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Allegion plc is an American Irish-domiciled provider of security products for homes and businesses.. Though it comprises thirty-one global brands, including CISA, Interflex, LCN, Schlage and Von Duprin, the company operates through two main sections: Allegion International and Allegion Americas. [4]
Under the trade name Von Duprin (a blend of the three principals names, VONnegut, DUpont, PRINzler) the Von Duprin Safe Exit Device, as it was called, was manufactured and distributed by the Vonnegut Hardware Company. [4] Manufacturing took place in Indianapolis (also in Chicago and Canada in later years).
Electrical equipment installed in such locations can provide an ignition source, due to electrical arcing, or high temperatures. Standards and regulations exist to identify such locations, classify the hazards, and design equipment for safe use in such locations.
Metcalf sniper attack CCTV footage (Attacks begin at around 1:54) Location Coyote, California, U.S. Date April 16, 2013 (2013-04-16) 12:58 – 1:50 a.m. (PDT) Target PG&E Metcalf substation Attack type Sabotage Weapons 7.62×39mm rifles On April 16, 2013, an attack was carried out on Pacific Gas and Electric Company's Metcalf transmission substation in Coyote, California, near the border of ...
Some manufacturers released some 4000-series equivalent CMOS circuits with a 74 prefix, for example, the 74HC4066 [2] was a replacement for the 4066 with slightly different electrical characteristics (different power-supply voltage ratings, higher frequency capabilities, lower "on" resistances in analog switches, etc.).
Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults [citation needed] through the disconnection of faulted parts from the rest of the electrical network. The objective of a protection scheme is to keep the power system stable by isolating only the components ...
Remote annunciator: a device that connects directly to the panel; the annunciator's main purpose is to allow emergency personnel to view the system status and take command from outside the electrical room the panel is located in. Usually, annunciators are installed by the front door, the door the fire department responds by, or in a fire ...
The patent also mentions the possibility of forwarding sound or vision to a security center, or recording them. A pushbutton alarm system to contact police or others is also included. The patent cited other inventors, including Edward D. Phinney and Thomas J. Reardon, as well as RCA's Closed Circuit Television Systems, Book I, pp. 182-186, 1958 ...
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