US PATENT SUBCLASS 200 / 512
.~ Membrane type

Current as of: June, 1999
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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

502  DF  SOLID CONTACT {15}
512.~ Membrane type {5}
513  DF  .~.~> Specific dome shape
514  DF  .~.~> Specitic nonconductive materials
515  DF  .~.~> Pressure equalizing means
516  DF  .~.~> Including auxiliary dome/disc type spring
517  DF  .~.~> Including additional actuator

DEFINITION

Classification: 200/512

Membrane type:

(under subclass 502) Subject matter wherein the switch includes at least one contact member which is carried on or actuated by a flexible sheet, which cooperates with another contact on a substrate to open or close a circuit.

(1) Note. The membrane switch normally comprises a substrate and a flexible sheet sealed together with a separate spacer which is normally used to separate the substrate, and the flexible sheet normally carries the moving contact.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5, for similar type switches arranged in keyboard manner.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion,

20+, for an operator actuated code transmitter including circuitry. 361, Electricity: Electrical Systems and Devices,

288,.

400, Typewriting Machines,

479.1, for push button controllers using variable capacitance. The capacitor normally has a substrate with a conductive plate and a flexible membrane with a moveable conductive plate like a membrane switch but has in addition an insulative layer to prevent the plates from contact.