Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 152
Fig. 224.—Connections of a self-startingmercury vapor lamp (Cooper-Hewitt). Fig 225.—Connections of a Moore tubevapor lamp. 7 is a feeder valve which isoperated by a solenoid and maintains theconstant pressure in the tube by admittingmore gas when the vacuum increases. SECTION XIVRHEOSTATS AND…
Electric wiring
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