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US Patent: 115
Machine for boring and mortising
Portable multi-drill mortiser
John H. Power - Norwalk, OH

USPTO Classifications:
144/70, 408/42

Tool Categories:
woodworking machines : joint making machines : mortising machines
woodworking machines : wood drilling and boring : mortising machines


Not known to have been produced

Joseph B. Tillinghast
Abraham B. Wombaugh, Jr.

Patent Dates:
Granted: Jan. 31, 1837

Patent Pictures:
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"This Machine is principally intended for boreing and mortising holes in posts, for post and rail fence. It consists mainly of three screw augers, placed side by side, in a frame, with pinions on their shanks, so gears that by turning a crank, the three augers will revolve, the middle one the reverse of the other two. To cut the three holes into one, there are four chisels, which advance with the frames, and are so situated that they pare off between the holes."

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