Raymond De Walt's Radial Arm Saw
In 1925 Raymond De Walt patented a direct-drive radial arm saw. As we have seen, the radial arm concept was not new, but putting a direct-drive motor in a yoke attached to a radial arm was.
Drawing from De Walt's 1925 patent
De Walt's follow-up patentsLink to DeWalt Products Co. page
A first-generation DeWalt saw
Other early patents
The Marketplace of Radial Arms and Alternatives¶Machine types: belt drive, direct drive, moving carriage, moving arm, combination machinesCommercial overview up to 1980 or so: DeWalt, Delta, Walker-Turner, Poitras, Comet, Gilson, Wilson, etc. See http://owwm.org/viewtopic.php?t=35533