Electronic keylock system

Details Electronic keylock system Electronic keylock system

1989-04-13

1990-01-02

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

70278, 2353825, 361172, H04Q 100, H04Q 302

Patent

active

048916366

ABSTRACT:
An electronic keylock system comprises a key which includes a precision resistance, a receiver for receiving the key, an analog-to-digital converter coupled to the receiver for measuring the resistance of the precision resistance of the key, circuitry for controlling the analog-to-digital converter, decoding logic for receiving data from the analog-to-digital converter and decrypting the data to provide information with respect to the type of key applied to the receiver, and circuitry for controlling the decoding logic. Two system embodiments are disclosed, one of which employs separate components, and the other of which employs a microcontroller combining several functions.

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