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US Patent: 156,276
Improvement in power-hammers
Patentee:
John C. Butterfield (exact or similar names) - Chicago, IL

USPTO Classifications:
173/126, 248/176.1, 72/431

Tool Categories:
metalworking machines : forging machines : drop hammers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
N. B. Smith
R. D. O. Smith

Patent Dates:
Applied: Aug. 25, 1874
Granted: Oct. 27, 1874

Patent Pictures:
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Description:
"This invention relates to that class of hammers known as upright or dead-stroke hammers; and it consists in a novel mode of applying elastic buffers to the ram or hammer-piston to absorb the concussion from the hammer-stroke, and make the blow elastic."

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