US Patent: 1,328,429 - Arm-binder and elevating-control-shaft lock


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US Patent: 1,328,429

Arm-binder and elevating-control-shaft lock

Patentee:

James Clyde Haldeman (exact or similar names) - Salem, OH

USPTO Classifications:

408/234

Tool Categories:

metalworking machines : drilling and boring : drill presses

woodworking machines : wood drilling and boring : drill presses

Assignees:

Silver Mfg. Co. - Salem, OH

Manufacturer:

Silver Mfg. Co. - Salem, OH

Witnesses:

Unknown

Patent Dates:
Applied:	May 02, 1919
Granted:	Jan. 20, 1920

Patent Pictures:

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Vintage Machinery entry for Silver Mfg. Co.

Description:

"The invention relates to drilling machines in which an arm for supporting the drill head is carried upon a vertical column and power means is provided for raising and lowering the arm and has more especial reference to means for clamping the arm in adjusted positions upon the column and at the same time locking the raiding and lowering means."