Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 165
d Steel Test-ing, [c. V. D.] Ringing Battery, the battery used in atelephone exchange for calling subscribers byringing their bells. Ringing Circuit, in a telephone ex-change, the circuit through which the cur-rent passes which rings the subscribersbell. Ringing Key, in a telephone exchange,the key… … Collector Kings machine (or else directly on a sleeve on theshaft), and insulated from the spider or shaftand from one another. Collector rings forma means of conveying current to and fromthe rotating part. In an internal revolving-field type of alternator a pair of rings, asshown in the…
Electrical engineering
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
