Post deflection accelerated tube

Claim 1

A POST-DEFLECTION ACCELERATOR CATHODE RAY TUBE INCORPORATING AN ELECTRICALLY-CONDUCTING TARGET SCREEN WITH A SINGLE ELECTRICALLY CONDUCTING MESH ELECTRODE EXTENDING ACROSS THE PATH OF THE ELECTRON BEAM IN THE VICINITY OF AND SUBSTANTIALLY PARALLEL TO THE TARGET SCREEN, WHEREIN THE SURFACE OF THE MESH ELECTRODE REMOTE FROM THE SCREEN IS COATED WITH A LAYER OF DIELECTRIC MATERIAL HAVING HIGH SECONDARY ELECTRON EMISSION PROPERTIES FOR CAUSING THE LAYER TO BE CHARGED POSITIVELY WITH RESPECT TO THE MESH ELECTRODE IN NORMAL USE OF THE TUBE, AND THE TUBE INCLUDES AN OPEN-ENDED HOLLOW CONDUCTING SHIELD MEMBER LOCATED ON THE SIDE OF THE MESH ELECTRODE REMOTE FROM THE SCREEN AND THROUGH WHICH THE ELECTRON BEAM IS ARRANGED TO PASS SUBSEQUENT TO ITS PASSAGE PAST THE DEFLECTING MEANS, THE SHIELD MEMBER BEING OF APPRECIABLE AXIAL LENGTH AND BEING DISPOSED WITH ONE END ADACENT TO BUT INSULATED FROM THE MESH ELECTRODE, AND THE MESH ELECTRODE EXTENDING RADIALLY OUTWARDS BEYOND THE ADJACENT END OF THE SHIELD MEMBER AROUND THE WHOLE OF ITS PERIPHERY.