US PATENT SUBCLASS 335 / 222
.~.~ With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube)

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

209  DF  MAGNETS AND ELECTROMAGNETS {10}
220  DF  .~ With magneto-mechanical motive device (e.g., electromagnet with armature) {21}
222.~.~ With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube)

DEFINITION

Classification: 335/222

(under subclass 220) Subject matter including a permanent magnet and a coil suspended or positioned within the magnetic field of the permanent magnet for relative movement with respect to the permanent magnet; the relative movement being caused by interaction of a magnetic field produced in the coil and the magnetic field of the permanent magnet.

(1) Note. This subclass includes the electromagnetic portion of the D'Arsonval type galvanometer but does not provide for the complete galvanometer which is located in Class 324, Electricity: Measuring and Testing, subclasses 144+, especially subclass 146.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148+, for electrodynamically actuated switches with moving coils.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure, 10+, for electric generators or motor structure which include subject matter as provided for in this subclass.

324, Electricity: Measuring and Testing,

76.11+, for apparatus for measuring, testing or sensing devices with a moving coil especially subclass 146 (see (1) Note above).