| 3⁄8 LOOM | No. 14No. 10 | 3⁄8 LOOM | No. 14No. 10 | 1⁄4 LOOM | ||
| No. 14 | ||||||
| RIGHT HEAD LIGHT | TERMINAL POSTS | FUSES 10 AMPERES | ||||
| NEGATIVE | ||||||
| STORAGE BATTERY | ||||||
| GENERATOR | MAGNETO | POSITIVE | ||||
| SWITCH | ||||||
| CYLINDERS | BATT -LIGHTING SWITCH | No. 14 | ||||
| No. 14BATT + | TONNEAU LIGHT | |||||
| GROUND | No. 10 | GROUND FUSE | ||||
| MAGNETO SWITCH | ||||||
| No. 18 DUPLEX | No. 14 | |||||
| DASH & EXTENSION LIGHT | ||||||
| No. 10 | ||||||
| AMMETER | No. 0 | |||||
| HORN BUTTON | REAR LIGHT | |||||
| HEAD LIGHT | MOTOR | STARTING SWITCH | ||||
| HORN | ||||||
| 25⁄8 LOOM | ||||||
Fig. 89. Wiring Diagram—Jeffrey-Chesterfield Six
As a battery becomes charged its voltage increases reducing the difference in pressure between the generator and battery and decreasing the charging current to the battery.
ELECTRIC STARTING AND LIGHTING OPERATION
Current from the generator passes through an ammeter and this meter shows the current being supplied to the battery and the lights, or to the battery only when no lights are in operation.
Starting Motor.—The starting motor is provided with a square shaft and carries a pinion which can be moved horizontally on this shaft. This pinion meshes directly with teeth cut on the flywheel.
The starting pedal located at the driver’s seat connects through linkage to fork which shifts the link on the square shaft of the motor. The same foot pedal linkage operates the starting switch. Normally a spring holds the motor pinion out of mesh with the flywheel teeth, and also holds the starting switch in an “off” position.
Operation of the Starter.—Depressing the starter, one pedal operates the starting switch and makes a preliminary contact which connects the starting motor to the storage battery through a resistance located inside of the starting switch. This resistance permits a small amount of current to pass through the starting motor, causing its armatures to rotate at relatively slow speed. This slow rotation insures proper meshing of the pinion and flywheel teeth when they are brought into engagement. Depressing the foot pedal also shifts the pinion on the square shaft of the motor so as to bring it into contact with the teeth on the flywheel.
When the pinion is in full mesh with the teeth on the fly, the moving contact in the starting switch has traveled to a position where the resistance is cut out of the circuit, connecting the storage battery directly to the starting motor. The starting motor will then spin the gas motor.
Starting.—First see that the necessary adjustments have been made, then depress the starting foot pedal as far as it will go and hold it firmly in place until the gas motor starts. The instant the gas motor begins firing the foot pedal should be released. The starting pedal should be pressed as far as it will go without any pausing on the downward stroke.