Patent No. 11286 William I. Casselman, Vernon Village, Oneida Co., assignor to Elias A. Swan, New York, New York Co., machine for carving marble, stone, &c., 7/11/1854 ~source: New York State Patentees & Assignees, 1850-1854; Ancestry-user contributed transcription by Kathy Crowell online repository https://sites.rootsweb.com/~nyononda/patents/Patents1850-1854.htm

Patent No. 13,343. — Elias A. Swan & De Witt C. Smiley. — Improvements in Machinery for Dressing and Carving Stone. — Patented July 24, 1856

The stone, while it travels with bed B,is operated upon by the twisted cutters on shaft g, which are so arranged that one end of the succeeding cutter shall take the stone before the end of the preceding cutter has left the surface; thereby there is no blow or vibration in the machine, and the cutting is a gradual shearing operation, is a crossslide, which can be adjusted higher or lower, as in planing-machines. In carving out arches, circles, or ellipses for mantels, jointing the corners of beads that come together at an angle by a segment of a circle, and in various other kinds of carved work, the axis of the horizontal cutter should be parallel to and over the radial line from which said curves are described, or else in its rotation a perfect mould or cut could not be produced, in consequence of the change of direction of the cut for this purpose ; we have therefore provided an attachment to the slide-rester (see figures, which are an elevation and plan from below of the same). On the slide-rest the vertical shaft of the pulley 43, which is driven by a belt, is fitted with a pinion 44, which gears to and rotates a wheel 45 on the upper end of a vertical shaft, that is set in bearings
~source: Commissioner of Patents for the Year 1855, by the United States Patent Office; published Washington D.C.

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Note: Elias A. Swan, a civil war soldier, is likely buried in Old Oak Hill cemetery, despite their being a gravestone in Oak Hill. -News articles from the early 1890's into the 1940's frequently listed the names of soldiers whose graves were decorated on Memorial Day. Each time Elias Swan is in the Old Oak Hill cemetery list, but he has a gravestone in Oak Hill. That gravestone is probably a cenotaph. For more information see the notes about Old Oak Hill cemetery.