Electrically programmable transceiver security system and integr

Details Electrically programmable transceiver security system and integr Electrically programmable transceiver security system and integr

1987-04-15

1989-08-22

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340531, 34082544, 3408255, G08B 108, H04Q 700

Patent

active

048599905

ABSTRACT:
An electrically programmable security system includes a receiver responsive to particular radio frequency signals which include a predetermined digital code encoded on the radio frequency signal. The receiver generates a control signal upon detecting the presence of the encoded radio frequency signal. The receiver also includes a circuit for digitally communicating the predetermined digital code on a communication link. A transmitter includes a memory for storing a digital code and a circuit for generating a radio frequency signal at the radio frequency to which said receiver is responsive. The radio frequency signal generated by the transmitter is encoded with the digital code stored in the memory. The transmitter further includes a circuit for coupling with the communication link and a circuit for inputting the predetermined digital code from the receiver unit communicated on the communication link into the memory when the communication link is coupled to the coupling circuit.

REFERENCES:
patent: 3579221 (1971-05-01), Ashley et al.
patent: 4296408 (1981-10-01), Neuringer
patent: 4422071 (1983-12-01), de Graaf
patent: 4442426 (1984-04-01), Heuschmann et al.
patent: 4535333 (1985-08-01), Twardowski
patent: 4568930 (1986-02-01), Livingston et al.

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