Mechanical guns and projectors – Element – Trigger or releasing mechanism
Patent
1982-09-29
1984-10-30
Apley, Richard J.
Mechanical guns and projectors
Element
Trigger or releasing mechanism
F41B 500
Patent
active
044794800
ABSTRACT:
A crossbow trigger mechanism is provided having three mechanically operable lever elements designated as a string holding cylinder, trigger lever and a locking lever. These three lever elements are mounted for pivotable rotation in a substantially common plane about parallel axes. Their axes are relatively positioned such that a mechanical interlock is formed between the cylinder and trigger lever when the cylinder is in a string holding position to prevent release of a string and between the trigger lever and locking lever when the locking lever is in a locking position with respect to the trigger lever to prevent the trigger lever from being moved. A torsion spring is provided and interconnected between the locking lever and trigger lever to provide a biasing force for rotation of the locking lever in either direction dependent upon whether the lever is in a locked position or an unlocked position. The cylinder and locking lever are positioned and mutually configured to cooperatively interengage during rotation of the cylinder in release of a bowstring to initiate return of the locking lever to its locked position. The torsion spring completes return of the locking lever to its locked position when a bowstring is again placed in restrained relationship on the string holding cylinder or by revolving the cylinder to its string holding position as an automatic consequence of that cocking operation.
REFERENCES:
patent: 1469610 (1923-10-01), Ustynik
patent: 2842114 (1958-07-01), Duncan
patent: 4004564 (1977-01-01), Castonguay
patent: 4192281 (1980-03-01), King
Apley Richard J.
Browne William R.
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