Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits
Patent
1980-01-22
1986-04-01
Dwyer, James L.
Electrical transmission or interconnection systems
Plural load circuit systems
Selectively connected or controlled load circuits
3071418, 219486, H02J 300
Patent
active
045800618
ABSTRACT:
A time switch (100) comprises terminals (110) spaced around a slip ring (108) connected to a voltage source (V). A motor (104) drives a brush (102) to sequentially connect the terminals (110) to the slip ring (108) to energize the terminals in sequence. Each terminal (110)--as shown for one of them designated 112--is connected via a respective transistor (116) and manually operable switch (124) to a pair of common output conductors or bus-bars (130, 132), whereby for each successive period of time corresponding to each successive terminal (110) being energized the conductors (130, 132) are energized in accordance with the setting of a respective one of the switches. Thus, a desired time-varying pattern of energization of the conductors (130, 132) to accomplish a control function, e.g. the control of a central heating system to provide different heat outputs at different times of the day, can be set up at will simply by adjusting the various switches (124).
REFERENCES:
patent: 2805331 (1957-09-01), Wolford
patent: 3586869 (1971-06-01), Kompelien
patent: 3886378 (1976-05-01), Morgan
Operational Amplifiers and Linear Integrated Circuits, Coughlin et al., 1977, pp. 117-118.
Dwyer James L.
Plympton Patents Limited
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