Self-shut type lock device

Details Self-shut type lock device Self-shut type lock device

1980-08-25

1983-08-23

Wolfe, Robert L.

Locks

Operating mechanism

Key

70419, 70421, E05B 1514, E05B 2702

Patent

active

043996744

ABSTRACT:
A self-shut type lock device comprising a self-shut protector provided in the keyhole capable of hiding the lower tumbler segments from being picked through the keyhole.

REFERENCES:
patent: 2022070 (1935-11-01), Williams
patent: 2032974 (1936-03-01), Bradshaw
patent: 2049548 (1936-08-01), Swanson
patent: 4083210 (1978-04-01), Bergin

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