Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1347
Fig. 615switch board ammeter … Fig. 616 ILLUMINATED DIAL INSTRUMENT _ The instrument shown in Fig. 614 has an extra handending in a ring. This can be set at the voltage it isdesired to maintain. The most hasty glance will then showwhether the voltage is too high or too low. Electro Meters 1313 In order to save space on…
