Патент USA US2406493код для вставки
Au8~ 2.7, 1946~ w. <5. DUNN . 2,406,493 IMITATION FIRING MECHANISM FOR TRAINING ARMS ; ‘ Filed Jan. 8, 1945 2 ‘Sheets-Sheet 1 E3Q689Q70 INVEN TOR. 826M?‘ 9% @93 Aug. 27, 1M5. W. G. DUNN 2,406,493 IMITATION FIRING MECHANISM FOR TRAINING ARMS Filed Jan. 8, 1943 2 ‘Sheets-Sheet 2 Patented Aug. 27, 1946 2,466,493 UNITED STATES PATENT OFFICE 2,406,493 IMITATION FIRING MECHANISM FOR ‘ TRAINING ARMS Vlilliam G. Dunn, Clarinda, Iowa ,Application January 8, 1943, Serial No. 471,741 3 Claims. 1 (01. 42-69) 2 My invention relates to an improved form of training arm, as used for military purposes in Figure '7 is a perspective view showing the main casting of the trigger mechanism, and the two training new men. principal operating members, in exploded rela tion; In many instances it is undesirable to put an operative ri?e into the hands of recruits who have had no training or instruction in the care Figure 8 is a fragmentary horizontal sectional View taken substantially on the line 8—8 of Figure and use of such arms. But for practice and drill purposes, it is desirable to provide an inexpensive Figure 9 is an enlarged plan view of the portion arm which will correspond closely to a standard of the arm including the bolt action, parts being weapon in appearance, size and. Weight, and it 10 broken away to show the construction; is further advantageous if such an arm incorpo Figure 10 is a development, showing the blank rates certain operative features which will enable from which the bolt housing is made up, and the carrying out of the customary manual of arms Figure 11 is a fragmentary vertical sectional drill. Speci?cally, it is desirable to have an op View, taken on the line |l-—ll of Figure 9. erative bolt action and a trigger mechanism which 15 is cooked by operation of the bolt. It is an object of my invention to provide a training arm having the advantageous features just outlined. It is a further object to provide a bolt action 20 In the drawings, the reference numeral H] in dicates generally the wooden stock, which may be provided with a regulation sling strap l2. Around the stock are bands I 4 and [6, each carrying sling loops [8 on ?ttings 2!), these parts corresponding to those on the prototype arm which my training mechanism capable of being produced by rela arm simulates. On the under side of the band tively low cost manufacturing methods. i6 is a bayonet ?tting 22. The barrel 24 consists It is a further object of my invention to provide of a short length of rod, with a hole, indicated in a trigger action, cocked by operation of the bolt, dotted lines at 26, drilled at the outer end to simu and releasable by pulling the trigger, with a feel 25 late the bore. The rod extends into a hole 28 in and a click sound simulating the action of a ri?e the stock and is retained by a screw 30 which fas that will shoot. tens the band I 6 and its accompanying ?tting It is a further object to provide a trigger action 2!]. This screw extends into the barrel 24, as in mechanism which can be cheaply assembled from cast parts without the necessity of machining 30 dicated in Figure 3. If the barrel is made of metal, a countersunk or shallow drilled hole 32 operations, and which requires only a single may be provided to receive the end of the screw. If the barrel is made of wood, this is not neces spring. With these and other objects which vwill become sary. apparent as the description proceeds, my inven tion consists in the construction, arrangement and combination of the various parts of my de vice whereby the objects contemplated are at ‘rained. as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein: 40 Figure 1 is a side elevational view of a training arm embodying my invention; Figure 2 is a top View of the same; Figure 3 is a fragmentary sectional View of the The barrel may be provided with a front sight 34. The portion marked 36 in Figure 1 is formed as a part of the wooden stock, but is painted black, to correspond to the blued metal parts which are found in the prototype at this point. A leaf type rear sight 38 may be mounted on the top, in the customary manner. The bolt action of my training arm, indicated generally by the numeral 49, consists principally of a bolt 42 having an operating lever 44 attached to a cam 45 at the rear end of the bolt. The bolt fore part of the arm, on a somewhat larger scale 45 is slidably mounted in a housing 48, and at the forward portion of its movement bears against a Figure 4 is a vertical sectional view taken on coil spring 50 which is mounted in the stock, as the line Ii—4 of Figure 2 and Figure 5; shown in Figure 9. Figure 5 is a fragmentary view of the trigger The housing I form from a heavy sheet metal action and a part of the bolt. the view being part 50 blank 52 having an outline such as that illus iv in elevation and partly in vertical section on trated in Figure 10. The blank is bent along the the line 5—5 of Figure 4; dotted lines 54 and 55 to form the angles 58 and Figure 6 is