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US Patent: 425,279
Reversible jaw for chucks
Scroll chuck jaws for metal lathes
Lucius E. Whiton - New London, CT

USPTO Classifications:

Tool Categories:
metalworking machines : metal lathes : metal lathe chucks


D. E. Whiton Machine Co. - New London, CT

Frank H. Allen
D. E. Whiton

Patent Dates:
Applied: Jul. 12, 1889
Granted: Apr. 08, 1890

Patent Pictures:
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"Vintage Machinery" entry for D. E. Whiton Machine Co.
These chuck jaws are described in detail in an 1896 catalog from D. E. Whiton Machine Co. It that this type of jaw "is best adapted to the smaller sizes, in which the Jaws may be very conveniently run out to be reversed. This style Jaw avoids the necessity for using small screws to fasten the parts, and the steps in the Jaws, being solid, may be trued up whenever necessary." Another style of jaw is recommended for larger chucks where it would take too long to unscrew them to reverse them; instead, the jaws slide into dovetailed ways and are held in place with a screw. For both types of jaws it says, "It should be understood that we do not recommend these Reversible Jaws

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