Handy man's workshop and laboratory . Fig. 22i—Cottondamper Fig. 222—Coil windingform winding for the stator, which consists of four copper dampersand four coils of wire. The copper dampers are shown in detailin Fig. 221. Each one can be cut from a solid piece of coppersheet yi inch thick, or they may be built up of several thinnerpieces having the same total thickness. If the latter method be HANDY MANS WORKSHOP AND LABORATORY 275 adopted, the small pieces should be soldered together after theyare finished, so that they can be handled as single units. Figs. 222 and 223 show the winding form f
Handy man's workshop and laboratory . Fig. 22i—Cottondamper Fig. 222—Coil windingform winding for the stator, which consists of four copper dampersand four coils of wire. The copper dampers are shown in detailin Fig. 221. Each one can be cut from a solid piece of coppersheet yi inch thick, or they may be built up of several thinnerpieces having the same total thickness. If the latter method be HANDY MANS WORKSHOP AND LABORATORY 275 adopted, the small pieces should be soldered together after theyare finished, so that they can be handled as single units. Figs. 222 and 223 show the winding form for making the statorcoils. This consists of three blocks of wood held together by abolt and revolved in the lathe by gripping the bolt head in the. Fig. 223—Coil winding form and partly taped coil chuck. The central block, measuring % by 2 by 2% inches, isbest made of a piece of hard wood, such as maple or mahogany,and it must be quite accurate in each of its three dimensions, sincethese fix all of the dimensions of the coils. The four corners ofthe block must be very slightly rounded, to avoid the difficulty 276 HANDY MANS WORKSHOP AND LABORATORY of having to bend the first turns of wire around square two pounds of No. 21 single cotton-covered magnet wireis required for the four coils. Each coil is to have 165 turns,put on in close, even layers. The number of turns is so impor-tant that it is not well to trust to the mind to keep tally whilewinding. Set the gears to feed at some convenient rate, say tenthreads per inch, and run the tool carriage to the extreme right-hand end of the bed and make a chalk mark on the bed at thatposition. Then, when the winding is started, throw in the screwfeed, and the movement of
Size: 1411px × 1772px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
