Fig. 71.
132. Winder. Fig. 71. This shows a winder that can be used for several purposes by arranging different attachments. It will be first described as shown in Fig. 71, where it is being used to wind a bolt magnet. The principal dimensions are shown in the figure. It is made of ¾ in. wood about 3 in. wide, the two outer parts X and Z being nailed to the center one, Y, which is to be held in a vise, or fastened to the edge of a table. A 5⁄16 in. hole should be made through the upper part X and Z at one side of the center, so that a long 5⁄16 bolt can be put through and used as described in [App. 93], if desired. A smaller hole, ¼ in., should be made on the other side of the center for a ¼ in. dowel. The dowel, D, is shown, and this size is a little smaller than the hole in ordinary spools, shown at A and B. One-quarter in. dowels can be made to fit fairly tight into the holes by wrapping paper around them. Five-sixteenth bolts can be screwed into the spool holes, shown by the bolt magnet in Fig. 71. To firmly hold a spool from twisting around upon the dowel-axle, a set-screw, S S, is needed. These are small screws, say ⅝ in. long, No. 5. A small hole should be made into the spool before forcing in the screw. ([App. 25].)
The spools A and B are fastened in this way, by set-screws, to D. The handle, H, is made as in [App. 93], in this case a short stove bolt, S B, being used and screwed into B. Fig. 69 shows a very simple form of handle for all such purposes, which may be used instead of the one here shown. The details of winding on the wire are given under [App. 88].
133. Attachment for Winder. Fig. 72. By using this addition to [App. 93] or 94, almost any ordinary kind of windings can be made. The wooden block, A, may be about 2 in. square and ⅞ in. thick. A set-screw, S, binds it to the dowel-axle, D, which is made to turn by one of the forms of cranks given, and which is held in one of the frameworks. Windings like that shown in [App. 112], Fig. 85, can easily be done with this, the upright part, with the two spools, being screwed right to A of Fig. 72.
Fig. 72.