Circuit for monitoring the operating condition of an electric lo

Details Circuit for monitoring the operating condition of an electric lo Circuit for monitoring the operating condition of an electric lo

1982-04-08

1986-04-15

Myracle, Jerry W.

Communications: electrical

Condition responsive indicating system

Specific condition

340660, 340664, G08B 2100

Patent

active

045830860

ABSTRACT:
A monitor is disclosed for monitoring the operation of an electrically powered load, such as a solenoid or a resistance heater. The load is connected across a power source and normally draws current therefrom. An integrated circuit includes means for energizing a load on indicator so long as the load is drawing current. A power on indicator is energized so long as the monitor receives power from the power source. When the monitor senses that current is no longer being drawn by the load it energizes a flashing on-off fault indicator.

REFERENCES:
patent: 3334341 (1967-08-01), Green
patent: 3631392 (1971-12-01), Zelina
patent: 3658085 (1972-04-01), Cannella
patent: 3744046 (1973-07-01), Tamasi
patent: 3838339 (1974-09-01), Brandt
patent: 3927399 (1975-12-01), Fuzzell
patent: 4031461 (1977-06-01), Reiner
patent: 4052664 (1977-10-01), Pohl
patent: 4189673 (1980-02-01), Shintaku
patent: 4298869 (1981-11-01), Okuno
patent: 4422039 (1983-12-01), Davis
Wen, Y., Voltage Monitor Using a 555, from New Electronics (British), vol. 14, No. 11, Jun. 2, 1981, p. 38.
Edwards, D., LED Flasher Based on Inexpensive IC, from Electronics Australia, vol. 37, No. 4, Jul. '75, pp. 52-53.

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