GB689947A - Improvements in or relating to the manufacture of flat grids for high frequency electric discharge tubes - Google Patents
Improvements in or relating to the manufacture of flat grids for high frequency electric discharge tubesInfo
- Publication number
- GB689947A GB689947A GB13902/51A GB1390251A GB689947A GB 689947 A GB689947 A GB 689947A GB 13902/51 A GB13902/51 A GB 13902/51A GB 1390251 A GB1390251 A GB 1390251A GB 689947 A GB689947 A GB 689947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grids
- former
- wire
- winding
- frames
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/0022—Manufacture
- H01J2893/0024—Planar grids
Landscapes
- Microwave Tubes (AREA)
Abstract
689,947. Making grids for thermionic valves. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 12, 1951 [June 15, 1950], No. 13902/51. Classes 83 (ii) and 83 (iv). [Also in Group XL (a)] In winding a flat grid for an electron discharge tube, two bevelled frames 1 and 4 are placed backto-back to constitute a former, and the wire 2 wound on; the wire is then soldered to the frames and the portions 6 cut away, leaving two flat grids. Because of the bevelled frame edges 3, 5, the part of the wires between the planar grid portions bear on sharp edges only, instead of a continuous thickness; this reduces the possibility of slight irregularities in the diameter of very fine wires causing the wire to tilt as it passes across the side of the former, and so produce divergencies in pitch. In Fig. 6, the grid frames 9 and 10 are separate from the winding former 8, and may be slid into grooves therein and clamped in position, before or after winding the grids. The former may be of triangular or polygonal section, enabling three or more grids to be wound at once, Figs. 8 and 9 (not shown). The technique is suitable for wire of less than 25Á diameter, with a winding pitch of less than 50 Á.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL689947X | 1950-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB689947A true GB689947A (en) | 1953-04-08 |
Family
ID=19805777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13902/51A Expired GB689947A (en) | 1950-06-15 | 1951-06-12 | Improvements in or relating to the manufacture of flat grids for high frequency electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB689947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2591343A (en) * | 2018-05-31 | 2021-07-28 | Micromass Ltd | Bench-top time of flight mass spectrometer |
-
1951
- 1951-06-12 GB GB13902/51A patent/GB689947A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2591343A (en) * | 2018-05-31 | 2021-07-28 | Micromass Ltd | Bench-top time of flight mass spectrometer |
| GB2591343B (en) * | 2018-05-31 | 2023-01-04 | Micromass Ltd | Bench-top time of flight mass spectrometer |
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