Variable resistor device

Details Variable resistor device Variable resistor device

1990-09-11

1991-10-22

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Resistance element adjustably short-circuited

338 96, 338139, 338141, 84423B, 340711, H01C 1006

Patent

active

050599399

ABSTRACT:
A push button variable resistor device includes a hollow push button seat member confining a receiving space, and at least one resistor piece fixed inside the seat member. The resistor piece has a contact portion and at least one leg portion projecting outward through a base portion of the seat member. A spiral spring resistor is disposed inside the receiving space of the seat member above the resistor piece. The spring resistor has a plurality of concentric turns of varying diameters. A push button is slidably fitted through a button opening of the seat member. The spring resistor hs a topmost turn cooperatively associated with the push button. The push button is externally pushed to compress the spring resistor to cause the concentric turns to contact the resistor piece. The contact area between the spring resistor and the resistor piece varies according to the degree of depression of the push button to correspondingly vary the output resistance of the variable resistor device.

REFERENCES:
patent: 260623 (1882-07-01), Starr
patent: 488121 (1892-12-01), Houghton et al.
patent: 3134045 (1964-05-01), Shulman et al.
patent: 4257305 (1981-03-01), Friend et al.

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