Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 24
tia. (4) It should be easily, conveniently, and safely attachable and unmov-able and handily manipulated. (5) Stiffness, lightness, and exactness of standardization are primeessentials. Springs should be exactly standard. Moving parts as light asconsistent with proper strength and stiffness;… … Fig. 8. Spring Testing Device some means must be employed for testing indicator springs. A verysimple but efficient apparatus for testing indicator springs is shownin Fig. 8, which consists of a drum A, made of 4- or 5-inch extraheavy pipe having steam-tight joints. Steam is admitted to thedrum at…
Indicators for steam-engines · Steam-engines
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