Southern Engineer Volume 35

Southern Engineer Volume 35

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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. 1921 edition. Excerpt: was done not by engineers, journeymen steamfitters or contractors, but such men as are generally considered handy with tools in towns pretty well up in the woods. I wrote it up to illustrate how such men play tricks of changing pointers on gages to hold jobs when operating, instead of endeavoring to learn the true and safe procedure. Also the necessity of having a consulting engineer, or firstclass chief engineer on such work instead of apprentice steamfitters or mechanics, who become engineers very quickly in such places, but do not hold such positions long. License laws are needed there. It is not always permissible to mention names of such places as it might reflect on the concern's reputation as well as mark each and all the employes who hired out at such a place, to find themselves where they did not care to be. I walked two miles to see a jet condenser at 1 a. m. one black, dark night. R. A. Cara. Slide Valves. THERE is a slide valve problem that is quite obscure to some engineers. The problem: If you have a slide valve engine cutting off at % stroke, and you wanted to change it to cut off at Vfe stroke, what would you do? What would be the effect on the engine, and how could you get the engine to run all right afterward? We know that with a slide valve having neither lap nor lead there cannot be any cut off, and steam will be taken full stroke. With this positive motion valve we will add outside lap to get % cutoff, and add inside lap so that release and compression will occur at the correct time. This valve must be properly designed for the engine of which it is to become a part. In Fig. 1, with the eccentric at a I he valve is in mid travel or square. This valve, without lap or lead, would cut off at full stroke because more

Product details

  • Paperback | 198 pages
  • 189 x 246 x 11mm | 363g
  • United States
  • English
  • black & white illustrations
  • 1236787986
  • 9781236787989