US Patent: 308,541
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| Chuck
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Patentee:
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| John H. Westcott (exact or similar names) - Oneida, Madison County, NY |
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Patent Dates:
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| Applied: |
Apr. 07, 1884 |
| Granted: |
Nov. 25, 1884 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Westcott Chuck Co.
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Description: |
| Duell, Laass & Duell - patent attorneys
The Oneida Steam Engine & Foundry Co. changed its name to Westcott Chuck Co. in about 1886.
This invention relates more particularly to the class of jaws which slide radially in grooves or -ways in the chuck, the sides of said jaws being provided with corresponding shoulders or grooves for engaging with those of the chuck, so as to firmly and accurately guide the jaws. The bearing-surfaces of the aforesaid shoulders and grooves require to be fitted perfectly true and closely, so as to effectually prevent lost motion, and thus insure accurate adjustment of the work on the chuck. Inasmuch as the jaw requires to be case-hardened, it has been found difficult to obtain the desired accuracy in the fitting of the jaws to the chuck, the grooves and shoulders formed in the jaw frequently becoming distorted in the process of case-hardening, and cannot, therefore, be planed or dressed by a tool. To obviate this defect I divide the jaw longitudinally, and provide the upper or outer section with longitudinal flanges, and with a plain rectangular longitudinal groove between said flanges, and provide the other section with a rectangular longitudinal tongue, and with longitudinal shoulders along opposite sides of the tongue, which shoulders, together with, the aforesaid flanges, form the channels to receive the guide-ribs in the channels of the face-plate.
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