Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 252
the electrical tramway ser-vice of to-day. The moving element is extremely light, which is animportant feature in a meter for this service. It is also supplied witha special removable pivot for the lower bearing, which runs in a sap-phire jewel, supported upon a spring designed to reduce to a… … Fig. 251Thomson-Houston Electricity Meter The O.K. Meter
Electrical engineering · Electric power
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-157-54.webp)
