Extension unit for door lock

Details Extension unit for door lock Extension unit for door lock

1988-10-04

1990-07-10

Smith, Gary L.

Closure fasteners

Bolt casings

292 1, E05B 900

Patent

active

049402692

ABSTRACT:
An extension unit for a door lock in which it is possible to readily change the backset of the door lock unit to accommodate standard backsets of 23/8 inches and 23/4 inches. The extension unit comprises an extension element, a connector element and a housing element, all of which, in combination, permit the backset to be easily and readily changed.

REFERENCES:
patent: 2250036 (1941-07-01), Schlage
patent: 2299181 (1942-10-01), Schlage
patent: 2674481 (1954-04-01), Russell et al.
patent: 2776155 (1957-01-01), Gerlach
patent: 3046042 (1962-07-01), Kane
patent: 3190638 (1965-06-01), Schlage
patent: 3300240 (1967-01-01), Tornoe et al.
patent: 4372594 (1983-02-01), Gater
patent: 4729586 (1988-03-01), Fang
patent: 4744232 (1988-05-01), Shen

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