Power brown-out detector
CA 1067581 A · Owner: Control Data Corporation · Inventors: Norberg, Gayle R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is apparatus which provides a warning or "brownout" signal which indicates a likelihood of low power in an AC wave. This condition is measured by analysis of the peak voltage attained by each half cycle. Every power supply is designed for an AC supply having a nominal peak voltage. Defective or "runt" half cycles are those whose peak is less than a predetermined percentage of nominal peak voltage. In this invention each low voltage, or runt half cycle causes the contents of a counter to be changed by a predetermined value. A preferred level for the peak voltage of any half cycle below which the half cycle is classified as a runt is 90% of nominal. Each time the maximum voltage of …
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 December 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
- 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.