Single action vent stop

A vent stop for use with a first sash member and a second sash member, wherein said first sash member slides with respect to said second sash member, wherein the vent stop comprises:

• a housing adapted to be disposed in a recess in said second sash member, said housing formed by a face plate, a front wall, a rear wall, and first and second sidewalls, said front and rear walls and said sidewalls extend from said face plate to thereby define a housing cavity;
• a tumbler that is pivotally mounted in said housing cavity, said tumbler including an apex which protrudes from said housing cavity when said tumbler is rotated from a retracted position to an extended position;
• said tumbler being biased by a spring which biases the tumbler toward a partially extended position and the extended position, and wherein when said tumbler is in a partially extended position said tumbler permitting said first sash member to slide over said tumbler when said first sash member moves from a first position to a second position, said movement thereby causing said tumbler to be retracted further into said housing, thereby releasing said tumbler, and wherein, when said first sash returns to said first position said tumbler being in a fully extended position whereby said first sash is being prevented by said tumbler from moving past said tumbler as said first sash is moved from said first position.

A security lock for use in a sash window assembly having upper and lower sash window frames installed for vertical sliding movement, said upper sash frame having a recess into the interior thereof, said security lock comprising:

• a casing adapted to be disposed in said recess, said casing including a cavity with a back wall therein;
• a tumbler disposed in said cavity, said tumbler including a protruding apex at the top thereof;
• pivot means for pivotally securing said tumbler to said casing for movement between an extended position where an edge of said tumbler overlies the top of the lower sash to prevent upward movement of the lower sash above the edge of said tumbler, a partially retracted position wherein said lower sash forces said tumbler further into said housing as said lower sash passes over said partially retracted tumbler a spring means for biasing said tumbler into said extended position.

A vent stop for use in a sliding member comprising a housing, a spring and a tumbler, said tumbler being rotatably mounted in said housing and having a fully extended position wherein a portion of said tumbler extends from said housing then when said tumbler is in its fully extended position and wherein said spring causes said tumbler to be released from said partially extended position to a fully extended position when said tumbler is moved to a more retracted position in said tumbler.