Gun trigger actuator
The present invention relates to a gun trigger actuator which converts a manual trigger to an optionally mechanical trigger in lever action rifles, such as the Winchester Model 94 lever action rifle. More particularly, the present invention relates to a fulcrum which is pivotably mounted on a pivot pin to the trigger guard portion of the rifle lever just below and forwardly of the tip of the trigger. The fulcrum pivots on the trigger guard from a passive off position to an active firing position and can optionally be employed to mechanically fire the gun by exerting force on the trigger, thereby actuating the trigger, when the lever is rotated to a closed position. The present invention may also includes a trigger shim which is installed in the receiver in front of the trigger to eliminate slack in the trigger and properly fix the trigger in position in relation to the fulcrum. The present invention may also include an enlarged finger opening in the lever in order to accept a user's wrist or arm. This allows the gun to be employed by a person with limited or no use of their fingers or hands.
(a) Field of the Invention
The present invention relates to a gun trigger actuator which converts a manual trigger to an optionally mechanical trigger in lever action rifles. More particularly, the present invention relates to a fulcrum which is pivotably mounted on a pivot pin to the trigger guard portion of the rifle lever just below and forwardly of the tip of the trigger. The fulcrum pivots on the trigger guard from a passive off position to an active firing position and can optionally be employed to mechanically fire the gun by exerting force on the trigger, thereby actuating the trigger, when the lever is rotated to a closed position. The present invention may also includes a trigger shim which is installed in the receiver in front of the trigger to eliminate slack in the trigger and properly fix the trigger in position in relation to the fulcrum and may also include an enlarged finger opening in the lever for accepting a user's wrist or arm.
(b) Description of the Prior Art
U.S. Pat. No. 2,920,413 to Marhefka et al. teaches an “Arctic trigger” comprised in part of a pair of clamp locks adapted to be fitted about a trigger, a clip slide to provide an extension to the trigger consisting in part of a pair of elongated members which are rigidly connected by a rod. The clamp locks are attached to an operating bar, which substantially simulates the contour of the trigger guard. A flat spring is positioned between the trigger guard and the operating bar. To fire the gun, the operator grasps the stock and bar with one hand and squeezes, whereby the trigger is moved rearwardly to fire the gun.
U.S. Pat. No. 1,837,093 to Andrews teaches a gun trigger actuating device comprising a bell crank lever mounted on the stock of the gun, one arm of the lever extending downwardly to a point below the trigger guard of the gun, a lever mounted on the bell crank lever and extended upwardly to engage the lower end of the trigger of the gun, and the opposite end of the bell crank lever adapted to be forced downwardly to operate the lever and trigger.
U.S. Pat. No. 1,513,654 to Thompson teaches a spring-actuated plunger slidably mounted in a bar or hollow barrel, which is secured within the trigger guard. When the plunger is released, the plunger strikes the trigger with sufficient impact to discharge the firearm.
U.S. Pat. No. 477,764 to Mercer teaches a self-acting, breech-loading, and hammerless gun. An oscillating hand-lever is connected to a link, which is connected to a movable block which forms both an abutment and a cartridge extracting and loading device. By pushing the hand-hold e′ of lever E down and forward, the block is retracted and the firing-pin or hammer cocked. A cartridge can then be inserted by hand into the breech of the barrel and the lever E retracted, throwing the block forward, causing the block to firmly hold the cartridge in place and to act as the abutment for receiving the shock of the explosion. Lever E may have a cam E4 formed on it in such a position that it will engage the trigger and release the firing pin just after the block has reached the limit of its forward movement and been locked with the cartridge in the barrel.
U.S. Pat. No. 181,855 to Leonard teaches a trigger having a set-screw in the finger-lever of a rifle, in such a position as to engage with the back of the trigger and push the trigger forward, setting the set-trigger, when the finger-lever is moved up or down.
The television series “The Rifleman” made known a lever action rifle with a fixed screw incorporated into the trigger guard which tripped the trigger every time the lever was closed, thus firing the gun.
SUMMARY OF THE INVENTIONThe present invention relates to a gun trigger actuator for activating a trigger to fire a rifle and converts a manual trigger to an optionally mechanical trigger in lever action rifles, such as the Winchester Model 94 lever action rifle. While the invention can be modified to fit a multitude of different rifles, this invention is described herein for use with post 1990 manufactured Winchester Model 94 lever action rifles in the calibers of .38, .357, .44 Magnum, and .45 Long Colt and any versions of the low pressure low velocity calibers introduced for the Model 94 lever action rifle. The invention may also be used with rifles employed for target practice and marksmanship competitions.
