Self-contained security lock for double-hung window

Details Self-contained security lock for double-hung window Self-contained security lock for double-hung window

1989-08-18

1990-05-08

Moore, Richard E.

Closure fasteners

Bolts

Sliding and swinging

292DIG47, 292338, E05C 1750

Patent

active

049232304

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 a recess formed in 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 completely 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: 417868 (1889-12-01), Jones
patent: 614741 (1898-11-01), Moore
patent: 1249176 (1917-12-01), Newman
patent: 1862056 (1932-06-01), Kelly
patent: 1946833 (1934-02-01), Brown
patent: 2615742 (1952-10-01), Lloyd
patent: 2681819 (1954-06-01), Burke
patent: 2920914 (1960-01-01), Jenkins
patent: 4322458 (1982-04-01), Eigemeier
patent: 4655489 (1987-04-01), Bishing
patent: 4824154 (1989-04-01), Simpson

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