If you find a patent number or patent date by this manufacturer that is not on this
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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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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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1,778,492
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Oct. 14, 1930
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Quick-acting vise
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Ambrose Everts Greene |
Berkeley, CA |
This quick-acting vise was designed for easy machining. It used cold-rolled steel bar for sliding and reinforcing parts as that material was relatively inexpensive and dimensionally accurate. A screw with undercut threads could be engaged or disengaged from an open-sided nut.
This patent was from one of a pair of patent applications. It appears that the other application was never granted. The inventor, Ambrose Everts Greene, appears to have been a professional inventor/engineer who specialized in designing novel engines. Click on his name to see his other patents. |