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US Patent: 65,946
Improved Apparatus for Tempering Steel Plates
Christopher Richardson - Newark, NJ

USPTO Classifications:
266/249, 432/194, 432/231

Tool Categories:
woodworking machines : specialty machines : tool making machines
woodworking tools : handsaws


Not known to have been produced

Wm. C. Richardson
John Edmondson

Patent Dates:
Granted: Jun. 18, 1867

Patent Pictures:
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Two plates are placed in a heated chamber and are forced together with a screw and the saw or other steel plate for tempering placed between them. Richardson does not claim the use of pressure in tempering since that is already been done using hydraulic and lever pressure. Similar to his later patent, 157296.

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