International Library of Technology · Scranton, International Textbook Co. · leaf 418
re is intended to show onlythe principle of operation and is not supposed to be anexact illustration of the parts of the lamp itself, as some ofthe minor parts have been omitted in order to make thediagram as simple as possible. A and B are the -\- and— terminals in the shape of hooks, so that the… … shown in the figure; R is arocker frame pivoted at xand carrying an iron arma-ture O. This latter has twoholes in it, through whichthe conical pole pieces of themagnet project when thearmature is pulled down.When the lamp is not inoperation, this frame is heldat its highest position bythe…
Electrical engineering
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