Geometrical instruments – Gauge – Circular size
Patent
1989-04-14
1991-10-08
Haroian, Harry N.
Geometrical instruments
Gauge
Circular size
33277, 33485, G01B 508
Patent
active
050542060
ABSTRACT:
A projection scale apparatus and method uses a projection scale on the chain guide of a chain saw. The throttle of the chain saw may be continuously manipulated to prevent the saw from stalling while the diameter of a tree is measured with a scale provided on the chain guide.
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