Apparatus for sensing notches
CA 1074418 A · Owner: Gretag Aktiengesellschaft · Inventors: Luscher, Rene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention A device for sensing notches in an edge of a longitudinally transported film strip has a two-armed lever pivoted at a point to one side of the film path to deflect in the film plane. One arm carries at its end a spring biased roller which rotates freely against the moving unnotched film edge but which is biased into engagement with a notch to deflect the lever. The other lever arm is contacted by the actuating button of a microswitch the internal spring of which biases the lever to a quiescent position. A preselected deflection of the lever from this position actuates the microswitch to indicate the presence of a notch. Stops limit the deflection of the lever which …
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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 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 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.