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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 ...
An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may consist of any electrical or mechanical devices, or systems. In most applications, an interlock is used to help prevent any damage to the machine or to the operator handling the machine.
Insulating concrete form or insulated concrete form (ICF) is a system of formwork for reinforced concrete usually made with a rigid thermal insulation that stays in place as a permanent interior and exterior substrate for walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked (without mortar) and filled with ...
The interlock device is located inside the vehicle, near the driver’s seat, and is directly connected to the engine’s ignition system. [1] It is a form of electronic monitoring . An ignition interlock interrupts the signal from the ignition to the starter until a valid breath sample is provided that meets maximal alcohol guidelines in that ...
Solid State Interlocking. A GEC-manufactured SSI interlocking cubicle. Solid State Interlocking (SSI) is the brand name of the first generation processor-based interlocking developed in the 1980s by British Rail's Research Division, GEC-General Signal and Westinghouse Signals Ltd in the UK.
Guastavino tile vaulting in the City Hall station of the New York City Subway Guastavino ceiling tiles on the south arcade of the Manhattan Municipal Building. The Guastavino tile arch system is a version of Catalan vault introduced to the United States in 1885 by Spanish architect and builder Rafael Guastavino (1842–1908). [1]
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 ...
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 ...