Union Switch & Signal
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Union Switch & Signal Inc. was an American company based in Pittsburgh, Pennsylvania, which manufactured railway signaling equipment, systems and services. The company was acquired by Ansaldo STS in 1
US&S head office located in Swissvale, Pennsylvania, as seen in 1929
US&S signal bridge, pictured in 1913
US&S position light signal, 1922
Mechanism of a searchlight signal made by Union Switch & Signal in 1944 for the Rock Island Railroad
The Westinghouse Air Brake Technologies Corporation was an American company founded on September 28, 1869 by George Westinghouse in Pittsburgh, Pennsylvania. Earlier in the year he had invented the ra
Union Switch & Signal
…to obtain the latter company's patents for searchlight signals. US&S operated as an independent company until 1917, when it became a subsidiary of the Westinghouse Air Brake Company (WABCO). In 1968, American Standard purchased WABCO and reorganized US&S as a separate division. In 1988, Ansaldo STS, a global supplier of signaling…
The Westinghouse Building in Wilmerding, Pennsylvania, pictured in 2009
Westinghouse Air Brake Company's Rotair Valve