Vacuum-type contactor assembly
CA 1113986 A · Owner: Westinghouse Electric Corporation · Inventors: Wilson, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a vacuum-type switching apparatus, such as a contactor for motor control equipment, which includes a linkage (11-22) and a contactpressure producing means (29) both utilizing the same lever (11) of the linkage to transmit to the contacts respectively a contact-closing force when the switch actuating means is energized, and a current-dependent contact-pressure producing force when the contacts are in their closed position. Associated with the linkage are a kickout spring (41) for opening the contacts and a heav-, ier contact-pressure spring (21) for providing constant contact pressure to the closed contacts the former being, charged only during the contact-closing …
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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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 1998.
- 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.