ES176816A1 - ENVIRONMENTAL OR RELATIVE IMPROVEMENTS OF CATHEDRAL STRUCTURES OF INDIREDCTO FOR ELECTRONIC DISCHARGE DEVICES - Google Patents

ENVIRONMENTAL OR RELATIVE IMPROVEMENTS OF CATHEDRAL STRUCTURES OF INDIREDCTO FOR ELECTRONIC DISCHARGE DEVICES

Info

Publication number: ES176816A1
Authority: ES; Spain
Prior art keywords: indiredcto; cathedral; environmental; structures; discharge devices
Prior art date: 1939-09-08
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

ES176816A

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nokia Spain SA

Original Assignee

Alcatel Espana SA

Standard Electrica SA

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1939-09-08

Filing date

1947-02-15

Publication date

1947-03-16

1947-02-15 Application filed by Alcatel Espana SA, Standard Electrica SA filed Critical Alcatel Espana SA

1947-03-16 Publication of ES176816A1 publication Critical patent/ES176816A1/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/22—Heaters

ES176816A 1939-09-08 1947-02-15 ENVIRONMENTAL OR RELATIVE IMPROVEMENTS OF CATHEDRAL STRUCTURES OF INDIREDCTO FOR ELECTRONIC DISCHARGE DEVICES Expired ES176816A1 (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB2542639A GB534575A (en)	1939-09-08	1939-09-08	Improvements in or relating to indirectly heated cathode structures for electron discharge devices

Publications (1)

Publication Number	Publication Date
ES176816A1 true ES176816A1 (en)	1947-03-16

Family

ID=10227468

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ES176816A Expired ES176816A1 (en)	1939-09-08	1947-02-15	ENVIRONMENTAL OR RELATIVE IMPROVEMENTS OF CATHEDRAL STRUCTURES OF INDIREDCTO FOR ELECTRONIC DISCHARGE DEVICES

Country Status (4)

Country	Link
BE (1)	BE467619A (en)
ES (1)	ES176816A1 (en)
FR (1)	FR943721A (en)
GB (1)	GB534575A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2147732B (en) *	1983-10-07	1987-11-04	English Electric Valve Co Ltd	Improvements in or relating to travelling wave tubes

0
- BE BE467619D patent/BE467619A/xx unknown
1939
- 1939-09-08 GB GB2542639A patent/GB534575A/en not_active Expired
1946
- 1946-12-27 FR FR943721D patent/FR943721A/en not_active Expired
1947
- 1947-02-15 ES ES176816A patent/ES176816A1/en not_active Expired

Also Published As

Publication number	Publication date
BE467619A (en)
FR943721A (en)	1949-03-16
GB534575A (en)	1941-03-11

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