US2435184A - Sear and bolt mechanism for single-shot firearms - Google Patents

Description

' Jan. 27, 1948. E. G. REISING 2,435,184

SEAR AND BOLT MECHANISM FOR SINGLE SHOT FIREARMS Filed May 7, 1945 I IN VEN TOR.

E -395M: GREIsING Patented Jan. 27, 1948 UNITED STATE sEAR AND-BOLT MECHANISM FoR SINGLE-SHOT FIREARMS Eugene Reising, Hartford, Conn. Application y a, 1945, Serial No. 592,302

2 Claims. 1

This invention relates to bolt-action firearms and more particularly to the sear and bolt mechanism thereof.

Objects of the invention include the provision of a hand-operated bolt located for reciprocation and rotation in a receiver to eject a spent shell and. to cock the firing pin, the latter being located in the bolt, in combination with a sear normally locked by a trigger in position to hold the firing pin cocked, the sear nose being yieldingly located in a slot in the bottom of the bolt, and being depressed by means of the firing pin spring when the trigger is pressed, the bolt slot terminating in an angular abutment adjacent its forward end so that the sear stops the bolt in its retractive movement unless the trigger is simultaneously pressed to unlock the scar and thus provide for depression of the latter by the angular abutment acting as a cam.

Further objects of the invention include the provision of a pivoted sear having a spring normally projecting a nose portion of the sear into the path of a firing pin and of the bolt to both hold the firing pin cocked and to act as a bolt stop, the sear being locked in this position by the trigger, so that as the trigger is pressed, the firing pin spring is enabled. to depress the sear to fire the weapon, but the bolt cannot be removed unless it is retracted and the trigger pressed at the same time, since the sear is always locked by the trigger in raised position except when the trigger is pressed.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is a longitudinal section through a firearm illustrating the invention;

Fig. 2 is a view similar to Fig. 1 but showing the parts in a different position; and

Fig. 3 is a diagrammatic view showing the action of the bolt on the sear.

The firearm illustrating the present invention is shown as having a' receiver with a barrel l2 secured thereto and a hand-operated bolt 14 therein. The bolt is provided with a firing pin I 6 having depending lugs 18 and IS with a rotary cocking cam 20 located therebetween to cock the firing pin by bearing on the rear lug l9 against the action of the firing pin spring 2|. The firing pin reciprocates in a longitudinal opening 22 in the bolt between firing and cocked positions, and a slot 24 opens to the bottom of the bolt and terminates adjacent the forward end of the bolt in an inclined abutment or shoulder 26.

A stud 28 depends from the receiver and pivotally mounts a sear 30 thereon. A sear spring 32 urges the sear in a counterclockwise direction so that normally the sear nose 34 extends upwardly into slot 24 in the bolt. The rear face of the sear nose is substantially vertical but the front face 3% is inclined to a slightly less degree than the inclined abutment 28, as clearly shown in Fig. 3. The Fig. 1 disclosure shows the parts in cocked condition, and due to the sear spring this is the normal condition of the sear.

The sear is provided with a stop 38 and a looking notch 40, the latter receiving the nose 42 of a trigger 44 mounted on a stud 46. A trigger spring 48 constantly urges the trigger in a counterclockwise direction so that the trigger always automatically locks the sear in raised position as shown in Fig. 1, and the only time the sear is unlocked is when the trigger is pressed.

With the parts cocked, as in Fig. 1, the trigger is pressed releasing the sear which is depressed or turned clockwise by the pressure of the firing pin spring 2| through the mediary of the forward lug l8 pressing on the vertical rear face of the sear nose 34, whereupon the piece is fired. The firing pin is cocked by rotating the cooking cam 20 and the spent shell is extracted by retraction of the bolt in the usual manner. The sear has now been returned to raised position by its spring 32 and it is automatically locked by the trigger nose 42 if the finger has released the trigger, as

must be the case as the bolt is worked by the right hand of the shooter. Hence the sear stops the retractive motion of the bolt by engagement of abutment 26 on the inclined front face 36 of the sear nose.

However, if it is desired to remove the bolt, th trigger is pressed as the bolt is withdrawn thus releasing the sear and leaving the latter free to be cammed down by the abutment at 26 to release the bolt.

Fig. 3 shows the slight difierence in angularity of surfaces 26 and 36 and it will be observed that the lowermost point of the abutment 26 strikes the inclined face 36 of the sear nose, this easing the action which would be otherwise difficult due to the line of force reaction from the abutment through the pivot pin 58' of the sear.

The above described construction provides an inexpensive and easily operable bolt action for firearms which utilizes the sear as a bolt stop without the extra parts usually necessary for this purpose, and it is pointed out that the sear does double duty, acting as sear for the firing pin and as a bolt stop in a simple manner.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A bolt-action firearm comprising a receiver, a hand-operated bolt therein, a firing pin, a sear, said sear having a nose provided with a rear firing pin stoppingface and .aliorwardsinclined face, said bolt having a slot receiving theesear nose, said slot terminating in an inclined abutment adjacent the forward end of the bolt for engagement with the inclined sear nose face to cam the sear out of the slot, and a-trigger= normally locking the sear with the sear nosedn-"the bolt. slot, said trigger being actuatable -to releasetthe sear, and yielding means to urge the sear to bolt stopping position.

2. The firearm of claim 1 wherein the inclined abutment is at a greater angle to the line of bolt movement than the inclined sear nose face.

EUGENE G. REISING.

REFERENCES CITED The following references are of record in the ,file of ithis patent:

"UNITED STATES PATENTS

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