Arrangement for detecting an object by means of sound conducted through a solid body and method of using such arrangement
CA 2049023 A1 · Owner: Muller, Bruno · Inventors: Muller, Bruno; Muller, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To identify an object (2) which emits structure-borne noise onto a base, for example a railway vehicle approaching a track construction site, the vibrations (S) generated by the structure-borne noise are detected by a structure-borne noise recorder (2) attached to a rail (1) and are processed by an evaluation circuit (C). A warning signal (Sw) is emitted when the intensity of the output signal (Sa) from the recorder constantly increases for example, when the intensity exceeds given threshold values in a suitable frequency range in predetermined times; in other words constantly , swelling noise propagated in the rails (1) is evaluated as a reliable criterion for emitting a warning signal …
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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 January 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2013.
- 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
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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.