Electrical measuring instruments : grand prize Louisiana Purchase Exposition, St. Louis, 1904 (1904)
Leeds and Northrup Company · leaf 12
ortance, since both forms of resistance>tandards are to be found in most laboratories. The four ends of each pair of copper bars are also provided with mas-sive binding posts which may be used to clamp resistances which are usedas shunts. The remaining shorter copper bars which form the… … htTAiis OF Con. The commutator switch, which f»ccupies a central position over thel)ase, is of very simple construction, of symmetrical form and effectsthe interchange of the coils by a single half revolution. Three mercury cups near the front are provided for putting in cn-cuit either one of the…
