US Patent: 1,724,430 - Drilling Machinery


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US Patent: 1,724,430

Drilling Machinery

Patentees:

Augustus M. Sosa (exact or similar names) - Cincinnati, Hamilton County, OH

William G. Hoelscher (exact or similar names) - Norwood, Hamilton County, OH

USPTO Classifications:

408/128, 408/131, 408/234

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:	Jun. 13, 1927
Granted:	Aug. 13, 1929

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:

Our invention relates to drilling machinery, especially to the type known as sensitive drills, in which high speeds of rotation of the tool-spindle are employed.

It is the object of our invention to provide new and improved means for causing rotation of the tool-spindle; further to provide new and improved means for rotating the tool-spindle at high speeds without jar and at uniform rate at the tool-spindle; further, to provide novel means whereby reversals of rotation of the tool-spindle are instantly obtained; and, further, to provide novel means for quick cessation of rotation of the tool-spindle.