Display device with orbitally movable plates

Details Display device with orbitally movable plates Display device with orbitally movable plates

1976-05-03

1977-05-10

Peshock, Robert

Card, picture, or sign exhibiting

Check, label, or tag

Reinforced

G09F 1100

Patent

active

040219445

ABSTRACT:
An opaque face plate has arrays of openings which are each arranged to form numerals when light is transmitted through a predetermined selection of openings. A plurality of opaque back plates are movably mounted behind the face plate, each back plate having an array of openings positioned to coact with face plate openings to form different numerals depending upon the position of movement of the back plate. Each back plate is driven in an orbital path in a plane parallel to the plane of the face plate by means which includes a slot in the back plate, and cam means coacting with said slot.

REFERENCES:
patent: 2263281 (1941-11-01), Von Tadden
patent: 3357120 (1967-12-01), Pennington et al.
patent: 3683524 (1972-08-01), Polonsky
patent: 3783539 (1974-01-01), Trame

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