Locking system for a double hung window

Details Locking system for a double hung window Locking system for a double hung window

E - Fixed Constructions

05

C

E05C 17/60 (2006.01) E05B 65/08 (2006.01) E05C 17/64 (2006.01)

Patent

CA 2130052

An apparatus for selectively securing a window sash to a win- dow frame, including a longitudinally extending jamb liner secured to the frame adjacent one side of the sash, and a movable cam between the frame and the liner for selectively adjusting the spacing therebetween. Frictional locking surfaces are provided between the liner and the sash whereby the cam in a locking configuration biases the liner away from the frame and thereby against the sash to frictionally lock the sash against movement relative to the liner. The liner defines a portion of the track guiding the sashfor substantially planar movement and the cam may also be selectively moved to a releasing configuration allowing the liner to sufficiently approach the frame to allow the sash to be cleared from the liner. The cam prefera- bly includes a first set of cam members resiliently secured to the liner at spaced positions along its length, and a second cooperating set of cam members is movable to selectively adjust the overall lateral dimension of the cooperating cam members in the space between the liner and the frame.

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