Circuit and apparatus for controlling a water softener
CA 1136088 A · Owner: Culligan International Company · Inventors: Rak, Stanley F.; Devale, Donald P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel electronic control circuit which includes a probe for detecting the conductivity in ion exchange materiel in a water softener and wherein the probe includes two pairs of spaced cells which are connected in a bridge circuit and connected so as to close an energizing circuit and latch it until it is time for regeneration and wherein the regeneration is controlled so that it will occur only at those times which are preset as for example, during the night when the regeneration will not interfere with normal use of the water supply.
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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- 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.