Excerpt from An Efficiency Meter for Electric Incandescent Lamps The problem to be solved consisted in devising some method by which the readings of a wattmeter would be made to vary inversely as the candlepower. Two general methods suggested themselves, a mechanical method and an electrical one. According to the former either the scale of the wattmeter would be moved by the motion of the photometer carriage, or the motion of the latter would vary the counterforce opposed to the moving coil, as, for example, by increasing ...
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Excerpt from An Efficiency Meter for Electric Incandescent Lamps The problem to be solved consisted in devising some method by which the readings of a wattmeter would be made to vary inversely as the candlepower. Two general methods suggested themselves, a mechanical method and an electrical one. According to the former either the scale of the wattmeter would be moved by the motion of the photometer carriage, or the motion of the latter would vary the counterforce opposed to the moving coil, as, for example, by increasing or decreasing the effective length of the spring. Either of these methods would require the wattmeter to be specially constructed, and to be fixed in position relative to the photometer, and would present other serious practical difficulties, so that the mechanical method was abandoned for the more promis ing electrical method. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Add this copy of An Efficiency Meter for Electric Incandescent Lamps to cart. $38.45, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2018 by Forgotten Books.
Add this copy of An Efficiency Meter for Electric Incandescent Lamps to cart. $52.71, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2018 by Forgotten Books.
