US Patent: 738,826
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| Self-adjusting plunger
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Patentee:
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| Charles F. Marsh (exact or similar names) - Elgin, IL |
| USPTO Classifications: |
| 81/6 |
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Patent Dates:
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| Applied: |
May 04, 1903 |
| Granted: |
Sep. 15, 1903 |
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Patent Pictures:
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Steve Gosselin
"Vintage Machinery" entry for Hardinge Bros.
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Description: |
| This device is used to hold a watch movement while pressing the hands into position on the center staff. The staff is supported so that pressure is not placed on the jewel bearing while the hands are being pressed on. An example has been reported, labeled on the outside "HARDINGE BROS. MFGRS. CHICAGO U.S.A." The inside is labeled "PAT. SEP 15 '03. / CHAS. MARSH ELGIN, ILL." |
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