Platers' Guide Volume 8

Platers' Guide Volume 8

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Description

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. 1912 edition. Excerpt: ... no hard and fast rule can be laid down and the quantity of ammonia to be used can be given only approximately. It may be said, however, that from 2 to 4 oz. (liquid) of strong ammonia ran be used to each gallon of brass solution. The brass solution should not smell strongly of ammonia, but be quite perceptible. however, when one is close to the tank. There should be a decided ammonia smell, but no The use of steel balls has now become so extensive in the tumbling of small metal goods in order to burnish them that it is not surprising that attention should have been directed in other lines to ascertain whether the steel balls could not be used for burnishing outside of the tumbling barrel. The result of this attention was the discovery that steel balls could be used for burnishing instead of the ordinary hard burnishing tool and it is_ accomplished b_v holding the balls in a groove so that they are free to revolve. and then revolving the container in an ordinary polishing lathe spindle. balls in the aforesaid manner was first described. The article was an abstract of the patent that was issued to Benjamin F. Dingley of Silver Spring, R. I. The appliance is now being placed on the market in a number of different forms, both for use on a polishing lathe or on a flexible shaft, and in a number of difierent shapes for varying contours of surface. A standard shape is herewith shown and the balls are held loosel_v in the container. The container is then placed on a lathe spindle and rotated. The work is then held against the balls and the surface lubricated with soap water, regularly used in burnishing, and the operation becomes simple. High-lights on an article may be burnished or the whole surface treated. As steel balls are both glass hard...show more

Product details

  • Paperback
  • 189 x 246 x 13mm | 445g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236921941
  • 9781236921949