Documentary journal of Indiana 1882 . velop the details of the work; the manner inwhich the different pieces of wood forming the pattern shallhave the grain lie; where and what allowances are to be madefor warping, shrinkage, finish, etc.; and in what manner dif-ferent patterns of any form should be constructed to draw prop-erly from the sand. I believe that best results can be accomplislied by increasingthe variety, by changing somewhat the woik of each class, andit is not at all necessary that all in the same class should be onwork precisely alike. On the contrary, if different, the studentn
Documentary journal of Indiana 1882 . velop the details of the work; the manner inwhich the different pieces of wood forming the pattern shallhave the grain lie; where and what allowances are to be madefor warping, shrinkage, finish, etc.; and in what manner dif-ferent patterns of any form should be constructed to draw prop-erly from the sand. I believe that best results can be accomplislied by increasingthe variety, by changing somewhat the woik of each class, andit is not at all necessary that all in the same class should be onwork precisely alike. On the contrary, if different, the studentnot only obtains an understanding of his own work but he learnsthe peculiar features in his neighbors. As a result of the prac-tical workings of this plan, after tliree years operations, w^ehave an exhibition of pattern work embracing quite an exten-sive field of application. The appliances for pattern making are the same as used inthe two preceding courses. The work presented below will give a good idea of the course. Fiist 141 This is always a simple pattern which will necessitate themaking of allowances for shrinkage, draft, and finish. It maybe of lathe work or of bench work, or it may be of both. Theball crank and handle shown are fair examples of this crank, which is made in two pieces, is held together for turn-ingbyglue, with paper between the joint. The spherical portionsare made true by use of a template, shaped to the required cur-vature from a thin piece of hard wood. The handle, beingsmaller, is usually made in one piece. Second Exercise.—Flanged Pipe-Fittings.
Size: 2729px × 916px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookiddocumentaryj, bookyear1883
