Temperature-responsive controller for waterbed mattress heaters
CA 1270508 C · Owner: Miles, Floyd D. · Inventors: Miles, Floyd D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controller for an electric resistance waterbed mattress heater supplied with electric current by an elongate power cord extending between the heater and a power service outlet. The controller includes a small diameter elongate cylindrical housing in which an adjustable on and off switch is mounted and into which the cord is extended and connected with the switch. The switch includes a Bourdon tube to actuate the switch between opened and closed positions when the tube is caused to deflect by changes of pressure therein. A capillary tube is connected with and extends from the Bourdon tube to the exterior of the housing and about which it is formed and supported. An adjusting knob is …
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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 June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
- 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.