Geometrical instruments – Gauge – Tool
Patent
1988-03-18
1989-09-05
Cuchlinski, Jr., William A.
Geometrical instruments
Gauge
Tool
B23D 5900, G01B 520
Patent
active
048625930
ABSTRACT:
A hook angle gauge having a bar with a straight bottom edge that lays across the cutting corners of successive cutting links in a length of saw chain. A face plate includes a series or row of holes or openings that simulate the cross section of the file used to sharpen the cutting links. Different height placements of the openings relative to the bar edge indicate different hook angles. An operator slides the face plate across a selected cutting link side plate until an opening therein matches the configuration of the side plate cutting edge. Each opening is marked with the hook angle setting indicated by that opening to enable the operator to determine the cutting link's hook angle.
REFERENCES:
patent: 2705376 (1955-04-01), Cox
patent: 3055115 (1962-09-01), Tyrrell
patent: 4567792 (1986-02-01), Baldwin
"Chain Saw Age", p. 46, Radius Gauge Reveals Grinding Accuracy, Silvey Radius Gauge, Nov. 1986.
Blount, Inc.
Cuchlinski Jr. William A.
Harrington Robert L.
Will Thomas B.
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