Nikola Tesla Books
ONE-HALF KILOWATT TRANSFORMER OUTFIT 89 " WIND BOTH PRIMARY AND SECONDARY FASTEN TO WORK BENCH Fig. 5.-Winding machine for both primary and secondary of the fine wire is to be soldered to the tip of the copper ribbon and as the layer of wire is wound, the ribbon is securely held. The layers of wire in the secondary are to be 2 in. wide to leave a margin of 4 in. on either side of the wire. Two turns of oiled paper are taken over each layer of wire before the next layer is wound. The finishing layer of wire is terminated in a second copper ribbon which forms the secondary lead for connection to the high tension terminals. Over the final layer of wire, several layers of oiled paper are wound to form a mechanical protection for the delicate wire. The edges of the coil are well soaked with armalac and the secondary is then ready to mount, after the compound has dried. Assembling and Mounting.-In Fig. 6 the complete. transformer is shown with primary and secondary in place and the remaining core irons in position to complete the magnetic circuit. The space between the winding and the core is to be partially filled with wooden plugs, carefully whittled to fit the space without forcing.
