US Patent: 504,018 - Point for Augers


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US Patent: 504,018

Point for Augers

Patentee:

William Caldwell (exact or similar names) - Coolamon, New South Wales Australia

USPTO Classifications:

408/211

Tool Categories:

woodworking tools : hand drills : drill bits : auger bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

G. G. Turis

E. F. Nicholls

Patent Dates:
Applied:	Jan. 31, 1893
Granted:	Aug. 29, 1893

Patent Pictures:

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Description:

Also patented in New South Wales (December 11, 1890 - No. 2,671) and Great Britain (July 23, 1891- No. 12,810), the primary focus of this patent is the lead screw. The double threads are widely spaced and sharp edged, to help cut through the material while minimizing clogging.