Valves and valve actuation – Electrically actuated valve – Remote or follow-up control system for electrical actuator
Patent
1992-07-02
1993-10-12
Rivell, John
Valves and valve actuation
Electrically actuated valve
Remote or follow-up control system for electrical actuator
4304, 4305, 4DIG3, E03D 1300
Patent
active
052518728
ABSTRACT:
There is provided an automatic cleaner for a male urinal comprising: a sensor such as pyroelectric sensor, etc. for detecting that a human body comes close to the urinal or away therefrom to output a first signal, an one-shot multivibrator circuit of the retriggerable type triggered in response to the outputted first signal to output a second signal for a predetermined time, an infrared ray emitting circuit adapted for emitting infrared rays in the form of pulse for a time period during which the one-shot multivibrator circuit is outputting the second signal, and an infrared ray receiving circuit adapted for detecting that the emitted infrared rays are reflected by the human body to output a third signal in the form of pulse. This automatic cleaner further comprises a circuit responsive to the outputted third signal to trigger the one-shot multivibrator circuit independently of said first signal, a drive circuit adapted for counting the number of the outputted third signals to output a drive signal when the count value reaches a predetermined number of times, and there results the state where the third signal is not outputted, and a cleaning water control unit responsive to the drive signal to allow cleaning water to flow out.
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Rivell John
Uro Denshi Kogyo Kabushiki Kaisha
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