An improved arc extinguishing device and method of assembling same
CA 2127786 A1 · Owner: Square D. Company · Inventors: Rezac, Willard J.; Edds, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the present invention there is provided an arc extinguishing device (50) for disposition along a pre-determined path of movement between two electrical contacts (16 18) in an electrical distribution device. The device (50) includes a generally U-shaped cradle member (54) made of a thermoplastic composition with at least one triad of slots (72 74, 76). A U-, shaped plate (78) is included for each triad of slots (72 74, 76). Each plate (78) is retained in connection with the cradle member (54). The retaining means (92) is integrally formed with the cradle member (54). Suitable materials for the plate (78) include a magnetic metal and a conductive thermoplastic composition.
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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
- Filed November 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2015.
- 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.