Method of manufacturing electron tubes
阅读：288发布：2020-11-26
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1. A METHOD OF MANUFACTURING AN ELECTRON DISCHARGE TUBE HAVING A PHOTO-SENSITIVE LAYER IN A VACUUM SPACE, IN WHICH THE TUBE HAS PARTS WHICH ARE DEGASSED AT A HIGH TEMPERATURE, TWO PARTS OF THE TUBE ENVELOPE TO BE JOINED BEING HELD AT A GIVEN DISTANCE FROM EACH OTHER, A PHOTOSENSITIVE LAYER BEING PROVIDED AND THE ENVELOPE PARTS CONCERNED BEING UNITED TO FORM A SEALED TUBE BY COLD PRESSING, WHILE THE VACUUM OF THE VACUUM SPACE IS OBVIATED AND THE READY TUBE IS REMOVED AFTERWARDS, CHARACTERIZED IN THAT ONE OF THE TWO ENVELOPE PARTS IS PROVIDED WITH AN UNINTERRUPTED RIM, THE UPWARDLY ORIENTATED SIDE OF WHICH IS PROVIDED WITH A GROOVE, WHEREAS THE OTHER PART HAS A CORRESPONDING RIM THE DOWNWARDLY ORIENTATED SIDE OF WHICH HAS A PROFILE SUITABLE FOR CO-OPERATION WITH THE FIRST-MENTIONED RIM, WHILE THE VARIOUS TUBE PARTS ARE DEGASSED, WHEN THE TUBE PARTS ARE REMOTE FROM EACH OTHER, A MASS INTRODUCED INTO SAID GROOVE CONSISTING OF SOFT MATERIAL IS MELTED, AFTER WHICH THE PARTS ARE MOVED TOWARDS EACH OTHER AND AWAY FROM EACH OTHER SO THAT THE DOWNWARDLY ORIENTATED RIM OF ONE OF THE TUBE PARTS IS WETTED BY DIPPING IN THE BATH OF MOLTEN SOFT MATERIAL IN THE GROOVE OF THE OTHER PART, THE PARTS BEING THEN COOLED AND THE PHOTO-SENSITIVE LAYER BEING PROVIDED BETWEEN THE TWO PART OF THE TUBE ENVELOPE AND FINALLY THE TUBE BEING SEALED BY PRESSING THE TWO ENVELOPE PART PROVIDED THE THEIR RIMS WITH A LAYER OF SOFT MATERIAL ONE AGAINST THE OTHER IN THE COLD STATE.
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