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US Patent: 557,615
Parallel Jaw Pliers
Patentee:
Adolf Schatz - New Haven, CT

USPTO Classifications:
81/353

Tool Categories:
pliers

Assignees:
None

Manufacturer:
Bridgeport Manufacturing Company - Bridgeport, CT

Witnesses:
William Mueser
N. Tanzer

Patent Dates:
Applied: Feb. 20, 1895
Granted: Apr. 07, 1896

Patent Pictures: [ 1 | 2 ]
Adolf Schatz patent April 7, 1896
USPTO pdf tiff
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Description:
The parallel jaw action is provided by a wedge-shaped piece mounted on the central pivot. The back of the jaws are slightly curved, and slide on this wedge as the pliers are opened or closed. The specifications note the handles may be made of metal, wood or celluloid. The specifications also list the sequence of assembling the parts.

"A. SCHATZ PATENT" around the pivot screw of a parallel jaw cutting pliers announced to the trade in January, 1897 by Bridgeport Mfg. Co. of Bridgeport, CT is evidence this and Schatz's subsequent patent no. 571,021 were used.

Wm. Schollhorn Company brought suit against Bridgeport Manufacturing Company alleging infringement on patent no. 427,220. Bridgeport's pliers were found to infringe, Bridgeport Mfg. appealed, and lost. (Bridgeport Manufacturing Company et. al. v. William Schollhorn Company - Jan. 2, 1899).

Schatz also registered a British patent (GB-189614926 registered July 6, 1896) for a cutting jaw version.

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