US Patent: 55,144 - Countersink for Bolts


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US Patent: 55,144

Improvement in Augers
Countersink for Bolts

Patentee:

Henry T. Moody (exact or similar names) - Newburyport, MA

USPTO Classifications:

408/201, 408/214

Tool Categories:

woodworking tools : hand drills : drill bits : countersinks

trade specific : shipwright

Assignees:

None

Manufacturer:

Henry T. Moody - Newburyport, MA

Witnesses:

A. W. Greenleaf

Abbie M. Greenleaf

Patent Dates:
Granted:	May 29, 1866

Patent Pictures:

USPTO (New site tip)
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Report data errors or omissions to steward Jeff Joslin (dm)

Description:

Primarily intended for ship building, the purpose of this auger is to enlarge an existing hole deep enough provide for the head of a bolt and a covering plug. The detachable cylindrical lead-plugs were to be provided in various diameters to accommodate different sizes of bolt-holes.