Timeswitches

Details Timeswitches Timeswitches

1988-03-28

1989-07-25

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307140, 34082522, 364493, 364145, H01H 4300, G08B 500, G05B 1101

Patent

active

048517089

ABSTRACT:
A programmable timeswitch comprises a microcontroller and a switching relay for controlling the supply of electricity to electrical apparatus in accordance with a predetermined `yearly` program stored in an EPROM. The yearly program can include different daily programs for weekdays and weekends and includes different seasonal programs to take account of different demands for electricity at different times of the year. The timeswitch is programmed to switch automatically from one seasonal program to the next seasonal program on predetermined dates in the year and so does not have to be re-programmed at intervals throughout the year. The timeswitch may be used as part of a `deferable load program` run by a utility in which a large number of timeswitches are supplied to different installations, the timeswitches having been programmed by a master console under the sole control of the utility.

REFERENCES:
patent: 3940660 (1976-02-01), Edwards
patent: 4293915 (1981-10-01), Carpenter et al.
patent: 4357665 (1982-11-01), Korff
patent: 4418333 (1983-11-01), Schwarzbach et al.
patent: 4573127 (1986-02-01), Korff
patent: 4668878 (1987-05-01), Wyss
patent: 4672232 (1987-06-01), Schoen
patent: 4719364 (1988-01-01), Pequet et al.

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