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Union Switch & Signal (commonly referred to as US&S) was an American company based in Pittsburgh, Pennsylvania, which focused on railway signaling equipment, systems and services. The company was acquired by Ansaldo STS (from 2015, Hitachi Rail STS ) in 1988, [ 1 ] operating as a wholly-owned company until January 2009, when US&S was renamed ...
[8]: 18 Ball signals were first used to direct train movements in 1852, on the New York and New Haven Railroad. [2]: 134 Other mechanical signals used during the 19th century include: A 4 feet (1.2 m) disc, painted red and mounted on a revolving pole; it indicated "stop" when positioned to face an approaching train.
Spruce Creek Tunnels, Pennsylvania Railroad, Huntingdon County; Staple Bend Tunnel, first U.S. railroad tunnel, 901 feet (275 m), Allegheny Portage Railroad, Conemaugh Township, Cambria County (abandoned but now part of the historic Allegheny Portage Railroad) [39] State Line Tunnel, Pittsburgh and West Virginia Railway, Washington County [40]
The firm purchased Los Angeles–based Magnetic Signal Company in the late 1940s and moved production to Minneapolis. Magnetic Signal is the company credited with the invention of the wigwag grade crossing signal once common throughout Southern California. "Railroad Accessories Corporation" (RACO) merged with Griswold Signal Company in 1964.
By the 1850s, railroad operating rules, often printed as pamphlets or on the back of a time card, had evolved to near universal application. On April 14, 1887 representatives of 48 railroads voted for the adoption of what is now known as the Standard Code of Operating Rules (SCOR), published by the AAR. Thus, all railroad rule books in North ...
Middletown and Hummelstown Railroad (working railroad, but with emphasis on tourist trains) New Hope Railroad (working railroad that also operates tourist trains) New Jersey Transit Rail Operations (Atlantic City Line commuter train travels from Philadelphia) Oil Creek and Titusville Lines (working railroad, but with emphasis on tourist trains)
A railway detonator, (torpedo in North America) or fog signal is a coin-sized device that is used as a loud warning signal to train drivers. It is placed on the top of the rail, usually secured with two lead straps, one on each side. When the wheel of the train passes over, it explodes, emitting a loud bang.
The company manufactured automatic block signaling systems, disc signals (also called "banjo" signals), a rotating semaphore signal, grade crossing signals, and the first searchlight-style signal. [1] [2]: 52 The company was established in 1871 with main offices in New York City and a factory in Meriden, Connecticut. [3]
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