Shielded magnetic reed switch
CA 2371495 A1 · Owner: Morgan, Raymond Lee · Inventors: Morgan, Raymond Lee; Posey, David Tyler
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shielded magnetic reed switch provides a magnetic reed switch disposed within a ferrous metal housing so that the ferrous metal housing shields the magnetic reed switch from magnetic flux. The shielded magnetic reed switch of the present invention remains unactuated until the ferrous metal housing is fully saturated and the magnetic flux required to actuate the magnetic reed switch is available within the ferrous metal housing. The present invention further provides a sensor for detecting the presence of an approaching magnetic field source at a predetermined distance between the shielded magnetic reed switch and the approaching magnetic field source.
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
- Filed April 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2022.
- 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.