American Machinist Volume 53

American Machinist Volume 53

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...of Great Britain a week or so ago. The plant to be supplied is rolling-mill equipment for the Partington Steel and Iron Co., near Manchester. The German firm, which was asked to tender, submitted fixed prices; this course could not be followed by its British competitors. A turn of comedy has been given to the affair by the announcement that one of the directors of the firm concerned is president of a leading organization for the furtherance of British industries, and that another director is a public man well known for his advocacy of tariff reform (British royalty) protection. A New System Of Measurement Messrs. Brooks and Sears, two officials of the National Physical Laboratory, Teddington, have devised a new system for producing slip gages of the well-known form and, it is claimed, a new system of measurement by which they can plot the contour of the gages to limits of considerably less than 0.000001 in. Stabilization of the steel employed has also received attention; it is something that has been overlooked by certain people, at any rate in Great Britain, who have attempted the production of these gages. The new gages are stated to be actually generated, all sizes-being referred back from a standard foot that is an extremely accurate division of the standard yard. The blocks are not polished but are straight grained on the surface, polishing, as is well-known, producing a hard outer skin which is under stress and therefore tending to change the size and form of the gage. The hardness is 100 Shore. The set comprises 81 pieces, ranging from 0.1001 in. to 4 in. These gages are being made by Pitters Ventilating and Engineering Co., Ltd., London, S. E., and are being distributed by Alfred Herbert, Ltd., Coventry. The High Cost of Metric...show more

Product details

  • Paperback | 838 pages
  • 189 x 246 x 42mm | 1,465g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236787412
  • 9781236787415