Patent ID: 8881443

Claim:
A lock for a firearm with a grip safety, and a sear engageable to a biased hammer in a cocked position and releasable by a trigger, the lock comprising: a housing defining a bore within which a mainspring biasing the hammer is received; a latch rotatably mounted to the housing and having a grip safety arm and a cam follower, the latch having a first rotational excursion with the grip safety arm in engagement with and restricting the grip safety to block movement of the trigger, and an opposed second rotational excursion with the grip safety arm in disengagement from the grip safety to unblock depression of the grip safety and movement of the trigger; and an actuator mounted to the housing and cooperatively linked to the latch, the actuator providing motive force for positioning the latch in the first rotational excursion and the second rotational excursion; a cam in sliding engagement with the housing and having an extended position and a retracted position to selectively engage the cam follower of the latch; a leadscrew assembly cooperatively linking the actuator to the cam, the leadscrew assembly including: a fixed mating nut mounted to the housing; a leadscrew shaft in threaded axial engagement with the mating nut; and a connecting column coupled to a shaft of the actuator and to the leadscrew shaft; wherein a rotary motion of the shaft of the actuator is converted to linear travel of the leadscrew shaft.