Remote reading thermostat

Details Remote reading thermostat Remote reading thermostat

1988-10-24

1989-09-05

Crosland, Donnie L.

Communications: electrical

Systems

Selsyn type

340310A, 340501, 34087002, 34082555, 236 1B, H04M 1104

Patent

active

048642746

ABSTRACT:
An information transmission system using a pair of transmission interconnections to supply power from a collection station to an operating station, and to transmit information back based on the collection station providing a changing voltage on the two interconnections and the operating station modulating the amount of current drawn about a reference current to represent information.

REFERENCES:
patent: 3614318 (1971-10-01), Klose
patent: 3922492 (1975-11-01), Lumsden
patent: 4363121 (1982-12-01), Schlyter
patent: 4520488 (1985-05-01), Houvig
patent: 4540890 (1985-09-01), Gangemi et al.
patent: 4607247 (1986-08-01), Sterling, Jr. et al.
patent: 4737657 (1988-04-01), Jatko et al.

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