Single turn variable resistance device having a split shaft roto

Details Single turn variable resistance device having a split shaft roto Single turn variable resistance device having a split shaft roto

1974-03-18

1976-06-15

Reynolds, Bruce A.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338157, 338174, 338202, H01C 1032

Patent

active

039640116

ABSTRACT:
A single turn potentiometer is constructed as either an open frame or a housed unit. Both units incorporate a helical coil spring wiper mounted within a rotor. In the open-frame unit, the rotor includes a shaft which extends through a corresponding hole on a ceramic substrate. The ceramic substrate cooperates with the rotor and includes a deposited cermet resistance element and a circular collector ring. A stop arrangement is built into the rotor in the open-frame unit. The closed-frame unit includes a housing having a molded-in stop for cooperation with a similar stop on the rotor. In the open-frame unit, the shaft which protrudes through the hole in the substrate is of split configuration and is spread by an insert to hold the rotor to the substrate in riveting fashion. The closed-frame unit employs a peened-over portion of the housing which is used to constrain the assembly. Means and method for affixing the conductor leads to the substrate are disclosed.

REFERENCES:
patent: 2143401 (1939-01-01), Arvin
patent: 2593332 (1952-04-01), Muchea
patent: 2757264 (1956-07-01), Zarrillo
patent: 2866054 (1958-12-01), Purdy
patent: 2925575 (1960-02-01), Barden
patent: 3319209 (1967-05-01), Reyenga
patent: 3343116 (1967-09-01), Budd et al.
patent: 3421133 (1969-01-01), Van Beuthuysen
patent: 3497847 (1970-02-01), Schapiru
patent: 3531753 (1970-09-01), Geese
patent: 3531754 (1970-09-01), Geese
patent: 3710674 (1973-01-01), Tabor
patent: 3772630 (1973-11-01), Falco

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