Remote control system

Details Remote control system Remote control system

1986-01-21

1988-01-26

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082506, 34082577, 307464, G05B 2302, G08C 1900, H03K 1923

Patent

active

047219530

ABSTRACT:
Remote-control system comprising a main unit and, connected at a distance via a pair of conductors to the main unit, an operating unit which comprises a series circuit of a number of diodes connected between the conductors of the conductor pair, a number of switches connected parallel to one or more of the diodes, and a signalling circuit. The main unit provides signalling corresponding to the certain current. In particular the certain current is determined by the state of the switches.

REFERENCES:
patent: 3702473 (1972-11-01), Fink
patent: 3708784 (1973-01-01), Spencer
patent: 3932714 (1976-01-01), Guimier et al.
patent: 4017832 (1977-04-01), Gilbert
patent: 4086570 (1978-04-01), Wakasa et al.
patent: 4136333 (1979-01-01), Sumida et al.
patent: 4427904 (1984-01-01), Imazeki et al.
patent: 4575718 (1986-03-01), Ludowyk
patent: 4580138 (1986-04-01), Morrison

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