Fluid detector device in a drive motor for an underground mining

Details Fluid detector device in a drive motor for an underground mining Fluid detector device in a drive motor for an underground mining

1974-08-02

1976-02-24

Caldwell, John W.

Communications: electrical

Systems

Call station

340270, G08B 2100

Patent

active

039407543

ABSTRACT:
An electric drive motor for an underground mining machine includes a capacitive-type detector supported within the motor housing for contact by fluid that may penetrate beyond the motor shaft seals and the like. The capacitance of the detector decreases when fluids penetrate the motor shaft seals and electrical circuitry detects such a capacitance change of the detector for indicating the presence of fluids within the motor housing to prevent damage to the motor windings. The disclosure includes several forms and arrangements of the detector for the electric motor.

REFERENCES:
patent: 3028548 (1962-04-01), Breen
patent: 3046479 (1962-07-01), Mead et al.
patent: 3103002 (1963-09-01), Pearson
patent: 3122919 (1964-03-01), Kendrick
patent: 3176222 (1965-03-01), Atkisson
patent: 3226615 (1965-12-01), Nagel
patent: 3430116 (1969-02-01), Johnstone
patent: 3500366 (1970-03-01), Chesney et al.
patent: 3774185 (1973-11-01), Parth

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