US Patent: 841,758 - Drill-chuck


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US Patent: 841,758

Drill-chuck

Patentee:

Walter H. Adams (exact or similar names) - Sound Beach, CT

USPTO Classifications:

279/36

Tool Categories:

woodworking tools : hand drills : drill chucks

Assignees:

None

Manufacturer:

Walter H. Adams - Sound Beach, CT

Witnesses:

F. W. Smith, Jr.

M. T. Longden

Patent Dates:
Applied:	Aug. 06, 1906
Granted:	Jan. 22, 1907

Patent Pictures:

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Description:

"The object of my improvement is to insure a biting contact throughout the length of the jaw-heads whether the drill-shank be straight or tapered, while at the same time the jaws themselves shall be under a spring tension at all times."

A reported example is labeled "Walter H. Adams M'F'R/ Sound Beach, CT". The rim of the gear wheel is marked, "Sound Beach, CT", "Patent Applied For" and the number "489."