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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... the heading of Troubles with the Pedal Switch. Part m THE ELECTRIC LIGHTING SYSTEM CHAPTER VII THE FORD ELECTBIC LIGHTING SYSTEM First Aid to the Lights.--(1) When the lights go out see that both lamps are good. (2) When the lamps are dim try: (a) Running the engine faster. (b) Using lamps of a smaller voltage. (c) Having the magneto deliver its full output. (3) If the light is too bright at low speed use lamps of higher voltage. About Regular Generators.--In the second chapter I explained how a generator is built and, you will remember, I said that when the coils of wire on the armature cut through the magnetic field, currents are induced in the coils, that is, set up in them. In the generators described electromagnets are used for the fields, that is, the soft iron cores ar0 wound with wire and when a direct current flows through the latter it energizes the primary and makes magnets of them. Now if an armature is made to rotate between the poles of a permanent steel magnet the result is the same as when electromagnets are used except that the currents would not be as strong nor can the current output be regulated except by changing the speed of the generator. The Ford Magneto Generator.1--The Ford magneto is built on the above principle but it is made even simpler, for instead of having the coils of wire wound on a rotating armature there are 16 coils wound separately on spools and each one has a soft iron core of its own. These coils are connected together and fixed on a disk, as shown at A in Fig. 33. The disk on which the coils are mounted is slipped over the crankshaft of the engine and is secured to the frame of it. The field is built up of 16 permanent steel horseshoe magnets which are also mounted on a disk, as shown at B, and this is fixed to the...
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