US PATENT SUBCLASS 324 / 152
.~.~ Drag magnet


Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

76.11  DF  MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46}
151 R  DF  .~ With permanent magnet {2}
152.~.~ Drag magnet


DEFINITION

Classification: 324/152

(under subclass 151) Subject matter in which the permanent magnet is associated with an eddy current means and the permanent magnet acts as a drag for the eddy current means.

(1) Note. The eddy current means usually is a disk rotor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

103, for excess type meters which utilize a hysteresis type brake (which has a constant counter-torque at all speeds) having a permanent magnet and for meters in which the torque on the drag magnet actuates an indicator by movement of the drag magnet

137+, for similar subject matter where an eddy current disk acts both as a motive element and a drag element.

139, for meters having a rotor which is driven by a constant torque device and having a brake whose drag is determined by the electricity to be measured. SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

103+, for magnetic field type torque transmitting brakes and clutches.