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 226
Fig. 151. Interlocking Electro-magnets. armature M, coming against the tooth projecting from its periph-ery. A momentary current through the coils of the magnet AA releases it, by attracting M^ which is caught and retainedby jV, and leaves it free to rotate. A momentary currentthrough the coils of…
Electricity
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