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:
Apr. 15, 1997
Filed:
Sep. 25, 1995
Vincent Ferri, Pittsburgh, PA (US);
Westinghouse Air Brake Company, Wilmerding, PA (US);
Abstract
Method and apparatus to enable a computer to determine which of two types of transducer systems in a fluid pressure communication conduit the computer is connected to. One system includes two pressure transducers attached to pressure taps in the conduit, the outputs of these being subtracted in the computer to obtain a pressure difference. The other system includes a differential pressure transducer to measure pressure difference between the two pressure taps. The computer makes a determination as to which of the two systems it is connected to by identifying a time when the airflow in the conduit is zero, and at that time comparing the output of the transducer which may be either one of two types with a voltage level corresponding to zero pressure for a pressure transducer, and a voltage level corresponding to zero flow for a differential pressure transducer.