CHARGING
INDICATOR		IGNITION AND
LIGHTING SWITCH		 SPARK PLUGS
GROUNDED
THROUGH CASE
CONTACT-STUD LOCK NUT
STATIONARY CONTACT-STUD
MANUAL CONTROL LEVER
BREAKER-ARM
GROUND
CONNECTION		 BREAKER-CAM
STARTING SWITCH AND
REVERSE CURRENT
CUT-OUT		BREAKER-CAM NUT
CONDENSERBREAKER-
CONTACTS
IGNITION
COIL		 BREAKER BOXDISTRIBUTOR
HEAD
BATTERYSECONDARY COIL
PRIMARY COILSAFETY SPARK GAP
GROUND CONNECTION GROUNDED
THROUGH CASE

Circuit Diagram of the Model O Ignition System on the Dodge Brothers Motor Car

Fig. 62. Wiring Diagram, North-East System—on Dodge Car

The ignition switch is so constructed that it produces a reversal of polarity in the distributor circuit each time the switch is turned off and then on again. For this reason there is no necessity of making a distinction between the two wires leading from the distributor to the two switch binding posts marked “Ign. Coil,” because the operation of the system cannot be affected by the transposition of these wires. With this one exception, however, the ignition circuit connections must always be made exactly as indicated in the diagrams, if satisfactory operation of the system is to be maintained.

HIGH TENSION
DISTRIBUTOR TERMINALS
DISTRIBUTOR-BRUSH DISTRIBUTOR-HEAD
DISTRIBUTOR-ROTOR BREAKER-CAM NUT
BREAKER-ARM LOCK WASHERS
VERTICAL SHAFT BREAKER-CAM
VERTICAL SHAFT
BEARING SLEEVE		 STATIONARY CONTACT-STUD
SUPPORT
PRIMARY COIL
TERMINALS
GREASE CUP
COUPLING YOKE
HIGH TENSION
COIL TERMINAL		 HORIZONTAL SHAFT
ADVANCE PLATE
COIL HOUSING VERTICAL SPIRAL GEAR
ADVANCE WEIGHTS
IGNITION COIL HORIZONTAL SPIRAL GEAR

Fig. 63. North-East Distributor—Model O—Ignition

Ignition Distributor. ([Fig. 63]).—The model O ignition distributor is mounted on the right-hand side of the Dodge Brothers engine where it is held rigidly in position by means of four bolts. The horizontal shaft of the distributor is connected directly to the engine pump shaft through a flexible coupling, and runs, therefore, at engine speed. The vertical distributor shaft is driven from the horizontal shaft by means of spiral gears which reduce its speed to one-half that of the engine.

The complete distributor unit consists essentially of three self-contained assemblies: The ignition coil, the breaker box and distributor base assembly which include the automatic spark advancing mechanism. Each one of these three elements is so constructed as to be readily detachable from the distributor unit independently of the others.