Practical shop work; a concise explanation of modern shop methods and tools for the machinist, tool maker, smith, sheet metal worker, pattern maker and machinery draftsman Volume 1 - Softcover
Synopsis
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. 1906 edition. Excerpt: ...should be kept in racks constructed on the same principles as those just described, but suspended from the overhead timbers, leaving a clear space of six and a half feet beneath. The vertical divisions between the boards for supporting them on edge may be of wood, and should be much closer together than the dimensions given for the dry room, so that only one board may be placed in a space. The reason for this is that when a board is wanted several others need not be disturbed. Lumber should be planed to definite thickness before being placed in these racks. For instance, thicknesses increasing by sixteenths of an inch from one-quarter to one inch, by eighths from one inch to two inches, and by quarters from two inches to four inches. This lumber should be planed slightly thicker than the figures given, so that it may be smoothed up to the exact dimensions. Even if lumber has been dried out in the dry room it will be advantageous, as well as convenient, to keep it in the pattern shop as here described. If lumber must be piled up horizontally, with the flat sides together, the boards or planks should be separated by strips one-half to one inch thick placed between them, and not over six feet apart for lumber of less than one inch thick. For thicker lumber the distance may be somewhat increased. These separating strips should be placed directly over each other, so that the boards may not be bent or distorted by downward pressure at unsupported points. In the successful use of wood in making patterns it is essential to know its tendencies under varying conditions. There is a certain amount of moisture in all woods, even though it may have been kept in a dry place for a year or two. It is not unusual for this moisture to exceed fifteen per...
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