Security lock for double-hung window

Details Security lock for double-hung window Security lock for double-hung window

1988-02-10

1989-04-25

Dorner, Kenneth J.

Closure fasteners

Braces

292 67, E05C 1744

Patent

active

048241547

ABSTRACT:
A security lock for a double-hung sash window assembly which is to be mounted on a stile of one of the sash frames to limit movement of the second sash frame relative to the one sash. The lock includes a casing adapted to be mounted within one of the sash frames, a faceplate of the casing having an opening therein communicating with an interior casing cavity. A tumbler pivots in the cavity and is spring biased to normally project through the opening to engage the second sash. A leaf spring is mounted within the casing cavity normally to bias the tumbler into its locking position, but permitting the tumbler to be retracted into the casing. The lock can be supplied as an assembled unit for installation.

REFERENCES:
patent: 534185 (1895-02-01), Winchester
patent: 1077487 (1913-11-01), Miller
patent: 1190519 (1916-07-01), Creager et al.
patent: 1656818 (1928-01-01), Dillon
patent: 1724637 (1929-08-01), Bergstrom
patent: 2610849 (1952-09-01), Young
patent: 3015511 (1962-01-01), Sitterly

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