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US Patent: 93,534
Improvement in mortising-chisel
Carl Hinz - San Francisco, CA

USPTO Classifications:

Tool Categories:
woodworking tools : chisels : mortise chisels



J. L. Boone
George H. Strong

Patent Dates:
Granted: Aug. 10, 1869

Patent Pictures:
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"The object of my invention is to provide an improved chisel, to be used for cutting mortises designed for receiving pulleys, or other pieces of mechanism, which require a shallow mortise cut around the main one for the purpose of receiving the flange, or other device, by which the pulleys are attached to the timber; and consists of a mortising-chisel, having a shorter adjustable one above it, and placed far enough from it to give the desired width of shallow mortise. By adjusting the shorter chisel, any desired depth or width of shallow mortise can be given, the whole being performed at one operation, with great accuracy and celerity."

This chisel was seen in an 1890 Rowley & Hermance catalog: "Patent Frame Mortise chisel. We here present an entirely new and novel Chisel for Mortising in Sash Pulleys. ... Price, $10.00".

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