US2233861A - Firearm - Google Patents

Description

March4, 1941. v BROWNING 2,233,861

FIREARM Filed Feb. 8, 1938 2 Sheets-Sheet l MAL Aflaowzwzva March 4, 1941. v BROWNING 2,233,861

FIREARM Filed Feb. 8, 1938 2 Sheets-Sheet 2 gwucwton VAL A. BROWN/N6" Patented Mar. 4, 1941 UNITED STATES FIREARM Val ALBrowniing, Ogden, Utah, assignor to J. M. &

M. S. Browning Company, Ogden, Utah, a corpo'ration of Utah Application February 8, 1938, Serial No. 189,293

In Belgium June 29,1937

16 Claims.

This invention relates to'improvements in firearms and more particularly to firing mechanism for double barrel guns (either of the side-by-side or'fithe' over and under types) in whichthe barrels'may'beifiredin succession upon successive intentional pulls of a single trigger. In firearmsofthe double'barrel; single trigger type, various arrangements of sear trips or connectors are used, and: means are'provided for selectively setting the trip or connector to fire one barrel and then the other. In the manufacture of this'type: of gun, theiideal'conditionis to have the sear rest directly on the 'sear trip.

, However, in manufacturing, and particularly 1.; in production manufacturing, itiis almost impossible to prevent some slight clearance between the sear trips and the sears, and, likewise, it is extremely difficult to have the sears in perfect transverse'alignment. Because of these dif- 30 ficulties, in providing a connector whichis laterally shiftable from under one sear to underthe other, it is generally necessary to enlarge the clearance between the sears "and sear trips to prevent any-catching of the trips on one sear which may be slightly lower than the-"other. Where a pivotal sear-trip is used, the clearance between same may become so large as to produce a noticeable lost motion in the pulling of the trigger. i I i r It is an object 'oflthis invention to overcome these and other disadvantages heretofore found in this type ofgun: I 1 i A further objectis the provision of a connector or sear trip which, in being shifted to selectively engage 'one or the. other of the sears, is al-- wa'ysdrawn' longitudinally out of relative position to the sears, thentransver'sely shifted relative thereto, and then longitudinally returned into position relative to the sears. 'A further object of the present invention is an improved 'selector' meansi=for adjusting the sear tr'iponconn'ectorto initially'fir'e either one or the other of thebar'relsj the'selection being-accompli'shed by a compound movement of the selectormeansl? 4 i i l A still further object is a connector which is universally mou'nted'and having operative connections' with the selector means whereby it will follow the compound movement thereof into the selected position. i

A still further object is a selector which may be located remotely fromj'thej trigger and which w l ve mer ia evv sua indica o esto t set fihereqf: n when z npe-se c ot e cidentally shifted from one position to; another.

'A still further object is a trip or connector which is universallymounted on and pivoted to the trigger and movable laterally and longitudinally relative thereto.

A still further object is an improved means for mounting the sear trip or connector on the trigger and for mounting the selector means on the frame with positive operative connections to the connector.

A further aim of the invention is to provide 10 a firing mechanism having the above and other advantages, which is characterized by its simplicity in construction, its use of a minimum number of parts, its ease of assembly, economy in manufacture, its durability", and by its reliability 5 and effectiveness in operation.

Other objects will be-in part obvious and in part, pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements, and arrangement of parts which will be exemplified in the construction hereafter set forth and the scope of the application of which will be indicated in the appended claims.

a In the accompanying drawings:

Figure l is a side view partly in section showing an embodiment of the invention with the sear trip or connector held in safety position by the selector means;

Fig. 2 is a view similar to Fig. 1 but showing the connector selectively positioned behind the left-hand sear;

Fig. 3 is a view on line' 3-3 of Fig. 2;

Fig. 4 is a view on line 4-4 of Fig. 2;

"Fig. 5 is a detail view of the connector-trigger I mounting;

Fig. 6 is an exploded perspective of the selector means and connector-trigger mounting; and

Figs. 7 to 9 are diagrammatic views illustrating the compound movement for selectively positioning the connector. f

Referring to the drawings, lfldesignates the frame of the gun; only a part thereof being shownasit maybe of any suitable construction. The firing mechanism comprises a pair of .hammers pivotedas-at l4 and provided with searreceiving seats or notches l5. Respectively associated with the hammers is a sear IS; the shape and positioning of same depending upon the type of hammers used. In the embodiment shown, the sears are pivoted at 2 0 to theupper tang piece 22. Each sear is provided-with s. hammer-cooperating tooth 24 adaptedto be seated-in' a cooperating hammer notch -'l5, and a ;5- 5

ing shoulder 62.

relative to the trigger.

rearwardly extending tail piece adapted to cooperate with a sear trip or connector.

