|
Title: |
1903 Article-Luke & Spencer, Ltd., Dynamo Commutator Grinder |
|
Source: |
Emery Grinding Machinery, 1903, pg. 151 |
|
Insert Date: |
11/7/2015 4:58:54 PM |
|
Commutator grinding.—The heavy wear and tear that occurs between the commutator of an electrical dynamo machine and its brushes, due to the excessive friction that takes place between the two brushes and the commutator, frequently necessitates the removing of the whole armature of the dynamo machine to enable it to be fixed up in a lathe so that the grooves and unevenness of the commutator may be removed therefrom, leaving the commutator perfectly cylindrical and parallel. To obviate the necessity of frequently disconnecting the dynamo for this purpose, the dynamo commutator grinding apparatus, fig. 123, has been designed. The arrangement, as will be seen from the illustration, is an exceedingly compact and useful tool to the electrical engineer. It consists of a strong cast iron pedestal for bolting on to the dynamo bed, and a compound slide rest with swiveling arrangement for bringing the grinding wheel into position. The attachment carries an emery wheel 10 inches in diameter by 1½ inch thick, carefully mounted and balanced between washer plates. The steel spindle is carried in an adjustable bearing, and the spindle is provided with lock nuts to take up any lateral wear. The fast pulley is 4¼ inches in diameter and 2 5/8 inches wide between the flanges. |
|
1903 Luke & Spencer, Ltd., Dynamo Commutator Grinder
|
|