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Title: |
1891 Article-Egan Co., Square Chisel Mortising Machine |
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Source: |
Industry Magazine, Jun 1891, pg. 184 |
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Insert Date: |
12/9/2012 10:34:53 PM |
The amount of human ingenuity expended on making rectangular holes in wood seems out of all proportion to the dimensions, if not the importance of the object, and like a good many other operations of the kind has been mainly evolved in this country.
Reciprocating chisels in conjunction with boring for hard wood, and without boring for soft wood, is what may be called the regular method, but here and there for a good many years past would be found a hollow chisel machine working successfully, and when they do work successfully the result was a great deal better in every way than by the reciprocating chisel method.
It is more than thirty years since this hollow chisel for '' boring square holes'' was invented by some one in Texas. It had, no doubt, been invented before, and many times since, but this particular case was enough to distinguish the machines as the "Texas Mortising Machines.'' We are writing without references and can not remember the name of the inventor, but it does not matter, because no general use resulted, and ten years later we doubt if there were ten establishments in the country where such machines were in use.
In one of the works in Springfield, Ohio, Warder & Mitchel's we think, this method of mortising was kept up in a most successful manner by machines that in comparison with the one above would be caricatures, but they performed the work and would pass through six inches of seasoned oak, making a true, smooth hole in a most astonishing manner, and later on through the inexorable law of evolution the "art" has been mastered to the extent that good serviceable machines for the purpose are made and sold with as much confidence as tenoning machines or others for finishing operations; not only this, the operation has been applied to iron, and any one in need of a drilling machine to make square holes can be accommodated.
The drawing above has been furnished by the Egan Co., at Cincinnati, Ohio, and represents a machine for cutting mortises in hard or softwood, also for cutting "gains" or notches, especially in railway car and other heavy work when the pieces are long and unwieldy.
The square chisel seen in the center is a square "punch" that cuts away the corners, while an auger, through its center, bores a hole nearly as large as the chisel's flat diameter. The wood cut away by the corners of the chisel is broken into chips by the auger and drawn out with the borings to be discharged at the outer end of the chisel, leaving the wood clear of shavings and all the laying out marks visible. |
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1891 Egan Co., Square Chisel Mortising Machine
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