US PATENT SUBCLASS 338 / 176
.~.~.~ Contact rectilinearly slidable

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  DF  .~.~ Contact slides along in contact with element {3}
176.~.~.~ Contact rectilinearly slidable {6}
177  DF  .~.~.~.~> Contact surrounds resistor
178  DF  .~.~.~.~> Contact separable from element for switching
179  DF  .~.~.~.~> With series switch
180  DF  .~.~.~.~> Screw-operated {1}
182  DF  .~.~.~.~> With contact lock
183  DF  .~.~.~.~> With collector bar

DEFINITION

Classification: 338/176

(under subclass 160) Subject matter wherein the movable

contact terminal moves in a straight path over or along a resistance element, the contact terminal remaining in contact with the element as it slides along.

(1) Note. Subject matter found in this subclass usually consists of a resistor element having an elongated shape with at least two terminals connected to the element, at least one of the terminals being rectilinearly slidable along or over, and in direct contact with the resistance element so that the effective resistance of the circuit may be changed by sliding the terminal with respect to the resistance element.

(2) Note. The contact terminal may be removed from the element at any point in the sliding path or at an end for switching purposes. See subclass 178 below for such subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

74, for a variable resistor having a rectilinearly slidable contact, and mounted in or on a lamp socket.

117, for a variable resistor having slidable helical and linear contacts. 133, for ganged rectilinearly operated variable resistors.

194, for a variable resistor having taps and a rectilinearly movable contact.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

4, and 16 for multiple circuit control switches with reciprocating contacts; and subclasses 76+ for snap switches having reciprocating contacts.