The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · 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 BIvKCTRICAIy DICTIONARY. 193 replaced by hand. It is used in burglar alarms,…
Electricity
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
