Locks – Operating mechanism – Key
Patent
1974-10-23
1976-10-05
Frazier, Roy D.
Locks
Operating mechanism
Key
70383, E05B 3512
Patent
active
039837289
ABSTRACT:
A changeable combination key lock for safe deposit boxes and the like, wherein a guard key is insertable into a rotatable guard key plug to set guard key tumblers to permit retracting movement of a bolt, and a renter's key is insertable into a rotatable renter's key plug for engagement with renter's key tumblers to aline them to permit retraction of the bolt. Both the renter's key tumblers and the guard key tumblers are releasable from gate members carried by the bolt and may be set for key configuration for a new renter's key and a new guard key, or either of them, when the lock is conditioned in a change mode to permit adjustment of the lock to operate with different guard keys and renter's keys.
REFERENCES:
patent: 690537 (1902-01-01), Taylor
patent: 1125343 (1915-01-01), Klohs
patent: 1259353 (1918-03-01), Brintnall
patent: 1384179 (1921-07-01), Christoph
patent: 1522573 (1925-01-01), Benham
patent: 1693731 (1928-12-01), Sioberg
patent: 1826595 (1931-10-01), Benham
patent: 2221664 (1940-11-01), Susser
patent: 2832211 (1958-04-01), Saarento
patent: 3514982 (1970-06-01), Bergendahl
patent: 3772904 (1973-11-01), Parrock
patent: 3837196 (1974-09-01), Gartner et al.
Frazier Roy D.
Holko Thomas J.
Sargent & Greenleaf, Inc.
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