Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1976-10-26
1978-05-23
Pinkham, Richard C.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
33289, A63B 6700
Patent
active
040907082
ABSTRACT:
Apparatus for providing illuminated columns or signals for use as first down lines of demarcation on football fields. The signs may comprise: (1) a single laser light beam having a luminous horizontal segment directed across the field and serving as an overhead line of demarcation, in combination with a relatively lower parallel luminous segment of the same beam, reflected reversely across the field and serving as a ground line of demarcation, or (2) two oppositely travelling light beams having a pair horizontal luminous segments serving as a composite overhead line of demarcation, in combination with a second pair of horizontal relatively lower luminous segments of the same beams serving as the ground line of demarcation, or (3) either the overhead or the ground line of demarcation of the last-named combination. During a game, the sign is used as a reference by game officials, players, and spectators for approximating and/or determining the relative position of a football lying on the field at the beginning of or between successive downs.
REFERENCES:
patent: 3741662 (1973-06-01), Pioch
patent: 3752588 (1973-08-01), Chapman
patent: 3810148 (1974-05-01), Kersten
patent: 3816000 (1974-06-01), Fielder
patent: 3985356 (1976-10-01), Carlock
Brown T.
Brown, Jr. Robert
Pinkham Richard C.
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