assembly 10 . it will be appreciated that the mailbox body , including the sidewalls , floor , and roof , are intended to be unitarily molded of conventional plastic material , in the preferred embodiment . the other components , such as the door , flag assembly and cap assembly components , can likewise be so manufactured . a suitable material for the manufacture of such components is polypropylene . the spring member 52 can be molded of suitable plastic material having a high spring property , such as acetal . the assembly of the mailbox components and their attachment subsequently to the mailbox body can be effected without the need for tools . the dual functions served by the flag assembly , i . e . as an indicator as well as pivot attachment means for the door , enhances the utility of the subject assembly by reducing its cost . the inexpensive to manufacture components likewise minimize the cost of the assembly . finally , the positive registration detent structure , under the influence of the spring member , makes the flag indicator relatively foolproof . the flag will remain in the down or up positions until pivoted intentionally out of those positions , because the registration rib of the mailbox side is spring biased into the appropriate detent slot . therefore , external influences on the flag arm , such as wind , will not move the flag from its proper position . while the above describes the preferred embodiment , the subject invention is not to be so restricted . other embodiments , which will be apparent to those skilled in the art , and which utilize the teachings herein set forth , are intended to be within the scope and spirit of the present invention .
a mailbox assembly is disclosed comprising a mailbox body having a roof , parallel sidewalls , and a front door . the assembly further includes a flag housing assembly for outgoing mail indication , attachable to one side of the mailbox body , and a second housing assembly attachable to one side of the mailbox body for incoming mail indication . the flag assembly is pivotally attachable to either of the mailbox body sidewalls , at the election and preference of the user , and comprises actuation means responsive to pivotal opening of the mailbox door , and a pivot post member for insertion through co - aligned apertures in the mailbox body and door , whereby pivotally attaching the flag housing assembly to one of the mailbox sides and pivotally attaching the door to the mailbox body . the flag assembly further includes spring means for pressuring the flag housing body against the mailbox side , and registrable flag detent and rib means for locking the flag arm into first and second positions .