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US Patent: 181,650
Improvement in Saw Blades
Double Taper Saw Blade
Patentee:
Henry Disston - Philadelphia, PA

USPTO Classifications:
76/112, 83/835

Tool Categories:
woodworking tools : handsaws

Assignees:
None

Manufacturer:
Henry Disston & Sons - Philadelphia, PA

Witnesses:
Harry Smith
Harry Howson Jr

Patent Dates:
Applied: Jan. 21, 1876
Granted: Aug. 29, 1876

Patent Pictures:
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"Vintage Machinery" entry for Henry Disston & Sons
Description:
Handsaw blade's double taper is accomplished by rolling rather than previous method of grinding which wasted metal and reduced toughness of the blade.

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