Cutlery – Scratching implements – Having traction-rotated tool
Patent
1985-02-11
1987-09-08
Watts, Douglas D.
Cutlery
Scratching implements
Having traction-rotated tool
10293, B26B 300
Patent
active
046914382
ABSTRACT:
The cutter is a tool used to manually score a flat sheet of glass which lies on a thin resilient cover on a table. With this tool, the force applied by the cutting (scoring) wheel cannot exceed a preset limit even though a greater force is applied on the handle. Thus a deleterious excessive scoring force cannot be applied. The cutting wheel is mounted in a pillar post (wheel holder). The pillar post slides in a slot cut in the lower portion of the handle. The post is mounted to the free end of the prestressed spring wire. When not scoring, the spring urges the post (and wheel) downward. This movement is limited by a spring stop so that the cutting wheel projects 1/8 inch or less below the slot legs. When the cutter is applied to score the glass a manual force is applied to the handle. The wheel and pillar are forcibly retracted into the slot in the handle, until the bottoms of the wheel and slot legs all bear on the glass. The applied force is AF and the scoring force is CF. CF is less than AF. CF is fixed and limited by the spring. A residual force RF, is applied by the slot legs on the glass.
REFERENCES:
patent: 2341030 (1944-02-01), Fletcher
patent: 2685764 (1954-08-01), Hatfield
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