US Patent: RE9,734
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| Lathe-chuck
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Patentee:
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| William L. Sweetland (exact or similar names) - Windsor Locks, CT |
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Patent Dates:
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| Applied: |
Apr. 25, 1881 |
| Granted: |
May 31, 1881 |
| Reissue Information: |
| Reissue of 211,943 (Feb. 04, 1879) |
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Jeff Joslin
Vintage Machinery entry for Hoggson & Pettis Mfg. Co.
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Description: |
| This chuck is a 'universal' chuck where the jaws can be moved either together or independently. The description of patent 346,133 describes this patent: "...the jaws are capable of being disconnected from the motive gear by which their universal movement is effected, whereupon each jaw may be propelled outward or inward by its own screw. When it is desired the render the chuck universal again, all the jaws must be set to positions equally distant from the center, whereon they are reconnected to the motive gear. The motive gear in this kind of chuck is most commonly an annular rack engaging pinions on the radial screws which propel the jaws. The well-known 'Sweetland' chuck is an example..." The 'Westcott' chuck is also a universal design, but it uses jaws riding in boxes that engage with a helical ring, and each jaw is connected to its box by a screw that may be independently adjusted to move that jaw relative to the others. |
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