US PATENT SUBCLASS 338 / 129
.~.~.~ Sequentially operated

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}
128  DF  .~.~ Plural {3}
129.~.~.~ Sequentially operated

DEFINITION

Classification: 338/129

(under subclass 128) Subject matter including structure which prevents operation of one resistor until a second resistor has completed a definite cycle of operation, i.e., the first resistor is operated after the operating cycle of the second resistor or is placed in condition to be operated after the opening cycle of the second resistor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

122, for resistors with coarse and fine elements such as vernier.

130+, for ganged mechanically adjustable resistors.