D.c. voltage supply circuit for fluorescent lamps
CA 1284815 C · Owner: Hasemann, Fred · Inventors: Wittig, Norbert; Mertens, Ferdinand; Hasemann, Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
DC Voltage Supply Circuit for Fluorescent Lamps The d.c. voltage supply circuit comprises a flyback converter (13') whose inductivity (16) is alternatingly charged through an electronic switch (T2) and discharged via a diode (17) onto a capacitor 118). The output voltage (UA) of the flyback converter is continuously monitored. If a threshold value is exceeded, the switch (T2) mounted in an input line of the flyback converter is changed into the off-state. The off-state is terminated as soon as the output voltage has again fallen below the threshold value. Due to the d.c.voltage supply circuit loads requiring, a specific d.c.voltage may be connected to different, supply voltages without the …
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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 June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- 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.