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TALLERES MARTIN SL
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TALLERES MARTIN SL
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Priority to ES0201758ApriorityCriticalpatent/ES201758A1/es
Publication of ES201758A1publicationCriticalpatent/ES201758A1/es
Structures Of Non-Positive Displacement Pumps
(AREA)
Abstract
Tubo electrónico que tiene un cátodo cuya pared está por lo menos parcialmente constituída por una pieza porosa de un metal con elevado punto de fusión que forma una cámara que contiene una reserva de compuestos de metales alcalino-térreos caracterizado porque los poros de la superficie de la pieza no destinada a la emisión están obturados.
ES0201758A1952-02-051952-02-05UN PROCEDIMIENTO PERFECCIONADO DE FABRICACIoN DE BOMBAS CENTiFUGAS PARA ELEVACIoN DE FLuIDOS.
ExpiredES201758A1
(es)
Katode til elektriske udladningsrør med et jordalkaliforbindelser indeholdende, porøst legeme af tungtsmelteligt metal, og fremgangsmåder til dens fremstilling.
Arrangement for preventing the afterglow ofthe steady luminous spot afterthe switching-off of apparatus employing cathode-ray tubes, particularly television sets