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:
Jan. 29, 1985
Filed:
Sep. 20, 1982
Applicant:
Inventor:
Steven C Rumsey, N. Huntingdon, PA (US);
Assignee:
American Standard Inc., Wilmerding, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
303 19 ; 303 20 ;
Abstract
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.