in a preferred embodiment of the invention , as shown in fig1 and 2 , a pocket 13 at the back of the housing 10 forms a substantially right parallelpiped with an inwardly directed partition 20 having a first hole 22 coaxial with the central shaft 300 and pinion assembly 60 . at the back of the reel housing , is a back wall 21 with a second hole 23 which is substantially coaxial with hole 22 . the drag assembly 50 is positioned in the pocket 13 and respectfully adjacent are the concave disc spring 55 , the d - shaped washer 56 , the first frictional washer 57 , the disc drive 58 and the second washer 59 which is adjacent the partition 20 . in one embodiment , a knob 51 comprises a shank portion 501 with a proximal end 508 secured to the head 502 and a thrust bearing surface 506 on the distal end 509 that projects into the hole 23 . the shank 501 has a threaded section 503 that mates with the thread 24 in hole 23 and a passageway 504 that preferably does not extended out through the head 502 . in an alternative embodiment , the hole 23 has no threaded portion 24 but a flange nut 52 having square hexagonal flat sides 511 and a cylindrical extension 510 with a thread 527 therein is positioned in the hole 23 as shown in fig3 . in this embodiment , the housing 10 has a ridge 512 just adjacent the hole 23 that mates with one of the flats 511 of the nut 52 so that it will not rotate relative to the housing 10 . the threaded shank 501 is secured into the threads 24 or 527 until the bearing surface 506 is in contact with the disc spring 55 . until now , the drag assembly 50 parts can easily be removed from the pocket 13 ; however , when the back end 301 of the shaft 300 is slipped into the drag assembly 50 with the holes 513 , 514 , 515 , 517 and 504 , all being larger than the maximum diameter of the shaft 300 , the drag assembly 50 is confined within the pocket . since these holes are larger than the shaft 300 diameter , the shaft 300 can revolve freely . in order for the drag assembly 15 to function properly , the drag drive or disc drive 58 must be keyed to the back end 301 of the shaft 300 so that when the shaft 300 rotates , the disc drive 58 rotates . and , conversely , when the disc drive 58 is prevented from rotating , the shaft 300 cannot rotate . in one embodiment as shown in fig2 the back end 301 has opposed milled flats 302 forming a double - d shaped cross - section at the end of the shaft 300 . the disc drive 58 also has a double - d shaped hole mating with flats 302 . obviously , other types of keying means can be utilized such as only one milled flat at the end 301 and a mating d - shaped hole in the drive 58 . when the bearing surface 506 is just contacting the disc spring 55 , there is almost no compressive force pushing the d - shaped washer 56 , the first frictional washer 57 , the disc drive 58 and the second frictional washer 59 against the partition 20 . as the shank 501 of the knob 51 is screwed into the pocket 20 , the bearing surface 506 pushes against the disc spring 55 which forces the drag assembly 50 parts of the washers 56 , 57 and 59 surrounding the disc drive 58 and the drive 58 against the partition 20 . the greater the pressure against the spring 55 by the bearing surface 506 , the tighter the disc drive 58 is clamped against the partition 20 thereby limiting its ability to rotate . concomitantly , the less the disc drive 58 can rotate , the less the shaft 300 can rotate thus effectuating a very accurate control by the drag feature of the reel 1 . to prevent rotation of the drag assembly parts within the pocket 13 , the d - shaped washer 56 has ears 524 that bear against the side wall of the pocket 13 as shown in fig4 . thus , when the washers 57 and 59 and the disc spring 55 are rotated with the disc drive 58 , the d - shaped washer 56 acts as the nonrotational member of the drag assembly 50 . in the event that all the parts of the drag assembly 50 mounted in the pocket 20 were able to rotate as the shaft 300 rotated , the drag mechanism 50 could not keep the desired clamping pressure against the disc drive 58 to control its rotation . consequently , the d - shaped washer 56 is the means for preventing the drag assembly 50 from totally rotating in the pocket . since the drag adjusting knob 51 with its fluted surface 528 can be adjusted from the back of the reel , a fisherman &# 39 ; s fingers do not get in the way of the fishing line while adjusting the drag during fishing . the sensitivity of the drag assembly relies , in part , on the use of different materials for the respective parts of the drag assembly 50 . it has been found that the disc spring 55 can be made of flexible metal spring stock that will not take a permanent set when the spring is flattened out . the