Digital number indicator

Details Digital number indicator Digital number indicator

1987-07-24

1989-06-13

Mancene, Gene

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40491, 40598, G09F 700

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active

048379573

ABSTRACT:
A numerical display especially for use as a down marker in football games. The numbers which are displayed are painted on sets of slats which slide up and down by operation of finger levers connected to the slats by a special linkage. The slats slide behind other slats in a concealed position and are visible in an exposed position through transparent windows of a padded housing which encloses the operating components. A frictional detent retains the levers in place to prevent inadvertent slipping of the number which is displayed.

REFERENCES:
patent: 1573344 (1926-02-01), Jordan
patent: 2117187 (1938-05-01), MacLaren
patent: 2799105 (1957-07-01), Tilley
patent: 2833066 (1958-05-01), Morrissey

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