Advertising billboard showing a multiplicity of subjects

Claim 1

A BILLBOARD FOR DISPLAYING A PLURALITY OF DIFFERENT PICTURES, AT LEAST SOME OF SAID PICTURES CONSISTING OF A SERIES OF STRIPS LOCATED ONE NEXT TO THE OTHER BUT OUT OF ALINEMENT WITH EACH OTHER, SAID BILLBOARD COMPRISING A FIXED FRAME, GUIDING MEANS CONNECTED WITH SAID FRAME, A SEPARATE MOVING FRAME SUPPORTING EACH SERIES OF MOVABLE STRIPS, RINGS CARRIED BY EACH MOVING FRAME AND ENGAGING SAID GUIDING MEANS, A CONNECTING ROD, MEANS RECIPROCATING SAID CONNECTING ROD, A ROTARY DISC HAVING CIRCUMFERENTIAL RECESSES; PINS CIRCULARLY MOUNTED UPON SAID DISC, SAID CONNECTING ROD HAVING A HOOK AND A SLOPING SURFACE ADJACENT SAID HOOK, SAID SLOPING SURFACE SLIDING OVER ONE OF SAID PINS WHEN SAID CONNECTING ROD MOVES IN ONE DIRECTION AND SAID HOOK ENGAGING THE LAST-MENTIONED PIN TO TURN SAID DISC WHEN SAID CONNECTING ROD MOVES IN THE OPPOSITE DIRECTION; RESILIENT LOCKING MEANS HAVING A BLOCK YIELDABLY ENGAGING ONE OF SAID RECESSES TO HOLD SAID DISC IN ONE OF A PLURALITY OF POSITIONS, A SHAFT ROTATABLE ALONG WITH SAID DISC, A PLURALITY OF CAMS FIXED UPON SAID SHAFT, THE NUMBER OF SAID CAMS BEING EQUAL TO THAT OF SAID SERIES. A SEPARATE LEVER HAVING AN END ACTUATED BY EACH CAM, AND SEPARATE PULL ROD MEANS CARRIED BY ANOTHER END OF EACH LEVER AND CONNECTED TO A SEPARATE MOVING FRAME.