Our Factories, Workshops, and Warehouses; Their Sanitary and Fire-Resisting Arrangements

Our Factories, Workshops, and Warehouses; Their Sanitary and Fire-Resisting Arrangements

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 edition. Excerpt: ...is prevented. It lifts higher from its seat than any other form of valve, and discharges as much as five valves of the ordinary construction, and when it discharges the great rise of the valve produces a considerable noise, hence its name, pop valve. The valve may be moved whilst actually under pressure to test its condition. Fig. 98. It can he locked up and therefore cannot be tampered with. There are no levers, pins, or joints, to interfere with its free action. Fig. 99 represents a government pattern safety valve as arranged by Messrs. Bailey and Ashcroft. It consists of one lever safety valve, one spring safety valve, locked-up test lever, and rotary spindles for testing; the spring and seats nickel plated. Pressure Gauges out of Order. Neglect in blowing out, testing, and cleaning the gauges soon destroys their efficiency. The sulphurous emanations from the stoke-hole (unless they are well ventilated) soon corrode the working parts of the dial, and the tube eventually becomes choked. The working parts should constantly be kept clean. Bourdon's gauge as improved by Bailey is one of the most perfect forms of gauges. The case is solid gun-metal, and the syphon of registered pattern, by which a test gauge may be attached and the accuracy of the gauge determined; a danger hand is fixed to the dial to plainly define the maximum limit of pressure. The danger hand can be locked to its position by the masters, so as to refute any false evidence which might be given by the stoker or other person in charge of the boiler, in case of accident and Government inquiry. Blancke's steel plate gauge, with the dial protected by a wire guard, is also an admirable contrivance. Water Gauges out of Order or Fixed too Low. The fixing of the water gauges too low is a...show more

Product details

  • Paperback | 70 pages
  • 189 x 246 x 4mm | 141g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123648620X
  • 9781236486202