Sign with colored fluid

摘要: 1,062,838. Changing signs. GATAG Ltd. Nov. 19, 1965 [Nov. 28, 1964], No. 49205/65. Heading G5C. An indicator comprises superposed transparent plates 4, each having recesses 5, the in any one or more plate(s) being selectively filled with a coloured fluid to form representation. The are backed by translucent plate 8 and representations may be illuminated tubes 15 reflected light. liquid ethyl alcohol, contain reflective fluorescent components. is supplied an electromagnetically operated pump 20 overflows into containers 13. supply 9 magnetically actuated valve 11 should representation need shown over period of time. If all same colour single tank 10 used.