Battery charger and surveillance system
CA 1111104 A · Owner: Hase, Alfred M. · Inventors: Hase, Alfred M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A battery charging apparatus has a control circuit which controls the rate of input of AC power through a synchronous switch -- a saturable core reactor magnetic, amplifier or a pair of anti-parallel silicon controlled rectifiers. The operation of the charger is such that the length of the charging program can be predetermined,and when the charging program is initiated a survelliance system functions to determine that the charging current during the program, and particularly at the end of the program is, within anticipated limits. If the charging current is not within anticipated limits, an alarm indicator is latched on giving the operator an indication of potential battery problems, and/or …
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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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
- 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.