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US Patent: 148,566
Griping and Cutting Tools
Patentee:
De Lancy Kennedy - New York, NY

USPTO Classifications:
30/192, 30/363, 606/184

Tool Categories:
metalworking machines : metal shears
pliers : nippers

Assignees:
None

Manufacturer:
Pratt & Whitney Co. - Hartford, Hartford County, CT

Witnesses:
William Carpenter
Gershom Van Allen
C. C. Nilson
William E. Chaffee

Patent Dates:
Applied: Nov. 04, 1873
Granted: Mar. 17, 1874

Patent Pictures: [ 1 | 2 ]
De Lancey Kennedy patent March 17, 1874
USPTO pdf tiff
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"Vintage Machinery" entry for Pratt, Whitney & Co.
Description:
Compound leverage applied to nippers, shears, punches, etc.

A known application of the principle was a metal cutting shears.

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