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US Patent: 24,005
Drill-stock
Patentee:
Merritt S. Brooks - Chester, CT

USPTO Classifications:
74/127

Tool Categories:
woodworking tools : hand drills : spiral drills

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. W. Parmelee
Socrates Denison

Patent Dates:
Granted: May 17, 1859

Patent Pictures:
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Description:
This is the earliest American patent for a spiral drill. The patentee says, "I do not claim, broadly, the invention of a drill stock having its shaft made in the form of a screw". Rather, the innovation is a ratchet mechanism by which "the bit is made to turn in one direction only, viz., its cutting direction, and the bit will not have its edge destroyed as has been hitherto the case, by a reverse movement of the bit."

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