Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 96
Fig. 21. with which work is fixed. By thisarrangement the jaws canbe moved quickly either out or in, by pressing a small springlever, and the ordinary screw arrangement commenced at any … Fig. 22. point to give extra pressure. The Parkinson PerfectVice is an excellent example of this type, and is illustratedat Fig. 22. 80 METAL-WORK Fig. 23 shows the nut and part of the screw in section, thenut being withdrawn or disengaged from the buttress-shapedscrew. This is done by means of the…
Metal-work
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