FR856864A - Electric discharge tube for optical indication of voltages - Google Patents
Electric discharge tube for optical indication of voltagesInfo
- Publication number
- FR856864A FR856864A FR856864DA FR856864A FR 856864 A FR856864 A FR 856864A FR 856864D A FR856864D A FR 856864DA FR 856864 A FR856864 A FR 856864A
- Authority
- FR
- France
- Prior art keywords
- voltages
- discharge tube
- electric discharge
- optical indication
- indication
- Prior art date
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/861—Vessels or containers characterised by the form or the structure thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/14—Magic-eye or analogous tuning indicators
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL210912X | 1938-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR856864A true FR856864A (en) | 1940-08-13 |
Family
ID=19778824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR856864D Expired FR856864A (en) | 1938-06-25 | 1939-06-24 | Electric discharge tube for optical indication of voltages |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE435059A (en) |
CH (1) | CH210912A (en) |
DE (1) | DE737997C (en) |
FR (1) | FR856864A (en) |
GB (1) | GB520623A (en) |
NL (1) | NL50271C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2406887A1 (en) * | 1977-10-19 | 1979-05-18 | Matsushita Electric Ind Co Ltd | CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2625612A (en) * | 1951-06-22 | 1953-01-13 | Joseph M Rheins | Telephone holder or support |
DE949187C (en) * | 1952-12-12 | 1956-09-13 | Siemens Ag | Electron tubes with luminescent screen, in particular tuning indicator tubes |
US3188512A (en) * | 1960-12-22 | 1965-06-08 | Welch Allyn Inc | Miniature lamp and method for making it |
-
0
- BE BE435059D patent/BE435059A/xx unknown
- NL NL50271D patent/NL50271C/xx active
-
1938
- 1938-07-02 DE DEN42180D patent/DE737997C/en not_active Expired
-
1939
- 1939-06-22 GB GB18267/39A patent/GB520623A/en not_active Expired
- 1939-06-24 CH CH210912D patent/CH210912A/en unknown
- 1939-06-24 FR FR856864D patent/FR856864A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2406887A1 (en) * | 1977-10-19 | 1979-05-18 | Matsushita Electric Ind Co Ltd | CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance |
Also Published As
Publication number | Publication date |
---|---|
GB520623A (en) | 1940-04-29 |
CH210912A (en) | 1940-08-15 |
NL50271C (en) | |
DE737997C (en) | 1943-07-30 |
BE435059A (en) |
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