US2356727A

US2356727A - Firearm

Info

Publication number: US2356727A
Application number: US377867A
Authority: US
Inventors: Eugene G Reising
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-02-07
Filing date: 1941-02-07
Publication date: 1944-08-22
Anticipated expiration: 1961-08-22

Description

Aug. 22, 1944. E. G. REISING FIREARM Filed Feb. 7, 1941 Patented Aug. 22, 1944 UNHTED STATES PATENT OFFHQE FIREARM Eugene G. Reising, Hartford, Conn. Application February 7, 1941, Serial No. 377,867

6 Claims This invention relates to firearms and presents improvements over the invention disclosed in my co-pending application Serial No. 342,979, filed June 28, 1940, for Firearms.

Objects of the invention include the provision of a firearm having selector means whereby it may be fired in semi-automatic or fully automatic conditions, and in which the selector is efiective to act as a safety device; the provision of means to prevent any possible accidental fire when the bolt is not in locked condition; and the provision of a firearm as recited which is simple and efficient in operation and construction.

Other objects and advantages of the. invention -will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. 1 is a view in central longitudinal section thru the receiver showing the parts in cocked condition for semi-automatic fire;

Fig. 2 is a view in elevation with parts broken away and showing the selector in position for semi-automatic fire;

Fig.3 is a detail view which shows the selector in safety position; and

Fig. 4 is a detail view which shows the automatic connector and selector in position for fully automatic fire.

Referring in detail to the drawing, the numeral l indicates the stock of the firearm, and H indicates the forepiece, these parts being broken away. for illustrative purposes. A receiver I2 is secured to the fore-piece as by a stud or other means I 3 which may be screwed into or otherwise fastened to the parts. A barrel i5 is fastened to the receiver in any desired manner.

A breech-bolt I6 is slidably mounted in a longitudinal chamber H in the receiver, and the bolt isprovided with a longitudinal central firingpin l8 which is normally urged rearwardly by a firing-pin spring l9. This firing pin extends in position to fire a shell in the breech as illustrated in my aforesaid application, and is limited in its .travel by pin 20 entering a recess in the side of the firing pin. An extractor and ejector of conventional design may be used, these elements not being here shown for clarity of illustration. 4

Chamber I! has a retarding recess N in its upper side of the same cross-section as ,the breech-bolt, and this recess terminates in a beveled retarding shoulder 22 to receive a corresponding bevel on therear ,end of the bolt as shown in Fig. 1. A recess 23 is formed on the underside of the bolt, this recess having its forward end wall 24 beveled toward the rear to contact a similar beveledshoulder 25 on the forward end of a lug 26, fixedat the rear end of an action bar '21. The action baris longitudinally slidable in A magazine 33 extends upwardly thru an open-,

ing in the fore-piece and in position to deliver cartridges into the breech, and an ejector opening 34 is provided in the receiver. The cartridges will seat in the path of movement of the bolt 16 as illustrated in my said application.

A screw plug 35 threaded into the rear end of the receiver closes chamber l1, andthis plug has a spring-supporting rod 36 for a hammer spring 31. Hammer 38 is generally hollow and cylindrical and fits over the rod and spring and is thus constantly urged forwardly for contact with the firing pin 3. The forward end of the hammer has an aperture 39 slightly larger in diameter than the firing pin, and a pair of longitudinally spaced shoulders 40,, which are adapted to be successively engaged by a complementary shoulder on a sear 42, on the rearward stroke of the hammer. ,The sear is pivoted on a sear pin 43 mounted orra'searsupporting lug M depending from the receiver, and is spring-pressed into engagement with the hammer shoulders as shown in Fig. 1. The sear has a firing shoulder 45located intermediate its height and a lateral depending leg 46 for a purpose to be described.

Firing shoulder 45 is adapted for engagement with a complementary shoulder 41 on a disconnector 48 which is pivotally mounted at its rear end at 43 on a pivoted trigger 50 and extends forwardly ending in a cam surface 5| located in the path of movement of the action bar lug 26. The trigger 50 is sprin -pressed in a forward direction .by trigger spring 52 and the disconnector is urged upwardly by disconnector spring 53.

An action bar supporting stud 54 is provided with a'notch 55 to receive a lip 56 on lug 26 to support the action bar at the forward end of its stroke,.and the lug has a beveled surface 51 adapted for engagement with a complementary surface 58 in recess 23 in the bolt 16 for manual operation of the bolt by finger piece 3|.

. the bolt.

nector is spring-pressed downwardly at its rear end by connector spring I which may be mounted conveniently in the sear lug or other element. At its forward end, the connector terminates in an upwardly extending hook 62 adapted for selective engagement with a notch 83 in the action barlug 26. The trigger ill is provided with a lift pin 64 for engagement with arear surface 65 on the connector to hold the latter out of the path of action bar lug 2i.

