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US Patent: 1,049,650
Screwdriver
Patentee:
Rueben B. Benjamin - Chicago, IL

USPTO Classifications:
16/430, 279/104, 76/119, 81/177.1, 81/436, D8/82

Tool Categories:
screwdrivers

Assignees:
Benjamin-Sellar Mfg. Co. - Chicago, IL

Manufacturer:
Benjamin-Sellar Mfg. Co. - Chicago, IL

Witnesses:
E. R. King
Charles G. Cope

Patent Dates:
Applied: Mar. 07, 1911
Granted: Jan. 07, 1913

Patent Pictures:
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Description:
Handle that allows the top to rotate when using light pressure. The top locks to the lower half when more torque is needed by applying pressure to the top of the handle.Samples marked, BENJAMIN and the Patent date.

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