. Scientific American Volume 74 Number 14 (April 1896). paration of hollowware is here adapted to the manufacture of bicyclewheels. The next process is to cut out the center of theblank, by which operation it is converted from its dishor plate like form to that of a circle, and begins tohave some sort of resemblance to a wheel rim. Thecutting out of the centeris done in a lathe having apair of revolving shearsmounted on a slide inside cutter isbrought up until it justtouches the work, and thecutter on the other side isthen pressed home by alever. The partly formedrim is then brought t
. Scientific American Volume 74 Number 14 (April 1896). paration of hollowware is here adapted to the manufacture of bicyclewheels. The next process is to cut out the center of theblank, by which operation it is converted from its dishor plate like form to that of a circle, and begins tohave some sort of resemblance to a wheel rim. Thecutting out of the centeris done in a lathe having apair of revolving shearsmounted on a slide inside cutter isbrought up until it justtouches the work, and thecutter on the other side isthen pressed home by alever. The partly formedrim is then brought to therequisite section by a num-ber of spinning fellies are com-posed of two separaterings, which are ultimate-ly soldered are known as theblock and tread, each ofwhich is prepared in thesame general manner, foreach has to be brought toa shallow U-section,though the block or innerring is a deeper U thanthe tread, or outer ling,against which the Indiarubber tire abuts. Theblock, it will be under-stood, is that part which. PRESS FOR HAEIXG STEEL BICYCLE RIMS. is drilled to take the spokes. We are now describingroughly an ordinary form of rim for pneumatic are many special forms required for varying de-scriptions of tires, but the same principle of construc-tion governs all. When the central part of the dish-shaped blank was cut out, as described, a ring some-what of Z-section was left, or more correctly speaking,of the section of an angle bar and reverse angle, thecorner of one angle having been previously roundedoff. By means of the various spinning lathes, oneangle is gradually turned over, and, during successiveoperations, the corners are rounded off to form the chief point of interest about these lathes is themethod of chucking. In one series of operations alarge split chuck is used, the work being held by itsinner flange between two disks. The spinning tool is
Size: 1239px × 2016px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectcivilse, bookyear1896
