Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 366
riation by altering the reluctance ofthe magnetic circuit of the machine so as to weaken or strengthenthe magnetic field. The principal parts of this machine are shownin Fig. 102, a portion of the illustration being in section. The endof the armature shaft on which the commutator is mounted… … Fig. 102. Part Section of Reliance Adjustable Speed Motor compression spring surrounding the lever rod always balances themagnetic pull that is exerted by the poles on the armature core.The armature core is slightly tapered, the commutator end beinglarger in diameter than the other end, and the…
Electrical engineering
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