Pressure sensitive transducer
CA 1065642 A · Owner: Bunker Ramo Corporation · Inventors: Johnston, Samuel A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to pressure responsive transducers. The prior art transducer is an unusually compact and effective arrangement for detecting pressure variations and the two diaphragms forming the variable chambers are each soldered or otherwise hermetically secured to a respective electrode on a nonconductive substrate. In the described arrangement, at least one of the diaphragms is pierced, usually along its central axis for formng a vacuum between the diaphragms. The hole in the pierced diaphragm was then required to be soldered or sealed in a vacuum chamber. A problem is created not only by the economics and reliability of the process but also, by the response of the diaphragm due …
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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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 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.