Mechanical and Electrical Inventions; Comprising Machinery, Mechanisms, Movements, Indicating, Recording and Integrating Instruments and Apparatus for Laboratory Research and Industrial Applications Volume 1

Mechanical and Electrical Inventions; Comprising Machinery, Mechanisms, Movements, Indicating, Recording and Integrating Instruments and Apparatus for Laboratory Research and Industrial Applications Volume 1

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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. 1900 edition. Excerpt: ...in New York which the logarithms of the volts and the amperes in the Ianuary!8s? i 1i i 11i ii i Subject No. 6. circuit to be measured nave been added, and the product so obtained after having been suitably transformed into a scale of equal units, has been recorded upon a registering train. In the adding mechanism, as applied in that case, the sum of the logarithms is obtained by mechanically multiplying half the sum, or the square root of the watts, by two, before its transformation. In the meter, as here designed, the square root of the watts is recorded, it being only necessary to employ in the said recording of the same, a scale which is equivalent to one-half of that employed in the basic cams on the volt and ammeters, together with a slight modification in the gearing. Although the principle and the method of allowing the adding system to take up its position with respect to the logarithmic cams before recording, remain much the same, the mechanical agency and construction are different. Referring to the drawings, Fig. i is a plan of the meter, with the volt and ampere logarithmic cams indicating the same value, Fig. 2 a plan partly in section, with the cams at different values, Fig. 3 a side elevation partly in section, and Fig. 4 an end view giving the details of the oscillating motor. Taking up the construction, the supporting portion is seen to consist of a cast back plate /, to which are bolted two main plates marked 2, held rigidly a constant distance apart by vertical sleeves and machine bolts. Forming a part of these sleeves nearest the back plate, are two cast bridge portions which extend outwardly to support the permanent field magnets 3 and 4 of the volt and ammeters. Long bolts also hold these together. On the under side...show more

Product details

  • Paperback | 90 pages
  • 189 x 246 x 5mm | 177g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236879902
  • 9781236879905