central battery apparatus
1Emergency power system — Emergency power systems are a type of system, which may include lighting, generators and other apparatus, to provide backup resources in a crisis or when regular systems fail. They find uses in a wide variety of settings from residential homes to …
2cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …
3Charles Grafton Page — (January 25, 1812 in Salem, Massachusetts – May 5, 1868 in Washington, D.C.) was an American electrical experimenter and inventor, physician, patent examiner, patent advocate, and professor of chemistry. Charles Grafton Page …
4Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 …
5Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… …
6Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
7Lancaster, Pennsylvania — This article is about the city. For the county, see Lancaster County, Pennsylvania. For the neighboring township, see Lancaster Township, Lancaster County, Pennsylvania. Lancaster   City   City of Lancaster …
8Ignition system — For other uses, see Ignition system (disambiguation). An ignition system is a system for igniting a fuel air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used …
9telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… …
10Edison, Thomas Alva — born Feb. 11, 1847, Milan, Ohio, U.S. died Oct. 18, 1931, West Orange, N.J. U.S. inventor. He had very little formal schooling. He set up a laboratory in his father s basement at age 10; at 12 he was earning money selling newspapers and candy on… …
