Locks – Systems – Operation and control
Patent
1981-08-14
1984-04-03
Lyddane, William E.
Locks
Systems
Operation and control
70237, 70280, 292DIG3, 292DIG23, 292DIG25, E05B 5300
Patent
active
044400063
ABSTRACT:
A central door-lock system has a plurality of door latches each including a detent displaceable between an open position securing the respective door to the respective doorpost and a closed position permitting the respective door to separate from the respective doorpost, a manual door-opening handle, mechanism including a primary latch member connected to the handle and connectable to the detent and movable between a lock position preventing this handle from displacing the detent between its open and closed positions and an unlock position permitting the handle to displace the detent between the open and closed positions, and a secondary latch member displaceable between a lock position urging the primary latch member into the respective lock position while permitting the primary latch member to move into the respective unlock position, an unlock position permitting the primary latch member to move freely between the respective lock and unlock positions, and an antitheft position positively holding the primary member in the respective lock position. In addition, respective servoactuators for the latches each include an operator linearly displaceable between lock, unlock, and antitheft positions, an actuator element entrainable by the respective operator, connected to the respective secondary latch member, and jointly displaceable therewith between the respective positions, and a reversible electric servomotor and a rack-and-pinion gear train connected between this motor and the respective operator for displacing the respective secondary latch member via the respective actuator element and operator between the respective lock, unlock, and antitheft positions. A central switch is connected to the servomotors for operating same jointly and thereby jointly displacing the secondary latch members between the respective positions.
REFERENCES:
patent: 3520159 (1970-07-01), Swanney
patent: 3653237 (1972-04-01), DuRocher
patent: 4135377 (1979-01-01), Kleefeldt et al.
patent: 4342209 (1982-08-01), Kleefeldt
patent: 4364249 (1982-12-01), Kleefeldt
Dubno Herbert
Kiekert GmbH & Co. Kommanditgesellschaft
Lyddane William E.
Ross Karl F.
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