(under the class definition) Inductor devices provided with means for shielding at least part of the inductor device from external electric or magnetic fields, or with means to protect parts of the device from undesired electric or magnetic fields originating in another part of the device, or with means to prevent the inductor device from emanating undesired electric or magnetic fields.
SEE OR SEARCH THIS CLASS, SUBCLASS:
69+, for inductive devices having coil capacitance modifying means and in which electrostatic shields are associated with the coil means to shield coils from each other, or in special arrangements for balancing coil capacitances, or to modify the coil surge potential gradient.
73+, for inductive devices having a closed or short-circuited coil which is often in the form of a conductive screen or plate of the electrostatic shield type, and indented subclasses 75+ for inductor devices having a movable nonmagnetic conductive screen or shield which is used to vary the effective inductance of the inductor device.
82, for inductive devices wherein a coil, formed as a solid, unitary structure of conductive material, forms the casing of the inductive device and may function in part like an electrostatic shield.
83, for inductive devices wherein the coil or winding thereof is totally enclosed by a magnetic core (so-called "ironclad" cores) which structure tends to confine the electromagnetic field within the bounds of the inductor. 90+, for inductor devices with casings or housings not limited by claimed subject matter to electric or magnetic shielding.
SEE OR SEARCH CLASS
174, Electricity: Conductors and Insulators,
32+, for miscellaneous anti-inductive structures, see particularly subclasses 35+ for miscellaneous electrical shields and screen structures not elsewhere classifiable. The search notes to subclasses 32+ indicate further fields of search for anti-inductive and shielding structure.
307, Electrical Transmission or Interconnection Systems,
39+, for anti-inductive means to prevent or modify the coupling between electrical systems, particularly subclass 91 for "shielding means".
310, Electrical Generator or Motor Structure,
256, for stray field flux loss prevention by shielding means in rotary dynamoelectric machines.
330, Amplifiers,
68, for amplifiers combined with significant details of shielding structure, generally, subclass 170 for amplifiers having transformer coupling including shielding means involved in such transformer coupling.
331, Oscillators, 67, for oscillator systems provided with an electromagnetic or electrostatic shield. The shield may be for an element (such as an inductor) of the oscillator system.
333, Wave Transmission Lines and Networks,
12, for transmission line inductive or radiation interference reduction systems which include shielding means for the purpose.
343, Communications: Radio Wave Antennas,
842, for loop type antennas with an electrical shield.
361, Electricity: Electrical Systems and Devices,
268+, for inductors with integral switch or capacitor means, particularly subclass 270 for those inductive devices structurally combined with a capacitor.
