Speed detector for use with miniature dc motor
CA 1054237 A · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Tetsugu, Yoshio; Minakuchi, Hiroshi; Mitsui, Tsunemi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE OF THE INVENTION:, Speed Detector for use with Miniature DC Motor ABSTRACT OF THE DISCLOSURE:, A speed detector for use with a miniature DC motor is disclosed wherein means such as coils or Hall generators for detecting the magnitude and direction of leakage flux are placed in opposed relation with at least one pair of field poles of the DC motor, so that the output signal of a frequency in proportion to the number of slots of the armatur or in proportion to twice as much as thereof may be derived. - 1 -
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 May 8, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 8, 1996.
- 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.