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Scientific American, Vol. 89, No. 20 (November 1903) (1903)

leaf 21

An illustration from Scientific American, Vol. 89, No. 20 (November 1903), 1903, leaf 21
hout vulcanizingthem on. LUBRICATOR.—C. L. Hofmann, Cincin-nati, Ohio. In the present patent the inven-tion is an improvement in lubricators, and es-pecially in that class of such devices for ap-plication to pulleys and the like wherein thepulley revolves on a bearing or shaft and thelubricator…

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