The hammers are normally urged into firing position by a main spring 2'! encircling a guide plunger 29, one end of which engages the hammer and the other end being slidably mounted in an opening in the rear tang piece 32 of the frame. Thus, when the gun is cooked, the sear tooth 24 of each sear engages in notch l5 of its respective hammer and plunger 29 is simultaneously moved rearwardly, compressing spring 21 to constantly urge the hammer toward fired position.

Associated with the sears is a sear trip or connector 35, having, adjacent its upper end, a forwardly extending sear-engaging lug 38 provided with an upwardly facing shoulder 40 and, on its respective side surfaces, lugs 42 and 44 having upwardly facing shoulders or surfaces 43 and 45 generally in the plane and spaced rearwardly of shoulder 40. The shoulder 40 is of less width than the spacing between the sear tails 25 (see Fig. 3), thus preventing simultaneous engagement of both sears by the connector shoulder; whereas the connector above the shoulder 40 is Wider than the opening between the sear tails to prevent same from entering therebetween.

The connector is mounted at its lower end on a trigger 46 pivotally mounted on the lower tang piece 41 of the frame. Mounted on the upper end of the connector is an inertia block 49 which is provided with a forwardly projecting lug 50 having a vertical opening 52 therethrough and a pair of forwardly projecting positioning wings 54 spaced below'same. The block is mounted loosely on a reduced part 56 of the connector which is received in opening 52, the wings 54 straddling the connector beneath the lugs 42 and 44 to position same thereon; there also being provided a spring which fits into 'a small bore in the block and abuts against the rear'face of the connector to constantly urge the block rearwardly therefrom.

The particular arrangement of sears, hammers, connector, and inertia block as heretofore described may be used; the particular advantages and detailed description thereof being set forth in my co-pending application Serial No. 87,153, now Patent No. 2,203,378,'filed June 25, 1936.

In accordance with the present invention, the connector 35 is universally mounted on the trigger 46 and is capable of longitudinal and lateral swinging movement relative thereto. As may be seen from Figs. 3 to 5, the lower end 55 of connector 35 is pivotally mounted on a pin 51 carried by the bifurcated end 59 of a connector carrying pin 58. The pin 58 is of circular cross section andadapted to loosely fit in a bore 60 in trigger 46, the pin having a reduced forwardly extending part 6! and a forwardly fac- Intermediate of shoulder 62 and the rearwardly facing end wall 63 of the pin-receiving bore is a spring 64 which nor- 'mally urges pin Ell outwardly in the bore and performs other functions hereinafter set forth. A segment of the bore is cut away to leave a longitudinally extending slot, 66 of greater width than the connector, thereby allowing the connector to be pivoted laterally and longitudinally The trigger is further provided with upwardly extending, spaced apart Wall members 68 in which is fixed a stop pin 1i] against which the connector 35 is normally urged.

The stop pin 10 prevents the connector carrying pin 58 from being forced outward from bore 6t by spring 64 and, being located above the trigger pivot 48, the force resultant therefrom acts to maintain the trigger in its lowermost position.

The positioning of the connector is controlled by alongitudinally and laterally movable safety latch H which is located on the top tang piece 22 of the frame. The latch 1| is provided with two depending fingers 12 and "I4; the finger l2 operatively connecting or engaging the inertia block 49 to move same and control the positioning of the connector. The fingers extend into a guideway 16 in the top tang piece; the guideway being generally the shape of a distorted U having a rectangular opening 79 and oppositely disposed parallel slots and 8| extending forwardly therefrom to either side of a rearwardly extending tongue 18; the slots 89 and 8! to either side thereof being approximately the width of the inertia block engaging finger 12, and the length of the rectangular opening is approximately the over-all length between the front and rear edge, respectively, of the depending fingers. Intermediate of the fingers 12 and 14 is a positioning block 82 of equal width to guideway 16 and of a length approximately equal to the distance between the fingers. The safety latch H and block 82 are held in place by the usual spring member 84 which is provided with a slot 85 and a detent 86. The slot 85 receives the inertia block engaging finger 12 when the slide is placed at right angles thereto and the spring locks in the cut-away portions 73 at the lower end of the finger 12 when the slide is returned to its normal position. When so secured, the spring detent 86 may be received in one of the detent notches 81 or 85 in the lower face of the upper tang piece, and, in addition to securing slide II, the spring also serves to position and hold block 82.

The inertia block engaging finger 72 extends through and below the guideway 15 and is receivable in a slot 90 in the top of the inertia block 49, which'slot terminates short of the rear end of the block in a forwardly facing shoulder 9|. The width of slot 90 in the top face of the block is approximately that of the finger and then widens out in the body of the block. In the embodiment illustrated, there is provided a circular hole 92 beneath the slot 90 and extending from the rear face of the block inwardly; this construction permitting of easy manufacture as it may be readily drilled therein; the edge of the slot in the top of the block serving as a fulcrum about which the block 49 may pivot relative to finger 12.

