The Modern bicycle and its accessories; a complete reference book for rider, dealer, and maker (1898)
Schwalbach, Alexander, Wilcox, Julius, Commercial advertiser association, New York · New York, The Commercial advertiser association · leaf 67
uprights is thelifting mechanism, a board being attachedto the hammer and the rolls that revolvein the head act upon this board and liftthe weight by friction. In the base firstmentioned are fastened the lower dies, theupper die being attached to the hammer.In these dies the impression for the… … 46 THE STHARNS. die by the workman, who then operatesthe drop hammer by means of a foottreadle, the hammer with the upper diedropping by gravity and forcing the heatedmetal into the impressions cut in the dies.The surplus metal which has protrudedbetween the lov er and upper dies resemblesa fin or…
Bicycles
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