US Patent: 1,150,851
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| Punching-machine
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Patentee:
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| William A. Cornbrooks (exact or similar names) - Moline, IL |
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Patent Dates:
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| Applied: |
Mar. 03, 1915 |
| Granted: |
Aug. 24, 1915 |
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Jeff Joslin
Vintage Machinery entry for Williams, White & Co.
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Description: |
| In making long cylindrical structures out of riveted sheet metal, annular sections are rolled and punched, and because the annular sections are telescoped so that there is overlap at the seams, the hole spacing at end end is very slightly different than at the other end. This punching machine automatically accommodates that difference. |
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