Патент USA US2405798код для вставки
Aug“ 13, 1946;; 2,405,798 J. G. SEITZ FIRING MECHANISM Original Filed Nov. 28, 1939 INVENTOR. 155/1 6. 55/12 BY , M’ MK,‘ 2,405,798 Patented Aug. 13, 1946 UNITED STATES PATENT OFFICE 2,405,798 FIRING MECHANISM John G. Seitz, San Francisco, Calif., assignor to Samuel I. Keene, San Francisco, Calif. Original application November 28, 1939, Serial No. 306,481. 7 Divided andrthis application May 6, 1944, Serial No. 534,393 1 Claim. 1 This invention relates to improvements in the ?ring mechanism of ?rearms, and is a division of application, Serial No. 306,481, ?led November 28, 1939, now Patent No. 2,350,833,. dated June 6, 1944. One of the objects of the invention is the pro vision of improved means for causing the actu ation of the ?ring mechanism for ?ring the piece, (Cl. 42-69) 2 or release of the cocking piece, occurs at a point during the release of the trigger after a retrac tion thereof. The “compression type” trigger mechanism is the opposite type in which the re— lease of the cocking piece occurs during retrac tion of the trigger. This latter type is the one most commonly used at the present time; The advantages of a ?ring mechanism in which and which piece may be in any one of the small the ?ring is e?ected by release of the trigger arms, such as the pistol, revolver, ri?e, or shot 10 rather than during retraction thereof are many, gun, wherein the ?ring of the piece is e?ected among which are (1) elimination of nerve strain through a ?nger operated trigger. Another object of the invention is the pro~ vision of improved means associated with the heretofore present where-sighting and positive release of the trigger will effect a ?ring of the so that the operator will be relieved of any tense pressure and tightening of the muscles are re quired simultaneously, (2) the elimination of rel ?nger actuated trigger of a ?rearm for indicat 15 atively long and arduous training required by ing to the user the exact moment at which the novices for gaining a relatively high degree of ?ring mechanism will be actuated for ?ring the accuracy in shooting, (3) elimination of the cartridge during a movement of the trigger in one tendency to draw the sighted ?rearm oif the tar direction and after a greater movement has taken get at the time of ?ring. All of the above elimi place in such direction than in trigger mecha‘ 20 nated disadvantages directly contribute to better nisms of the so-called hair-trigger type. and faster shooting. However where the trigger A still further object of the invention is the mechanism is of the trigger release type it is also provision of improved, safe means operatively desirous that the operator have an indication of associated with the ?nger actuated trigger of a the exact point during release of the trigger at ?rearm of the type in which the ?ring mecha which the ?ring mechanism will be actuated, and nism is actuated for ?ring the cartridge during this actuation should not come at the moment the release of the trigger under the in?uence of when the fully retracted trigger starts its return a spring but checked by the trigger ?nger of the movement under the power of the spring that is operator for indicating to the user the exact compressed during retraction. A slight amount moment at which an extremely slight further 30 of “play” or movement should ?rst be permitted cartridge. ness in holding the trigger retracted. If this Other objects and advantages will appear in movement were not permitted it would be likely the speci?cation and drawing annexed hereto. that the operator would exert far more strength In the drawing, 03 Cl than would be necessary to safely hold the trig Fig. 1 is an enlarged fragmentary side view of ger in retracted position, and would develop an a ri?e at the breech, partially broken away and undesirable nervous tension through fear of acci partially in section, showing an example of my dental release and consequent ?ring of the piece. invention in which the cooking piece is cocked The invention herein provides for a substan but in which the trigger and ?ring mechanism 40 tial and abrupt resistance to the release of the is inoperative for ?ring the piece although the trigger under release of the pressure therein by the trigger ?nger. Upon encountering this re former may be retracted and fully released to travel through its full stroke. sistance (when the release of the trigger is under control of the trigger ?nger during its release) Fig. 2 is a view similar to that of Fig. 1, but in which the ?ring mechanism is operative for the trigger movement will stop until a still fur ?ring the piece at a point during the release of ther release of the pressure by the trigger ?nger the trigger after a full retraction thereof. permits it to move past said resistance. This Fig. 3 is an enlarged fragmentary View of a further movement is very slight so that the trig portion of the ?ring mechanism that is particu ger virtually becomes a “hair trigger” once the larly adapted to accomplish the objects of the 50 said resistance is encountered. It is to be noted invention. that during all this