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US Patent: RE4,470
Improvement in trip-hammers
Patentees: James Hay (exact or similar names) - Chicago, IL John C. Butterfield (exact or similar names) - Chicago, IL USPTO Classifications: 72/431, 72/466.9 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: None Manufacturer: C. C. Bradley & Son, Inc. - Syracuse, NY Witnesses: N. N. Fiske George G. Hunt	Patent Dates: Granted: Jul. 18, 1871 Reissue Information: Reissue of 108,326 (Oct. 18, 1870) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for C. C. Bradley & Son, Inc.
Description: This trip-hammer uses a rubber spring.

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