Fail-safe device for electronic control circuitry
CA 1192982 A · Owner: Electronics Corporation Of America · Inventors: Bala, John L.; Boswell, Charles R. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fail-safe device is disclosed for removing power from circuitry to be controlled upon the occurrence of an undesired operating condition. The device includes circuitry for generating a fail-safe signal that is normally within a predetermined frequency range unless there is an undesired operating condition. It also includes power control circuitry for supplying power to the circuitry to be controlled only when the fail-safe signal is within the predetermined frequency range. In a preferred embodiment the circuitry for, generating the fail-safe signal includes a programmable computer which regulates the circuitry to be controlled and which unless there is an undesired operat-, ing condition …
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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 September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
- 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.