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Reuben Berkley Benjamin and his Benjamin Electric Manufacturing Company was a Chicago, Illinois electrical company founded in the late 19th century. The company was founded by Reuben Berkley Benjamin, and filed its first patent for an electric lamp socket in 1898. The company went on to manufacture various other electrical products. One of Benjamin's most notable products was their series of non-contact fire alarm horns, introduced in the early 1920s. They were available in flush-mount, single, and double projector versions, in either red or gray. These horns were mainly used by IBM, and later SimplexGrinnell up until the 1960s. In 1958, Benjamin was bought out by Thomas Industries, Inc. The company's factory in Illinois was closed in 1963, and was replaced with a new light fixture plant in Sparta, TN. Biography of Reuben Berkley Benjamin and background history of Benjamin Electric Manufacturing Company / Benjamin Electric, Ltd. London Citation and summarization from: • 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Benjamin Electric Manufacturing Company」の詳細全文を読む スポンサード リンク
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