As this cylinder rotates, these three segments make contact alternately with the brushes 1.2 and 3 in turn. The brush No.1 is connected to lamps L,, the brushes No.2 and 3 are connected the copper segment No.1 makes contact with the brush No.1, it Lights all the lamps L1. As the cylinder rotates through 1/3rd of the revolution the circuit No.1 goes off and just at the same instant circuit No.2 becomes alive and lights all the lamp L2, and after a further 1/3 of the revolution the circuit No.3 becomes alive and lights all the lamps L3 and in such a system of lighting, the lamps circuit is repeated and it so appears that the lights move from right to left;
Such moving effects of lights can be used to show Waving Flag, Flickering light or Lighting etc.
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