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birney : ウィキペディア英語版
birney

A Birney or Birney Safety Car is a type of streetcar that was manufactured in the United States in the 1910s and 1920s. The design was small and light and was intended to be an economical means of providing frequent service at a lower infrastructure and labor cost than conventional streetcars. Production of Birney cars lasted from 1915 until 1930, and more than 6,000 of the original, single-truck version were built.〔Middleton, William D. (1967). ''The Time of the Trolley'', pp. 122–127, 210, 414. Milwaukee: Kalmbach Publishing. ISBN 0-89024-013-2.〕 Several different manufacturers built Birney cars.〔 The design was "the first mass-produced standard streetcar (albeit with minor variations)" in North America.
==Invention==

The Birney car was the joint 1915 invention of Charles O. Birney and Joseph M. Bosenbury (who was issued the patents in 1917 and 1919, and assigned half to Birney; see Brill page 140). Birney was an engineer with the firm of Stone & Webster, an operator of a number of trolley systems in the United States in the early part of the 20th century. The design was named the "Safety Car", and became known as the "Birney Safety Car" and ultimately simply as the "Birney" car.〔
The vehicle was a return to single-truck (single-bogie) streetcars. Birneys were small and light, about a third the weight of conventional cars of the period; were of rugged, standardized construction; mass-produced and inexpensively built. Twin motors gave them nimble acceleration. Birney cars averaged about in length and typically had seating for about 32 passengers.〔
The largest producer of Birney Safety Cars was the American Car Company, a subsidiary of J. G. Brill, but several other companies also manufactured Birneys.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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