Locking device

Details Locking device Locking device

1979-05-30

1982-02-23

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

70413, E05B 2700

Patent

active

043171567

ABSTRACT:
A locking device includes a key having a locking code and a device for reading the locking code on the key and comparing it with a predetermined locking code. The key has a grip portion and an elongated information carrier extending outwardly from the grip portion. The key is insertable into an opening in the reading device. Magnetic information elements are provided along the information carrier and reading elements in the reading device read the information elements when the key is inserted. A projection extends outwardly from the information carrier transversely of its elongated direction. An information element is located on the projection and a corresponding reading element is provided within the reading device. The dimension of the projection outwardly from the information carrier is such that only the information element located on the projection can excite its corresponding reading element.

REFERENCES:
patent: 2882455 (1959-04-01), Ferguson, Jr.
patent: 3111834 (1963-11-01), Felson
patent: 3416336 (1968-12-01), Felson
patent: 3421348 (1969-01-01), Hallman
patent: 3584484 (1971-06-01), Hallmann
patent: 4232353 (1980-11-01), Mosciatti et al.
PCT WO79/00639, Herriot, et al., 9/1979.

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