also metallurgist? active in Sheffield, England; {possibly different Ibbetson?)

1817:John Holt Ibbetson, Specimens of Eccentric Circular Turning, with Prac­tical Illustrations for producing Corresponding Pieces in that Art.

1833: "A Brief Account of Ibbetson's Geometric Chuck, manufactured by Holtzapffel & Co., with a selection of 32 Specimens, illustrative of some of its powers. By J. H. lbbetson, Esq."