release of the trigger the In describing the particular type of ?ring latter is being moved by the power stored in the mechanism herein, the term “trigger release” spring during retraction of the trigger and the will be used, and which term designates the type force applied to the trigger by the trigger ?nger in which the actuation of the ?ring mechanism 55 is a progressively reduced force rather than a 2,405,798 4 3 force of the trigger ?nger is relieved, as will later be explained more in detail. The lower end of trigger 3 extends downwardly into the area enclosed by the guard bow H, as In detail, the invention as illustrated in the drawing is applied to the conventional 1903 Cl is conventional in most ?rearms. Below the sear l is a horizontally elongated model Spring?eld rifle that is provided with a positive and progressively increasing force as is the case where the compression type trigger mechanism is employed. stock having a pistol grip I, cocking piece 2, trigger 3, bolt 4, and the usual barrel, etc. The cocking piece 2 is provided with the ordinary bar l8 that is pivoted at its forward end to trig- ' ger 3 by a horizontal pivot 19. The upper side sear ‘l for holding the cooking piece 2 cooked which recess is an elongated element 20 secured to or drawn back under the expansive force of the said bar at its forward end by a pivot 2|. usual main spring (not shown). When the sear rear end of said element is formed with an up of said bar is formed with an upwardly opening sear notch 5 for engaging a sear nose 6 on a= 10 recess extending longitudinally of the bar, in The wardly extending projection 22 that provides nose is withdrawn from engagement in the sear notch the cooking piece and conventional striker 15 a forwardly facing shoulder 23 or notch at the forward side of said projection. The rear end (not shown) are released to cause the striker or ofv said element is yieldably supported in a posi ?ring pin to strike the percussion cap of the tion slightly elevated above bar [8 on a spring cartridge. The foregoing elements are old and 24 that is disposed between said element and they, or their equivalents, are usually found ‘in 20 the bottom of the recess in which said element is ?rearms. positioned (Fig-3). ‘ "In the following description the terms “for Bar 18 is movable with triggerv 3. Thus upon 7 ward,” “rear,” and the like, are used with‘ref retracting the trigger the bar l8 carrying ele erence to the barrel. For example, the “forward” ment 20 will move rearwardly and the bar and end or portion of an element is the end or por tion nearest the barrel, and the f'rear” end or 25 element will be carried forwardly by the trigger when the latter'i's released. Spring I61 will‘ effect portion of ‘an element is the end or portion re such forward movement. ' mote from the barrel, while the terms “rear The lower side 25 of chamber‘ 8 carries the wardly” and “forwardly” likewise are used with guard bow i1, said side beingv commonly‘ called reference to the said barrel. All of the'elements a guard plate. Said plate extends rearwardly hereinafter described are‘ disposed rearwardly of of the guard bow at 26, and rear guard screw 21 the barrel and substantially below the bolt. secures said extension 26 to the stock‘ in the‘ usual The sear nose 6 is rigid on sear 1, the latter manner. being an elongated bar extending horizontally At about the juncture of the rearv side'of guard as seen in Figs. 1, ‘2 with the nose 6 positioned bow I‘! with extension 26, the guard plate is at a point intermediate its ends and projecting formed with a, slot 28. Said slot opens down thereabove. Sear 1 is disposed below the ?ring wardly' and outwardly‘ at about the said juncture pin and cocking piece, and in a chamber 8 that and terminates‘ at its‘ upper open end at a point is rearwardly of the magazine 9. ‘ The rear wall below the rear end of bar‘ l8 when the trigger is it] of said magazine constitutes the forward wall of chamber 8. The forward end of sear 1 termi-. 40 in normal forward position. Just rearwardly of the rear end of bar l8‘, and nates adjacent wall If] and spaced slightly from also rearwardly of the upper end of slot 28, the said forward end is an expansion coil spring I! plate 25 is formed with an opening for a vertical that is adapted to react between the upper wall pin'29 to pass therethrough. The lower end of l2 of chamber 8 and said forward end of the sear. Sear pin [3 adjacent the forward end of 45 said opening opens into the slot'2‘8 near the lower end of the latter, the. said slot extending slant said sear, and between spring I i and nose 6, piv ingly upwardly‘ and forwardly from its lower otally supports said sear in said chamber for end. swinging about the horizontal axis of said pin. On the upper end of pin 29' is a block- 301 that The spring ll yieldably urges the rear end of the sear including the nose 5, in an upward‘ direc 50 is adapted to seat in an upwardly opening recess 3!