Display device

Claim 1

A DISPLAY DEVICE COMPRISING A TANK HAVING A REAR WALL, SIDE WALLS, AND A TRANSPARENT FRONT WALL, A FLUID CONTAINED IN SAID TANK, A SOURCE OF ILLUMINATION POSITIONED TO DIRECT LIGHT WITHIN THE TANK IN THE PATH BETWEEN THE BOTTOM AND TOP OF SAID TANK, A CONDUIT ADJACENT THE BOTTOM OF SAID TANK, SAID CONDUIT BEING INCLINED WHEREBY ONE END THEREOF IS HIGHER THAN THE OTHER END, A PLURALITY OF WIDTHWISELY SPACED APERTURES OF UNIFORM SIZE FORMED IN SAID CONDUIT, A SOURCE OF GAS UNDER PRESSURE CONNECTED WITH SAID OTHER END OF SAID CONDUIT TO DEFINE A SUBSTANTIALLY EVEN BUBBLE PATTERN ADJACENT THE BOTTOM OF SAID TANK, BAFFLES IN SAID TANK IN THE FORM OF SOMEWHAT INCLINED TRANSPARENT STRIPS OF SUBSTANTIAL LENGTH AND HAVING EDGES ABUTTING THE FRONT AND REAR WALLS OF SAID TANK, EACH SAID BAFFLE BEING DISPOSED TO COLLECT BUBBLES IMPINGED AGAINST THE LOWER SURFACE THEREOF AND TO DISCHARGE SAID COLLECTED BUBBLES AT THE END PORTIONS THEREOF IN CONCENTRATED STREAMS, AT LEAST ONE SAID BAFFLE BEING POSITIONED IN SAID TANK VERTICALLY ABOVE AN END PORTION OF ANOTHER SAID BAFFLE SO THAT SAID UPPER BAFFLE WILL COLLECT SAID CONCENTRATED STREAM DISCHARGED FROM SAID END PORTION, AND DISPLAY INDICIA ON SAID TANK BEING POSITIONED SUBSTANTIALLY IMMEDIATELY ABOVE AT LEAST SOME OF SAID BAFFLES WHEREBY SAID INDICIA IS FRAMED BY SAID BAFFLES AND STREAMS.