Capacitive key for keyboard
CA 1090900 A · Owner: Becton, Dickinson, Electronics Company · Inventors: Voge, Andrew; Mullins, Barry W.; Cencel, Joseph A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to keyboards and capacitive keys for use in such keyboards. In the prior art such devices do not make the most efficient use of the available space and motion. Additionally keys allowing, for overtravel use many parts and are complex to assemble. The present invention overcomes these deficiencies by providing a capacitor in which a portion of a movable capacitor plate is formed into a spring which elastically deforms after the capacitor has been altered to permit, overtravel of the plunger.
Read the whole patent
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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
- 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.