US PATENT SUBCLASS 337 / 53
.~.~.~.~ Snap-action

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}
37  DF  .~.~ With manual or other mechanical contact controlling means {12}
52  DF  .~.~.~ With spring or other energy storage device {4}
53.~.~.~.~ Snap-action {4}
54  DF  .~.~.~.~.~> With magnetic flux source (e.g., magnetic armature)
55  DF  .~.~.~.~.~> With latching or holding means
56  DF  .~.~.~.~.~> With reclosing or reset means
57  DF  .~.~.~.~.~> With adjusting or calibration means

DEFINITION

Classification: 337/53

(under subclass 52) Subject matter comprising means whereby a movable contact or contacts, may be operated from a first position to a second position quickly, as by a snap action, the contacts motion being independent of the rate of movement of the operator. This is usually accomplished by a spring connection between the operator and the contact carrier so arranged that the initial movement of the operator places the spring under tension whereby upon release of a holding means the contact is snapped from one position to another by action of the spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89+, for electrothermal bimetallic element switch with snap action.

131+, for electrothermal longitudinally expansible element switch with snap action means.

147, for electrothermal fusible element switch with snap action means.

318, for thermally actuated expansible fluid snap action switch.

343, for similar devices with thermally responsive bimetallic actuating means. 365+, for thermally actuated bimetallic element snap action switches.

390+, for thermally actuated longitudinally expanding element snap action switch.