Automatic control system including a programmable memory with ma

Details Automatic control system including a programmable memory with ma Automatic control system including a programmable memory with ma

1980-04-10

1982-03-16

Gellner, Michael L.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307115, H01H 700

Patent

active

043203108

ABSTRACT:
A programmable memory for the automatic control of a heating or cooling plant over a 24-hour, 7-day or longer cycle comprises a frame with a multiplicity of mutually parallel printed-circuit strips whose major surfaces carry two sets of conductors arrayed in an orthogonal matrix, the strips being overlain by a cover plate with slits for the insertion of jumpers bridging selected conductors at their points of intersection. The conductors of one set are sequentially energized while those of the other set are rapidly scanned to detect an output signal representing a selected time in the program cycle at which a command for a change in thermostat setting is to be emitted. The cycle is established or modified by a program plate superimposable upon the cover plate to block some of its slits and/or to actuate one or more switches correlating the several matrix outputs with respective clock readings different for the various cycles. A single program plate may be reversibly positionable on the cover plate to allow selection of two different cycles; a third cycle may be provided by the exposed cover plate itself.

REFERENCES:
patent: 4164665 (1979-08-01), Berger

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