Resistor device for controlling a rotational speed of a motor

Details Resistor device for controlling a rotational speed of a motor Resistor device for controlling a rotational speed of a motor

1994-07-01

1996-08-27

Walberg, Teresa J.

Electrical resistors

Mounted on wheels or vehicle

338 24, 338 92, 338 51, 338 95, 310 68C, 310 68D, 361 23, 361 27, H01C 1300

Patent

active

055505279

ABSTRACT:
A resistor device for controlling a rotational speed of a resistance unit and an open-circuit means. A receiving recess is provided to any one side surface of a heat sink vertically affixed to a top surface plate of a housing. A resistance unit, which is protected by a film and made of metal material forming a resistor circuit for gradually controlling the rotational speed of a motor, is received within the recess in the heat sink and connected to a terminal. An open-circuit means, having a soldered portion which is fused at a predetermined temperature upon an overload of the motor, is provided at a predetermined distance between the resistance unit and a terminal.

REFERENCES:
patent: 4034265 (1977-07-01), DuRocher et al.
patent: 4247842 (1981-01-01), Bengsch et al.
patent: 4408244 (1983-10-01), Weible
patent: 4992687 (1991-02-01), Nel
patent: 5000662 (1991-03-01), Yamamoto et al.
patent: 5291174 (1994-03-01), Zirnheld et al.
patent: 5294852 (1994-03-01), Straker

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