Baths – closets – sinks – and spittoons – Flush closet – wash receptacle – and bathtub or shower
Patent
1989-04-21
1991-01-15
Sholl, Linda J.
Baths, closets, sinks, and spittoons
Flush closet, wash receptacle, and bathtub or shower
4304, 4313, 4623, 4596, A47K 400
Patent
active
049843141
ABSTRACT:
A system for controlling liquid flow in bathrooms and the like in response to the presence of the user, which is configuration-adjustable to permit use in preselected sanitary applications. A light emitting device cooperates with a light sensor to detect light reflected from the user. The filtered and amplified output signal from the sensor is demodulated to provide a DC output signal. A first circuit is responsive to the DC output signal acutate fluid flow for a maximum preselected period, to enable use in controlling faucet flow. A second circuit is responsive to the DC signal and includes a device for arming the circuit following the existence of the DC output signal for a first predetermined period; and a device for thereupon generating a flow control signal for a second predetermined period following extinction of the DC output signal to enable use of the system to control flushing of urinals or commodes. A third circuit is responsive to the DC output signal provide a flow control signal during the existence of said DC output signal, to enable the system to be used for control of shower flow and includes a device for initial adjustment of water temperature. Configuration selection, adjustable at installation of the system, enables the installer to configure the system to provide the DC output signal to one of the first, second or third circuits.
REFERENCES:
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patent: 4651777 (1987-03-01), Hardman
patent: 4682628 (1987-07-01), Hill
Sholl Linda J.
Water-Matic Corporation
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