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507 Mechanical Movements Mechanisms and Devices by Henry T. Brown
THE need of a complete assortment of illustrations and descriptions of MECHANICAL MOVEMENTS has lengthy been severely felt by artisans, inventors, and college students of the mechanic arts. It was the information of this need which induced the compilation of the gathering right here offered. The actions which it comprises have been already illustrated and described in occasional installments scattered by way of 5 volumes of the AMERICAN ARTISAN, by the readers of which their publication was obtained with a lot favor as was believed to warrant the expense of their replica with some revision in a separate quantity.
The number of the actions embraced on this assortment has been constituted of many and varied sources. The English works of Johnson, Willcock, Wylson, and Denison have been drawn upon to a substantial extent, and many different works—American and international—have been laid beneath contribution ; however greater than one-fourth of the actions—lots of purely American origin— have by no means beforehand appeared in any printed assortment.
Though the gathering embraces about 3 times as many actions as have ever been contained in any earlier American publication, and a significantly bigger quantity than has ever been contained in any international one, it has not been the thing of the compiler to merely swell the quantity, however he has endeavored to pick out solely akin to could also be of actually sensible worth ; and with this finish in view, he has rejected many that are present in almost all of the beforehand printed collections, however which he has thought-about solely relevant to some distinctive need.
Owing to the number of these actions at such intervals as might be snatched from skilled duties, which admitted of no postponement, and to the engravings having been made sometimes for instant publication, the classification of the actions just isn’t as excellent because the compiler may have desired; but it’s believed that this deficiency is greater than compensated for by the copiousness of the Index and the totally novel association of the illustrations and the descriptive letter-press on reverse pages, which make the gathering—massive and complete as it’s—extra handy for reference than any earlier one.
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