a view similar to Figure 5, but shows 60, respectively, as seen in the cross-sectional the parts of the trigger mechanism in cocked relation; 55 view’ of Figure 11, and the tongues 62 and 64 are than Figure 1; V V . curved to ?t across the top of the bolt, meeting 2,406,493 are frictionally retained thereby. the similarly curved edge 65 of the blank, as may also been seen in Figure 11. The entire as~ ’ sembly can then be slipped into a mortised recess in the gun stock, where it is retained by screws E22. An extension 524% of the mortised recess The formed-up housing has a ?at bottom, so that it may be eas ily and ?rmly mounted by screws 5| in the notch provided for it on the top of the stock. The shape of the blank leaves an elongated slot 68 on the top side of the housing when it is opens onto the top side of the stock, and permits coaction between an extended head I28 on the hammer and the cam 45 on the bolt. The trigger member 95 has a recess i353, and formed up as described. A ?llister head. screw 19 thehammer. member is provided with a project is carried by the bolt 42, the diameter of the head 10 ing pawl 132 adapted to coact therewith. When being such as to occupy substantially the full the trigger is pulled, it rotates counterclockwise width of the rear portion of the slot. In its for as viewed in Figure 5, and releases the pawl I32 ward portion, the right hand side of the slot, as the gun is viewed from the rear, is widened. by , so that the hammer member can move clockwise, reason of the additional cut-out 12 in the blank.‘ The screw 10 is located on the bolt at such a ' 66; which gives a sharp click, very similar to that allowing the head !28 to strike against the cam point that, as the bolt is slid forward, the spring 50 must be compressed somewhat before the bolt‘ head can pass around the corner ‘M of the hous- -_ ing, when the bolt lever 44 is moved downward. Thus, when the bolt is rotated by pressing down on the lever, the head of the screw ‘ID moves downward into the notch 15. A portion '58 of the edge of this notch is inclined slightly toward occurring in the regulation rifle when the trigger is pulled. _ In Figure 4, the lever 45» is shown in fuli lines in the position it normally occupies after the gun is cocked. After the trigger has been pulled, the lever is raised to the dotted line position of Figure 4, which swings the lobe 635 of the across the head i28 of the hammer member, depressing the head and‘ thus rotating the hammer member counterclockwise, as viewed in Figure 5, to the under the influence of the spring 51}. The result point where the notch let slips over the pawl I32, is a bolt action which has a “feel” very closely the‘ force of the spring tending always to move resembling that of a gun that will shoot. the‘ trigger 95 into latching engagement with the For economy in the use of metal, I prefer to pawl. The trigger mechanism is then in cocked make thebolt itself as a metal tube 8%, formed so. condition, as illustrated in Figure 6. The bolt up, like the housing 48, from a flat sheet. In maybe slid rearwardly, as if to expose the cham training arms using such construction I have ber in‘ the usual inspection routine, and may then found it advisable to fill the tube with a wooden he slid back and rotated again to the full line plug 82, both to give a square surface on the for. position of Figure 4. As I have indicated, the gun ward end of the bolt for adequate bearing against is then cooked and pulling the trigger will release the spring. 5%, and also to extend rearwardly the hammer member. The shape of the cam is as the member 84 simulating the cocking piece such that in the normal locked position of the on an operative ri?e. ‘.Vooden parts such as this bolt the head I23 of the hammer member will en may be given a black or blued ?nish to imitate gage the cam before the hammer member is im thev metal parts which they are supposed to repre 40 peded by the stop H4. This is not a feature of sent. substantial importance since a sharp click is ob The trigger action of my practice arm is. par tained in either case, but it sounds more like the the rear, so that the bolt is locked in the notch ticularly illustrated inFigures 4-8. The trigger mechanism is made particularly convenient for economical manufacture by reason of its arrange real thing when the impact takes place against the cam on the bolt. In addition to the fact that the single spring ment as a subassembly carried on the main cast- ‘r 3 supplies the force both for operating the latch ing or frame 36, which has a side wall portion 88 and end wall portions 98. It carries the trigger guard 92 and mountingears 94. The operative parts of the. trigger mechanism consist of the trigger 96 and the member $3 which I shall refer to as'the hammer. The main frame 86 has mounting posts It!) and I02 cast integral there with, and the hammer and trigger elements have cored holes M14 and W6 ?tting overthe posts. Recesses H38 and. H0 are provided in these ele ments to receive and