Coin discrimination apparatus
CA 2117056 C · Owner: Coin Controls Limited · Inventors: Hutton, Lesley; Kershaw, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coin discrimination apparatus includes a coin rundown path (4) along which coins roll so as to impact a snubber (8) provided with a piezo electric device (13). The coin impact produces an oscillatory voltage output from the device which is sampled, over a predetermined period for its peak maximum and minimum values. The values are combined in a predetermined relationship to produce a coin parameter signal indicative of coin mass and the material from which it it made. Coin acceptability is determined on the basis of the value of the coin parameter signal.
Read the whole patent
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 April 30, 1992 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2014.
- 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.