Switch mechanism for a calculator type keyboard
CA 1104235 A · Owner: Rca Corporation · Inventors: Smith, Theodore D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calculator type keyboard includes push-button switch contact mechanisms formed as integral parts of a conductive web. Each of the mechanisms includes support arms intersecting in a crisscross configuration only a portion of which is deformed in a dome-like contour. Contact blades extend from the intersection of the support arms and have ends coupled to adjacent support arms by bridge members. As the switch contact mechanism is depressed to various degrees the, supported contact blades make contact with respective binary code conductors, the dome-like contour deflects through a snap action position and finally the apex of the dome-like contour makes contact with a centrally located flag …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.