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Title: |
1872 Article-Trump Brothers, Jig Saw |
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Source: |
Scientific American, V 27 #26, 28 Dec 1872, pg. 407 |
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Insert Date: |
3/13/2013 4:36:55 PM |
AMATEUR'S JIG SAW
We illustrate herewith an ingenious form of jig saw, designed especially for amateur use. It is portable and readily attached to a carpenter's bench or an ordinary table, by means of the screw clamp, as shown. The cast iron arm terminates in the guide, D, in which works the spindle to which the upper end of the saw is attached in the ordinary adjustable manner, its lower extremity being similarly held in the guide underneath the table. A constant tension of the blade is maintained by the bent springs, E and F. Motive power is communicated from the treadle, which may be attached, at any convenient point on the floor, to a rod which forms a sleeve for a smaller rod, which is connected with the crank of the large wheel, A. The object of making the rod in two portions is that it may be adjusted to suit any height of table and afterward held in position by the set screw at H.
Around the circumference of the wheel, A, is placed a covering of leather, by the friction of which the pulley, B, and the fly wheel connected therewith are actuated. By means of the pitman, as shown, motion is transmitted to the saw. G is an adjustable metal foot designed for holding the work in place while being operated upon.
The machine is both simple and durable in construction, and, as a means of developing a mechanical taste in the young, will prove both a useful and instructive gift. It will readily cut out brackets, book racks, and other ornamental articles, and thus may be used for profit as well as for amusement.
Patented through the Scientific American Patent Agency, July 23, 1872. For sale of rights, agencies, and for other particulars, address the inventor, Mr. Samuel N. Trump, or Mr. C. N. Trump, machinist, Port Chester, N. Y.
Patent #129,874 |
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1872 Trump Brothers, Jig Saw
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