US PATENT SUBCLASS 338 / 160
.~.~ Contact slides along in contact with element

Current as of: June, 1999
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338 /   HD   ELECTRICAL RESISTORS

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
118  DF  .~ Movable contact electrically adjustable over length of resistance element {21}
160.~.~ Contact slides along in contact with element {3}
161  DF  .~.~.~> With element casing open over contact track
162  DF  .~.~.~> Contact angularly slidable {11}
176  DF  .~.~.~> Contact rectilinearly slidable {6}

DEFINITION

Classification: 338/160

(under subclass 118) Subject matter wherein the movable contact terminal slides or rubs along and remains in direct contact with the resistor element while sliding or rubbing along to enable a portion of the length of the element to be placed in the electrical circuit.

(1) Note. The contact may be removed from the element as by being moved off an end of the element, or raised from the element, as for switching purposes as provided in indented subclass 173.

SEE OR SEARCH THIS CLASS, SUBCLASS:

86, for variable liquid resistors wherein the level of the liquid is adjustable.

117, for a variable resistor having slidable helical and linear contacts.

137+, for a variable resistor having plural moving contacts.

138+, for variable resistors having tapered elements. 143+, for a variable resistor whose contactor moves along a helical resistance element.

150+, for variable resistors whose element moves in relation to a fixed contact.

154, for a resistor with an intermediate contactor between the resistance element and the contact member.

185+, for a variable resistor having intervening connectors between the contact and element, e.g., taps.

SEE OR SEARCH CLASS

336, Inductor Devices,

137+, for inductors with means for varying the effective coil

length.