US Patent: 1,531,489
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| Pneumatic drop hammer
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Patentees:
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| George P. Macready (exact or similar names) - Providence, RI |
| James R. Bowie (exact or similar names) - Providence, RI |
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Patent Dates:
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| Applied: |
Aug. 13, 1921 |
| Granted: |
Mar. 31, 1925 |
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Jeff Joslin
Vintage Machinery entry for Franklin Machine Co.
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Description: |
| "This invention relates... more particularly to such drop hammers used in precision work like jewelers' work and the like. Broadly stated, it is an object of the present invention to provide an improved form of drop hammer, in which rebound of the ram shall be effectively prevented, so that accurate precision work may be reliably produced." |
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