US Patent: 321,196 - Drilling-Machine


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US Patent: 321,196

Drilling-Machine

Patentees:

Henry E. Eberhardt (exact or similar names) - Newark, NJ

Ulrich Eberhardt (exact or similar names) - Newark, NJ

USPTO Classifications:

173/146, 279/103, 408/126, 408/133, 408/135, 74/333, 74/423

Tool Categories:

metalworking machines : drilling and boring : drill presses

woodworking machines : wood drilling and boring : drill presses

Assignees:

None

Manufacturer:

Gould & Eberhardt - Newark, NJ

Witnesses:

Henry J. Theberath

Thomas S. Crane

Patent Dates:
Applied:	Feb. 11, 1885
Granted:	Jun. 30, 1885

Patent Pictures:

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Vintage Machinery entry for Gould & Eberhardt

Description:

Crane & Miller - patent attorneys

This design is shown in an 1892 ad from Gould & Eberhardt of Newark, successors to E. Gould & Co.

This invention relates to an improvement in column power drilling-machines; and it consists, first, in a special means for unclutching the spindle-driving cone from its shaft, so as to operate with back gearing; secondly, in means whereby the back gearing may be thrown into operation and the spindle-cone be unclutched by a lever extended within reach of the operator, and preferably by a single movement of the same; thirdly, in an improved construction for the drill-feeding device; fourthly, in a stationary bar marked with drill-sizes and applied to the belt-driving cone to indicate the proper speed for the belt; fifthly, in a corresponding index applied to the drill-feeding mechanism to indicate the proper feed of a drill of given size; sixthly, in an improved means for locking the drill-shank in the spindle and for driving it out of the same: and, seventhly, in an improved construction for the sliding sleeve and toothed rack which sustain and feed the drill-spindle.