US Patent: 315,685
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| Lathe-chuck
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Patentee:
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| John Henry Westcott (exact or similar names) - Oneida, Madison County, NY |
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Patent Dates:
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| Applied: |
Dec. 10, 1884 |
| Granted: |
Apr. 14, 1885 |
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Joel Havens
"Vintage Machinery" entry for Westcott Chuck Co.
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Description: |
| Brown & Hall - patent attorneys
A "Little Giant" drill chuck has been seen with the patents dates corresponding to 148,788, 315,684, and 315,685.
The Oneida Steam Engine & Foundry Co. changed its name to Westcott Chuck Co. in about 1886.
My invention relates more particularly to chucks having two jaws with V-shaped faces, which are fitted in a slot or channel extending diametrically across the chuck-body, and are moved toward and from each other by a worm or screw having right and left hand threads; but the invention may be embodied in any chucks in which the slots, seats, or channels for the jaws extend entirely to the outer end of the body and to the circumference thereof. When the chuck-body is thus cut away, it is considerably weakened, and in order to prevent its springing or splitting I reinforce it by applying thereto a ring which encircles the chuck-body, and preferably fits in a circumferential rabbet formed in the outer end of the body. I also notch the jaws at the junction of their ends and edges, and make them to project through the ring to the outer face thereof and to the end of the chuck-body, and then the ring also serves as a stop to prevent the opening of the jaws to take an article larger than the chuck is intended for and to an extent which would endanger the worm or screw by reducing the engagement of its threads with the jaws.
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