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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952.
To heighten interest in the sign, lighting patterns would be changed from time to time by selecting different sequences from the 120 available displays. [15] A Westinghouse Prodac 50 computer controlled the sign, since it was well-suited to handling repetitive tasks. An animation representing one possible lighting sequence of the Westinghouse Sign
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
1884 – George Westinghouse begins developing a DC electric lighting system; 1885 – Westinghouse becomes aware of the new European transformer based alternating current systems when he reads about them in the UK technical journal Engineering [35] 1885 – William Stanley, Jr., working for Westinghouse, develops the first practical AC ...
Westinghouse's electric business directly competed with Thomas Edison's, who was promoting direct current (DC) electricity. Westinghouse Electric won the contract to showcase its AC system to illuminate the "White City" at the 1893 Columbian Exposition in Chicago. The company went on to install the world's first large-scale, AC power generation ...
The first public demonstration of outdoor electrical lighting in the US was in Cleveland, Ohio, on April 29, 1879. [1] [8] Inventor Charles F. Brush had been perfecting the dynamo arc light, which could produce a glow equivalent to 4,000 candles in a single lamp. [8]
A collection of 2024 holiday catalogs are displayed Monday, Nov. 25, 2024, in Freeport, Maine. Catalog retailers, reeling from U.S. postal rate increases, have responded with pint-sized catalogs ...
The "other" category included images of a guest book signed by visitors to the Westinghouse pavilion at the 1964 fair. Signers received tin pins, about 1.2 inches (30 mm) across (roughly the size of an American fifty-cent piece), stating, My name is in the Westinghouse Time Capsule for the next 5,000 years. [21]
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