Geometrical instruments – Scriber – Curved line
Patent
1990-05-23
1991-08-20
Haroian, Harry N.
Geometrical instruments
Scriber
Curved line
266 70, B43L 904
Patent
active
050402994
ABSTRACT:
A base for cutting circular plate with a gas burner comprising a base body to keep itself immovable on the iron plate to be cut by means of magnetism, a rotatable shaft inserting in the base body and combining with and statilizing an arm having a holed base at its end to guide a gas burner kept in the central hole in the holed base so that the gas burner can cut a circular iron plate, moving around in a circle with the rotatable shaft as the center of the circle.
REFERENCES:
patent: 4055824 (1977-10-01), Baermann
patent: 4314219 (1982-02-01), Haraguchi
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