Aircraft temperature monitoring
CA 2203447 A1 · Owner: Williams, Brian · Inventors: Williams, Brian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aircraft leading edge overheat systems have temperature-responsive switches connected along the wing and a monitor to detect when any of the switches closes because of overheating. In the present invention, two constant-current sources are connected to opposite ends of a first loop having several series-connected resistors. One terminal of each switch is connected to a junction between different ones of the resistors the other terminal being, connected to a second loop at ground potential. The monitor measures the voltage across opposite ends of the first loop. When overheating is detected a switch closes and causes a, change in the monitored voltage. The monitor provides an alarm to …
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 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2019.
- 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.