Door with magnetically controlled lock

Details Door with magnetically controlled lock Door with magnetically controlled lock

1978-03-01

1980-01-22

Dorner, Kenneth

Locks

Special application

For closures

70276, 70DIG10, 292 39, E05B 6314

Patent

active

041843495

ABSTRACT:
This is a burglar-proof door for apartments or houses and it is held closed by bolts extending from within the door and into sockets in the frame that surrounds the door. The door has hinges, but in the preferred construction there are four bolts, one on each edge of the door so that the door cannot be opened by removal of the pins from the hinges. An electric motor operates, when a magnetically-coded card is inserted in a slot in the outside of the door, to lock or unlock the door when a handle is turned one way or the other. When there is a serious fire in the apartment or the house, a thermostat causes the door to unlock automatically.

REFERENCES:
patent: 199255 (1878-01-01), Bone
patent: 768418 (1904-08-01), Adams
patent: 1633173 (1927-06-01), Freedman et al.
patent: 3581030 (1971-05-01), Sedley
patent: 3975934 (1976-08-01), Babai et al.
patent: 4046410 (1977-09-01), Connell

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