Registers – Calculators – Single axis
Patent
1979-02-12
1982-05-11
Hix, L. T.
Registers
Calculators
Single axis
235 70A, 235 88R, G06C 2700
Patent
active
043295703
ABSTRACT:
A calculating device and a method of use thereof for determining the lead required to shoot a projectile at a moving target including cooperating logarithmic scales with indicia corresponding to the parameters target speed, range, projectile speed and lead displayed on a fixed and a slide member. Pictorial markers representative of various projectiles are disposed along the projectile velocity scale at locations corresponding to their normal speed and words descriptive of target speed are disposed at appropriate locations along the target speed scale so that calculations may be made by persons not having knowledge of game and projectile speeds in numerical terms. In accordance with one embodiment of the invention, the logarithmic scales are longitudinally disposed and the slide member may move relative to the fixed member in a horizontal direction. In accordance with other embodiments of the invention, the scales are disposed in a circular arc on members which may be rotated about a common axis.
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Fuller Benjamin R.
Hix L. T,.
LeadRite Corporation
Nixon Larry S.
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