1680 J. Moxon I. xiv. 242 These Oval-Engines, Swash-Engines, and all other Engines.
1780 (Royal Soc.) 70 382 In the turning of ovals, the top of the rest which supports the tool is always made to pass through..the two centers round which the oval engine turns.
1864 S. Smiles 257 We find Mr. Thomas Oldfield..named as an excellent maker of oval-engines.