Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-08-12
2000-08-15
Lieu, Julie
Communications: electrical
Condition responsive indicating system
Specific condition
340650, 340638, G08B 2100
Patent
active
061043028
ABSTRACT:
A fuse protected power supply circuit for a sensor-operated solenoid controls plumbing fixtures such as automatically-operated faucets, automatically-operated flush valves, hand dryers, soap dispensers and the like. The circuit includes two automatically resettable fuses, one to protect the power supply circuit if the AC-operated solenoid should short and a second to protect the power supply circuit in the event that the sensor which detects the presence of a user of the plumbing device should short. The automatically resettable fuses provide a simple and reliable troubleshooting method in that replacement of either the sensor or the solenoid, depending upon whether one or both are in a shorted condition, allows the circuit to return to normal operation. Such troubleshooting may be undertaken by a maintenance person without the need of sophisticated electronic meters or similar troubleshooting devices.
REFERENCES:
patent: 6020811 (2000-02-01), Saito et al.
Lieu Julie
Sloan Valve Company
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