Electronic timer switch with time tracker

Details Electronic timer switch with time tracker Electronic timer switch with time tracker

1988-08-08

1992-11-03

Pellinen, A. D.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307141, 307116, 364145, 315360, H01H 326, H01H 4300, G05B 1101, H05B 3702

Patent

active

051608537

ABSTRACT:
A programmable timer for turning a light on and off in response to changing sunset, daylight savings time, and other programmable conditions. The programmable timer includes an input device, a microprocessor, and a switch. The input device provides calendar, geographical, and daylight savings information to the microprocessor, which stores the programming information. The microprocessor computes an effective switching time from the stored information. The microprocessor employs program logic that compares the effective switching time to the current time to generate a timing control signal. The timing control signal, in turn, causes the switch to turn a light on and off. In the preferred embodiment, the microprocessor and the switch are included within a housing which mounts on a wall in place of a normal light switch. A liquid crystal display is disposed on a face of the housing to provide a read out of the programming information and of the time of day. The input device is disposed on the face of the housing and includes a key matrix having a plurality of finger settable key type programming switches. Information is programmed by depressing each key while the programming logic is in a particular program mode.

REFERENCES:
patent: Re31848 (1985-03-01), Nilssen
patent: 4213063 (1980-07-01), Jones, Sr.
patent: 4293915 (1981-10-01), Carpenter et al.
patent: 4387420 (1983-06-01), Singhi et al.
patent: 4570216 (1986-02-01), Chan
General Instructions for EC71ST and EC71ST-NE Suntracker.TM. Electronic Lighting Control, country of printing unknown, with print code Dec. 1987, believed to be Dec. 1987.
Spec Data sheet for "SunTracker.TM." Electronic Lighting control for EC71ST and EC72ST Series, printed in the United States, with printing code Sep. 1987 believed to be Sep., 1987.
"A Lighting Controller That Tracks The Sun Automatically," product announcement from Bristol, United Kingdom with dateline Jan. 28, 1986.
"New Products," Energy User News, Mar., 1988.

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