US PATENT SUBCLASS 334 / 55
.~ Capacitor only modified or substituted by switching


Current as of: June, 1999
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334 /   HD   TUNERS

47  DF  WITH SWITCHING MEANS {8}
55.~ Capacitor only modified or substituted by switching


DEFINITION

Classification: 334/55

(under subclass 47) Subject matter in which the element or elements substituted by the switching operation consists of a plurality of capacitors.

(1) Note. Subject matter usually found in this subclass consists of an inductor element which is mechanically fixed in the tuned circuit and is connected to a switch which substitutes various capacitors into or out of the circuit to thus vary the resonant frequency of the tuner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7, for push button and/or lever operated tuners which may be of the type which substitutes one capacitor for another within the tuned circuit.

78+, for tuner units which are tuned by a continuous variable capacitor.

SEE OR SEARCH CLASS 320, Electricity: Battery or Capacitor Charging or Discharging,

166+, for charging or discharging a capacitor, per se.