 1. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft, substantially as described. 2. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to theaxis of rotation of the shaft and provided with an anti-frietion sleeve, substantially as described. 3. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft and also having a portion of said crank-wrist intermediate the diagonal termination and the arm of the crank parallel with the axis of rotation of the cranked shaft, substantially as described. 4. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at the end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft, and also having a portion of said crank-wrist intermediate the diagonal termination, and the arm of the crank parallel with the axis of rotation of the cranked shaft, said parallel portion of the wrist provided with an anti-friction sleeve, substantially as described. 5. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank-arm diagonal relative to the axis of rotation of the said shaft and provided -friction sleeve, as D', said crank-arm having a wrist which terminates said shaft at its other end, the said wrist diagonal relative to the axis of rotation of the said shaft, substantially as described. JOHN F. STEWARD.
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Made following
the teachings of US Patent No.460,256, long expired.
The usual carpenter's brace is properly termed a double-crank brace because there's a return crank as well as a primary crank, enabling the user to push with his chest or with his other hand. These are single-crank braces, but with a wrinkle: The handle spins freely on a tilted axis, enabling the user to turn the crank without rotating his wrist and without having to release and re-grasp the handle as for a common, rigid screwdriver. The bottom-most of the four braces was made recently in Kansas by a supplier to an organ manufacturer and given to me by Steve Heider. The other three came from New Mexico. All four appear to have been made by the same hands. The Phillips bit driver has an extra feature to enable the user to tighten the screw with a boost from the thumb. John Steward had
an
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