In the field of lever action and rapid fire rifles, the typical lever action rifle will fire a single round when the trigger is squeezed if there is one round in the chamber and the hammer is cocked. If the magazine contains one or more cartridges, another round may be chambered after a cartridge is fired by rotating the lever down through a short arc until the lever is fully forward, which extracts and ejects the empty cartridge case from the chamber, cocks the hammer and chambers a fresh round. The closing of the lever, which positions the lever parallel to the grip stock, will transfer a new cartridge from the magazine to the chamber, leaving the hammer in a cocked ready to fire position. The user must then manually pull the trigger to fire the rifle. This sequence of operation may be followed until both the magazine and chamber are empty. Handicapped users and users having a temporary or permanent impairment of their fingers or hands often have difficulty firing a standard lever action rifle due to difficulty working the trigger and sometimes difficulty working the standard sized finger opening portion of the rifle lever.
In a rifle having the gun trigger actuator of the present invention, the rifle may optionally be fired by closing the lever rather than manually pulling the trigger. To accomplish this, a fulcrum is pivoted into its active firing position so that the trigger is actuated and the rifle fires when the lever is closed. Firing of a lever action rifle by handicapped users and users having a temporary or permanent impairment of their fingers or hands has often presented problems due to difficulty working the trigger and sometimes also difficulty working the standard sized finger opening portion of the rifle lever. This invention provides a convenient, fast and simple apparatus for firing a rifle by actuating the trigger by closing the rifle lever. The invention may also include an enlarged finger opening in the lever in order to accept a user's wrist or arm. These improvements allow the rifle to be fired by a person with less than full use of their fingers or hands.
The gun trigger actuator of the present invention comprises a fulcrum which is rotatably mounted to a rifle lever, a pivot pin for mounting the fulcrum and which acts as a pivot point for the fulcrum, and a shim positioned in the receiver directly in front of the trigger to reduce slack in the trigger and hold the trigger in a more rearward position when at rest. The fulcrum is rotatably mounted to the inside of the lever's trigger guard at a pivot point adjacent to and forward of the bottom end of the trigger. The fulcrum rotates on a pin and may be placed in an active firing position or an passive off position. When in the active firing position, the fulcrum is rotated upward and forward of the trigger. The fulcrum exerts pressure on the trigger front face when the lever is closed, pushing the trigger rearward, actuating the trigger and thereby firing the rifle. When the fulcrum is in the active firing position, the rifle can be rapidly fired with the rifle positioned at the user's shoulder, body mid-section or hip by repeatedly opening and closing the lever. The rifle can also be fired by cocking the rifle and just squeezing the lever with the palm of the hand or part of a limb.
The fulcrum may be rotated downward and rearward to its passive off position flush against the trigger guard, so that the fulcrum makes no contact with the trigger when the lever is closed. This off position allows the user to use the rifle lever to chamber another round and then close the lever without firing the rifle. Additionally, when the fulcrum is in the passive off position, the trigger can be used manually and there is ample space for the user to insert a finger in front of the trigger for manual operation. The rifle remains in its manual mode until such time as the user rotates the fulcrum from the passive off position to the active firing position.
The present invention provides distinct advantages over the prior art structures, in that it allows a rifle to optionally be fired singly, or to be fired in a rapid fire method by the closing and opening of the lever alone which does not require manually pulling the trigger. The mechanical firing feature is optional and may be turned off by simply rotating the fulcrum into its passive position.
An additional advantage is that the fulcrum may be mounted to a standard factory rifle lever and the shim is installed in an existing space in the receiver in front of the trigger. All parts of the present invention are inexpensive, easily installed, and easy to use, and the invention can be easily removed and the rifle easily converted back to its original factory form.
An additional advantage is that the trigger actuation by the present invention requires indirect mechanical force on the trigger rather than direct force to be exerted manually on the trigger to push or pull the trigger directly rearward. In order to pull the trigger of a rifle, exertion on the trigger of a force of three to five pounds is generally required. When the force required to pull the trigger is less than approximately two and one half pounds, the gun may become very dangerous. The present invention does not alter or modify the manufacturer's trigger pull requirements. Instead, the fulcrum translates the rotational motion of the lever into mechanical rearward pressure against the trigger, allowing for the utilization of the lever itself to exert the force needed to fire the rifle without requiring the user to manually pull the trigger.
