American Blacksmith and Motor Shop Volume 14 (Paperback)

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. 1914 Excerpt: ...time He got a contract to cut some heavy sprues from several heavy cast iron pieces and, of course, came away a disappointed man. He came to us for advice and we asked him where he got his idea that, he could cut cast iron and he showed us an article which said that the oxy-acetylene torch is very valuable for cutting sprues from castings. There is no doubt that such articles have been the means of a great many sales of welding and cutting outfits, and while they lead to considerable disappointment in the beginning, it is a good thing in the end. For after one iiiiiMiiMiiiiiitmiiiiMiiimihiiiiMtiiiimimmiiiiiiiiiiiiiiiiHiiMiHiiiiiiiiMiiii; To light the torch properly, proceed as follows: First turn on a little acetylene and light it, then turn on more acetylene until the flame leaves the tip and still keeps burning, this willl be %-inch from the tip. Next turn off the acetylene very slowly until the flame comes back to the tip, and turn on the oxygen. Keep turning it on slowly until you get a small, white cone like A in the engraving. This is what we call the first heat, and if it is not strong enough, turn on more acetylene until the small, white cone lengthens out to look like B. You heat enough, do the same thing again, and every time this is done the heat is increased almost double in quantity. You can do this about three times with each tip and it will be noticed that each time this is repeated the small white cube gets a little longer. When you get to the limit Od each tip the flame will blow out on touching the work, so you have to turn off both gases quickly and start over again with the above process. You will soon get so that you can do this very quickly, but we would advise going very slowly until you feel more confidence in yourself, which you wi...