(under subclass 68) Subject matter including a housing or casing which substantially entirely encloses the mechanically adjustable or variable resistor, with only the necessary resistor operating mechanism extending outside the casing to permit external adjustment of the resistor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19, for photoconductive resistors with transparent housings.
70+, for a variable resistor housed in a lamp socket.
77, for plug box type resistors.
80+, for liquid element resistors.
163, for mechanically adjustable resistors with an angularly slidable contact and a knob forming a casing or covering; and subclass 164 for such resistors with hermetically sealed housings. 184, for resistors with a movable contact electrically adjustable over the length of the element, the resistors being housed.
192+, for a tap type resistor whose element is enclosed.
226+, for incased, embedded, or housed resistors generally. See also the Search Notes under this subclass for a more extensive field of search for such resistors.
