Triangulation rangefinder for archers

Details Triangulation rangefinder for archers Triangulation rangefinder for archers

1994-06-17

1996-01-02

Cuchlinski, Jr., William A.

Geometrical instruments

Straight-line light ray type

Structurally installed

33228, 33262, 33701, 124 88, F41B 514

Patent

active

054797128

ABSTRACT:
An archery rangefinder for use from an elevated position comprises a power supply for an electronic digital panel meter and a power supply for two voltage divider circuits that comprise the rangefinding circuit. One voltage divider provides a voltage signal proportional to the elevation distance. This signal acts to supply the second voltage divider to attenuate the voltage further by a factor proportional to the tangent of the inclination angle. A weighted pendulum arm is attached to a potentiometric element in the second voltage divider to effect feedback relevant to the angle of inclination. All circuits and components are housed within an outer protective enclosure. Voltage across a fixed resistor in the second voltage divider is read and displayed by said digital panel meter as the range which is then used by the archer to increase accuracy of shots.

REFERENCES:
patent: 3696517 (1972-10-01), Larson
patent: 4120096 (1978-10-01), Keller
patent: 4551847 (1985-11-01), Caldwell
patent: 4580349 (1986-04-01), Webb et al.
patent: 4785541 (1988-11-01), Lowry
patent: 4787739 (1988-11-01), Gregory
patent: 4796364 (1989-01-01), Amacker
patent: 4894291 (1990-01-01), Barlow
patent: 4974328 (1990-12-01), Lowry
patent: 4984372 (1991-01-01), Blizzard
patent: 5229828 (1993-07-01), Wiklund

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