Progressive liquid display device

Details Progressive liquid display device Progressive liquid display device

1991-10-29

1993-07-20

Brittain, James R.

Card, picture, or sign exhibiting

Display device with free article movement

40439, 446267, 446489, G09F 1900

Patent

active

052282252

ABSTRACT:
A progressive liquid display device comprising a plurality of display strips movably held in a liquid between plural pairs of symmetrical grooves behind a transparent wall, the symmetrical grooves each having a stop plate fastened therein to confine the moving range of the corresponding display strip. The display strips will sink or float when the device is turned upside down and be stopped by the stop plates with one strip rising behind another to form a desired pattern.

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patent: 4837957 (1989-06-01), Egender
patent: 4864752 (1989-09-01), Kent
patent: 4939859 (1990-07-01), Bradt
patent: 4944969 (1990-07-01), Usui

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