If you find a patent number or patent date by this manufacturer that is not on this
list, please contact the Site Historian.
Key to Links for Patent Information
USPTO = U.S. Patent Office .
Images of the actual patent can be viewed on the U.S. Patent Office web site but
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More information on how to configure your computer to view these patents can be
found at TIFF image Viewers
for Patent Images.
DATAMP = Directory of American Tool And
Machinery Patents . A sister site to VintageMachinery.org with information
on patents related to machinery and tools. A much easier user interface than the
USPTO's for finding information on machinery patents.
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1,900,922
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Mar. 14, 1933
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Gripping Face for Chucks and Method Of Making the Same
|
Leigh R. Evans |
Elmira, Chemung County, NY |
Claim:
A chuck having a stock engaging face provided with wear-resisting portions in which a shallow recess is formed in said iace, and an insert of a hard, brittle metallic material having relatively low tensile strength welded in said recess to the metal of said chuck, with the metal of the chuck forming a reinforcement on all sides except the face of the insert. |