초록 ▼

The sash lock has a rotatable cam which engages the keeper. The sash lock has a slide plate mounted below the cam and the slide plate moves between a retracted position in which its leading edge is flush with the sash to which the lock is mounted. In an extended position in which the leading edge of

The sash lock has a rotatable cam which engages the keeper. The sash lock has a slide plate mounted below the cam and the slide plate moves between a retracted position in which its leading edge is flush with the sash to which the lock is mounted. In an extended position in which the leading edge of the plate extends far enough to block the narrow gap between the sashes. The slide plate is mounted for movement perpendicular to the edge of the sash and parallel to the plane of the top surface of the sash. The slide plate includes an arcuate recess in one side of the plate which is engaged by a pin extending from the rotatable cam. The recess in the slide plate is contoured so that during initial portion of the movement of the cam from its open position toward its locked position, the slide plate does not move. After the cam has moved far enough to engage the keeper, the slide plate moves outward toward the sash to which the keeper is mounted so as to block the gap between the two sashes in the region of the cam. It reduces the chances of a sash lock being forced open.

대표청구항 ▼

[ What is claimed is:] [1.] A sash lock having a housing, a rotating assembly mounted in the housing, the rotating assembly including a handle rotatable in the housing and moveable between open and closed positions, a shaft connected to the handle and rotatable with the handle, a cam connected to th

[ What is claimed is:] [1.] A sash lock having a housing, a rotating assembly mounted in the housing, the rotating assembly including a handle rotatable in the housing and moveable between open and closed positions, a shaft connected to the handle and rotatable with the handle, a cam connected to the shaft, and contoured to engage a keeper, a slide plate mounted to the housing and slidable between a retracted position in which it is within the housing and an extended position in which it projects from the housing, a pin extending from one of the rotating assembly and the slide plate and a recess formed in the other of the rotating assembly and the slide plate, the pin and recess cooperating to drive the slide plate between its retracted and extended positions as the handle moves between its open and closed positions wherein the recess has a shape which causes the slide plate to be stationary during one part of the rotation of the handle as the handle moves between its open and closed positions and which causes the slide plate to move between its retracted and extended positions during another part of the rotation of the handle as the handle moves between its open and closed positions.