Communications: electrical – Continuously variable indicating – With meter reading
Patent
1987-02-06
1989-05-30
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340825720, 340825630, 340825640, H04Q 700
Patent
active
048355313
ABSTRACT:
An automobile remote-control system is disclosed. This system is characterized such that: a transmitter includes a carrier oscillating circuit for oscillating a carrier with a frequency higher than a radio broadcasting frequency band or a telephone transmitting-and-receiving frequency band; an operation voltage of this carrier oscillating circuit is turned ON/OFF by a drive control circuit; the carrier oscillating circuit is turned ON for a preset period prior to the transmission of the code thereby to transmit a leader pulse signal; the carrier oscillating circuit is subsequently turned ON in a pulse-like configuration at an interval corresponding to the code thereby to transmit a code pulse signal; a receiver receives the signal from the transmitter through a radio receiving antenna or a telephone transmitting-and-receiving antenna; the receiver is kept in an operation-state by a periodic operation control circuit at a cycle shorter than a continuance time of the leader pulse signal; when the leader pulse signal is detected by a detecting circuit, the receiver is held in the operation-state by an operation holding circuit; and the code pulse signal is converted into a code in accordance with a pulse interval by a code converting circuit.
REFERENCES:
patent: 3611156 (1971-10-01), Ward
patent: 4081747 (1978-03-01), Meyerle
patent: 4142177 (1979-02-01), Davis
patent: 4171468 (1979-10-01), Reiner
patent: 4251812 (1981-02-01), Okada et al.
patent: 4380762 (1983-04-01), Capasso
patent: 4506386 (1985-03-01), Ichikawa et al.
patent: 4511887 (1985-04-01), Fiore
Alps Electric Co. ,Ltd.
Ogonowsky Brian D.
Shoup Guy W.
Winters Paul J.
Yusko Donald J.
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