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
a special TIFF viewer must be installed with your browser in order properly work.
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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948,131
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Jan. 29, 1964
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Improvements in or relating to lathes
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Harry Bairstow Berry |
, England |
"The invention relates to lathes incorporating leadscrews and has as its object the provision of a new or improved method of and means for automatically compensating for and correcting errors in leadscrews whereby very high degrees of accuracy may be attained and maintained by such lathes during their operation at all times. According to the invention a lathe incorporating leadscrew and saddle moved thereby is provided with an electromotor and coupling unit to the leadscrew for axially moving the said screw to automatically compensate for errors in accuracy in the screw, the said unit being automatically controlled by photoelectric scanning apparatus mounted in the saddle and arranged to co-act with and feed information carried by a stationary correcting member." |