US Patent: 520,091 - Screwdriver


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US Patent: 520,091

Screwdriver

Patentee:

James Swan (exact or similar names) - Seymour, CT

USPTO Classifications:

112/80.03, 279/102

Tool Categories:

screwdrivers : screwdriver handles

screwdrivers : screwdriver blades

Assignees:

None

Manufacturer:

James Swan Co. - Seymour, CT

Witnesses:

Orrilla E. Hurlburt

T. Richard Hurlburt

Patent Dates:
Applied:	Feb. 05, 1894
Granted:	May 22, 1894

Patent Pictures: [ 1 | 2 ]

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"Vintage Machinery" entry for James Swan Co.

Description:

Ferrule is designed so that once it is in position on the handle and the blade is driven into place it locks to both the handle and the blade and cannot be removed or loosened until the handle is broken away.