IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0532710
(1983-09-16)
|
발명자
/ 주소 |
- Castellano, Thomas P.
- Mandel, Nathan
|
출원인 / 주소 |
|
대리인 / 주소 |
Freilich, Hornbaker, Rosen & Fernandez
|
인용정보 |
피인용 횟수 :
22 인용 특허 :
1 |
초록
▼
A machinegun pistol is described, which can be reliably switched between semi and full automatic modes by an operator holding the gun in a natural two-hand grip. The gun includes a bolt (20, FIG. 1) and a firing pin device 22 that each slide longitudinally, a trigger assembly with a primary sear (28
A machinegun pistol is described, which can be reliably switched between semi and full automatic modes by an operator holding the gun in a natural two-hand grip. The gun includes a bolt (20, FIG. 1) and a firing pin device 22 that each slide longitudinally, a trigger assembly with a primary sear (28) that is depressed by the trigger for semiautomatic operation, and an auto control member (34) that can be depressed to switch to full automatic operation. When the control member is depressed, it connects a secondary sear (36) with the primary sear. The bolt carries a cam (40) that can depress the secondary sear (36) when the bolt moves forward, to thereby repeatedly depress the primary sear (28) when the two sears are connected during automatic operation. The control member (34) is operated by depressing it into the frame, to avoid errors in the heat of battle. The depressable control member (34, FIG. 2) lies on the right side of the gun, forward of the trigger (14), so that when the left hand (L) is used to also hold the gun, the fingers of the left hand can feel and depress the control member.
대표청구항
▼
1. In a repeating firearm which includes a bolt and firing pin device that can independently slide forward and rearward within a gun frame that holds a barrel, and which also includes a trigger mechanism that can depress a primary sear to release the firing pin device held by the primary sear, the i
1. In a repeating firearm which includes a bolt and firing pin device that can independently slide forward and rearward within a gun frame that holds a barrel, and which also includes a trigger mechanism that can depress a primary sear to release the firing pin device held by the primary sear, the improvement of an auto control for enabling full automatic operation comprising: a secondary sear which can be depressed by said bolt as said bolt moves forward; and mode control means including a manually moveable control member moveable between full auto and semiauto positions, and also including means responsive to the position of said control member, for urging depression of said primary sear at each forward movement of said bolt in the full auto position of said control member, and for refraining from urging depression of said primary sear at each forward movement of said bolt in the semiauto position of said control member, said mode control means coupling said secondary sear to said primary sear at least in the full auto position of said control member so the primary sear can then be depressed by depression of the secondary sear by said bolt; said trigger mechanism includes a trigger which can be pulled and means connecting said trigger to said primary sear to depress said primary sear each time said trigger is pulled; said trigger mechanism also including a stop which lies in the path of depression of said primary sear to prevent its depression when said trigger is not pulled, said stop lying out of the path of depression of said primary sear when said trigger is pulled, whereby even in the full auto position of the manually moveable member release of the trigger stops the firearm from firing. 2. In a repeating firearm which includes a bolt and firing pin device that can independently slide forward and rearward within a gun frame that holds a barrel, and which also includes a trigger mechanism that can depress a primary sear to release the firing pin device held by the primary sear, the improvement of an auto control for enabling full automatic operation comprising: a secondary sear which can be depressed by said bolt as said bolt moves forward; and mode control means including a manually moveable control member moveable between full auto and semiauto positions, and also including means responsive to the position of said control member, for urging depression of said primary sear at each forward movement of said bolt in the full auto position of said control member, and for refraining from urging depression of said primary sear at each forward movement of said bolt in the semiauto position of said control member, said mode control means coupling said secondary sear to said primary sear at least in the full auto position of said control member so the primary sear can then be depressed by depression of the secondary sear by said bolt said manually moveable control member includes a push button lying at a side of said gun frame and depressable in a direction into the gun frame to said full auto position, a button spring urging said button out of said frame, a retainer moveable on said frame to a retain position at which it holds said button in a depressed position, and a retainer spring urging said retainer toward said retain position; said retainer having a handle that can be engaged by the hand of an operator to move the retainer away from said retain position so that button can automatically spring out, whereby the firearm can be locked in its full auto mode by merely depressing a button and leaving it depressed. 3. In a repeating firearm which includes a bolt and firing pin device that can independently slide forward and rearward within a gun frame that holds a barrel, and which also includes a trigger mechanism that can depress a primary sear to release the firing pin device held by the primary sear, the improvement of an auto control for enabling full automatic operation comprising: a secondary sear which can be depressed by said bolt as said bolt moves forward; and mode control means including a manually moveable control member moveable between full auto and semiauto positions, and also including means responsive to the position of said control member, for urging depression of said primary sear at each forward movement of said bolt in the full auto position of said control member, and for refraining from urging depression of said primary sear at each forward movement of said bolt in the semiauto position of said control member, said mode control means coupling said secondary sear to said primary sear at least in the full auto position of said control member so the primary sear can then be depressed by depression of the secondary sear by said bolt; said firearm includes a sear shaft that is rotatably mounted on said gun frame about a sear axis extending perpendicular to the direction of movement of said bolt, said primary and second sears both pivotally mounted about said sear axis; said primary sear is fixed to said shaft while said secondary sear is rotatably fixed to said shaft but is axially slideable thereon; said manually moveable control member is moveable along said sear axis between an inward position at which it holds said secondary sear in the path of said bolt cam to be depressed by it, and an outward position at which it allows said secondary sear to move out of the path of said bolt cam, said inward and outward positions being the full auto and semiauto positons of said member. 