Electrical resistors – Mechanically variable – Liquid resistance element
Patent
1979-09-10
1982-04-13
Albritton, C. L.
Electrical resistors
Mechanically variable
Liquid resistance element
338 94, 338294, 338296, 338304, H01C 1002
Patent
active
043250491
ABSTRACT:
An electrode for a liquid rheostat comprises a plurality of globally annular elements arranged successively and electrically connected together two at a time. The annular elements progressively decrease in size. The electrode can be formed from a continuous metal strand wound in a spiral, the turns of the strand forming the annular elements. A liquid rheostat including such electrodes is particularly suitable for starting an electric motor as it produces a gradual start up characteristic.
REFERENCES:
patent: 1196254 (1916-08-01), McCormick
patent: 1232450 (1917-07-01), Misland
patent: 1267973 (1918-05-01), Chubb
patent: 1332167 (1920-02-01), DeWein
patent: 1374562 (1921-04-01), Hall
patent: 1547858 (1925-07-01), Cowin
patent: 1688202 (1928-10-01), Neall et al.
patent: 3297972 (1967-01-01), Hyde
Albritton C. L.
Brown Charles E.
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