The present invention was designed for use by marksmen, sportsmen, Cowboy Action enthusiasts, users wearing mittens, partial amputees or other physically impaired people. An additional advantage of the invention is that the invention improves the ability of users having temporary or permanent impairments to their fingers or hands to fire a lever action rifle by eliminating the need to manually pull the trigger. The invention may also include an enlarged finger opening in the lever in order to accept a user's wrist or arm, allowing the rifle to be fired by a person with limited or no use of their fingers or hands.
An additional advantage of the invention is that the installed trigger shim eliminates slack in the trigger and holds the trigger in its most stationary position, which reduces the possibility of injury to the shooter, trigger over travel and premature tripping of the hammer.
Even more particularly, the preferred embodiment of the gun trigger actuator of the present invention for a lever action rifle having a trigger having a trigger bottom end a lever having a trigger guard and a finger portion, and a receiver, comprises: a fulcrum having a front end, a back end, a top face, a bottom face, a left side, at least one aperture toward the front end, the at least one aperture comprising a first aperture and a second aperture, the first aperture located on the fulcrum left side, the second aperture located on the fulcrum right side, and at least one tab extending outwardly at an angle towards the fulcrum back end; at least one pivot pin, where the at least one pivot pin extends completely through the lever through the trigger guard portion of the lever and is received by the first aperture and the second aperture and rotatably secures the fulcrum to the trigger guard portion; a trigger shim, where the trigger shim is installed in the rifle receiver immediately adjacent and forward of the trigger; where the fulcrum is shaped to allow rotation of the fulcrum on the trigger guard and the fulcrum is rotatable between a trigger engaging position and a passive position; where the fulcrum has a longitudinal slot in the top face, the longitudinal slot extending towards the front end and the back end and the longitudinal slot is sized to allow the trigger bottom end to easily travel through the longitudinal slot when rearward pressure is applied to the trigger; where the trigger bottom end is spaced above the fulcrum and travels over the fulcrum when rearward pressure is applied to the trigger; where the trigger shim minimizes unnecessary forward movement of the trigger and holds the trigger in a rearward position; where the fulcrum is mounted on the trigger guard below the trigger bottom end in a passive position, the front end rotatably secured by the pivot pin forward of the trigger bottom end, and the back end extending rearwardly along and above the trigger guard; where when the fulcrum is in the passive position, the rifle may be fired by manually applying rearward pressure to the trigger; where the fulcrum rotates on the pivot pin to an active position where the fulcrum back end extends upward at an angle forward of the trigger bottom end; where when the fulcrum is in the active position and the lever is in a closed position, the bottom face is in contact with the trigger and the fulcrum exerts rearward pressure on the trigger; where when the fulcrum is in the active position, the rearward pressure on the trigger exerted by the fulcrum causes the rifle to fire; and where when the fulcrum is in the active position, the rifle may be fired by closing the lever.
BRIEF DESCRIPTION OF THE DRAWINGSA better understanding of the present invention will be had upon reference to the following description in conjunction with the accompanying drawings, wherein:
With reference to the Figures,
As shown in
The fulcrum 150 is preferably made out of low carbon ductile metal, but may be made of any suitable metal or plastic material. The pivot pin 180 may consist of at least one of a suitable variety of rivets, staid pins, bolts or screws, possibly used in combination with at least one nut, wing nut, lock washer, or cap as needed. Preferably, the pivot pin 180 selected for use will allow for adjustment of the tension of the fulcrum 150 to allow regulation of the ease of rotating the fulcrum in and out of its active firing position. Depending upon the pivot pin 180 chosen for attachment, it is possible that tension may be set and reset by the use of thumbscrew heads, allen wrenches or screw drivers.
As best shown in
However, a longitudinal slot 170 is not required if adequate space exists between the trigger bottom end 111 and the fulcrum 150 to allow the trigger bottom end 111 to avoid engagement of the fulcrum 150 as it travels over the fulcrum 150 when the fulcrum 150 is positioned in the passive off position. In order to ensure adequate space exists, it is permissible to modify the lever 110 by enlarging the trigger guard 112 and spacing the trigger guard farther away from the trigger 108, to shorten the trigger 108, or both. The fulcrum 150 may be shaped in any shape which allows for mounting on the trigger guard 112 (
The left tab 172 and right tab 274 of fulcrum 250 extend outwardly at an angle from the lower portion of said left side 160 and said right side 262, respectively, at said fulcrum back end 254. The fulcrum 150, 250 may have only a left tab 172 as shown in
If the fulcrum 150 is left in the forward rotated position as shown in
As shown in
If the rifle 101 has a cross-bolt safety, and the cross-bolt safety is placed in a non-firing position, the rifle 101 will not fire when the trigger 108 is pulled manually or actuated by the gun trigger actuator 130 of the present invention. Therefore, the rifle 101 can be cocked repeatedly, safely emptying the magazine 22 without firing the rifle 101, even if the gun trigger actuator 130 is in the active firing mode.
