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 158
ry circuitby means of a small electricmotor acting on a lever which ismade to dip into a cup of mer-cury, thus completing the circuitany desired number of times perrevolution. Such a break iscalled the motcr break. Therotary, or turbine, break hasbeen used very successfully onlarge coils requiring… … Fig. 25. Foucault Mercurj- Break 137 44 W1 RE I .ESS TEl^EG RAPIIY 220 volts, some form of mcrcurv turhiiu interrupter is found to hepreferable. One form of this interrupter is shown in Fig. 26. Dr. Wehnelt of rharh)tten})urg iir/ented, in 1809, a form ofinterrupter for use with induetion coils,…
Electrical engineering
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