Electrical resistors

SECTION I - CLASS DEFINITION

GENERAL STATEMENT OF THE CLASS SUBJECT MATTER:

A. This class includes electrical resistors as above defined with solid, granular, or liquid resistance elements. These resistors may be either fixed or variable in resistance value, examples of the latter being rheostats and potentiometers. Semiconductors are included if limited by claimed subject matter to resistance properties, such as exists in photoconductive and thermistor type resistors. Excluded are conductors and insulators, which while including a resistive characteristic have other predominating characteristics.

B. Included also are resistors with perfecting structure not elsewhere classified such as resistors whose resistance value is temperature compensated, or resistors mounted on wheels or on a vehicle, resistors with heat dissipating projections, or with cooling gas or liquid circulation, or with heat storing, or with inductance or capacity reducing, or with electrical shields, or with a cleaner or a setting indicator in a mechanically variable resistor, or with a casing or housing, or with protecting structure spaced from the element, or with mounting or supporting means.