Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1984-04-24
1985-09-17
Frankfort, Charles
Geometrical instruments
Straight-line light ray type
Structurally installed
124 87, F41G 100
Patent
active
045411794
ABSTRACT:
A sighting device for a bow which is fixedly mounted on a bow and which is provided with a lever and link arrangements such that a sight unit thereof is tilted at a progressively increasing rate as the sighting device is adjusted for longer distances so as to compensate for gravity effect on arrows. Also, the sight unit is so mounted whereby it tilts relative to the bow in a manner wherein the sight unit generally lies in a plane which is normal to the sighting axis therethrough for all adjustments of the sighting device.
REFERENCES:
patent: 2642661 (1953-06-01), Fredrickson
patent: 3013336 (1961-12-01), Pennington
patent: 3318298 (1967-05-01), Bear
patent: 3487548 (1970-01-01), Frydenlund
Breiner A. W.
Frankfort Charles
Scanlon Patrick R.
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