Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 891
ring, vul-canized rubber, brown earthenware glazed, same in combination with vulcanized rubber, white por-celain, and baked wood prepared with some resinous compound. Fig. 4097 represents a glass insu-lator, provided with a screw-thread which fits upon a thread cut upon the wooden supporting-pin.By… … TELEGRAPH. 857 average percentage of gla?s insulators broken on the lines of the Western Union Company for aperiod of four years was 6.4. Fig. 4099 is an insulator of whitewood impregnated with a non-conducting compound, and arranged to hold the wire by suspension.
Mechanical engineering -- Dictionaries
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