US Patent: 1,814,963 - Drill Arm for Metal Drilling Machinery


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US Patent: 1,814,963

Drill Arm for Metal Drilling Machinery

Patentees:

Albert E. Robinson (exact or similar names) - Cincinnati, Hamilton County, OH

William L. Schellenbach (exact or similar names) - Wyoming, Hamilton County, OH

USPTO Classifications:

408/241R, 408/88

Tool Categories:

metalworking machines : drilling and boring : drill presses : radial drill presses

Assignees:

American Tool Works Co. - Cincinnati, Hamilton County, OH

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 20, 1928
Granted:	Jul. 14, 1931

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for American Tool Works Co.

Description:

Claim:

A radial drill-arm for a radial metal drilling machine, said drill-arm comprising a cast body of metal having an upright bearing portion arranged to be received about the upright column of the drilling machine and a laterally extending overhanging arm portion, a tension member extending obliquely in said arm-portion of said cast body throughout the greater portion of the length of said arm-portion, and means whereby said tension member is anchored obliquely in a single direction at its respective ends to said cast body, and said cast body between said anchoring means being under compression and said tension member being under tension to resist deflection in said drill-arm.