Surface mount variable resistor with insert-molded slider

Details Surface mount variable resistor with insert-molded slider Surface mount variable resistor with insert-molded slider

1990-12-13

1992-03-10

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338190, 338193, 338174, 296101, H01C 1032

Patent

active

050952986

ABSTRACT:
A surface mount variable resistor includes a rotor assembly rotatably mounted on a substrate having an arcuate resistive element thereon. The rotor assembly includes a thermoplastic rotor and a conductive metal slider. The slider is a rivet having a flat head that is insert-molded into the plastic rotor, and a shank extending axially from the head, terminating in a tail end. A conductive metal wiper is welded to the head so as to be exposed from the rotor, thereby to establish electrical contact with the resistive element. A conductive metal collector element is disposed on the surface of the substrate opposite the resistive element. The substrate and the collector element have registering apertures through which the shank is inserted. The tail end of the shank is up-ended to engage the collector element, thereby (a) establishing electrical contact between the rivet and the collector element, (b) rotatably attaching the rotor assembly to the substrate, while restraining the rotor assembly from axial movement with respect to the substrate, and (c) retaining the collector element in engagement against the substrate.

REFERENCES:
patent: 3201737 (1965-08-01), Mathison et al.
patent: 3456227 (1969-07-01), Paine et al.
patent: 3470519 (1969-09-01), Hatch
patent: 3537056 (1970-10-01), Benthuysen et al.
patent: 3576514 (1971-04-01), Michik
patent: 3601743 (1971-08-01), Mathison
patent: 3617978 (1971-11-01), Gerstmeier
patent: 4511879 (1985-04-01), Fujii
patent: 4521761 (1985-06-01), Welch
patent: 4812015 (1989-04-01), Matsui et al.
patent: 4812803 (1989-03-01), Hochholzer
patent: 4821014 (1989-04-01), Masuda et al.

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