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tends to stand still and is drawn by the worm along the sleeve and into mesh with the gear which is cut upon the flywheel. The starting switch is a very simple fitting, designed especially for use with the automatic pinion shift. The combination lighting and ignition switch has two removable keys, that at the left controlling the lighting service and on the right the ignition circuit. The lighting switch. has three positions. One in which all lights are off, a second in which the dash light is bright and the tail lights
Fig. 241.-Wiring Diagram Showing Circuits of Remy-Oakland Starting,
Lighting and Ignition System.
and head lights are dim and a third position in which all lights are bright. The cutout relay regulator used in connection with this system is also shown at Fig. 239 with the cover removed. The cutout operates on the same principle that has been previously described and acts merely to prevent discharge of the battery through the generator when the engine is not running. The contact points of the cutout are held together only as long as the voltage of the generator is in excess of the battery voltage.
The regulator portion consists of an electro magnet, an arm
operating on hardened bronzed pivots; two sets of contact points, two of which are mounted upon springs and a resistance unit. When the generator is running at a speed lower than that required for maximum output the regulator contact points are held together by a spring under the arm and the current supplied to the generator field passes directly through these points. As soon, however, as the speed of the generator increases to such a point that the output rises above the predetermined maximum, the charging current which is flowing through the coil on the electro magnet energizes it to such an extent that it pulls the arm down. This pulls the contact points apart and forces the field current which had heretofore been passing through these points to pass through the resistance unit. The resistance decreases the field current which in turn diminishes the output of the generator. As this reduces the energizing effect of the electro-magnet, the spring forces the contact points together and the resistance is cut out of the field circuit. A continuous repetition of this operation sends a pulsating current to the generator field and holds the output of the generator at practically a constant value. For the purpose of protecting the generator, an easily accessible fuse is fitted to the relay regulator base. In case the battery should become disconnected, either through accident or neglect, this fuse will burn out, rendering the generator inoperative and damage proof. The wiring diagram presented in technical form of the Remy-Oakland 32 system is shown at Fig. 241. In view of the explanations that have been previously give no difficulty should be experienced in tracing the various connections, especially if the wires are compared with those on Fig. 240, which show the connections to the units comprising the system but not the internal connections of the units.
Another Remy Starting and Lighting System uses the model 165 ignition generator which is shown at Fig. 242. This includes a standard magneto distributor and circuit breaker and forms a single unit from which current for lighting, ignition and starting is obtained. The ignition generator carries the full lamp and ignition load of approximately 712 amperes at a car speed of from 10 to 12 miles per hour. The output of this generator is regulated by the well known third brush system. At low speeds the magnetic
flux of a generator is evenly distributed along the basis of generator pole pieces, but at high speeds it becomes destroyed. The third brush which supplies current to the generator field winding is so located in relation to the main line brush of opposite polarity that this distortion of the magnetic flux reduces the current which it supplies to the field winding. This decrease of field current naturally causes a decrease in the output of the generator and prevents it from attaining a harmful value. The only external regulating device used is a reverse current relay to prevent the storage battery discharging back through the generator. The current for ignition is taken from the storage battery and is passed through the induc
tion coil before it is delivered to the distributor of the generator. The complete Remy lighting, starting and ignition system used on the Reo car is shown at Fig. 243. This diagram is especially valu. able inasmuch as it not only shows all circuits but also the size of the wires needed to connect the various units together.
In connection with the Remy-Oakland system it is stated that
the ignition switch must be placed in the "off" position when thi engine is not running. If it is let in the "on" position when the engine is not running, current from the storage battery will be dissipated in the ignition coil and will result in battery exhaustion The battery should never be disconnected while the engine is run ning as this will cause a generator protective fuse on the relay regulator base to burn out. In case this fuse should burn out and an extra one is not available it is possible to proceed without a fuse as the charge in the battery will operate the ignition, lamps
and horns in cases of emergency. A new fuse may readily be made of commercial 10 ampere fuse wire. Six volts, single point Mazda bulbs may be used, but their life will not be as long as 642 or 7 volt bulbs.
Remy Two-Armature Lighting and Starting System.—The electric starting motor and lighting generator on Series AA National cars is the Remy Model 150 six volt system. The electric machine employs two separate armatures and two separate fields, the motor being superimposed upon the generator, although both are in one steel casting, making a neat, compact unit, familiarly