US Patent: 398,986 - Screw-Driver


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US Patent: 398,986

Screw-Driver

Patentee:

Carl A. Strasser (exact or similar names) - Baltimore, MD

USPTO Classifications:

81/61, 81/63

Tool Categories:

screwdrivers : screwdriver mechanisms : ratcheting screwdrivers

wrenches : ratchet wrenches

Assignees:

Carl A. Strasser - Baltimore, MD

Christina Schroeder - Baltimore, MD

Manufacturer:

Strasser and Schroeder Tool Works - Baltimore, MD

Witnesses:

Fred. G. Dieterich

P. B. Turpin

Solon C. Kemon

Patent Dates:
Applied:	Aug. 30, 1888
Granted:	Mar. 05, 1889

Patent Pictures:

Carl A. Strasser patent March 5, 1889, with Strasser and Schroeder ratchet -- Dan Chiriboga collection

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Description:

Ratchet action. The handle and frame are a single piece, with a retaining plate on one side. The specifications describe a head with screwdriver blades on both sides or with a slot for blade inserts.

Known example appears as a ratchet wrench; a period advertisement for Strasser's Screwdriver and Wrench reprinted in Ken Cope's "American Wrench Makers 1830-1930" also shows the ratchet screw driver version.