Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1980-08-25
1982-04-20
Haroian, Harry N.
Geometrical instruments
Straight-line light ray type
Structurally installed
33241, 33366, F41G 100
Patent
active
043251900
ABSTRACT:
A bow sight for determining proper range includes an energy source and a series of mercury tilt switches, each of which becomes operable at a different predetermined angle of bow inclination. A series of light emitting sight pins are connected to the tilt switches via an electronic circuitry that allows for the energization of a different sight pin for a different angle of bow inclination.
REFERENCES:
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patent: 3074049 (1963-01-01), Saliba et al.
patent: 3945127 (1976-03-01), Spencer
patent: 4048726 (1977-09-01), LeFebvre
patent: 4120096 (1978-10-01), Keller
patent: 4134383 (1979-01-01), Flood
patent: 4170071 (1979-10-01), Mann et al.
patent: 4177572 (1979-12-01), Hindes
patent: 4179613 (1979-12-01), Koren
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