Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1987-04-13
1988-08-09
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Structurally installed
33257, F41G 146
Patent
active
047618884
ABSTRACT:
The archery bowsight of this invention includes windage and elevation carriages which are adjustable by rack and gear connections, and also includes a bubble level the axis of which is adjustable relative to said carriages to position it perpendicular to the longitudinal axis of an arrow supported on the arrow rest of the archery bow.
REFERENCES:
patent: 3355809 (1957-12-01), Guyton
patent: 3854217 (1974-12-01), Killian
patent: 3864836 (1975-02-01), Haines
patent: 4142298 (1979-03-01), Killian
patent: 4368581 (1983-01-01), Tullos
patent: 4567668 (1986-02-01), King et al.
patent: 4625421 (1986-12-01), Strauss
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