Digital encoder for door operator

Details Digital encoder for door operator Digital encoder for door operator

1976-04-07

1979-02-20

Caldwell, Sr., John W.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340147R, 340167R, 340168R, 325 37, 325 55, 325 64, H04B 700

Patent

active

041410106

ABSTRACT:
A digital radio control system comprising a transmitter for producing a repeating series of width modulated pulses, and a receiver responsive only to a series of predetermined pulse characters to actuate a load device such as a garage door operator. Both the transmitter and the receiver circuits comprise simple counter circuits and switches to define the pulse codes. The receiver counter is clocked by the transmitted pulse series and actuates the output circuit only if it reaches the final counter stage at least once.

REFERENCES:
patent: 2951230 (1960-08-01), Cadden
patent: 3387270 (1968-06-01), Adlhoch et al.
patent: 3397401 (1968-08-01), Winterbottom
patent: 3510780 (1970-05-01), Buehrle
patent: 3513443 (1970-05-01), Andersen
patent: 3582783 (1971-06-01), Hendrickson
patent: 3674937 (1972-07-01), Bellanger
patent: 3768090 (1973-10-01), Williams
patent: 3835454 (1974-09-01), Palmieri et al.
patent: 3906348 (1975-09-01), Willmott

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