Electrical control devices
CA 1073251 A · Owner: Cohn, James M. · Inventors: Cohn, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrical control device comprises a base member, and an elongate support member mounted to be movable transversely of its length with respect to the base member and biased against movement in one direction transversely of its length and towards a position. An elongate resistive member extends along the length of the support member and, when the ends of the resistive member are connected to opposite poles of a voltage source a sensing electrode can be applied to the resistive member to tap off a voltage which is selectively variable by varying the position along the support member at which the sensing electrode is applied to the resistive member. Application of the sensing electrode to …
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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 March 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 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.