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Title: |
1872 Article-A. S. & J. Gear & Co., Dovetailing Machine |
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Source: |
The Industrial Monthly, V1, Apr 1872, pgs.98-99 |
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Insert Date: |
3/25/2017 5:10:29 PM |
Automatic Dovetailing Machine
There are a number of machines which, strictly speaking, are not dovetailing-machines. Some of them make a joint by boring a hole in one piece and forming a pin on the other; but these are dowelling-machines. The pieces, then, are dowelled, and not dovetailed together. Sometimes the pins are made so as to leave a shoulder; but the durability of the joint is in the strength of the pin only. The machine represented on the opposite page, however, forms a dovetail, the tenons of which bear on every part of the mortise, and makes. perfect fit. On reference to the engraving will be seen a vertical spindle, in which is seen also the dovetailing-head (b), so arranged as to be moved up or down in order to adjust the same to any height. On the frame back of it are two sliding tables, which are simultaneously moved by a simple mechanism, feeding the pieces to be dovetailed (which are held on one of them) by the cutter-head, forming one into a tenon, and the other into a mortise.
The belts from the large pulley on the counter shaft give power to the shaft containing the cutter-head, and the pulleys seen underneath the machine are driven by a belt from the counter-shaft, which gives motion to the sliding tables, and feeds the work being cut back and forth past the revolving cutter-head. The engraving c shows the manner in which the pieces come together while being cut; and the engraving d represents the appearance of the finished dovetail. The manner of holding the cutters in the cutter-head used (see engraving b) is quite simple, and but a very short time is required to take them out, sharpen and replace them. It is claimed that wood put together by this machine is more firm and durable than by other former devices, and that the operation, as performed by this machine, becomes more economical than nailing. It is not only adapted for the manufacturing of drawer and other work, but boxes may be made by it with accuracy and strength.
US Patent: 125,282
http://datamp.org/patents/displayPatent.php?number=125282&typeCode=0 |
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1872 A. S. & J. Gear & Co., Dovetailing Machine
1872 A. S. & J. Gear & Co., Dovetailing Machine (Cutter & Dovetail Examples)
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