Variable electrical resistor with liquid-tight seal
CA 1089045 A · Owner: Allen-Bradley Company Inc. · Inventors: Frey, Sydney W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact electrical control such as a potentio-, meter, a rheostat or a switch includes a housing and a, shaft rotatably mounted within the housing. The housing has a cavity for receiving a resilient annular seal surrounding the shaft, and the shaft is provided with a radial pressure plate that bears against the seal. A rotary assembly composed of resistance or switch elements is mounted on the shaft between the pressure plate and a journaled end of the shaft, and the resistance or switch elements are contacted by stationary contacts held in the housing. The seal is axially compressed between the pressure plate on the shaft and a cavity end wall and, is radially compressed between a …
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 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1997.
- 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.