Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 28
ring. When the receivers are removed, a springforces the hook upwards making the connection shown insolid lines. This closes the battery circuit which must beopen when the instrument is not in use or the battery willrun down. The talking circuit is now complete from earth, g, throughthe receiver,… … Figure consists of an iron core, B, usually made up of a numberof soft iron wires; and two electrical circuits insulated fromeach other, and terminating in the two pair of binding posts,A and D. Of these two circuits A consists of a short length 26 MODERN ELECTRICAL CONSTRUCTION. of comparatively…
Electrical engineering
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