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US Patent: 1,670,648
Automatic punching press
Patentee:
Otto S. Beyer (exact or similar names) - Brooklyn, NY

USPTO Classifications:
192/138, 192/25, 79/5, 83/274, 83/69

Tool Categories:
metalworking machines : metalworking presses : punch presses

Assignees:
E. W. Bliss Co. - Brooklyn, NY

Manufacturer:
E. W. Bliss Co. - Brooklyn, NY

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 19, 1925
Granted: May 22, 1928

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for E. W. Bliss Co.
Description:
This improvement to punch presses is particularly intended for presses that punch out circular holes or slots for forming motor rotor or stator cores. Typically, a single pair of dies punches one hole or slot at a time, and the press is cycled several times with automatic feed to produce a completed work-piece. This improvement allows the press to cycle very quickly, which is achieved by gearing up a clutch-controlled shaft to drive the punch, with corresponding improvements to the feeder. In general, reciprocating movements are replaced with rotary movements, the only exception being the punch-head itself.

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