US Patent: 857,151 - Drill-bit holder


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US Patent: 857,151

Drill-bit holder

Patentee:

Ulysses Silas Booth (exact or similar names) - Portland, OR

USPTO Classifications:

279/83, 408/239A

Tool Categories:

metalworking machines : drilling and boring : drill presses

woodworking machines : wood drilling and boring : drill presses

Assignees:

Champion Blower & Forge Co. - Lancaster, PA

Manufacturer:

Champion Blower & Forge Co. - Lancaster, PA

Witnesses:

E. L. Johnston

J. E. Magers

Patent Dates:
Applied:	Feb. 26, 1907
Granted:	Jun. 18, 1907

Patent Pictures:

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Vintage Machinery entry for Champion Blower & Forge Co.

Description:

Seen on a Champion model "BB" post drill. Also seen in a 1926 catalog from Champion Blower & Forge Co., labeled as "The Champion Never Slip Drill Chuck". The patent date is clearly visible in the illustration of the chuck. "The Champion 'Patented' Never Slip Drill Chuck is made of one piece, and is positively interlocking without a loose part to it. The interlocking feature of the Champion 'Patented' Chuck is a square shoulder, worked out of the solid metal, in which the flat side of the drill bit shank fits; thus locking the bit from turning in chuck. The Set Screw is countersunk, leaving no protrusion; meeting safety laws in all conditions."