Clutch, Electro-magnetic

A clutch or appliance for connecting a shaft to a source of rotary motion while the latter is in action. In one form a disc, in whose face a groove has been formed, which groove is filled with a coil of wire, is attached to the loose wheel, while the shaft carries a flat plate to act as armature. On turning on the current the flat plate is attached, adheres, and causes its wheel to partake of the motion of the shaft. Contact is made by brushes and collecting rings. In the cut, A A is the attracted disc; the brushes, B B, take current to the collecting rings, C. The magnetizing coil is embedded in the body of the pulley, as shown. IMG:8956969607833025625_129F93.jpg: Fig. 93. CLUTCH OF BRUSH LAMP. IMG:8956969607833025625_129F94.jpg: Fig. 94. ELECTRO-MAGNETIC CLUTCH. 130   STANDARD ELECTRICAL DICTIONARY.