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Expired Canadian patentCanada

Tuned coriolis angular rate measuring device

CA 1163840 A · Owner: General Electric Company · Inventors: Wells, Robert C.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A tuned coriolis angular rate measuring device, includes a substantially hollow generally annular, rotor driven by a high-speed synchronous spin motor. The motor is made unsymmetrical by mounting within the rotor near its periphery at least a pair of high density masses, the respective masses being located diametrically opposite one another. The rotor is secured within a gimbal structure which is in turn, mounted in tuned fashion upon a support housing through a cantilever spring at each end along the gimbal output axis, thereby providing bearingless frictionless pivots permitting limited gimbal rotation. A pair of piezo-electric crystals is secured at opposite edges of one of the springs …

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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 March 20, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1982
GrantedMarch 20, 1984
Term endedMarch 20, 2001
Patent numberCA 1163840 A
Classification (IPC)G01C19/42

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMarch 25, 1982Patent grantedMarch 20, 1984Term endedMarch 20, 2001

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.