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 495
nd, the heat gen-erated causes the air in the bulbto expand, forcing the liquid downin that branch of the U and up inthe other, from which it passesinto the overflow tube. A scale placed behind the overflow tube is calibrated to show the maxi-mum amount of current which has passed through the… … Diagram of Wright DemandIndicator 451 154 ELECTRICAL T^IEASUREMENTS contraction in both bulbs and does not affect the reading. The tubeis mounted on a suitable hinged support so that it can be tipped upto restore the liquid to its zero setting. To prevent the accidentaltransfer of air from one bulb…
Electrical engineering
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