Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1977-11-18
1979-05-15
Stearns, Richard R.
Geometrical instruments
Straight-line light ray type
Structurally installed
F41G 146
Patent
active
041539990
ABSTRACT:
An archery bow sighting arrangement and method characterized by the use of a mechanical scale for establishing the desired shooting range, the sight point being determined by the intersection of a cursor or index line and calculated scale lines representing the various range distances. The cursor line may be movable with respect to a fixed pattern of scale lines or the cursor line may be fixed and the scale lines rotatable. The invention permits the instantaneous setting of sight markings, in contrast to the present approach of separately marking a piece of tape for each distance.
REFERENCES:
patent: 2461122 (1949-02-01), McQuitty
patent: 3355809 (1967-12-01), Guyton
patent: 3568323 (1971-03-01), Lendway
patent: 3854217 (1974-12-01), Killian
patent: 4020560 (1977-05-01), Heck
Flackbert Warren D.
Stearns Richard R.
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