GB908487A - Improvements relating to vacuum getter pumps - Google Patents
Improvements relating to vacuum getter pumpsInfo
- Publication number
- GB908487A GB908487A GB2838859A GB2838859A GB908487A GB 908487 A GB908487 A GB 908487A GB 2838859 A GB2838859 A GB 2838859A GB 2838859 A GB2838859 A GB 2838859A GB 908487 A GB908487 A GB 908487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- discharge
- anode
- electrode
- gettering material
- 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
- 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
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
908,487. Discharge apparatus. BRITISH ELECTRICAL & ALLIED INDUSTRIES RESEARCH ASSOCIATION. Nov. 17, 1960 [Aug. 19, 1959], No. 28388/59. Class 39 (1). In a getter pump an envelope having an inlet houses two co-operating electrodes 3, 8, Fig. 1, one, 3, of which is of gettering material and a third electrode 15. The initial discharge between cathode 3 and initiator electrode 8 is a pulse produced by opening a gap between electrodes 3, 8 by an electric motor-driven mechanism operating through bellows 20 and closing it again at the end of the pulse or by pulses from a car ignition coil, Fig. 2 (not shown), with a gap of adjustable length. The discharge between Ni gauze anode 15 and cathode 3 is also pulsed being obtained by the discharge of a capacitor 23 through a focusing coil 17 and the anode 15 in series. The cathode is made of gettering material such as Ti, Zr, Mg or Ca and has a hemispherical upper end 4, the arc initially from the end face of 4 being transferred to the side faces of 3. Some getter material is given off from the cathode and forms a layer on anode 15 and on the tube wall to serve as the active ion trapping layer. Mild steel discs shield the top and bottom of the envelope from gettering material. In either embodiment the cathode 3 may be movable instead of initiator electrode 8. The capacitor 23 may be replaced by a battery and switch. The magnetic means may be permanent or electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2838859A GB908487A (en) | 1959-12-19 | 1959-12-19 | Improvements relating to vacuum getter pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2838859A GB908487A (en) | 1959-12-19 | 1959-12-19 | Improvements relating to vacuum getter pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB908487A true GB908487A (en) | 1962-10-17 |
Family
ID=10274843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2838859A Expired GB908487A (en) | 1959-12-19 | 1959-12-19 | Improvements relating to vacuum getter pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB908487A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3310226A (en) * | 1965-02-11 | 1967-03-21 | Nat Res Corp | Vacuum device |
-
1959
- 1959-12-19 GB GB2838859A patent/GB908487A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3310226A (en) * | 1965-02-11 | 1967-03-21 | Nat Res Corp | Vacuum device |
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