Bubbler display device and method of making same

Details Bubbler display device and method of making same Bubbler display device and method of making same

1976-09-30

1978-01-31

Pitrelli, John F.

Card, picture, or sign exhibiting

Display device with gas or liquid movement

362 92, 362101, 362806, G09F 1324

Patent

active

040707776

ABSTRACT:
A display device for generating bubbles, which may be illuminated, passing through a body of fluid, including a sealed translucent hollow glass tube partially filled with fluid of a low boiling point and evacuated of air, a chamber of a diameter less than that of the tube secured to the bottom end of the tube, and a heat source associated with the chamber. In one embodiment of the invention the chamber consists of a mass of agglomerated prismatic particles bonded to the bottom of the tube. In another embodiment of the invention, the chamber consists of a closed glass tube having a heater therein which is open on one end for discharge of bubbles into the sealed tube. The invention also includes the method for making such a bubbler device.

REFERENCES:
patent: 2383941 (1945-09-01), Otis
patent: 2520691 (1950-08-01), Otis
patent: 2741693 (1956-04-01), Fasson
patent: 3499238 (1970-03-01), Publicker
patent: 3755663 (1973-08-01), George
patent: 3903628 (1975-09-01), Goyeau

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