US Patent: 1,958,477
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| Filing Machine
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Patentees:
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| Benjamin Grob (exact or similar names) - West Allis, Milwaukee County, WI |
| Theodore Grob (exact or similar names) - West Allis, Milwaukee County, WI |
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Patent Dates:
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| Applied: |
Apr. 03, 1931 |
| Granted: |
May 15, 1934 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Grob, Inc.
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Description: |
| Abstract:
The present invention relates generally to Improvements in the art of mechanical abrasion and relates more specifically to improvements in the construction and mode of operation of filing machines or the like.
Claim:
In combination, a series of links having overlapping ends provided with sets of transverse b openings of like diameter, a pivot pin disposed in each set of said openings, each of said pins having an enlarged medial portion snugly fitting one opening of a set and having a reduced end portion loosely fitting another opening of the same set, and spring means for spreading said links to compensate for said loose fit and to maintain the series in stretched condition. |
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