US Patent: 2,425
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| Machine for mortising timber
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Patentee:
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| Jerub Amber Fay (exact or similar names) - Keene, NH |
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Patent Dates:
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| Granted: |
Jan. 17, 1842 |
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Jeff Joslin
Vintage Machinery entry for J. A. Fay & Co.
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Description: |
| This patent was awarded to the founder of what became the largest woodworking company in the world, J. A. Fay & Co. The design itself is an improvement of George Page's patent 7,484X, and numerous examples survive; Follow the link to the "Vintage Machinery" site to see photos of an example."The first of these improvements consists in the manner in which I have arranged and combined the spring latch by which the chisel shaft is turned round, and is held in place, so as to reverse the chisel..."My second improvement consists in the manner in which I have arranged and combined the respective parts by means of which the shaft A, is moved in and out, in a vertical direction, so as to carry the chisel to the exact point where it is required..."My third improvement consists in the manner in which I form the intermediate lever J, by making it oblique on its lower side, and combine the bridle D, with the upper lever C, and with said middle, or intermediate, lever; by means of which form, arrangement and combination, the power to be applied to the chisel, and its range, are adjusted more readily than in the ordinary modes of combining such bridle..."From the February 1846 Journal of the Franklin Institute, page 115, in a summary of recently issued patents. " This patent "is limited, first, to the peculiar manner in which the chisel shaft swivels on the part which connects it with the lever, by means of a spring catch, jointed to the chisel shaft, which catches into notches in the bridles that suspend the chisel shaft to the working lever. Second, to the combination and arrangement of parts for setting the chisel shaft farther from, or nearer to, the frame, by having the shaft slide in the heads of two parallel bolts, one near the top, and the other near the bottom; these bolts slide freely in the frame and are connected together by means of an iron frame, through which passes a regulating screw, by the turning of which the chisel is set for any thickness of work. And, third, to the arrangement and combination of parts which which the depth of cut can be regulated at pleasure. This is effected in the following manner,—viz. The lever which operates the chisel is at top, and instead of being connected directly with the treadle, there is an intermediate lever, connected with the treadle by a connecting link, or bridle, and this intermediate lever is connected with the upper lever by a bridle which embraces the two lever, and fist in notches in the upper part of one, and the lower part of the other. The lower face of the intermediate lever is inclined, and is provided with several notches, so that by shifting the bridle from notch to notch the depth of cut will be regulated."The above descriptions suggest that this mortising machine design was well refined and reflected experience with using a machine to cut mortises as a working carpenter: in different materials, in different sizes and to different depths. Earlier designs were generally less adaptable; compare this design, for example, to its predecessor, George Page's patent 7,484X. |
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