Switch lock installation

Details Switch lock installation Switch lock installation

1985-07-18

1988-03-29

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

2353825, 361172, 70271, 70278, G06F 704, G06K 701, E05B 4900

Patent

active

047346930

ABSTRACT:
For controlling a central locking installation and/or theft alarm of a motor vehicle a switch lock installation is provided which comprises at least one lock with mechanical tumblers for the mechanical locking and unlocking of a door or a bonnet of the motor vehicle. The tumblers form a first key secret. The key which blocks the tumblers carries an electrically, magnetically or optically readable information carrier for a second, operationally variable key secret. A reading device detects the information of the second key secret in a position in which the mechanical tumblers of the lock are released. If the key is moved in the opening direction of the lock, a control circuit compares the information read by the reading device with an ideal information stored in a memory circuit and controls the central locking installation and/or theft alarm accordingly. If the key is moved in the closure direction of the lock, then the information of the second key secret read by the reading device is taken as new ideal information into the memory circuit.

REFERENCES:
patent: 3919869 (1975-11-01), Fromm
patent: 4144523 (1979-03-01), Kaplit
patent: 4274080 (1981-06-01), Brunken
patent: 4280118 (1981-07-01), Brunken et al.

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