Double cylinder lock bolt assembly

Details Double cylinder lock bolt assembly Double cylinder lock bolt assembly

1977-03-28

1978-08-01

Hafer, Robert A,

Locks

Special application

For closures

70156, E05B 6314

Patent

active

RE0297127

ABSTRACT:
Double cylinder door lock which operates a ceiling- and/or floor-socketed lock bolt which can be added to inner face of already hanging door. Either or both operating cylinders can be key-operated pin tumblers.

REFERENCES:
patent: 750285 (1904-01-01), Johnson
patent: 1189991 (1916-07-01), Mugler
patent: 2772554 (1956-12-01), Schacht
patent: 2920474 (1960-01-01), Johns
patent: 3086383 (1963-04-01), Scott
patent: 3670537 (1972-06-01), Horgan
patent: 3759074 (1973-09-01), Prahl

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