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US Patent: 151,167
Improvement in Tempering Ovens for Steel and Iron
Patentee:
George F. Simonds (exact or similar names) - Fitchburg, MA

USPTO Classifications:
432/225

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

Assignees:
Simonds Manufacturing Co. - Fitchburg, MA

Manufacturer:
Not known to have been produced

Witnesses:
Alfred Hitchcock
Alvan A. Simonds

Patent Dates:
Granted: May 19, 1874

Reissue Information:
Reissued as RE7,464 (Jan. 16, 1877)

Patent Pictures:
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Description:
Claims even distribution of heat utilizing an intervening preforated plate between the fire and clamps as well as patenting the general construction method of utilizing passages, a hot air chamber, and tiles to further distribute the heat. George Simonds references this patent in his application for Patent No. 169,736. Additionally, this appears to be an improvement over Patent No. 150,625 which uses clamps to prevent warping of the circular saw blade.

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