Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-06-30
1978-05-23
Griffin, Robert L.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
325396, 343225, H04B 700
Patent
active
040913287
ABSTRACT:
A system for individually adjusting a plurality of remotely located servo units according to the position of a manual control for each servo unit by broadcasting a carrier wave that is switched on and off for division into repeating sequences with the reset signal to repeat a sequence having a short broadcast duration followed by a long silent period and in which the shifting of the control from one servo unit to the next in a sequence is directed by the leading edge of a broadcast period that occurs in a sequence for each servo unit and which is of the same duration as the reset broadcast signal to thereby decrease the total broadcast time for each sequence while also reducing the possibility of interference by extraneous signals.
REFERENCES:
patent: 2788476 (1957-04-01), Shaw
patent: 3257651 (1966-06-01), Fzisel
patent: 3806939 (1974-04-01), Palmieri
patent: 3858116 (1974-12-01), Friedl et al.
"Heath kit Assembly Manual", 5-Channel Digital Proportional Radio Control System, Model GD-19, 1969, pp. 102-117.
French Douglas M.
Hellman Robert R.
Griffin Robert L.
Junkins Ernest M.
Ng Jin F.
Westport International, Inc.
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