4. In a repeating firearm which includes a bolt and firing pin device that can independently slide forward and rearward within a gun frame that holds a barrel, and which also includes a trigger mechanism that can depress a primary sear to release the firing pin device held by the primary sear, the improvement of an auto control for enabling full automatic operation comprising: a secondary sear which can be depressed by said bolt as said bolt moves forward; and mode control means including a manually moveable control member moveable between full auto and semiauto positions, and also including means responsive to the position of said control member, for urging depression of said primary sear at each forward movement of said bolt in the full auto position of said control member, and for refraining from urging depression of said primary sear at each forward movement of said bolt in the semiauto position of said control member, said mode control means coupling said secondary sear to said primary sear at least in the full auto position of said control member so the primary sear can then be depressed by depression of the secondary sear by said bolt; said trigger mechanism includes a trigger pivotally mounted on said gun frame said trigger having a finger-engaging arm which can be pulled by a person's finger and having a horn arm, a horn pivotally mounted on the end of said horn arm, and a horn spring which urges said horn arm and said horn in at least a partially upward direction, said horn having a tip which can pivot on said pivot surface and move off said surface; said primary sear has a ledge with an upper surface and a primarily vertical rearward surface that form a corner where they meet, said horn having a cam lying over and forward of said corner to depress said sear as said finter-engaging arm is moved rearwardly by up to a predetermined angle from an extreme forward position, said horn cam being short enough that it passes behind said corner and releases said primary sear to move back to its undepressed position when said trigger pivots beyond said predetermined angle; said horn spring urging said horn to pivot in a direction to move the front of said horn cam forward, so as said horn rises the front of said horn cam slides up along said vertical rearward surface of said sear ledge until the front of said cam reaches said corner, at which time said cam front moves forward to lie over said ledge upper surface. 5. A repeating firearm, comprising: a gun frame with front and rear ends; a gun barrel mounted on said frame; a bolt moveable in predetermined longitudinal directions in said frame, including a forward longitudinal direction to chamber a cartridge at the rear of the barrel, and a rearward direction, said bolt having a bolt cam that moves along a predetermined path as said bolt moves forward; a firing pin device moveable forwardly in said frame independently of said bolt to fire a chambered cartridge, and moveable rearwardly; a trigger mounted on said frame and moveable by a person from a forward position to a rearward position; a primary sear which can prevent forward movement of said firing pin device and which can be depressed to release said firing pin device to move forward, said trigger coupled to said primary sear to depress it when the trigger is moved to said rearward position; a secondary sear; a manually operable member that can move between full auto and semiauto positions, said member coupled to said secondary sear to move it into the path of said bolt cam when the member is moved to said full auto position, so that during forward movement of said bolt said bolt cam can depress said secondary sear, and to move said secondary sear out of the path of said bolt cam when the member is moved to said semiauto position; and means for pivotally connecting said secondary and primary sears at least when said secondary sear lies in the path of said bolt cam, to urge depression of said primary sear when said secondary sear is depressed. 6. The firearm described in claim 5 including: a spring which moves said trigger to a forward position when it is released and a stop positioned in the path of depression of said primary sear to prevent its depression when said trigger is in its forward position. 7. The firearm described in claim 5 including: stop means responsive to the position of said trigger for preventing depression of the primary sear when the trigger is in said forward position; and wherein said means for pivotally connecting said sears has a moderate resilience which is great enough to allow the secondary sear to be depressed by said bolt cam even when the primary sear is prevented from being depressed, but said resilience being small enough to assure depression of the primary sear at every depression of the secondary sear when said stop means for preventing depression does not prevent depression of the primary sear. 8. In a gun having a trigger mechanism mounted on a gun frame for releasing a firing pin device the improvement wherein: said gun frame has a pivot surface; said trigger mechanism includes a trigger pivotally mounted on said gun frame said trigger having a finger-engaging arm which can be pulled by a person's finger and having a horn arm, a horn pivotally mounted on the end of said horn arm, and a horn spring which urges said horn arm and said horn in at least a partially upward direction, said horn having a tip which can pivot on said pivot surface and move off said surface; said primary sear has a ledge with an upper surface and a primarily vertical rearward surface that form a corner where they meet, said horn having a cam lying over and forward of said corner to depress said sear as said finger-engaging arm is moved rearwardly by up to a predetermined angle from an extreme forward position, said horn cam being short enough that it passes behind said corner and releases said primary sear to move back to its undepressed position when said trigger pivots beyond said predetermined angle; said horn spring urging said horn to pivot in a direction to move the front of said horn cam forward as well as upward, so as said horn rises the front of said horn cam slides up along said vertical rearward surface of said sear ledge until the front of said cam reaches said corner, at which time said cam front moves forward to lie over said ledge upper surface.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.