Football yardline locating device

Details Football yardline locating device Football yardline locating device

1978-11-14

1980-11-11

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Alignment device

33137L, 33274, G01B 1126

Patent

active

042324505

ABSTRACT:
An object such as a football lying on a playing field is optically sighted through a measuring plane from a remote location. An adjustable framing assembly outlines the field as viewed in the measuring plane and mounts scale means to enable rapid measurement of the object location on the field.

REFERENCES:
patent: 915426 (1909-03-01), Gohring
patent: 1401591 (1921-12-01), Doggett
patent: 1490659 (1924-04-01), Carlozzi
patent: 2222297 (1940-11-01), Mesjian
patent: 2539560 (1951-01-01), Wilson

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