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 598
uplings,elbows, junction boxes, etc., intended to be installed in a buildingduring construction, and to receive subsequently the conductors,cut-out blocks, etc., for supplying current throughout the building.The tubes are supplied of plain insulating material; or of steel,iron, or brass, lined with… … Fig. 360. Contact Maker. Contact Maker. A device for connecting an electrometer or.other instrument to the terminals of an alternator or transformerunder test for a small fraction of each revolution, and also at anydesired position of the armature in its revolutions. The apparatusis used in…
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