Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 120
contact devices. The bridge is adjusted to zero by making therheostat equal the resistance of a length of wirebetween the contacts. The drums being then started, each successive PORTABLE TESTING SETS. 97 length passes the contacts and a continuous meas-urement takes place. The distance between… … Fig. 66. peculiar pattern with a telephone receiver as wellas a galvanometer. The adjustable rheostat takes the form of a finewire, under which are marked resistances in vari-ous colors. A stylus 5 is connected to the telephone T asshown in Figs. 67 and 68 and can be touched at 98 ELECTRICAL…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
