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Expired Canadian patentCanada

Vibratory digital integrating accelerometer

CA 1281203 C · Owner: Boxenhorn, Burton · Inventors: Boxenhorn, Burton

CIPO record

Overview

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

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Abstract From the Canadian patent

An accelerometer transducer has a base holding a sheet normal to an input axis. The sheet is suspended from the base by a first spring arrangement for oscillatory motion in the way of limited angular excursions about a central axis lying in the sheet. A weight is spring-suspended from the sheet in a manner permitting displacement of the center of gravity of the weight along the input axis. Acceleration along the input axis varies the moment of inertia of the assembly consisting of the sheet and the weight about the central axis altering, the frequency of oscillatory motion by an amount functionally related to the magnitude of the acceleration. Means are provided to drive the sheet at its …

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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 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 5, 1986
GrantedMarch 12, 1991
Term endedMarch 12, 2008
Patent numberCA 1281203 C
Classification (IPC)G01P15/02 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 5, 1986Patent grantedMarch 12, 1991Term endedMarch 12, 2008

Sources & verification

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