Circuit tester
CA 1079808 A · Owner: General Electric Company · Inventors: Rhude, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrical circuit tester having hot neutral, and ground terminals adapted for connection to the hot neutral and ground contacts, respectively of a household, electrical receptacle is provided with three glow lamps and three resistors connected in series with the glow lamps, each series combination of a glow lamp and a resistor being connected between a different pair of the terminals. Each glow lamp is shunted by an associated shunt resistor, the shunt resistor serving to lower the voltage across the glow lamp when full line voltage is impressed across a series combination of that glow lamps and any one other glow lamp.
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
- Granted June 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 1997.
- 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.