US PATENT SUBCLASS 337 / 90
.~.~.~.~ With magnetic armature or holding means

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
36  DF  .~ With bimetallic elements (i.e., motion takes place in a plane at right angles to its major axis) {10}
85  DF  .~.~ Bimetallic element unitary with or directly actuates movable contact means {6}
89  DF  .~.~.~ Snap-action {2}
90.~.~.~.~ With magnetic armature or holding means

DEFINITION

Classification: 337/90

(under subclass 89) Subject matter including means for establishing a field of magnetic flux whereby the actuation of the movable contact, or contacts, is at least in part

influenced by magnetic force operative within the flux field. The magnetic flux source is usually a permanent magnet.

(1) Note. For other snap action mechanisms with magnetic control or holding means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54, for other snap action mechanisms with magnetic control or holding means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS.

344, for similar devices utilizing thermally actuated bimetallic elements.

SEE OR SEARCH CLASS 200, Electricity: Circuit Makers and Breakers,

402+, for mechanical snap switches with holding means.

236, Automatic Temperature and Humidity Regulation, appropriate subclasses, especially

1, 9, 46, 68, and 91+ for automatic temperature control systems employing bimetallic actuating means with holding means.

290, Prime-Mover Dynamo Plants,

38, for electric starting motors employing snap switches with holding means.

313, Electric Lamp and Discharge Devices, appropriate subclasses, especially

153+, for electric discharge devices with electrothermal snap switches in the control circuit which employ magnetic means.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

141+, for electromagnetically operated switches having electrothermal means which may comprise bimetallic snap switches.