Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 42
Fig. 28. — Thomson Recording Wattmeter. rate, were not dead-beat, and required some time beforethe needle, or pointer, would come to rest. The develop-ment of the DArsonval type of instrument with permanentmagnets and movable coil marked a great step in advancein instrument making. Dr. Edward… … mon use, and this has greatly contributed toward electricalprogress. Weston ammeters and voltmeters are providedwith scales with uniform graduations; they are dead-beat;they are small and extremely accurate; theycan be easily transported, repaired, andstandardized; and they have been awardedprizes…
Electricity · Electrical engineering
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