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US 4,391,057 AGranted
Actuator system for the return of the trigger in double-action revolvers
AssigneeForjas Taurus S/A
InventorJose C. M. Bornancini
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AssigneeForjas Taurus S/A
InventorJose C. M. Bornancini
Estimating the term…
An actuator system for the trigger return in double-action revolvers includes an actuating rod having a rounded end engaged in a recess in the trigger with a helical coiled return spring biasing the rod by means of a cylindrical shoulder thereon and a rotary abutment member having a bore, which bore serves as a guide for the axially shiftable rod. The system provides an improved double-action operation since it compensates for the increasing reaction of the spring by reducing the lever arm or moment of this reaction on the trigger during its rearward movement. An improvement enables the user to control the "trigger weight" in a single-action operation by the provision of a return spring control bushing which can be adjustably threaded in the rotary abutment member to vary the effective operating length of the spring.
A trigger return actuator mechanism for a double-action revolver having a hammer and trigger pivotally supported within a frame, a hammer rod provided with a mainspring and engaging said hammer, said mechanism including an actuating rod provided with a forward end bearing against said trigger, an abutment member within said frame having a bore therethrough, said actuating rod having a rear end slidably disposed through said bore, said abutment member mounted within said frame for rotary displacement about a fixed transverse axis, and spring means biasing said actuating rod forward end away from said abutment member and toward said trigger.
A trigger return actuator mechanism for a double-action revolver having a hammer and trigger pivotally supported within a frame, including an actuating rod provided with a forward end bearing against said trigger, an abutment member within said frame having a bore therethrough, said rod having a rear end slidably disposed through said bore, said abutment member mounted within said frame for rotary displacement, spring means biasing said rod forward end away from said abutment member and toward said trigger, said rotary abutment member including a shiftable control bushing containing said rod bore and one end of said spring means engages said shiftable bushing whereby, shifting of said bushing varies the effective force of said spring means to allow adjustment of the revolver trigger weight.
Dependencies are inferred from the claim text.