Motor control system and control head

Details Motor control system and control head Motor control system and control head

1996-01-29

1998-11-17

Hoang, Tu B.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338118, 338150, 338160, 338163, H01C 1026

Patent

active

058382216

ABSTRACT:
A control head for remote actuators on a vehicle heater/air conditioner system comprises variable resistors operated by control knobs to provide variable motor control voltages to the actuators which comprise servo-actuators or a pulse width modulated blower motor. The control head has a molded plastic housing with embedded conductive runners terminating in wipers. A control disk rotatable with each knob has an arcuate resistive film and a pair of arcuate conductors connected to ends of the film. The wipers engage the arcuate elements to apply a supply voltage to the conductors and pick off a control voltage from the resistive film. Alternatively the arcuate elements are on the housing and the wiper is on the control disk.

REFERENCES:
patent: 2873336 (1959-02-01), Tassara
patent: 4184140 (1980-01-01), Frey, Jr. et al.
patent: 4477795 (1984-10-01), Henmi et al.
patent: 5546067 (1996-08-01), Schmidt et al.

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