GB1294604A - Improvements in or relating to evacuated electron discharge tubes - Google Patents
Improvements in or relating to evacuated electron discharge tubesInfo
- Publication number
- GB1294604A GB1294604A GB23619/70D GB2361970D GB1294604A GB 1294604 A GB1294604 A GB 1294604A GB 23619/70 D GB23619/70 D GB 23619/70D GB 2361970 D GB2361970 D GB 2361970D GB 1294604 A GB1294604 A GB 1294604A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin
- anode
- electron discharge
- supporting
- tube
- 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
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
- H01J7/186—Getter supports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
- H01J41/18—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of cold cathodes
- H01J41/20—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of cold cathodes using gettering substances
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
1294604 Ion pumps ENGLISH ELECTRIC VALVE CO Ltd 19 April 1971 [15 May 1970] 23619/70 Heading H1D An evacuated electron discharge tube apparatus comprises an electron discharge tube and an ion getter pumping device including a body 3 of radio-active material arranged to act as a source of power therefor, said device being either within a vacuum tight housing constituted by the envelope of the tube or within a vacuum tight housing which includes the tube envelope, an envelope for said device and a communication channel between them. The pumping device comprises a glass support 1 through which are sealed pins 7 supporting a cathode 2, a pin 8 supporting a backing plate 4 for the body 3, and a pin 9 supporting a particle receiver 5, anode 6, end a sputter shield 10. One pin 7 is connected directly to pin 8 which is connected to pin 9 through a resistor 11 e.g. of 10<SP>11</SP> ohms. At least the inner surface of cathode 2 is made of getter material, e.g. Ta or Zr or, preferably, Ti. The receiver 5 and anode 6 are also made of getter material. The plate 4 may be of Al and the shield 10 of Mo. The body 3 is preferably an α-particle emitter, e.g. Po 210 , Cm 242 or Am 241 , and may be shielded by thin steel plates (not shown), to reduce the X-ray count. Alternatively the radio-active material may be a #-emitter, e.g. H 3 absorbed in Ta, in which case the parts 5 and 3 must be interchanged. The pump combines three effects-chemical pumping by the getter material and collection of ions produced by the radio-active material and by electrons produced as a result of this ionization. An alternative embodiment (Figs. 3 and 4, not shown) comprises a glass base supporting a coaxial arrangement of an anode surrounded by two grids and a cylinder with an internal film of α-emitting material and two end shields. The inner grid collects ions and the outer grid collects α particles. The film may alternatively be of #-emitting material, in which case only one grid is necessary. In either arrangement electrons orbit around the central anode. The electron discharge tube may be a high power microwave tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2361972A GB1313829A (en) | 1969-09-18 | 1970-05-15 | Transistors and aproduction thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1294604A true GB1294604A (en) | 1972-11-01 |
Family
ID=10198589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23619/70D Expired GB1294604A (en) | 1970-05-15 | 1970-05-15 | Improvements in or relating to evacuated electron discharge tubes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3786296A (en) |
| DE (1) | DE2124167B2 (en) |
| FR (1) | FR2091704A5 (en) |
| GB (1) | GB1294604A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338938A (en) * | 1993-04-09 | 1994-08-16 | Martin Marietta Energy Systems, Inc. | Gamma radiation field intensity meter |
| ITMI20012389A1 (en) * | 2001-11-12 | 2003-05-12 | Getters Spa | CABLE CATHODE WITH INTEGRATED GETTER FOR DISCHARGE LAMPS AND METHODS FOR ITS REALIZATION |
| JP4475646B2 (en) * | 2004-08-27 | 2010-06-09 | キヤノン株式会社 | Image display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2715993A (en) * | 1952-06-06 | 1955-08-23 | W M Welch Mfg Company | Ionization pump |
-
1970
- 1970-05-15 GB GB23619/70D patent/GB1294604A/en not_active Expired
-
1971
- 1971-05-13 US US00142943A patent/US3786296A/en not_active Expired - Lifetime
- 1971-05-14 DE DE19712124167 patent/DE2124167B2/en active Pending
- 1971-05-17 FR FR7117820A patent/FR2091704A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3786296A (en) | 1974-01-15 |
| DE2124167B2 (en) | 1973-07-26 |
| FR2091704A5 (en) | 1972-01-14 |
| DE2124167A1 (en) | 1971-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3051868A (en) | Ionization vacuum gauges | |
| GB642083A (en) | Improvements relating to cathode ray tubes | |
| US3088657A (en) | Glow discharge vacuum pump apparatus | |
| US2988657A (en) | Ion pump | |
| GB1294604A (en) | Improvements in or relating to evacuated electron discharge tubes | |
| GB484900A (en) | Improvements in or relating to electric discharge tubes | |
| US3018944A (en) | Electrical vacuum pump apparatus | |
| US3319875A (en) | Ion vacuum pumps | |
| GB1209026A (en) | Improvements in or relating to cold cathode, glow discharge device | |
| GB1336126A (en) | Ion gauges | |
| US3070719A (en) | Cathodes for magnentically-confined glow discharge apparatus | |
| US3231175A (en) | Electrical vacuum pump | |
| US3117247A (en) | Vacuum pump | |
| US3631280A (en) | Ionic vacuum pump incorporating an ion trap | |
| GB1105726A (en) | Ionisation vacuum pump | |
| US3465189A (en) | Ionization vacuum gauge with x-ray shielding and ion reflecting means | |
| GB1247501A (en) | Ion-getter vacuum pump | |
| US3244933A (en) | Device of the kind comprising a highpower klystron with getter ion pump connected thereto | |
| GB820736A (en) | Method of and apparatus for electron multiplication | |
| US3495127A (en) | Ultra-high vacuum magnetron ionization gauge with ion-collector shield | |
| GB897599A (en) | Improvements in or relating to ion pumps | |
| US2462813A (en) | Getter structure | |
| GB695406A (en) | Improvements in or relating to electric discharge tubes for intensifying fluorescentimages produced with the use of x-rays | |
| GB889947A (en) | Ionization gauge for the measurement of low pressures | |
| GB1053215A (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |