Control device having automatic switch opening means and method of making the same
CA 1049116 A · Owner: Robertshaw Controls Company · Inventors: Weekes, Donald F.; Sim, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control device having an electrical switch and a condition responsive fluid operated unit for opening the switch when the fluid operated unit senses a certain condition. A lever is arranged in the control device to cause the switch to automatically open should the fluid operated unit lose a certain amount of its fluid.
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 February 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 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.