Thumb Trigger and Automatic Safety

Since potential human error and other difficulties in manually precisely positioning the firearm sights when pulling the trigger during firing affects accuracy, a thumb trigger is proposed to insure uniform accuracy of position on the target.

The device is suitable for application to all firearms, and has an automatic safety that is released during the act of firing and which is returned to a locked position when the thumb trigger is released.

The primary object of the invention is to provide a thumb trigger which may be applied readily and inexpensively to all firearms. It will be more accurate than a finger trigger on firearms. It will be safer since a person can control his thumb better than his finger, and can see his thumb better on the thumb button than he can see his finger on a finger trigger.

Another object of the invention is to be able to line up the target faster, and more accurately, than with the old mechanism of a finger trigger.

Another object is to provide a push button mechanism having good construction, low cost, and being compact and light in weight.

Another object is that it is a great advantage for handicapped people, that have some fingers missing, if the person has only a thumb on one hand, the person can still use the thumb trigger and automatic safety.

Another object is that it will be less tiresome to push on a button with the thumb than to manually tug on a finger trigger.

Another object is that a person won't have an intermittent jiggling motion associated with the finger trying to find the trigger.

Another object of the invention is the spring loaded safety, the safety automatically goes on when a person moves his thumb off the thumb trigger, so there is no danger of the cartridge being struck by the firing pin and a person doesn't have to remember to put the safety on, since as the push button returns to its normal position the spring loaded safety returns back to its normal position.

The invention will further be described with reference to the accompanying drawing wherein like numbers refer to like parts in the view and wherein:

The FIGURE is a horizontal plan view of a gun according to the invention with parts broken away to show details of the thumb trigger and automatic safety.

Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawing, since the invention is capable of being installed in all new firearms and older models with a little modification, and other embodiments practiced or carried out in various ways. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. The scope of the invention being defined in the claims.

Referring now to the FIGURE, there is shown a device according to the present invention and generally designated by the numeral 10. The device 10 is useful on all firearms to increase the accuracy thereof in hitting a target. The device 10 includes a partially enclosed casing 1, and a bracket 15, welded to casing 1, to provide a holder for push button 19. Shaft 29 is inserted in a through hole in casing 1 and pin 16 keeps shaft 29 from falling out of bracket 15. Push button 19 is welded onto shaft 29 to provide a holder for trigger spring 17. An angle 28 is welded to casing 1 and tube 22 is welded to angle 28 to provide a holder for safety spring 23. Tube 20 is welded to casing 1 to provide a holder for spring 5 which returns large arm 2 back to its normal position after firing striker 26 has struck a cartridge. Large arm 2 has a pin 6 for mounting compression spring 5. Large arm 2 is mounted in two front tabs on casing 1, is pivotably attached via a pivot pin 4, press fitted into the two tabs nearest the barrel 27. Large arm 2 has a clearance hole therein for pivot pin 4 and the pivot point is located near the front end of the device 10. Small arm 3 is mounted for relative movement between two tabs near the center portion of casing 1, is pivotably attached via a pivot pin 9, press fitted into the tabs on casing 1, small arm 3 has a clearance hole therein for pivot pin 9 and the pivot point is located near the center if the device 10.

At the front end of small arm 3 is a roller bearing 7 mounted in place with pin 8 to be press fitted into small arm 3.

The shaft 29 rests on the rear end of small arm 3 within a little groove in small arm 3. A screw 21 and nut 11 are included so as to provide a little adjustment for shaft 29. Shaft 29 also has a pin 12 such that spring 13 can fit around pin 12 when spring 13 is inserted into tube 14 to secure shaft 29 onto small arm 3, when push button 19 is pressed.

At the upper portion of shaft 29 there is a compression spring 17 to make push button 19 return to normal position, after push button 19 has been engaged. Pin 16 is to hold shaft 29 in its normal place, so as not to fall out of bracket 15.

Bracket 15 has a hole therein for shaft 29 to be inserted therethrough, push button 19 can be welded to the end of shaft 29.

The safety 18 is mounted for movement in a horizontal slot 30 in casing 1, and has a lip engaging the underside of push button 19. The safety 18 is assembled by sliding the safety up through the hole for the push button 19, safety spring 23 is inserted into tube 22 and is secured by pin 31 on safety 18.

My thumb trigger and automatic safety has a very neat appearance, all the moving parts are contained in one casing 1, and may be pre-assembled and easily installed in all firearms with only three screws 25, mounting it into stock 24, or it could be welded to barrel 27. The thumb trigger and automatic safety may be used in any position and in any kind of weather, since a person can even push the thumb trigger and automatic safety with mittens on to protect his hands from freezing.