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US Patent: 108,326
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 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: None Manufacturer: C. C. Bradley & Son, Inc. - Syracuse, NY Witnesses: E. E. Gibson G. L. Chapin	Patent Dates: Granted: Oct. 18, 1870 Reissue Information: Reissued as RE4,470 (Jul. 18, 1871) 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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