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In 1901 US&S developed the first electro-pneumatic automatic train stop system for the Boston Elevated Railway. This system was later adopted by the New York City Subway and other transit systems. [12] In 1908 the company introduced an electrically controlled highway crossing gate. [13] In 1923 US&S developed the first inductive train control ...
A wig-wag is a device for flashing an automobile's headlamps, in its simplest form, so only one of the two headlights operates at a time, with the two flashing at a preset rate. In its traditional form a wig-wag emits the right and left headlamps alternately, with each lamp lit for around half a second at a time.
The Magnetic Signal Company was an American company based in Los Angeles, California, focused on railway signalling.The company was the manufacturer of the ubiquitous "Magnetic Flagman" wigwag railroad crossing (or level crossing) signal, seen all over California and the western states.
Wig wag (washing machines), a solenoid design used in some brands; Wigwag, the Canadian version of the English Curly Wurly bar; Wigwag, a tool used in watchmaking for polishing parts; WigWag, a Nottingham–based website development and communication company; Wig-wag, a tool used to stack sheets of rubber compound into boxes or onto pallets.
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A typical shock collar. Shock collar used on a riot police dog in 2004 in Würzburg.Two years later, [1] Germany banned the use of shock collars, even by police. [2]A shock collar or remote training collar, also known as an e-collar, Ecollar, or electronic collar, is a type of training collar that delivers shocks to the neck of a dog [3] to change behavior.