Ground fault circuit interrupting device with improved integrated circuit power supply
CA 1183252 A · Owner: General Electric Company · Inventors: Howell, Edward K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated circuit ground fault signal processor utilizes a power supply having a first regulated, half-, wave rectified supply voltage section and second DC supply voltage section. Operating current for a fault signal amplifier and charging current for a fault signal integrating capacitor are drawn from the second power supply section on a full-cycle basis. Operating current for a trip threshold detector or comparator and a high frequency oscillator circuit is drawn from the first power supply section for operation on an alternate half-cycle basis.
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 February 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 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.