Picture projection apparatus

Claim 1

IN A PICTURE PROJECTION APPARATUS, THE COMBINATION OF AN ELONGATED TUNNEL HAVING FRONT AND REAR ENDS AND COMPRISING A PLURALITY OF SLIDABLY TELESCOPED SECTIONS WHEREBY THE TUNNEL MAY BE EXTENDED AND CONTRATED IN LENGTH, SAID TUNNEL SECTIONS BEING REARWARDLY TAPRED WHEREBY THE TUNNEL IS OF A SMALLER CROSS-SECTION AT THE REAR END THAN AT THE FRONT END THEREOF, A CASING PROVIDED AT THE FRONT END OF SAID TUNNEL AND HAVING AN OPEN FRONT, A TRANSLUCENT SCREEN MOUNTED IN THE OPEN FRONT END PORTION OF SAID CASING, SAID TUNNEL SECTIONS BEING RETRACTABLE INTO SAID CASING BEHIND SAID SCREEN WHEN THE TUNNEL IS CONTRACTED, DETACHABLE LEG MEANS DEPENDING FROM SAID CASING FOR SUPPORTING THE SAEM AT AN ELEVATION ABOVE A SUPPORTING SURFACE, A SUBSTANTIALLY UPRIGHT PANEL DETACHABLY MOUNTED AT THE REAT END OF SAID TUNNEL AND FORMED WITH AN OPENING COMMUNICATING WITH THE INTERIOR OF TUE TUNNEL, SAID PANEL HAVING A LOWER EDGE ADAPTED TO REST UPON THE STATED SUPPORTING SURFACE FOR SUPPORTING THE REAR END OF THE TUNNEL AT AN ELEVATION ABOVE THE STATED SURFACE, THE SIZE OF SAID PANEL CONFORMING SUBSTANTIALLY TO THAT OF THE OPEN FRONT OF SAID CASING WHEREBY THE PANEL MAY FORM A CLOSURE FOR SAID OPEN FRONT UPPON ITS DETACHMENT FROM THE REAR END OF SAID TUNNEL, AND A CLOOAPSIBLE PLATFORM CARRIED BY SAID PANEL FOR MOUNTING A PROJECTOR WHEREBY A PICTURE MAY BE PROJECTED THROUGH SAID PANEL OPENINGH AND THROUGH SAID TUNNEL ONTO SAID SCREEN.