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US Patent: 393,419
Screw Driver
Patentee:
Felix Chantrell - Reading, PA

USPTO Classifications:
81/29

Tool Categories:
screwdrivers : screwdriver mechanisms : ratcheting screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. J. Dwight
A. Tegethoff
Morris H. Schaffer
Adam B. Rieser

Patent Dates:
Applied: Mar. 06, 1888
Granted: Nov. 27, 1888

Patent Pictures:
Felix Chantrell patent November 27, 1888
USPTO pdf tiff
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Description:
The interior of the handle has gripping teeth matching gripping teeth on the top of the shank of the screwdriver blade, with a compression spring to separate them. This allows the handle to operate in "ratchet" fashion.

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