Rotational position sensor
CA 2068795 A1 · Owner: The Babcock & Wilcox Company · Inventors: Griffith, John Carroll; Glass, Samuel William Iii; Staples, Samuel Wayne Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotational position sensor for determining the rotational position of an inspection head rotatably mounted on a probe body. The position sensor is formed from a spiral shaped encoder wheel and eddy current coil. The encoder wheel is rotatably mounted in the probe body and is rotated simultaneously with an inspection head. The eddy current coil is mounted in a stationary position in the probe body and radially spaced from the encoder wheel. During rotation of the encoder wheel the changing air gap between the eddy current coil and encoder wheel produces a variable electrical signal from the eddy current coil that is representative of the rotational angular position of the inspection head.
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
- Filed May 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2014.
- 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.