Knights American Mechanical Dictionary

Knights American Mechanical Dictionary component of 520 nokia manual

Knight's American Mechanical Dictionary: Being a Description of Tools, Instruments, Machines, Processes, and Engineering; History of Inventions; ... Appliances in Science and the Arts, Volume 1

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  • This article and its illustration are adapted from “Knights American Mechanical Dictionary” by Edward H. Knight, published by Hurd And Houghton, New York, in 1877. (From: ).

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  • Left: Roots Square Piston Engine: internal workings.

    The large piston E moves horizontally. The smaller piston F moves vertically inside E.

    T is the cover plate for the engine, incorporating a circular valve-box I, closed by a plate screwed over it. Steam is supplied via the valve K at the top, and passes to the valve-box by a passage not visible here. It enters the "cylinders" via ports G when they are uncovered by the valve disk X. The exhaust leaves through the same ports and enters the annular channel M and escapes through the passages shown dotted, which feed into a common exhaust duct.
    The valve-plate X is fitted to an eccentric L on centre-pin D, and is carried round by a pin S on the end of the crank, so that it rolls around the inside of the circular valve-box, opening and closing the ports as it passes.

    From Knights American Mechanical Dictionary, 1880.

Knight's American mechanical dictionary