Sash lock with signal

摘要

A sash lock comprises a housing, latch member, activator arm, and trigger. The latch member is spring biased to slide from an unlocked position towards a locked position. The activator arm and trigger are pivotally mounted within the housing, with a torsion spring biasing the trigger relative to the activator arm, to cause the activator arm to pivot and contact the latch member. When the latch member is moved to the unlocked position, the biased activator arm engages the latch member to retain it in the unlocked position, while the biased trigger member pivots to have a portion protrude out of the housing. Upon closing the sash member, an angled surface of a keeper contacts a curved surface of the protruding trigger to cause it to counter-rotate and drive the activator arm to disengage from the latch member and automatically permit biasing of the latch member into the locked position.

主权项

1. An automatically re-locking sash lock, said sash lock comprising:
a housing; a latch member, said latch member being slidable within said housing, between a locked position where a portion of a first end of said latch member protrudes from a portion of said housing, and an unlocked position where said protruding portion of said first end of said latch member is retracted into said housing; a biasing means, said biasing means configured to bias said latch member toward said locked position; an activator arm, said activator arm being pivotally mounted within said housing; a trigger member; said trigger member being pivotally mounted within said housing, said trigger member comprising a first arm and a second arm; a torsion spring, said torsion spring configured to bias said trigger member relative to said activator arm, said relative biasing configured to cause said activator arm to rotate and contact a first portion of said latch member, to releasably secure said latch member in said unlocked position; and said relative biasing configured to cause said trigger member to rotate, to drive a portion of said second arm to protrude out from said housing; and said protruding portion of said second arm of said trigger member comprising an angled surface configured to be actuated to cause said trigger member to counter-rotate, to cause said first arm of said trigger member to releasably engage said activator arm to thereby drive said activator arm to counter-rotate and disengage from said first portion of said latch member, for said biasing means to automatically bias said latch member into said locked position.