d - shaped washer 56 preferably can be made from metal such as cold roll steel , stainless steel , etc . the frictional washer 57 is preferably made from a non - metal material such as polytetrafluorothylene fluorocarbon in both castable and sheet form which has good shear strength , good frictional characteristics and very low creep . it has been found desirable that the second friction washer 759 be made from the same material whether it is in the flat rotational form as shown in fig5 and 6 or in the non - rotational form as shown in fig2 and 3 . in order to secure the shank 501 within the pocket 20 , a circular undercut groove 505 is provided on the shank 501 near the bearing surface 506 . a c - shaped retainer clip 53 is positioned in the groove 505 to keep the knob 51 within the pocket 13 . when the threaded flange 52 is used instead of the threaded hole 24 , the retainer clip 505 confines the nut 52 and the shank 501 together keeping both straddling the back wall 21 . in an alternative embodiment of the invention as shown in fig5 and 6 , the invention comprehends that two springs 55 and 520 , two d - shaped washers 56 and 522 and an additional washer 525 can be used for larger fishing reels requiring increased frictional surfaces . the respective holes of these additional parts , 521 , 523 and 526 are all larger in size than the maximum diameter of the shaft 300 ; thus , permitting the shaft 300 to also rotate relative to the second disc spring 520 , the second d - shaped washer 522 and the frictional washer 525 . in this embodiment , the washer 525 is preferably made of metal thus providing two frictional surfaces for the washer 59 &# 39 ; and at the same time preventing the washer 59 &# 39 ; from being chewed up by rotation against the partition 20 in the event that the partition 20 has a rough internal surface created when the housing 10 is die cast . in another embodiment of the invention , the washer 59 , as shown in fig2 and 4 , has a radially extending lug 518 and a cylindrical portion 519 . as shown in fig3 the projection 519 fits in the hole 22 . the lug 518 fits in the undercut slot 531 of the housing 10 thus reventing the washer 59 from rotating . the interface between the washer 59 and the disc drive 58 create a circumferential brake shoe type frictional contact area for the disc drive 58 when axial pressure is applied by the bearing surface 506 . likewise , there is also a circumferential brake shoe type functional contact area that occurs at the interface between the non - rotational d - shaped washer 56 and the frictional washer 57 . these two interfacial frictional engagements provide a great deal of frictional contact area for very small parts . for example , in one fishing reel incorporating such a drag assembly , the diameter of the elements of the assembly are each about one - half inch and the total thickness of the elements mounted between the bearing surface 506 and the partition 20 ( when the shaft is free to rotate ) is less than three - eighths inch and closely approaches one - quarter inch . thus , it has been found that such a small drag assembly can provide a larger amount of interfacial frictional surface engagement to produce , quite surprisingly , a very smooth and sensitive drag control . in another embodiment of the invention , a slot 530 is provided in the pocket 13 parallel to the partition 20 . a j - shaped elongated element 54 having a short leg 541 , a long leg 542 and a free nib end 543 is positioned in the slot 530 and is radially adjacent the serrated surface 533 of the disc drag 58 . the element 54 is fashioned such that the nib end 543 is in contact with the serrated surface 533 . when the shaft 300 keyed to the disc drive 58 rotates , the element 58 makes a clicking sound as the serrated surface 533 causes the nib end 543 to vibrate . the gear housing 28 and the cover plate 14 reinforce the clicking sound acting as a sounding box . the fisherman is acutely aware when the fishing line is being pulled off the spool over the line roller because of the telltale clicking sound . it should be understood , of course , that the specific forms of the invention illustrated and described herein are intended to be representative only , as certain changes and modifications may be made without departing from the scope of the teachings herein disclosed . accordingly , reference should be made to the appended claims in ascertaining the full scope of the invention .
this invention comprehends a small drag assembly that is conveniently mounted in the rear part of the housing of the spinning style fishing reel . the drag assembly includes a knob mounted at the rear of the housing . a pocket is provided in the housing to accommodate the small and simple drag system .