Brake assurance circuit to preserve proper locomotive operating status
CA 1325264 C · 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 brake assurance circuit via which a magnet valve device is deenergized to exhaust brake pipe pressure independently of the locomotive brake valve device and thereby apply braking any time the proper operating status of the locomotive brake valve is changed after the locomotive is underway. A pressure switch responsive to the cut-in and cut-out setting of the manual selector valve associated with the brake valve senses the locomotive status and connects one of two possible circuits to the magnet valve device in parallel with a primary circuit having a speed responsive switch. Once locomotive movement is underway the primary, circuit drops out and the effective circuit selected by the …
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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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 2010.
- 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.