The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Feb. 22, 1985
Robert J Worbois, N. Huntingdon, PA (US);
American Standard Inc., Wilmerding, PA (US);
Abstract
A penalty brake control system for a railway vehicle equipped with a straight air-type brake valve device is arranged so that failure of the vehicle operator to indicate his alertness and/or well-being by maintaining a foot valve pedal depressed results in an automatic penalty brake application. Pressure in a volume reservoir exhausts through a whistle to evoke a warning of an impending penalty brake application any time the foot valve pedal is released. When the volume reservoir pressure drops below a first predetermined value, an interlock pilot valve is operated to connect the volume reservoir pressure to exhaust at the brake valve device. A penalty pilot valve subject to volume reservoir pressure initiates a penalty brake application when the volume reservoir pressure drops below a second predetermined pressure. Brake application pressure in excess of this second predetermined pressure is connected to the penalty pilot valve in parallel with the volume reservoir pressure to suppress the penalty application of a brake application is in effect through the normal brake circuit.