Electrical compass
CA 1184376 A · Owner: Prince Corporation · Inventors: Franks, Jeffrey L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetic field detecting system for use with a flux-gate sensor includes an oscillator the output of which, is applied to a digital bandpass filter and frequency divided and also applied to the sensor and phase detectors, such that the frequency and phase of the output signals from the flux-gate sensor have a predetermined relationship to the excitation signal. In one embodiment of the invention the direction indicating output signals from the phase detectors are applied to a suitable interface circuit for a microprocessor which converts the signals to a digital format employed for application, to an alpha-type display for displaying the octal magnetic orientation of a vehicle.
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 March 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 26, 2002.
- 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.