Door locking system

Details Door locking system Door locking system

1985-09-27

1987-01-20

Holko, Thomas J.

Locks

Operating mechanism

Combination or key

70214, 70129, 70156, E05B 3700

Patent

active

046372377

ABSTRACT:
A combination lock system on a narrow stile door having selective operation through a drive mechanism including a slide for retraction of the latch bolt operated by the combination lock and a manual control or key operation of the latch bolt. The key operation provides an override of the combination lock operation.

REFERENCES:
patent: 744858 (1903-11-01), Durnbaugh
patent: 1113193 (1914-10-01), Carroll
patent: 1309438 (1919-07-01), Keefer
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patent: 2769652 (1956-11-01), Maurits et al.
patent: 3073143 (1963-01-01), Eads
patent: 3115765 (1963-12-01), Fengler
patent: 3353383 (1967-11-01), Fish
patent: 3529454 (1970-09-01), Fish
patent: 3747377 (1973-07-01), Van Deudekom
patent: 3828592 (1974-08-01), Horgan, Jr.
patent: 3981164 (1976-09-01), Balducci
patent: 4027508 (1977-06-01), McGourty
patent: 4459835 (1984-07-01), Hurskainen

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