Method and apparatus for testing timbers for disconformity or decay
CA 1293559 C · Owner: Hosgood, Henry D. · Inventors: Banks, Leslie; Hosgood, Henry D.; Beauford, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for testing timbers for disconformity or decay. A method for testing timbers such as railway sleepers, for disconformities or decay by inducing vibrations in the timber, for example with an impactor monitored by means of an accelerometer mounted on it and connected to a microprocessor and a display unit to give an indication of constant impact, detecting said vibrations by one or more transducers, amplifying and digitising the transducer output and microrocessor-processing the digitised output to give an indication of disconformity or decay. One embodiment utilises the comparison of the first half-cycle surface vibrations and shear vibrations. Another embodiment …
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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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.