US PATENT SUBCLASS 338 / 120
.~.~ Additional resistor adjustably shunts part of resistance element (e.g., varifunction type

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


338 /   HD   ELECTRICAL RESISTORS

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
118  DF  .~ Movable contact electrically adjustable over length of resistance element {21}
120.~.~ Additional resistor adjustably shunts part of resistance element (e.g., varifunction type

DEFINITION

Classification: 338/120

(under subclass 118) Subject matter wherein an additional resistor is connected in parallel with a portion (less than the entire length of the resistance element), at least one of the connections to the resistance element being adjustable along the length of the element and/or the resistor being adjustable in resistance value.

(1) Note. The purpose of this shunting resistor is to modify the resistance value along the length of the element to secure particular relationships (linear or nonlinear) between the movement of the contact and the resistance value appearing across the resistor terminals. See subclasses 89+ for adjustable resistors where a definite mathematical relationship exists between the resistance value across the resistor terminals and movement of the contact, and subclass 121 for adjustable resistors of the movable contact type with structure for securing a linear relationship between the resistance value across the resistor terminals and movement of the contact.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89+, see (1) Note above.

121, see (1) Note above.