The foregoing detailed description is given primarily for clearness of understanding and no unnecessary limitations are to be understood therefrom for modifications can be made by those skilled in the art upon reading this disclosure and may be made without departing from the spirit of the invention and scope of the appended claims.
Claims
1. A gun trigger actuator for a lever action rifle having a trigger having a trigger bottom end, a lever having a trigger guard and a finger portion, and a receiver, comprising a fulcrum which can rotate between a trigger engaging position and a passive position.
2. The gun trigger actuator as recited in claim 1, where said fulcrum has a front end, a back end, a top face, a bottom face, a left side, and at least one aperture toward said front end.
3. The gun trigger actuator as recited in claim 1, further comprising at least one pivot pin.
4. The gun trigger actuator as recited in claim 2, further comprising at least one pivot pin, where said at least one pivot pin is received by said aperture, extends at least partially through the trigger guard portion of the lever, and rotatably secures said fulcrum to the trigger guard portion.
5. The gun trigger actuator as recited in claim 4, where said at least one aperture further comprises a first aperture and a second aperture, said first aperture located on said fulcrum left side, said second aperture located on said fulcrum right side, and where said at least one pivot pin extends completely through said lever and is received by said first aperture and said second aperture.
6. The gun trigger actuator as recited in claim 1, where said fulcrum is shaped to allow rotation of said fulcrum on said trigger guard.
7. The gun trigger actuator as recited in claim 1, further comprising a trigger shim, where said trigger shim is installed in the rifle receiver immediately adjacent and forward of the trigger.
8. The gun trigger actuator as recited in claim 2, where said fulcrum has a longitudinal slot in said top face, said longitudinal slot extending towards said front end and said back end.
9. The gun trigger actuator as recited in claim 8, where said longitudinal slot is sized to allow the trigger bottom end to easily travel through said longitudinal slot when rearward pressure is applied to said trigger.
10. The gun trigger actuator as recited in claim 1, where the trigger bottom end is spaced above said fulcrum and travels over said fulcrum when rearward pressure is applied to said trigger.
11. The gun trigger actuator as recited in claim 2, where said fulcrum has at least one tab extending outwardly at an angle towards said fulcrum back end.
12. The gun trigger actuator as recited in claim 7, where said trigger shim minimizes unnecessary forward movement of the trigger and holds the trigger in a rearward position.
13. The gun trigger actuator as recited in claim 12, further comprising a pivot pin, where said fulcrum has a front end, a back end, a top face, a bottom face, a left side, and at least one aperture toward said front end, and where said fulcrum is mounted on the trigger guard below the trigger bottom end in a passive position, said front end rotatably secured by said pivot pin forward of the trigger bottom end, and said back end extending rearwardly along and above said trigger guard.
14. The gun trigger actuator as recited in claim 13 where when said fulcrum is in said passive position, the rifle may be fired by manually applying rearward pressure to the trigger.
15. The gun trigger actuator as recited in claim 13, where said fulcrum rotates on said pivot pin to an active position where said fulcrum back end extends upward at an angle forward of said trigger bottom end.
16. The gun trigger actuator as recited in claim 15 where when said fulcrum is in said active position and the lever is in a closed position, said bottom face is in contact with said trigger and said fulcrum exerts rearward pressure on said trigger.
17. The gun trigger actuator as recited in claim 16, where when said fulcrum is in said active position, said rearward pressure on the trigger exerted by said fulcrum causes the rifle to fire.
18. The gun trigger actuator as recited in claim 17, where when said fulcrum is in said active position, the rifle may be fired by closing the lever.
19. In a gun trigger actuator for a lever action rifle having a trigger having a trigger bottom end, a lever having a trigger guard and a finger portion, and a receiver, the improvement which comprises: a fulcrum which can rotate between a trigger engaging position and a passive position.
20. The gun trigger actuator as recited in claim 19, further comprising a trigger shim, where said trigger shim is installed in the rifle receiver immediately adjacent and forward of the trigger.
Type: Application
Filed: Jan 20, 2004
Publication Date: Aug 25, 2005
Inventor: Samuel Speaks (Union Star, KY)
Application Number: 10/762,130