Asme Transactions Volume 1-25; V. 27

Asme Transactions Volume 1-25; V. 27

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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. 1906 edition. Excerpt: make the connection incorrectly, as is usually done when there is nothing to guard against it. 24. The low cost of the couples makes it practicable for the user of the instrument to keep an extra fire end in reserve, which may, at any time, be quickly substituted for the one that has been in continual service, thus affording an economical and positive check upon the accuracy of the instrument.' 25. The elements of the couple are independently insulated in a novel and effective manner by winding each with asbestos cord and then coating the surface with carborundum paint, a solution of silicate of soda being used as a binder. This makes a clean, com 26. Couples thus insulated are flexible, and can either be applied to the heated space directly or they may be inserted into a piece of ordinary pipe as a protection. This protection has proven itself to be effective and economical. 27. For continuous applications of the couples to temperatures in the neighborhood of 2,000 degrees Fahr. or over, special protecting tubes of nickel, plumbago or porcelain are employed. 28. These pyrometers are furnished with scales for total ranges of 600, 1,200, 2,000 and 2,600 degrees Fahr. Reproductions of these scales 'are shown in Figs. 5, 6, 7 and S. 29. The graduations of these scales are determined by the fusing temperatures of lead, zinc, aluminum and copper, which give sufficient points on the curves for use in making a complete graduation of the scales. The divisions are also further checked by the use of a standardized Le Chatelier Platinum-Rhodium Couple, and a SiemanHalske Suspension Galvanometer. 2 For very open scales over shorter ranges several couples may be placed in series, thus making it possible to read to small fractions of more

Product details

  • Paperback | 278 pages
  • 189 x 246 x 15mm | 499g
  • United States
  • English
  • black & white illustrations
  • 1236776410
  • 9781236776419