Locks – Special application – For closures
Patent
1979-01-15
1981-10-20
Lyddane, William E.
Locks
Special application
For closures
70150, 292150, 29216918, E05B 5900
Patent
active
042953499
ABSTRACT:
A door lock comprises a latch and a mechanism for locking the latch which includes a pivotal element having at least one arm engageable with the latch to withdraw it to the open position a locking bolt depressable to move into a blocking position to prevent to swivel the pivotal element to withdraw said latch, and a key-operable unlocking lever for moving the locking bolt out of the blocking position to permit to swivel said pivotal element, the lever having a catch operable by the key.
REFERENCES:
patent: 2164290 (1939-06-01), Hurd
patent: 2220591 (1940-11-01), Voight et al.
patent: 3895505 (1975-07-01), Wasserfaller
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