US Patent: 1,864,707 - Slip bushing


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US Patent: 1,864,707

Slip bushing

Patentee:

Carroll R. Alden (exact or similar names) - Detroit, MI

USPTO Classifications:

384/296, 408/241R

Tool Categories:

metalworking machines : drilling and boring : drill presses : drill press accessories

Assignees:

Ex-Cell-O Aircraft & Tool Corp. - Detroit, MI

Manufacturer:

Ex-Cell-O Corp. - Detroit, MI

Witnesses:

Unknown

Patent Dates:
Applied:	Jul. 12, 1929
Granted:	Jun. 28, 1932

Patent Pictures:

USPTO (New site tip)
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Ex-Cell-O Machine Tools, Inc.

Description:

Ex-Cell-O claimed to have created the concept of the standardized drill bushing; they dominated that market from the mid-1920s and for some years afterwards. This patent covers a bushing design "without recesses wherein dirt and chips may gather". In addition, the bushing may be turned in either direction to lock the two pieces together.