‘. The'recess 3| is formed in an enlargement tion for holding the nose 6 in a position in en 32 projecting from the guard plate into chamber gagement with the sear notch 5. Upon urging 8. This enlargement is at about the juncture be said rear end of the sear downwardly the nose tween extension 26 and said guard‘ plate. The 6 will be released from engagement with the forward wall of recess 3| is slanted upwardly and notch 5 and the ?ring pin will be actuated under the in?uence of the main ?ring pin spring (not shown) for ?ring. The upper end of trigger 3 extends into said chamber 8 and past the sear 1 for pivotal move ment- of the trigger on pivot pin I4, the latter beingsecured. to the walls. of chamber 8 above. the sear, said .sear being notched on its upper side to, pass the said pivot pin. Adjacent pin 14. the upper end of said trigger is formed with a rearwardly projecting enlarged portion i=5. Be. tween said portion 14' and wall I2: is an expansion coil spring it that yieldably urges the lower end of‘ trigger 3 forwardly for holding the same in a forwardly urged position unless and until the same- is retracted or is. moved rearwardly’ by the trigger ?nger of the operator. Upon such re traction of the trigger the spring H5 is compressed and its expansive force is what causes a release of nose 6 from the sear notch, 5 asthe retractiver rearwardly from the forwardly‘ facing side of said wall, and the forward edgev of block‘ 30'is about even with the upper edge of said forward wall. A groove 33‘ (Fig. 3)‘ extends‘ across the upper side of block 36'' transversely of the longi tudinal axis of the ?rearm and the upper side of block 30 rearwardly of‘ the groove 33 is sub stantially higher than the portion of’ the block forwardly of said" groove. This latter ‘portion of block' 3'6‘ has its upper surface extending‘ slant’ ingly in continuation of the slanted upper sur face of the forward wall‘ of the recess‘in which the blockseats (Fig. 1‘); The rear end of bar I8 is slanted on its‘ under side to generally correspond with the slant of the forward wall of recess 3| so that upon' r‘e- traction of trigger 3 the said correspondingly slanted surfaces of bar It‘ and block 30‘ will be in slidable engagement. and the rear end of bar l8 will’ be‘ caused to move upwardly (Fig. 3')‘. 2,405,798 It will be seen (Fig. 1) that when block 30 is seated in recess 3| the rear end of bar l8, includ ing element 22, will be elevated a predetermined distance upon full retraction of trigger 3. The dotted line position indicated in Fig. 1 shows the trigger 3 retracted its full distance, and bar l8 dotted line position in Fig. 2. A preliminary sighting may be taken during which operation the operator may release the pressure on the trigger sui?ciently to permit the bar [8 and ele ment 20 (Fig. 3) to move forwardly until the shoulder or notch 50 in the inclined underside and element 22 are elevated. It is also seen in of the rear end of bar I8 engages the forward Fig. 1 that oscillatory movement of the trigger upper edge of block 30. At this point the for through its full stroke will not cause a release wardly facing shoulder 23 on element 20 engages , of sear nose I 6 from the sear notch since the bar 10 with the projection 36 of cam member 34 and an I8 is not su?iciently elevated. _ abrupt increased resistance will occur due to the The release of the sear nose 6 upon forward straight ahead motion of member 20 against the movement of trigger 3 is effected through actu resistance of projection 36, and a very slight ation of a cam member 34 that is pivoted at 35 further forward movement of the member 20 to the rear end of sear 1 rearwardly of nose 6. 15 would actuate the cam member 34 for releasing Cam member 34 is formed with a downwardly the nose 6 from notch 5 of the cooking piece. At extending projection 36 that terminates at its this point'the operator takes ?nal aim and then lower end at a point spaced above the rear end again releases the pressure on the trigger to per of bar [8 when the latter is in its forward posi mit the release of the cooking piece. tion. The cam member 34 is formed with a por 20 The inclined surfaces at opposite sides of notch tion at its upper end extending upwardly and 50 (Fig. 3), particularly ahead of said notch, en forwardly of pivot 35 and in engagement with the ables the desired forward movement of the bar upper wall I2 of chamber 8. This engagement l8 and member 20 with relatively little release in between said portion of the cam and wall I2 is pressure against the trigger even though the for maintained at all times by action of spring II. 25 wardly facing shoulder 23 of member 2|] were to A stop 31 on said cam below pivot 35 engages the be in engagement with the projection 36 slightly rear end of scar 1 to prevent rearward movement before notch 56 engages member 30 inasmuch, of said projection 36 beyond a predetermined as there would be a, sliding movement of said point while permitting forward movement thereof shoulder relative to projection 36 until the notch un-der force. 