The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 197
re cores make upan armature in which the ridges formed by the teeth form practic-ally driving horns. Droniers Salt. A substance for solution for use in bichromatebatteries. It is a mixture of one-third potassium bichromate andtwo-thirds potassium bisulphate. It is dissolved in water to makethe… … The Magic Drum. released by a current passing through an electro-magnet. Thisattracting an armature lets the drop fall. As it falls it closes a localor second circuit, and thus may keep a bell ringing until it is STANDARD ELECTRICAL DICTIONARY. 193 replaced by hand. It is used in burglar alarms,…
Electricity
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