Practical Dental Metallurgy

Practical Dental Metallurgy

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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. 1881 edition. Excerpt: ...gems, and other purposes where an ordinary furnace is useless or unreliable. THISAJRJ FURNACE IS/H BEYOND COMPARISON, THE " F..BEST AND SIMPLEST GAS FURNACE MADE. See tests made at the Exhibition of the Glasgow Philosophical Society, October 22nd, 1880. It has been found that, in working at extremely high temperatures, the ring which holds the gauze is liable to be fused. To prevent this a new burner has been designed, in which the ring is entirely dispensed with, and the gauze cap is pushed up from the back of the burner against a small shoulder inside the nozzle of the burner. The burner is in one casting, and, therefore, there is no tendency for the nozzle to get hot, as in the former pattern. See that the gauze is pushed up from behind to within about J inch of the nozzle. Power And Speed Of Working.--These are practically without limit, depending only on the gas and air supply, and are under perfect control. With in. gas pipe and the smallest foot blower, the small furnace will melt a crucible full of cast-iron scrap in 7 minutes; and steel in 12 minutes, starting with all cold. INSTRUCTIONS. Gas supply required, 6 oz. size furnace, f in. pipe= 7 to 20 ft. of gasl? hour. -, 2 lb. size, g in. pipe=io to 40 ft., i n - 6 lb. size, J in. pipe=25 to 60 ft. - -, 12 lb. size in. pipe=30 to 70 ft. I., 28 lb. size ij in. pipe=7o to 200 ft., See that all gas taps have a large clear way through. High temperatures and rapid working require a free supply of gas. To adjust a new furnace to its highest power: --Put the nozzle of the burner tight up against the hole in the side of the casing, turn on the full gas supply, light the gas in the furnace, and connect the blower, more

Product details

  • Paperback | 32 pages
  • 189 x 246 x 2mm | 77g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236598083
  • 9781236598080