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 193
Fig. 71. Group of Unit Switches, Westinghouse System is cut off and the air in the cylinder is allowed to escape. The switchis theu opened by the spring. The arc is broken in a magnetic fieldproduced by a magnet the end of which is shown dotted in thefigure. Fig. 68 is a picture of the unit switch… … ^ S! a ^ f^ ^^ ^ ^ ^ • • • 10 • • • • • • • • • • • • ^ • • • Q. • • • ID • • • • ^ • • • • • • • • • • • • • • • • - CVJ K> ^1- IT) ^ N <D Ol 166 ELECTRIC RAILWAYS 71 working parts. Figs. 67 and 68, taken together, should give a clearidea of the operation of the valve. An enlarged view of…
Electrical engineering
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