US Patent: 1,306,106 - Drill-steel-pinning device


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US Patent: 1,306,106

Drill-steel-pinning device

Patentee:

Jesse Ditson (exact or similar names) - Littleton, CO

USPTO Classifications:

76/5.6

Tool Categories:

work holding : vises : vise mechanisms

Assignees:

J. George Leyner Engineering Works Co. - Littleton, CO

Manufacturer:

Ingersoll-Rand Co. - New York, NY

Witnesses:

Unknown

Patent Dates:
Applied:	Jun. 30, 1917
Granted:	Jun. 10, 1919

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Ingersoll-Rand Co.

Description:

The invention is a machine to sharpen a rock drill containing a longitudinal hole for the conveying of air and water to the cutting edge to carry away the swarf. During sharpening the hole tends to become blocked, and this invention forces a pin through the hole to clear it. See also patent 1,349,330, which gives a further improvement to this invention.