US Patent: 164,999 - Twist Drill for Wood


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US Patent: 164,999

Improvement in Bits for Boring Wood
Twist Drill for Wood

Patentee:

Gardner L. Holt (exact or similar names) - Springfield, MA

USPTO Classifications:

279/99, 408/223, 408/230, 408/233

Tool Categories:

woodworking tools : hand drills : drill bits : twist drill bits

Assignees:

None

Manufacturer:

M. W. Robinson Company - Brooklyn, NY

G. L. Holt - Springfield, MA

Witnesses:

T. C. Curtis

C. E. Buckland

Patent Dates:
Applied:	Jul. 30, 1874
Granted:	Jun. 29, 1875

Patent Pictures:

USPTO (New site tip)
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Report data errors or omissions to steward Jeff Joslin (dm)
1884 catalog of J. W. Manneer (see p. 14)

Description:

Holt cites a combination of a "reamer point," sharp edged spiral grooves and slightly enlarged diameter threaded portion of the shaft where it enters the head as the basis for this patent.

The 1884 catalog of post-drill maker J. W. Manneer features "Holt's Patent Gimlet Bits" on page 14. The illustration shows the maker's name of G. L. Holt, as well as the patent date.