Optimization of iron-cored electro magnets for biomedical stimulators
CA 1323907 C · Owner: Chambers, David C. · Inventors: Watson, Joseph; Chambers, David C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of optimizing the structure of an electromagnet so that when its coil is energized by electrical pulses of predetermined duration and amplitude the electromagnet induces voltages of first and second predetermined magnitudes in a standardized search coil located midway between pole faces of the iron core at times corresponding to the beginning and end of the pulses. The voltage induced in the search coil at the beginning of the pulses is measured and, if it is greater than the first predetermined magnitude, the number of turns of the coil is increased whereas, if it is less than the first predetermined magnitude, the number of turns is decreased. The voltage induced in …
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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 November 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 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.