Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 765
ndicating both visually and audibly the rotation. Theother pointer corresponding to the direction in the opposite rotation will 752 ELECTRICITY IN THE UNITED STATES NAVY. remain still. For twin screws a separate transmitter and receiver is installed for each. A separate mechanical indicator is also… … mm^—m—m^—^^^m^^^ MISCELLANEOUS. 753 Telephones. In the telephone system used there is no Central station; but eachtelephone is provided with a transfer switch, by means of which it can bedirectly connected with the other telephones. An annunciator is providedto show what station has made the call.…
Electrical engineering
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