Communications: electrical – Systems – Call station
Patent
1975-07-14
1977-09-20
Pitts, Harold I.
Communications: electrical
Systems
Call station
340149A, 340147MD, 70278, H04Q 300
Patent
active
040500632
ABSTRACT:
A key-actuated electronic lock system for auto ignitions including a conventional auto ignition key-lock combination. Electronic lock actuating information is stored on the key and the lock supports a transducer for sensing the information stored on the key as it is inserted into the lock and for generating a coded electric signal indicative of the lock actuating information for application to a control secured in a locked compartment remote from the ignition lock. Within the control, the coded signal is compared with programmable coded information stored in the control and indicative of the electronic lock actuating information. A match of the information actuates circuitry for applying electric power to the auto ignition and auto accessories as desired including a lock to the locked compartment. The control includes a time delay lock out preventing unauthorized pulse code generator input from operating the system and over voltage protection devices for preventing a voltage override of the system. An auxiliary circuit allows operation of the auto ignition only by a standard mechanically coded ignition key after a combined closing of an auxiliary permit switch and actuation of the auto ignition lock with the electronically coded key.
REFERENCES:
patent: 3165599 (1965-01-01), Clay
patent: 3415087 (1968-12-01), Krasmasz
patent: 3500326 (1970-03-01), Benford
patent: 3587051 (1971-06-01), Hovey
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