Lock-latch set

Details Lock-latch set Lock-latch set

1976-08-23

1978-06-27

Frazier, Roy D.

Locks

Special application

For closures

70349, 70392, E05B 6506

Patent

active

040967166

ABSTRACT:
A rotatable latch member having stop means thereon, a plurality of locking trains of different lengths mounted to engage and disengage the stop means to lock and unlock the latch member, and a shaft assembly selectively operable by a knob or a key having a number of teeth of predetermined length, there being a key tooth for each train, the length of that tooth depending upon the length of its train. Said knob and said key being independently operable to cause all of the locking trains to disengage the stop means to unlock the latch member.

REFERENCES:
patent: 13722 (1855-10-01), Holmes et al.
patent: 874694 (1907-12-01), Miller
patent: 962486 (1910-06-01), Ziron
patent: 1515611 (1924-11-01), O'Connor
patent: 3102412 (1963-09-01), Christopher
patent: 3451704 (1969-06-01), Cothron
patent: 3653238 (1972-04-01), Brugemann
patent: 3890813 (1975-06-01), Cothron
patent: 3922896 (1975-12-01), Kagoura

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