retain a coil spring H2, which is under compression at all times. when in its workingposition. By reason of the rela tion of the recesses “98 and H0 to the pivot holes and for actuating the hammer, my structure has the advantage that pulling the trigger further compresses the spring. As a result, the trigger , “feel" is very similar to that of an actual rifle; also, after the latch is disengaged when the trig ger is pulled, the further movement of the trigger lever is such as to follow the spring, tending to , keep the force against the hammer from decreas ' ing, and giving a good snappy action. A substantially flat bearing surface use is formed on the trigger 86 adjacent the notch or recess i30, to lie against the pawl 532 when the latter is not engaged in the recess. The bearing surface is of such extent as to follow the pawl to I94 and Hit, the spring, tends to rotate both .the 60 the extreme limit of the hammer movement as hammer member and the trigger member in determined by the stop member illi. When the clockwise directions, as viewed in Figures 5 and 6. hammer is being cooked, the pawl slides freely The main frame carries a stop H4 which limits back along the surface lt? until the recess I38 clockwise rotation of the hammer member 98. is reached; when the recess receives the pawl, the The parts 86, 96 and 98 can be made up as cast hammer is cooked. 7 ings in the form shown in Figure '7 and, if prop From the foregoing description, it will be seen erly made, they need no further machine opera that I have devised a structure adequately ful tions other than tumbling to clean them and re ?lling the various objects originally set forth. move sharp edges. The trigger and hammer are put inplace on.’ the mounting posts and the spring H2 is pressed intoits recesses. The open ‘side of the mounting plate 88 is then covered by a simple sheet metal ' plate H6 having side flanges H8 and I20 which overlap the end walls Q0 of the main frame, and, The arm made as described may be employed for ordinary drill purposes, and in such use will simu late the desired operative functions of a real ri?e. Yetiit' can bemanufactured at very low cost, eliminating any necessity of subjecting the more expensive equipment to carelessness or misuse. 5 2,406,493 Some changes may be made in the construction and arrangement of the parts of my device with out departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modi?ed forms of structure or use of mechanical equivalents which may be reason ably included within their scope. 6 upwardly projecting part, and a spring interposed between the bottom of the recess in the hammer and the upwardly projecting part of the trigger, said hammer having a latching lug for sliding on said forwardly projecting portion and cooperat ing with the recess therein, said hammer having a forwardly and upwardly extending head adapt ed for cooperation with the breech bolt of the I claim as my invention: 1. In a training arm, a stock having a recess training arm, whereby the “click” of a ?rearm is in its under side, a mounting plate in the recess, 10 simulated. a trigger pivoted to the plate and having a for wardly projecting portion provided with a recess in its top, and an upwardly projecting part with a recess in its front edge, a hammer pivoted to the plate above the trigger and having a recess below the horizontal line through the, hammer pivot facing the last recess, and a spring seated in the last two named recesses, said hammer hav ing a latching lug for sliding on said forwardly projecting portion and cooperating with the re cess therein, said hammer having a forwardly and upwardly extending head adapted for coop eration with the breech bolt of the training arm, whereby the “click” of a ?rearm is simulated. 2. In a training arm, a cocking mechanism, in cluding a mounting plate, a trigger pivoted to the plate and having a forwardly projecting portion provided With a recess in its top, and an upward ly projecting part, a hammer pivoted to the plate above the trigger and having a recess below the 30 horizontal line through its pivot facing the said 3. In a training arm, a cocking mechanism, in cluding a mounting plate, a trigger pivoted to the plate and having a forwardly projecting portion provided with a recess in its top, and an upwardly projecting part, a hammer pivoted to the plate above the trigger and having a recess below the horizontal line through its pivot facing the said upwardly projecting part, and a spring interposed between the bottom of the recess in the hammer and the upwardly projecting part of the trigger, said hammer having a latching lug for sliding on said forwardly projecting portion and cooperat ing with the recess therein, said hammer having a forwardly and upwardly extending head adapt ed for cooperation with the breech bolt of the training arm, whereby the “click” of a ?rearm is simulated, said mounting plate having a stop lug overhanging the hammer to limit its pivoted movement away from the trigger. WILLIAM G. DUNN.