Lock for casement windows

Details Lock for casement windows Lock for casement windows

1982-11-03

1986-09-09

Smith, Gary L.

Closure fasteners

Bolts

Multiple

292241, 292DIG35, 292DIG47, 292DIG62, E05C 304

Patent

active

046104720

ABSTRACT:
An improved casement window securement mechanism includes two cams, one handle, cam linkage and a cam and linkage supporting spacer. The spacer supported cam is a reaching cam including a cam ramp with a straight drawing portion, and cam center and over-center portions. The reaching cam draws a catch at a rate varying with the cam angle of rotation. The securement mechanism draws and positively secures a bowed or warped casement sash.

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patent: 2789851 (1957-04-01), Lickteig
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patent: 2831718 (1958-04-01), Hallek et al.
patent: 2944864 (1960-07-01), Krivulka
patent: 4003614 (1977-01-01), Geer et al.

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