Popular science monthly . A Pull on the String Supporting LighterWeight Opens the Plug The Use of Jigs and Fixtures Bv S. H. Samuels THE average person conceives oftools as drills, taps, reamers,etc., but modern automatic ma-chinery has necessitated the use of jigsand fixtures for reproduction work. In jigs and fixtures would be unpracticaland extravagant. When large quantitiesare to be produced and sent upon themarket, however, the results are sur-prising. The cost is reduced from 50. Fig. 3 shop talk, they also come under thelisting of tools. Jigs and fixtures are mechanical con-trivances, s
Popular science monthly . A Pull on the String Supporting LighterWeight Opens the Plug The Use of Jigs and Fixtures Bv S. H. Samuels THE average person conceives oftools as drills, taps, reamers,etc., but modern automatic ma-chinery has necessitated the use of jigsand fixtures for reproduction work. In jigs and fixtures would be unpracticaland extravagant. When large quantitiesare to be produced and sent upon themarket, however, the results are sur-prising. The cost is reduced from 50. Fig. 3 shop talk, they also come under thelisting of tools. Jigs and fixtures are mechanical con-trivances, such that any mechanical orelectrical machine part may be placedand held rigidly, during the process ofmachining. Opinions vary on the exactdistinction to be made between the jigand fixture. Appliances designed for use on a drillpress are called jigs, while those designedfor use on other machine tools such asmillers, planers, etc., are correctly calledfixtures. Jigs may be employed fur drilling,reaming, centering, tapping, etc., iiUthese operations being done on the drill-press type of machine. The fixture isused in milling, turning, broaching,boring, tiuicking, planing, proliiing,cam-cutting, gear-cutting, and manyother operations in nuuiiine sh<)i)s. Jigs and fixtures have two distinctadvantages—cheapness and interchange-ability of parts. When a small numberof machines arc to l)e built, the use of Fig. 6 to 75 per cent, due to less tooling upthan would be necessan,- with
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
