GB312336A - Improvement in protective circuit for vacuum tubes - Google Patents
Improvement in protective circuit for vacuum tubesInfo
- Publication number
- GB312336A GB312336A GB4935/29A GB493529A GB312336A GB 312336 A GB312336 A GB 312336A GB 4935/29 A GB4935/29 A GB 4935/29A GB 493529 A GB493529 A GB 493529A GB 312336 A GB312336 A GB 312336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relays
- source
- filament
- amplifiers
- relay
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
- H03F1/548—Protection of anode or grid circuit against overload
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Particle Accelerators (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
312,336. Standard Telephones & Cables, Ltd., (Assignees of Schelleng, J. C.). May 26, 1928, [Convention date]. Thermionic amplifiers. - In a high-powered generating installation a protective switch in the plate supply is opened by a relatively inexpensive relay located in the low-voltage filament circuit, and a visual indication is simultaneously given of any particular amplifier which is being over-run. The drawing shows two amplifiers 1, 2 fed in push-pull from a high-frequency source 5. Grid bias is supplied from a source 21 through parallel resistances 22, 23 and filter circuits 24. The safeguarding relays 60, 61 are inserted in the filament-supply circuit fed from a source 16, the windings of the relays being so arranged that they are insensitive to changes in the actual filament current, through any excess in the normal plate current (which flows through the windings in parallel) breaks one or other of the contacts 43, 43<1> and so opens a circuit-breaker 33 on the primary side of a transformer 66 feeding the rectifier 30 which supplies high-tension to the plates of the amplifiers 1, 2. The holding-relay for the circuitbreaker 33 is normally energized from a source 34 through relays 35, 35<1>, which are in series with -the filament relays 60, 61, and are therefore operated when any dangerous increase in plate current takes place. As one or other of the relays 35, 35<1> falls, it energizes a lamp 51, 51<1> to indicate the particular amplifier at fault. The relays 35, 35' are re-set through a push-button 37, source 36, and relay 38.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US280666A US1816913A (en) | 1928-05-26 | 1928-05-26 | Protective circuit for vacuum tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB312336A true GB312336A (en) | 1930-05-14 |
Family
ID=23074068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4935/29A Expired GB312336A (en) | 1928-05-26 | 1929-02-14 | Improvement in protective circuit for vacuum tubes |
Country Status (3)
Country | Link |
---|---|
US (1) | US1816913A (en) |
FR (1) | FR671564A (en) |
GB (1) | GB312336A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733338A (en) * | 1956-01-31 | Electronic protective circuits | ||
US2656487A (en) * | 1950-06-29 | 1953-10-20 | Bell Telephone Labor Inc | Voltage supply control circuit |
US2742595A (en) * | 1952-12-08 | 1956-04-17 | Burroughs Corp | Control circuits |
-
1928
- 1928-05-26 US US280666A patent/US1816913A/en not_active Expired - Lifetime
-
1929
- 1929-02-14 GB GB4935/29A patent/GB312336A/en not_active Expired
- 1929-03-16 FR FR671564D patent/FR671564A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR671564A (en) | 1929-12-14 |
US1816913A (en) | 1931-08-04 |
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