Railway work machine
CA 1203123 A · Owner: Sig Societe Industrielle Suisse · Inventors: Jaquet, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A railway work machine has a railway track displacement tool for correcting levelling or alignment defects of the railway track, a regulating member for adjusting the displacement of the tool, and a device for detecting the geometrical defects of the track and controlling said regulating member. The detection device comprises rail feelers spaced apart from each other and to which there are connected a lightray emitter, a screen having two parallel delimiting edges and, a receiver having two identical photovoltaic cells arranged in such a manner that the sum (u + d) of their irradiated surfaces is a constant and the difference (u - d) thereof is proportional to the amplitude of the detected …
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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 April 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 2003.
- 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.