Vigilance safety control system
CA 1206561 A · Owner: American Standard Inc. · Inventors: Rumsey, Steven C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vigilance safety control arrangement for periodically checking the attentiveness of a trainman. The arrangement includes a pair of capacitive charging circuits connectable to a source of voltage and a pair of resistive-capacitive discharging circuits connectable to an application and indication relay. An electrical toggle switch for periodically connecting one of the pair of capacitive charging circuits to the voltage source and one of the pair of capacitive discharging circuits to the application and indication relay for causing a magnet valve to maintain the brakes of the train in their released position.
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 June 24, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 2003.
- 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.