Tenebrescent display tube

Claim 2

A DISPLAY TUBE COMPRISING A VACUUMIZED ENVELOPE, AN ELECTRON GUN IN THE ENVELOPE FOR PRODUCING A BEAM OF ELECTRONS, A TARGET STRUCTURE IN THE ENVELOPE COMPRISING AN ENDLESS BELT HAVING A SURFACE OF ELECTRON-SENSITIVE MATERIAL DISPOSED IN THE PATH OF THE ELECTRON BEAM, MEANS FOR CAUSING THE ELECTRON BEAM TO TRANSVERSELY SCAN THE BELT TO PRODUCE AN IMAGE THEREON CORRESPONDING TO AN ELECTRICAL SIGNAL APPLIED TO THE ELECTRON GUN, AND MEANS FOR ROTATING THE BELT TO PRESENT NONIMAGE-BEARING MATERIAL TO THE SCANNING ELECTRON BEAM, SAID TARGET STRUCTURE COMPRISING A FRAMEWORK INCLUDING A PAIR OF LONGITUDINALLY EXTENDING SPACED SIDE RODS AND A PAIR OF ROTATABLE SHAFTS SUPPORTED BETWEEN THE RODS AT OPPOSITE ENDS THEREOF, SAID RODS CARRYING SPRING MEMBERS THEREON IN RESILIENT ENGAGEMENT WITH THE WALLS OF SAID ENVELOPE FOR MAINTAINING THE FRAME IN SPACED RELATION THEREWITH AND FRO PERMITTING EXPANSION AND CONTRACTION UNDER VARYING THERMAL STRESSES, SAID BELT BEING MOUNTED OVER THE SHAFTS AND ROTATABLE THEREWITH.

Claim 3

A DISPLAY TUBE COMPRISING A VACUMMIZED ENVELOPE, AND ELECTRON GUN IN THE ENVELOPE FOR PRODUCING A BEAM OF ELECTRONS, A TARGET STRUCTURE IN THE ENVELOPE COMPRISING AN ENDLESS BELT HAVING A SCROLL THEREON OF ELECTRON-SENSITIVE MATERIAL DISPOSED IN THE PATH OF THE ELECTRON BEAM, SAID SCROLL COMPRISING A FIRST LAYER OF CHEMICALLY RESISTANT MATERIAL, A SECOND LAYER OF ETCHIBEL MATERIAL DISPOSED ON SAID FIRST LAYER, AND A THIRD LAYER OF ETCHIBEL MATERIAL ON SAID SECOND LAYER, SAID THIRD LAYER BEING ETCHIBLE AT A SLOWER RATE THAN SAID SECOND LAYER, PORTIONS OF SAID SECOND AND THIRD LAYER BEING REMOVED IN A PREDETERMINED PATTERN TO PROVIDE SPACED PEDESTALS ON SAID FIRST LAYER, AND DEPOSITS OF TENEBRESCENT MATERIAL ON THE EXPOSED OUTER SURFACES OF THE PEDESTALS AND ON THE FIRST LAYER BETWEEN PEDESTALS, MEANS FOR CAUSING THE ELECTRON BEAM TO TRANSVERSELY SCAN THE SCROLL ADJACENT ONE END OF THE STRUCTURE TO PRODUCE AN IMAGE THEREON CORRESPONDING TO AN ELECTRICAL SIGNAL APPLIED TO THE ELECTRON GUN, MEANS FOR MOVING THE BELT TO MOVE THE IMAGE FROM THE SCANNED END OF THE TARGET STRUCTURE TO THE OPPOSITE END THEREOF, AND MEANS FOR ERASING THE IMAGE ON THE SCROLL AT A POINT REMOTE FROM THE SCANNED END OF THE TARGET STRUCTURE.

Claim 4

A DISPLAY TUBE COMPRISING A VACUMMIZED ENVELOPE, AND ELECTRON GUN IN THE ENVELOPE FOR PRODUCING A BEAM OF ELECTRONS, A TARGET STRUCTURE IN THE ENVELOPE COMPRISING AN ENDLESS BELT HAVING A SCROLL THEREON OF ELECTRON-SENSITIVE MATERIAL DISPOSED IN THE PATH OF THE ELECTRON BEAM, SAID SCROLL COMPRISING A FIRST LAYER OF CHEMICALLY RESISTANT MATERIAL, A SECOND LAYER OF ETCHIBEL MATERIAL DISPOSED ON SAID FIRST LAYER, AND A THIRD LAYER OF ETCHIBEL MATERIAL ON SAID SECOND LAYER, SAID THIRD LAYER BEING ETCHIBLE AT A SLOWER RATE THAN SAID SECOND LAYER, PORTIONS OF SAID SECOND AND THIRD LAYER BEING REMOVED IN A PREDETERMINED PATTERN TO PROVIDE SPACED PEDESTALS ON SAID FIRST LAYER, AND DEPOSITS OF TENEBRESCENT MATERIAL ON THE EXPOSED OUTER SURFACES OF THE PEDESTALS AND ON THE FIRST LAYER BETWEEN PEDESTALS, MEANS FOR CAUSING THE ELECTRON BEAM TO TRANSVERSELY SCAN THE SCROLL ADJACENT ONE END OF THE STRUCTURE TO PRODUCE AN IMAGE THEREON CORRESPONDING TO AN ELECTRICAL SIGNAL APPLIED TO THE ELECTRON GUN, MEANS FOR MOVING THE BELT TO MOVE THE IMAGE FROM THE SCANNED END OF THE TARGET STRUCTURE TO THE OPPOSITE END THEREOF, AND MEANS FOR ERASING THE IMAGE ON THE SCROLL AT A POINT REMOTE FROM THE SCANNED END OF THE TARGET STRUCTURE.