Liquid display device

Details Liquid display device Liquid display device

1993-02-12

1995-05-23

Green, Brian K.

Card, picture, or sign exhibiting

Display device with gas or liquid movement

40414, 446267, G09F 1900

Patent

active

054169941

ABSTRACT:
A liquid display device comprises an elongated, transparent, cylindrical display tube containing a column of liquid and including a light-transmitting base. A pedestal supports the display tube and includes a light-transmitting top plate on which the base of the display tube is seated. An impeller within the display tube rotates the liquid within the tube. The pedestal contains a reversible motor for driving the impeller, lights for lighting the contents of the display tube through the light-transmitting base and top plate, and air pumps for forcing air into the liquid within the display tube. A series of timers controls the operation of the motor, air pump and lights to create continuously changing turbulence patterns in the liquid.

REFERENCES:
patent: 2160474 (1939-05-01), Jones et al.
patent: 3589044 (1971-06-01), Morrison et al.
patent: 3711698 (1973-01-01), Hess
patent: 4190312 (1980-02-01), Bailey
patent: 4265402 (1981-05-01), Tsai
patent: 4490931 (1985-01-01), Fleemin
patent: 4831757 (1989-05-01), Sheehan
patent: 5018288 (1991-05-01), yang
patent: 5272604 (1993-12-01), Lin

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