Baths – closets – sinks – and spittoons – Wash receptacles – With proximity operated valve
Patent
1996-12-05
1999-08-31
Fetsuga, Robert M.
Baths, closets, sinks, and spittoons
Wash receptacles
With proximity operated valve
4DIG3, 25112901, E03C 105
Patent
active
059437120
ABSTRACT:
A method for controlling the operation of a water valve in response to the presence of a human body part by providing a passive detecting apparatus to produce a human-presence-indicating signal in response to variation in radiation by the body part, detecting with a first level detector circuit having an input coupled to the passive detecting apparatus whether the human-presence-indicating signal is between a first upper threshold level and a first lower threshold level, producing with a first circuitry responsive to the first level detector circuit a first active mode signal if the human-presence-indicating signal is either higher than the first upper threshold level or lower than the first lower threshold level, opening the water valve with a second circuitry responsive to the first active mode signal, after production of the first active mode signal, further detecting with a second level detector circuit more sensitive to the presence of a human body part than the first level detector circuit and having an input coupled to the passive detecting apparatus whether the human-presence-indicating signal provided by the passive detecting apparatus is between a second upper threshold level and a second lower threshold level, further producing with a third circuitry responsive to the second level detector circuit a passive mode signal if the human-presence-indicating signal is between the second upper threshold level the second lower threshold level, and closing the water valve with a fourth circuitry responsive to the passive mode signal.
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Fetsuga Robert M.
International Sanitary Ware Manufacturing Cy, S.A.
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