"Four-in-One" Multi-function Machine Tool
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Built to meet an American Government contract during WW2, and intended for use on board small navel ships, the wonderful Gilman Four-in One" universal machine tool combined several functions: a screwcutting lathe, drill press-cum-light-duty vertical miller with both fine and rapid feeds to the quill, horizontal miller and borer. With its drive system contained in the heavy cast-iron base, the lathe element featured a flat, English-type bed with narrow vertical side guides, a twin-tumbler screwcutting gearbox that was built (to help make the machine as compact as possible), into the support foot, power sliding and surfacing (it appears that a feed gearbox was positioned at the right-hand end of the bed) and a headstock whose casting was extended rearwards to provide a mounting for the horizontal milling machine's round overarm.
It is likely that the standard, fully machined cross slide would have been replaced by a T-slotted boring table when used the machine was to be used as a horizontal borer.
The only known surviving example is held in the superb American Precision Museum in Vermont, a site well worth an extended visit or viewed on-line