US Patent: 156,276
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| Improvement in power-hammers
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Patentee:
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| John C. Butterfield (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 25, 1874 |
| Granted: |
Oct. 27, 1874 |
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Jeff Joslin
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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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