Resistance unit for motor speed control

Details Resistance unit for motor speed control Resistance unit for motor speed control

1991-12-18

1993-03-09

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337105, 361104, H01H 6102

Patent

active

051929376

ABSTRACT:
A resistance unit has a temperature fuse between a resistance and a terminal for deactivating a resistance circuit when the motor reaches the permissible maximum temperature.
The resistance unit having resistance connected in series with a plurality of terminals for controlling the speed of a motor comprises at least one temperature fuse electrically interposed between one of the terminals and one end of a corresponding one of the resistances for deactivating the resistance circuit when the resistance unit is overheated.

REFERENCES:
patent: 2790049 (1957-04-01), McAlister
patent: 3243554 (1966-03-01), Malone
patent: 3763454 (1973-10-01), Zandonatti
patent: 5084691 (1992-01-01), Lester et al.

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