Device for detecting the positions of pivotable parts of a rail switch
CA 2247978 C · Owner: Vae Aktiengesellschaft · Inventors: Frauscher, Josef; Seidl, Kurt
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 device for detecting positions of parts of a rail switch, the device comprising at least one continuous distance sensor for producing an output representative of measured distance between a pivotable part and a fixed part of the switch the output, being connected to a circuit having stored therein characteristic curve data representative of the switch operating between open and closed positions the circuit, being configured to connect with the sensor output and the characteristic curve data to perform two separate evaluations, the first evaluation being a distance evaluation and the second evaluation being an evaluation as to whether the sensor is functioning …
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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 March 11, 1997 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2019.
- 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.