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US Patent: 377,783
Rotary tool driver
Patentee:
George Frederick Shaver (exact or similar names) - New York, NY

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
Shaver Corp. - New York, NY

Manufacturer:
Shaver Corp. - New York, NY

Witnesses:
Andrew Powell
Lewis Hurst

Patent Dates:
Applied: Sep. 03, 1887
Granted: Feb. 14, 1888

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ]
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Description:
The Patent drawing shows an interchangeable bit but the only known examples have a one piece rotary shank screwdriver that will only drive screws. In the fully closed position the shaft locks and they will remove screws.

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