Search results
Results from the WOW.Com Content Network
t. e. The Combahee River Collective (CRC) (/ kəmˈbiː / kəm-BEE) [ 1 ] was a Black feminist lesbian socialist organization active in Boston, Massachusetts, from 1974 to 1980. [ 2 ][ 3 ] The Collective argued that both the white feminist movement and the Civil Rights Movement were not addressing their particular needs as Black women and more ...
An interlocking system is designed so that it is impossible to display a signal to proceed unless the route to be used is proven safe. Interlocking is a safety measure designed to prevent signals and points/switches from being changed in an improper sequence. For example, interlocking would prevent a signal from being changed to indicate a ...
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 ...
Intersectionality, matrix of domination, controlling images. Patricia Hill Collins (born May 1, 1948) is an American academic specializing in race, class, and gender. She is a distinguished university professor of sociology emerita at the University of Maryland, College Park. [1] She is also the former head of the Department of African-American ...
Contents. List of streetcar systems in the United States. This is an all-time list of streetcar (tram), interurban and light rail systems in the United States, by principal city (or cities) served, and separated by political division, with opening and closing dates. It includes all such systems, past and present; cities with currently operating ...
Westlock Interlocking. WESTLOCK Interlocking is a Computer-based interlocking (CBI) product now sold and maintained by Siemens Mobility Limited, following their purchase of Westinghouse Rail Systems. Westlock builds on many of the features that made SSI popular in the United Kingdom. This includes re-use of SSI's programming language and its ...
The diagram from Beard's 1897 coupler patent [1]. Janney couplers were first patented in 1873 by Eli H. Janney (U.S. patent 138,405). [2] [3] Andrew Jackson Beard was amongst various inventors that made a multitude of improvements to the knuckle coupler; [1] Beard's patents were U.S. patent 594,059 granted 23 November 1897, which then sold for approximately $50,000, and U.S. patent 624,901 ...
The Loch Ness Monster is the only remaining roller coaster in the world with interlocking loops. In addition to the interlocking loops, located over one of the park's water features, the design includes a helix tunnel, two lift hills, and a 114.2 ft (34.8 m) drop. Upon opening, the Loch Ness Monster received generally positive reviews.