Relay driving circuit for a latch-in relay
CA 2005183 C · Owner: Antonitsch, Sepp · Inventors: Kasano, Fumihiro; Antonitsch, Sepp; Steinbichler, Wolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A relay driving circuit for a latch-in type magnetic relay having an excitation coil to selectively provide a set current to the coil for making the relay into a set position and a reset current of opposite polarity to the coil for making the relay into a reset position. A capacitor is provided between input terminals of the circuit in series with the coil to be responsible for discharging the reset current. A set switch is connected in circuit in series with the series combination of the coil and the capacitor while a reset switch is connected across the series combination. An input voltage level detector is provided to make the set switch conductive in response to the input voltage being …
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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 December 11, 1989 and granted August 16, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- 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.