The disconnector II is provided with a forwardly extending lug O6 and the automatic connector has a short flange '1 with a guide lip Bl. The receiver slidingly mounts a selector element 69 having a thumb piece 10 and a pointer "H for alignment with three stations marked 8 for safety, SA for semi-automatic, and FA for fully automatic, as shown in Figs. 2 and 3. A strap 1! depends from the selector and has an end flange II which controls the parts to lock the connector and disconnector against any firing action, as seen in Fig. 3, i. e., neither of these elements can rise and the disconnector is cammed out of engagement with the sear.

With the seelctor on position SA, as seen in Figs. 1 and 2, the disconnector ll is freed of the flange I3 and the firearm is operable semi-automatically as the trigger will cause the disconnector to actuate the sear each time it is pressed. However, in this position of the selector the automatic connector 59 is still prevented from rising by the selector flange and therefore it is not operable, as the sear movement will only reciprocate the connector slightly and this, does not affeet the fire, while the lift pin ll only has the effect of depressing hook 02.

If the selector is placed at position FA, the selector flange 13 will be free of both the connector and disconnector, see Fig. 4, and therefore as the trigger is pulled and the lift pin disengages surface 65 of the connector, the latters spring 6i will pivot the connector counterclockwise on pin 60, and hook 62 will be in position to engage in recess 63 in the action bar lug 26. Hence the action bar causes firing action of the sear when it reaches its forwardmost position under influence of spring 28 by pulling forwardly on the connector, and the firearm will be seen to automatically fire until the trigger is released and the lift pin 64 engages the connector to move hook 62 out of the path of the action bar lug 26. It is to be noted that this construction does not impair or in any way affect the delayed action of the bolt it, which always is located in raised position as shown in Fig. l, at the instant the action bar lug reaches its forwardmost position to release the sear.

It is a possibility that the hammer might not move to the left far enough to be stopped by the sear and therefore could follow the bolt and actuate the firing pin prior to locked condition of Therefore, the notch III is provided, so that the hammer will be cocked even though not in normal cocking position. Also, the aperture 39 will insure that, even if the hammer did follow the bolt to the right, the firing pin could not be actuated until it israised to its off-center position in locked condition of the bolt. These features provide a double safety against accidental pre-firing.

Having thus described my invention and the advantages thereof, I do not wish to be limited ed on said support, a breech bolt chamber in said receiver, firing mechanism including a hammer,

' a sear for latching the hammer, a reciprocable breech bolt in said chamber, and a firing pin in said breech bolt for engagement by the hammer upon release of the latter by the sear, an action 2. A firearm having a support, a receiver on said support, a breech bolt chamber in said receiver, a breech bolt located insaid chamber for reciprocation therein, an action bar reciprocably.

mounted adjacent said receiver and having means to urge it forwardly, said action bar being engaged with said bolt, a recess in said action bar, a sear pivotally mounted on said receiver, a connector pivoted to said sear, a lug on said connector adapted for positive locking engagement in saidrecess, a connector spring urging said connector to'lug-engaging position, means selectively effective to interdict the spring action, a barrel on said receiver, and a trigger normally bearing on the connector and moving the latter out of lug-engaging position against the action of the connector spring. I, v

' 3. In a firearm, the combination of a support, a receiver having a barrel on said support, a breech bolt chamber in said receiver, firing mechanism on said support including a breech bolt located for reciprocatory motion'in said chamber, an action bar siidably mounted on said support and engaged with said bolt, and means normally urging said action bar forwardly; with a sear, a disconnector adapted to engage said sear, a trigger, said disconnector being secured to said trigger, a connector mounted on said sear, and interengaging means on said action bar and said connector effective to draw said connector forwardly at the forwardmost limit of movement of said action bar.

4. The combination recited in claim a including selector means selectively movable to 8- p0- sition wherein it engages and holds said connector and disconnector, and to a position wherein it engages and holds said connector alone.

5. The combination recited in claim 3, including means on said trigger adapted to move said to the details hereindisclosed, otherwise than as connector in a direction opposite to its springurged movement.

6. In a firearm the combination of a receiver, a breech bolt in said receiver, a hammer in said receiver, a sear cocking said hammer in spaced relation to said bolt when the latter is in breechclosed position, and a firing pin in said bolt for engagement by the hammer upon release of the latter by the sear; with means for providing automatic fire of said firearm includinga' trigger, a spring normally urging said trigger in one direction, a bar mounted to reciprocate parallel to said bolt, said bar and bolt being interengaged, a spring normally urging said bar and therefore said bolt to breech-closed position, an element connected to said sear, said element forming a connector having means for engagement with said bar whereby the latter will pull the former and ment out of position for engagement with said bar while said trigger is in its spring-urged position, and a spring for positioning said connector element in position to be engaged by said bar 5 upon movement of said trigger in the opposite direction.

EUGENE G. REISING.