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 348
Coil in DArsonval Type Instrument r tion. To be on the safeside the period of swingshould be large. Galvanometers which are suitable for measuringdischarges are called ballistic. Depending on circumstances,their period may be between, say, 5 and 20 seconds for the com-plete swing. The DArsonval… … Courtesy of Keystone Electrical Instrument Company,Philadelphia 312 ELECTRICAL MEASUREMENTS 17 Damping of Galvanometer Swings. It is often essential that themotion of the moving system of a galvanometer be slowed down, ordamped, so that it may quickly come to rest. This may be accom-plished either…
Electrical engineering
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