Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1998-05-28
2000-10-03
Lee, John R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2503381, 4623, G01S 1702, G01S 7481, E03C 105
Patent
active
061276715
ABSTRACT:
In response to a infrared-radiation sensor assembly (12), a control circuit controls an electromechanical valve (18) in an automatic faucet (16). Reflector surfaces (44, 46) so form a sensor beam as to cause the sensor to be insensitive to the presence of a sink (24). The ratio of the resultant radiation pattern's horizontal extent to its vertical extent is greater than it would be in the absence of the reflector surfaces (44, 46). The control circuit is battery-powered, and the electromechanical valve (18) is of the latching variety so as to conserve the battery's energy.
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Parsons Natan E.
Wu Haiou
Arichell Technologies Inc.
Lee John R.
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