Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 112
stened in place. Springs arefrequently used to keep the paper, tracing, etc., against the glass,With some frames it is more convenient to turn them over andremove the backs. In such cases the tracing is laid against theglass, face down; the coated paper is then placed on it with thecoated side… … CIRCULAR BLUE PRINTING MACHINE. GENERAL ELECTRIC CO. MECHANiCAL DTIAWINQ Si If the paper hag been recently prepared and the exposure properlytimed, the coated surface of the paper will now l)e of a clear, deepblue color, except where it was covered by the ink lines, where itwill be perfectly white.…
Mechanical engineering
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