The fuse aquot; blows aquot; before such a current can cause harm to the machine. ... used for train lighting purposes in 1920 and its design followed the automobile practice of that time. Its disadvantage as compared with the Rosenberg dynamo is that a pole changer is needed to keep the polarity the same whichever ... The Grab dynamo has its field excited by a coil 278 BATTERY CHARGERS AND CHARGING.
|Title||:||Battery Chargers and Charging|
|Author||:||Robert A. Harvey|