Photocontrol with radio-controlled timer and a decoder

Details Photocontrol with radio-controlled timer and a decoder Photocontrol with radio-controlled timer and a decoder

2006-08-03

2008-03-18

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140LS

Reexamination Certificate

active

07345270

ABSTRACT:
A photocontrol controls the activation of lighting based on ambient light and the time of day using a radio-controlled timer. Radio signals from a particular source of correct time, such as the National Institute for Science and Technology's WWVB radio broadcast, carry encoded time information that can be decoded by the photocontrol to ascertain the current time on start up and periodically during operation. The correct date and time information is used to synchronize the photocontrol's internal clock so that it can turn the lighting load off or on at specific times of the day in accordance with the user's needs. Thus area, business signage, and security lighting, for example, can be turned off late at night and then back on early in the morning to reduce energy consumption by the lighting during those hours when the lighting is not needed.

REFERENCES:
patent: 4937443 (1990-06-01), Smoot
patent: 6814299 (2004-11-01), Carey
Webpage Energy Saving Products Index—Main Index (article entitled Lightmaster II) from http://energy.tycoelectronics.com (no date indicated).
Webpage Energy Saving Control (article entitle Save 50% On Energy Costs) from http://precisionmulticontrols.com/Energy.html dated Jan. 22, 2006.

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