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US Patent: 245X
Machine for making ivory combs
Phineas Pratt - Essex, CT

USPTO Classifications:

Tool Categories:
woodworking machines : specialty machines : comb making machines


Not known to have been produced


Patent Dates:
Granted: Apr. 12, 1799

Patent Pictures:
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This patent's specification and drawings were lost in the Patent Office fire of December 1836, and so little is known about this patent.

See also the slightly earlier patent X200, especially the description and the link to a court case.

The 2009 book "Ivory's Ghosts", by John Walker, describes this patent comb-making machine. "An ingenious combination of flywheels and fan belts, thin circular saws and adjustable precision clamps on a wooden stand, it greatly shortened the time required to cut the teeth of combs, thereby mechanizing the manufacture of perhaps the single most popular ivory object in history. A fundamental shift in ivory's importance had occurred...Pratt's invention initiated the transformation of world trade in ivory."

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