Fault sensing wire and alarm apparatus
CA 2313092 A1 · Owner: Morris, Shelby J. Jr. · Inventors: Morris, Shelby J. Jr.; Watkins, Kenneth S. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fault sensing electrical wire (411) utilizes one or more sensor strips (407) which provide an impedance change when the wire is subject to an overtemperature condition or mechanical damage of the wire. A control unit (402) measures the impedance of the sensor strips of the fault sensing wire and provides a control signal (405) to initiate an alarm or protective action based on the severity of the condition. The control unit (402) may monitor a number of fault sensing wires simultaneously or in sequence. The apparatus may be used to sense an electrical arc occurring in the insulation of the wire.
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 December 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2020.
- 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.