Liquid rheostat for starting an electric motor with improved sil

Details Liquid rheostat for starting an electric motor with improved sil Liquid rheostat for starting an electric motor with improved sil

1983-08-05

1985-04-09

Envall, Jr., Roy N.

Electrical resistors

Mechanically variable

Liquid resistance element

338 86, 338 94, 338 38, 338195, 338222, 137576, H01C 1002

Patent

active

045104832

ABSTRACT:
A variable level liquid rheostat having a tubular overflow member between a starting chamber and a tank for controlling the level of electrolyte in the starting chamber. The overflow member has a closed upper end inside the starting chamber and lateral discharge orifices and communicates with the electrolyte in the tank. The overflow member produces a siphoning effect when the electrolyte level in the starting chamber is substantially above the discharge orifices for causing a sudden drop of the level in the starting chamber until the electrolyte level in the starting chamber again reaches the discharge.

REFERENCES:
patent: 1203610 (1916-11-01), Hall
patent: 1217473 (1917-02-01), Mace
patent: 1309802 (1919-07-01), Holthoff
patent: 1745510 (1925-07-01), Seegar
patent: 1966804 (1934-07-01), Planche
patent: 2855545 (1958-10-01), Beyard
patent: 2951504 (1960-09-01), McBroom
patent: 4325049 (1982-04-01), Bensadoun
Halter, "The Liquid Rheostat Returns", Allis Chalmers, Electrical Review First Quarter 1947, pp. 14-17.
Kivskik et al., "A Liquid Variable Resistor", Instruments and Experimental Technique, vol. 19, No. 2, pt. 2, Mar.-Apr. 1976, pp. 560-562.

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