Fiber optic speed sensing for a rotating shaft
CA 1332207 C · Owner: Brennan, Brian W. · Inventors: Brennan, Brian W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for monitoring the rate of rotation of, for example, a turbine engine shaft during the operation of the engine is described. A chopper extends radially from the shaft. Infrared radiation is passed through an input optical fibre having a bevelled end positioned adjacent to the chopper which chops the infrared radiation. The chopped infrared radiation passes into a bevelled end of an output optical fibre which is positioned adjacent to the chopper. The rate of rotation of the shaft is detected by monitoring the chopped infrared radiation from the output optical fibre. Carbonaceous coatings are formed on the bevelled ends of the optical fibres by deposition of oil and …
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 October 4, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 4, 2011.
- 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.