GB285044A - Improvements in shielding systems for electric discharge devices - Google Patents
Improvements in shielding systems for electric discharge devicesInfo
- Publication number
- GB285044A GB285044A GB4131/28A GB413128A GB285044A GB 285044 A GB285044 A GB 285044A GB 4131/28 A GB4131/28 A GB 4131/28A GB 413128 A GB413128 A GB 413128A GB 285044 A GB285044 A GB 285044A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- casing
- valve
- screening
- partitions
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Safety Valves (AREA)
Abstract
285,044. British Thomson-Houston Co., Ltd., (Assignees of Thompson, H. C.). Feb. 9, 1927, [Convention date]. Vacuum tubes.-A screening arrangement for preventing accidental couplings in thermionic valve amplifiers &c., comprises a casing divided into compartments by one or more screening partitions, which are provided with gaps or openings, adapted to be closed by placing screening covers over the valves. Fig. 2 is a plan view of a set, and Fig. 3 a vertical cross-section. The partitions 6, 7 in the casing 3 are provided with rectangular gaps, the edges 31 of which are turned back to provide vertical slideways for the covers 27 when these are slid into position over the valves 4, 5. The valves are of the screen-grid type having an additional terminal 29 at the opposite end of the valve to the usual four terminals. The input connections for the control grid 24 comprise the pin 29, a spring contact 25 carried by the cover 27 and a contact 30 fixed to the casing 3. The input connections are thus entirely in the compartment 8, and are completed by the act of placing the cover over the valve. The battery and output connections pass through the opening into the next compartment 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US167020A US1659542A (en) | 1927-02-09 | 1927-02-09 | Shielding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB285044A true GB285044A (en) | 1928-05-17 |
Family
ID=22605612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4131/28A Expired GB285044A (en) | 1927-02-09 | 1928-02-09 | Improvements in shielding systems for electric discharge devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1659542A (en) |
| BE (1) | BE348688A (en) |
| GB (1) | GB285044A (en) |
| NL (1) | NL25402C (en) |
-
0
- BE BE348688D patent/BE348688A/xx unknown
- NL NL25402D patent/NL25402C/xx active
-
1927
- 1927-02-09 US US167020A patent/US1659542A/en not_active Expired - Lifetime
-
1928
- 1928-02-09 GB GB4131/28A patent/GB285044A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE348688A (en) | |
| US1659542A (en) | 1928-02-14 |
| NL25402C (en) |
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