US Patent: 4,387
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| Mortising-machine
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Patentee:
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| Benjamin H. Otis (exact or similar names) - Dedham, MA |
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Patent Dates:
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| Granted: |
Feb. 20, 1846 |
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Patent Pictures:
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Jeff Joslin
Vintage Machinery entry for B. H. Otis
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Description: |
| From the 17 October 1846 issue of Scientific American: "OTIS'S PATENT MORTISING MACHINE. Among the great variety of excellent machines which attract the attention of the visitors of the Fair, there are few if any in which so much science, utility and good workmanship are combined, as in the mortising machine, invented by Mr. B. H. Otis of Syracuse. We shall procure an engraving of this machine, and give a full description in two or three weeks. The agent of the patent is Mr. John Green, 115 Water street." The October 31 issue published a front page article, complete with engraving, of the mortiser.The 30 October 1852 issue of Scientific American mentioned that Otis' Mortising Machine was displayed at the Fair of the American Institute.The 6 November 1852 issue of Scientific American carried this writeup. "MORTISING AND BORING MACHINE—B. H. Otis, Binghamton, N. Y.—The above is a machine adapted for all the slotting and drilling operations required in wood-work; the necessary apparatus for boring is quite distinct from that for mortising so that although there are two spindles, &c., the machine is much more simple that would be possible otherwise, and requires no further adjustment for boring after having been used for the other operation. The frame resembles the usual form of a machinist's drilling machine, having two uprights, which, however, are of hard wood. In front are two iron spindles, which slide up and down in guides, and which have each a socket—one for a chisel and the other for an auger or other boring tool. The table on which the plank rests can be raised or lowered as it slides in a longitudinal groove cut in the framing. The spindles are held up by chains connected to strong springs, one for each spindle, which are at the top of the frame. To perform the operation of slotting, the work-man having adjusted the work, by fixing the table and bringing the spindle over the part to be cut, presses his foot on a lever, which causes an iron frame, working on pivots and connected by a rod to the spindle, to be drawn forward. It is thus thrown into contact with a crank motion, which, in each of its revolutions, depresses the frame and consequently the spindle and chisel. As the crank, in its revolution, passes on and ceases its action on the frame, the spring at the top draws the spindle up, and thus a rapid succession of alternating longitudinal movements is maintained. We should mention that the depth of the mortise is regulated by the pressure of the foot. For boring it is only necessary to throw the belt on the fast pulley, when a rotating motion is given to the spindle."The 2 April 1853 issue of Scientific American carries yet another article and engraving, this time for Otis' Mortising, Boring, and Hub-Mortising Machine. The maker was Otis & Cottle of Syracuse.The 29 October 1853 issue of Scientific American noted that Otis & Cottle were exhibiting a mortising and boring machine, "improved somewhat from the one illustrated in No. 29 of our last volume." The referenced article is the one from 2 April 1853. |
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