GB400351A - A highly emissive cathode for cathode-ray tubes - Google Patents
A highly emissive cathode for cathode-ray tubesInfo
- Publication number
- GB400351A GB400351A GB18317/32A GB1831732A GB400351A GB 400351 A GB400351 A GB 400351A GB 18317/32 A GB18317/32 A GB 18317/32A GB 1831732 A GB1831732 A GB 1831732A GB 400351 A GB400351 A GB 400351A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- nickel
- pot
- june
- cap
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/60—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising pushing or pulling links attached to both parts
- F16D3/62—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising pushing or pulling links attached to both parts the links or their attachments being elastic
-
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
400,351. Thermionic cathodes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, and WIENECKE, B., 73, H÷nowerstrasse, Mahlsdorf, both in Berlin. June 29, 1932, No. 18317. Convention date, June 30, 1931. [Class 39 (i).] A pot-like shaped cathode 1 for cathode-ray tubes has a part of its outer surface covered with emissive material arranged in a recess in the body and is indirectly heated. In the form shown the cathode 1 contains a heater 3 surrounded by insulation 2. The emission material 4 is disposed, e.g. by smearing in a depression in the top of the cathode. A nickel cap 5 has an aperture a which limits the cross-section of the cathode beam, and may be 0À1 sq. mm. in area, or less. The distance of the cap from the emissive material is made small enough to prevent the formation of a space-charge in the intervening space and large enough to prevent dispersion of the beam, the preferred distance being about 0À1 mm. The cathode 1 may be conical externally and may consist of a ferro-magnetic material such as nickel or nickel or iron alloys. According to the Specification as open to inspection under Sect. 91 the cathode may be used in discharge tubes generally and the heating current may be passed directly through the pot-shaped cathode. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE400351X | 1908-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB400351A true GB400351A (en) | 1933-10-26 |
Family
ID=6399546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18317/32A Expired GB400351A (en) | 1931-06-30 | 1932-06-29 | A highly emissive cathode for cathode-ray tubes |
Country Status (2)
| Country | Link |
|---|---|
| FR (2) | FR400351A (en) |
| GB (1) | GB400351A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2892115A (en) * | 1955-12-20 | 1959-06-23 | Itt | Cathode structures |
-
1909
- 1909-03-04 FR FR400351D patent/FR400351A/en not_active Expired
-
1932
- 1932-06-29 FR FR739260D patent/FR739260A/en not_active Expired
- 1932-06-29 GB GB18317/32A patent/GB400351A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2892115A (en) * | 1955-12-20 | 1959-06-23 | Itt | Cathode structures |
Also Published As
| Publication number | Publication date |
|---|---|
| FR739260A (en) | 1933-01-09 |
| FR400351A (en) | 1909-07-26 |
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