Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 406
394 VAN NOSTRAND'S ENGINEERING MAGAZINE. Fig. 1. Fig. 2, it. The modus operandi is essentially the same — from the heavy car spring, weighing over sixty pounds to the deli- cate hair spring of the watch. Figs. 4. … Elevation. Exhausted. Section. without abrasion; the full and proper power of each coil, being brought into Figs. 4 represent the Vose Graduated Spring for City Railway Cars. It is so construct- requisition, producing easy, elastic and ed that the spiral alone carries the empty car, uniform action…
Engineering
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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