30 50 engages the forward upper edge of member 30. Referring to Fig. 2, it will be seen that when Such slow movement of projection 36 that would the block 30 is elevated and is held elevated a occur were the shoulder 23 in engagement there retraction of trigger 3 will cause the rear end of with before notch 50 reached block 30 would be bar 18 and element 29 to be elevated or raised come fast after the notch 50 reaches block 30, to a position where projection 22 on element 20 35 which would result in a fast release of the cock will slidably engage the lower end of projection ing piece upon release of the trigger after notch 36 on cam member 34, thus depressing the rear 58 has reached block 30. end of element 20 against spring 24 until projec The result of the above structure is that the tion 22 passes rearwardly of the lower end of operator is relieved of any nervous tension he projection 36. ‘Thereafter upon release of the 40 would otherwise be under were the ?ring to be trigger 3 and forward movement of bar l8 and effected immediately upon a release of the re element 26, the shoulder 23 on said element will tracted trigger, or at a time not determinable by engage the lower rear corner of projection 36 “feel” on the trigger. Also the fact that the re and will move the projection forwardly thereby lease of the cooking piece is effected by the force causing the upper forward portion of the cam to 45 of the spring l6 as controlled by the trigger move upwardly. This upward movement of said ?nger instead of being effected solely by the force portion of the cam forces the rear end of sear 1 downwardly about pivot l3 thereby releasing the nose 6 from engagement with notch 5 and thus of the trigger ?nger, enables the structure, here comprising notch 50 and block 36, to provide a far more effective indicating means than would causing actuation of the ?ring pin for ?ring. 50 be the case in trigger mechanisms of the com The elevating of block 3!! is effected by an arm pression type. In the “releasing trigger” mech 38, one end of which is pivoted at 39 in the guard anism the muscular tension applied to controlling plate at a point forwardly of pin 29. This arm the release of the trigger is concerned purely with 38 extends rearwardly and downwardly in slot the relatively light force of spring I6 that re 28 below pin 29 and terminates in a plate 40 55 turns the trigger to its forward position and the rearwardly of the guard bow and below pistol grip relaxing of muscular tension is accomplished with I of the stock. This plate 40 is relatively wide far greater steadiness and precision than is pos and is adapted to be comfortably gripped by the sible in increasing physical tension, as occurs in several ?ngers of the hand that embraces the the compression type trigger. This fact makes pistol grip during shooting or during carrying 60 it apparent that the combination of structure pro of the ?rearm in “ready” position, or across the body. In other words, at any time that the ri?e or ?rearm is carried in, or is moved to a posi tion from which it may be ?red, the plate 40 is adapted to be gripped by the ?ngers of the hand that carries the trigger ?nger. This plate 40 thus functions as a safety device inasmuch as the release thereof by the ?ngers gripping it will permit said arm to fall away from the stock to viding for an abrupt increased resistance in a trigger of the releasing type enables the accom plishment of results not possible in a trigger of the compression type. In the event the trigger of applicant's ?rearm is retracted and the operator does not wish to ?re the piece, the mere release of the ?ngers gripping plate 46 so as to permit the dropping of said plate, will result in lowering block 36 away 70 from bar "3 and then the trigger may be released the full line position of Fig. 1 inwhich position any actuation of the trigger will be inoperative without releasing the cooking piece. for releasing the cocking piece. Having described the invention, I claim: In operation the stock of the ri?e or ?rearm In a ?ring mechanism for ?rearms that includes is gripped by the hand adjacent the trigger guard a cocking piece and a, holding means therefor bow and the trigger is fully retracted to the 75 for holding it cocked and movable in one direc 2,405,798 '7 'tion (for releasing the same, ‘a ?nger retractible trigger, a spring connected with said trigger for being tensioned upon such retraction for causing return movement of said trigger against a pre determined resistance by the trigger ?nger below ‘that required ‘for retracting said trigger, means connecting said trigger with said holding means for causing said movement of the latter by said spring upon said trigger moving past a predeter mined ‘point during its said return movement and :10 .for causing an added and abrupt resistance to vsaidreturn movement immediately prior to move 18 ment or :said trigger past said point; said cocking p'iece ‘being released :at said point, said last men tioned means including a notched element :con nected with said trigger :for movement there with, and a member in slidable engagement with ‘said element during said return movement of said trigger and prior to release of said cocking piece and having ‘a shoulder engageable in the notch in said element immediately prior to said movement past said point. JOHN G. SEITZ.