Switching circuit for a refrigerator control
CA 1285045 C · Owner: Janke, Donald E. · Inventors: Janke, Donald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An AC voltage motor switching circuit for a refrigerator control has a temperature responsive portion connected to provide gate current to an SCR which is connected with a reverse-poled diode to form a parallel combination which together are in series with the AC motor and a charging capacitor. When the SCR is gated on, the SCR conducts positive half-waves of the voltage source and the diode conducts negative half-waves causing the capacitor to become an AC reactance device and, thus, the motor to be energized. When the SCR is gated off only the negative half-waves of the, AC signal are capable of being transmitted through the diode which fully charges the capacitor and prevents current …
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 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 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.