Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 197
709. TWO-POLE OR SHUTTLE-SPOOLARMATURE.—Section of spool with end overwinding; usually made of cast iron. … 710. SHUTTLE ARMATURE, made with soft sheet-iron plates riveted to-gether. The strongest current armaturefor small two-pole generators.
Mechanical movements
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