Saw Plate Steel Rolled from a Crucible Ingot

Saw blades start as thin steel plate. In the 1880s Disston's works cast crucible steel into flat ingots, cut each ingot into pieces, rolled every piece to the gauge of the saw and sheared it to outline; one handsaw plate was split diagonally to make two tapered blades (Grimshaw, Saws, 1882). The picture: our diagram, ingot to rolls to plate, with the diagonal split.