Variable resistor

Details Variable resistor Variable resistor

1989-11-03

1991-10-01

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338163, 338164, 338167, 338171, H01C 1032

Patent

active

050537423

ABSTRACT:
A variable resistor having an insulating substate provided on the surface thereof with a resistor is molded into a resin case, a part of which is heated and bent to rotatably secure a rotor having a sliding member within the case for rotation with respect to the insulating substrate. The insulating substrate is molded into the resin case to make inside of the case airtight. An annular elastic body mounted between the under surface of a skirt portion of the rotor and the insulating substrate makes the space between the rotor and the insulating substrate airtight, and, at the same time, sets the rotational torque of the rotor to a suitable value. The arrangement of the insulating substrate, the resin case and the rotor having the sliding member, reduces the number of parts used for assembling the variable resistor, and together with the use of continuous strip hoop materials for forming terminals and the sliding member, allows for continuous automated production of the variable resistors.

REFERENCES:
patent: 3484734 (1969-12-01), Casey et al.
patent: 3537056 (1970-10-01), Van Benthuysen et al.

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