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
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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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474,060
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Oct. 25, 1937
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Improvements relating to machines for bending sheet metal
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John Liston Dalrymple |
, England |
This type of machine is variously known a paneling machine, a wheeling machine, or an English wheel, and is used in forming sheet metal. This patent machine is particularly intended for forming sheet aluminum for aircraft skins where the parts have tight curves subtending a large angle so that the usual machine frame would interfere with the movement of the workpiece. This is the well-known Ranalah wheeling machine made by Ranalah Ltd. from 1936 into the 2010s. These machines are still used in the restoration of vintage airplanes and automobiles. |