In operation, it may be assumed that the gun is set as shown in Fig. 2 and as diagrammatically illustrated in Fig. '7; the free end of the connector 35 is tilted towards the left side of the gun (as seen from the stock), with the connector shoulder 43 located beneath the tail 25 of the left sear I 6. In like manner, safety slide H is displaced laterally to the left side of the frame, giving immediate visual indication that the left sear is to be initially tripped. As may be seen in Fig. "7, the inertia block engaging finger 12 is located in slot 80 of guideway '16 and 'the guideway tongue 18 prevents lateral displacement of the safety latch 1|. It will 'also be 's'een 'that'binding of finger 12 and inertia block 49 is prevented because of the enlarged opening 92 beneath the surface slot 90; it being apparent that if the zlll and means connecting said member and said connector and laterally and longitudinally movable in said guideway.

8. In combination, a frame, hammers, sears respectively associated therewith, a trigger, a

connector universally mounted on the trigger to be selectively positioned relative to either of the scars, a movable member on the frame, said frame having a transversely and longitudinally extending guideway, means connecting said member and said connector and transversely and longitudinally movable in said guideway, whereby movement of the member will move said connector to its selected position.

9. In combination, a frame, hammers, sears respectively associated therewith, a trigger, a connector having one end universally mounted on the trigger, an inertia block carried on the other end, a movable member carried on the frame, a finger depending from said member and engaging said inertia block, said frame having a transversely and longitudinally extending guideway through which said finger extends, whereby movement of said finger in said guideway by said member will simultaneously move said block and connector.

10. In combination, a frame, hammers, sears respectively associated therewith, a trigger, a connector having one end universally mounted on the trigger and adapted to be selectively positioned relative to the sears, an inertia block carried. by the other end of the connector, said block having a longitudinally extending opening in the upper surface thereof, a movable member on the frame, a finger depending from said member and extending into the opening in said inertia block, said frame having a transversely and longitudinally extending guideway through which said finger passes, whereby movement of said finger in said guide-way by said member will simultaneously move said block and connector.

11. In combination, a firearm, hammers, sears respectively associated therewith, a trigger, a connector adapted to be positioned relative to the scars, a safety slide mounted on the top face of the frame, a pair of fingers depending downwardly from said slide, a block receivable between said fingers, a guideway in the top face of said frame, said guideway having a rectangular opening approximately the width of the block and of a length equal to the over-all length between the forward and rear edge of said fingers and having a pair of oppositely disposed slots extending forwardly from the rectangular opening, said slots having approximately the width of the forward finger on said safety slide, a spring, means for securing the spring to said forward finger for maintaining said slide and block in position, and operative connections between said finger and connector whereby movement of said slide in the guideway will mov said connector. 1

12. In combination, a frame having sears respectively associated therewith, a trigger, a connector mountcd on the trigger and adapted to be moved transversely relative thereto, an inertia block mounted on said connector, said block having a slot adjacent the top thereof, the face of said slot being relatively narrow at the surface of the block and widening out beneath the surface of the block, a slidable member carried on said frame and mounted for transverse movement thereof, a finger depending from said member and extending into the slot in said inertia block, the opposed edges of said slot being fulcrum points whereby when said member is moved transversely of the frame said block may pivot about said finger.

13. In a firearm of the character described, a trigger having a longitudinal circular bore therein, a circular pin mounted in said bore, a spring intermediate of the pin and the end wall of the bore, a connector mounted on the pin, and a transversely extending stop pin carried by said trigger and positioned above said bore-and rearwardly-of the connector.

14. In a firearm of the character described, a trigger having a longitudinally extending circular bore therein, a circular pin mounted in said bore, said pin terminating in a bifurcated end, a connector pivotally mounted in the bifurcated end of the pin, a spring intermediate of the other end of the pin and the end face of the bore, and a transversely extending stop pin carried by said trigger and positioned above said bore and rearwardly of the connector.

15. In a firearm of the character described, a frame, a trigger pivoted to said frame, said trigger having a longitudinal circular bore therein, a circular pin carried in said bore, a spring intermediate of one end of the pin and the end face of the bore, a connector pivotally mounted on the other end of the pin, and a transversely extending stop pin carried by said trigger and positioned above the pivotal point of the trigger and rearwardly of the connector, whereby said spring will urge the connector into abutment with said transverse pin and maintain the trigger in its lowermost position.

16. In a firearm of the character described, a frame, a safety latch having a pair of downwardly depending fingers, a block adapted to be positioned between said fingers, said block being substantially wider than said fingers, a guideway in said firearm having generally the shape of a distorted U, one of said fingers extending through the guideway and beneath said frame, and a spring inside said frame and adapted to be interlocked with said finger to maintain said safety latch in position.

VAL A. BROWNING.

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