Electrical warning system for malfunctions in refrigeration

Details Electrical warning system for malfunctions in refrigeration Electrical warning system for malfunctions in refrigeration

1982-09-28

1985-04-30

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

62129, 318490, 340664, 324133, G08B 2100

Patent

active

045147248

ABSTRACT:
An electrical warning system for malfunctions in refrigeration equipment driven by an electric motor comprises a main resistor connected in series with the motor to cause only a small voltage drop in the power supply to the motor, a high amp shunt across the main resistor comprising a diode, resistor and light-emitting diode, and a low amp shunt across the main resistor comprising a diode and light-emitting diode with the latter having in parallel a capacitor as well as a resistor in series with a zener diode.

REFERENCES:
patent: 2605304 (1952-07-01), Proctor et al.
patent: 2654860 (1953-10-01), Lewis
patent: 3041520 (1962-06-01), Sidell
patent: 3482236 (1969-12-01), Seney
patent: 3795830 (1974-03-01), Richardson
patent: 3809985 (1974-05-01), Krause et al.
patent: 3980997 (1976-09-01), Berns et al.
patent: 3999176 (1976-12-01), Kellogg et al.
patent: 4025850 (1977-05-01), Spiteri

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