Encoder apparatus and methods employing optical and graphical programming
CA 2247353 C · Owner: Opto Generic Devices, Inc. · Inventors: Durham, Ormonde G. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical encoder apparatus and methods are provided for converting the cyclic motion of an electro-mechanical machine such as an electric motor, into at , least one electrical signal having a predetermined waveform. The apparatus may include at least one photo-detector (26) which is responsive to at least one pattern of incident radiant energy; at least one photo-emitter (24) that emits a supply of radiant energy coupled to the photo-detector by an optical path; and an optically programmed system including an optical encoder disc (30) which contains at least one optically detectable graphical pattern (32) and a mask (36) containing at least one aperture (38) which permits the pattern …
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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
- Filed February 27, 1996 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2018.
- 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
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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.