Wireless data coupling system
CA 1315564 C · Owner: Hanifan, Philip C. · Inventors: Hanifan, Philip C.; Little, John K.; Biggs, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wireless data coupling system for transmitting data such as torque from a rotating shaft to a stationary receiver includes several photocells spaced continuously around the circumference of the shaft along with a plurality of stationary light pipes with corresponding light sources for simultaneously illuminating all of the photocells. This provides a means of powering the rotating components. From a data standpoint an analog signal from a strain gauge is converted to a digital signal which is transmitted bit by bit by a pair of light emitting diodes one of which acts as a data sync. The stationary receiver contains columns of phototransistors to receive both the data and data sync pulses. …
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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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- 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.