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Expired Canadian patentCanada

Testing unit for rotary shaft encoders

CA 1287371 C · Owner: Phillip'S Feedback Consultant Service, Ltd. · Inventors: Barnaby, Phillip Craig

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

The present invention is a portable testing apparatus for field testing rotary shaft encoders. The rotary shaft encoder is mounted in connection to a motor disposed on a mounting panel whose direction and speed of rotation is controlled by a motor controller. The rotatable shaft of the rotary shaft encoder is coupled to the motor shaft via a shaft couple. A multiple wire connector is employed to connect to the plurality of connection wires of the rotary shaft encoder. Each connection wire of the rotary shaft encoder is connected to one of a plurality of single pole, multiple throw load selection switches. This permits connection of an operator selected one of a predetermined set of voltages …

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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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 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.
FiledApril 6, 1989
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287371 C
Classification (IPC)G01R31/02 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedApril 6, 1989Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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