The blacksmith's guide : valuable instructions on forging, welding, hardening, tempering, casehardening, annealing, coloring, brazing, and general blacksmithing (1907)
Sallows, J. F. (James Francis), 1865- · Brattleboro, Vt. : The Technical Press · leaf 129
116 THE BLACKSMITH’S GUIDE 1, 2, and 3. The clamps can be made wide enough to hold ten or more blades, which should fit tight in the bottom part C. The top part of clamp A should bind on edge of the blades and be tightened with cap screw B. Pack in fine wood charcoal, using a piece of gas No. 1 A … No. 3 Fig. 4. Device used in Hardening Blades of High-speed Steel. pipe large enough for the purpose, and plug both ends with asbestos cement. Then place in the oven and heat to a very high heat, almost lemon. They should remain in the oven two hours, then take out and dip endwise in hot salt water…
Blacksmithing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
