US PATENT SUBCLASS 335 / 99
.~ Alternating or fluctuating current type

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
99.~ Alternating or fluctuating current type {6}
100  DF  .~.~> Induction or eddy current (e.g., vane or closed conductive loop)
101  DF  .~.~> Preselected or synchronous frequency responsive
102  DF  .~.~> Polyphase
103  DF  .~.~> With plural magnetic-actuating structures
104  DF  .~.~> With chatter, bounce or vibration-prevention means
105  DF  .~.~> With damping or adjustment means

DEFINITION

Classification: 335/99

(under subclass 2) Subject matter wherein the device is specifically adapted for operation by an alternating, pulsating or fluctuating current. The actuating current may be a periodic current, the average value of which over a given period is zero and which varies according to a sinusoidal function, a bi-directional current which has both positive and negative values, or a periodic current which is the sum of a direct current and an alternating current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+, for switch actuating means comprising an induction motor whose armature comprises a vane making at least one complete revolution about its axis.

231, for polarized electromagnet responsive to the varying amplitude of an alternating current.

243+, for electromagnets and armature of the alternating current type.

SEE OR SEARCH CLASS 361, Electricity: Electrical Systems and Devices,

1+, and appropriate subclasses, for safety and protective systems which may be AC responsive and subclasses 139+ for alternating current circuits for relays and electromagnets.