Electromagnetic contactor with discriminator for determining when aninput control signal is true or false and method
CA 1306047 C · Owner: Westinghouse Electric Corporation · Inventors: Engel, Joseph Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
53,663, ABSTRACT OF THE DISCLOSURE, Long conductors which interconnect control pushbuttons such as STOP, START and RESET pushbuttons to the basic control circuit for an electromagnetic contactor or controller often have distributed capacitance between parallel lines in a common cable. This distributed capacitance may conduct capacitive current from the power supply line to a parallel control line the control pushbutton of which is in the off state. However, this latter current interacts with high impedance in the control circuit for producing a voltage which may be of a magnitude which would otherwise be supplied by an ON pushbutton. A microprocessor periodically samples the voltages and …
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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 2009.
- 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.