GB520605A - Protective arrangement for thermionic valve apparatus - Google Patents

Protective arrangement for thermionic valve apparatus

Info

Publication number
GB520605A
GB520605A GB33184/38A GB3318438A GB520605A GB 520605 A GB520605 A GB 520605A GB 33184/38 A GB33184/38 A GB 33184/38A GB 3318438 A GB3318438 A GB 3318438A GB 520605 A GB520605 A GB 520605A
Authority
GB
United Kingdom
Prior art keywords
nov
relay
antenna
valve
resistance
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
Application number
GB33184/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB520605A publication Critical patent/GB520605A/en
Expired legal-status Critical Current

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)
  • Emergency Protection Circuit Devices (AREA)

Abstract

520,605. Protective cut - out systems. STANDARD TELEPHONES & CABLES, Ltd. Nov. 15, 1938, No. 33184. Convention date, Nov. 16, 1937. [Class 38 (v)] [Also in Group XL] The radio frequency source 1 of a transmitter is connected to the antenna 9 over an amplifier 3, transmission line 4, tuning coils 5, 6, and coupling and antenna condensers 7, 8. The cathode circuit of the valve 3 includes a gridbiasing resistance 11 and a resistance 12 which normally is short-circuited by contacts of a relay 13 having its coil connected between an earthconductor 10 and the inner conductor of line 4, preferably on the amplifier side, and in series with a battery 14 or L.F. alternating source. If, due to lightning or power-current overloading, a discharge to earth takes place from the part of the high-frequency system to which relay 13 is connected, the latter opens its contact to apply a blocking bias to the valve and prevent the transmission of power-current so long as the discharge lasts. A H.F. choke 15 and condenser 16 segregate the main and auxiliary currents, and a H.F. choke provides a conductive or L.F. connection shunting condenser 8.
GB33184/38A 1937-11-16 1938-11-15 Protective arrangement for thermionic valve apparatus Expired GB520605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US174778A US2158516A (en) 1937-11-16 1937-11-16 Protective device for electrical apparatus

Publications (1)

Publication Number Publication Date
GB520605A true GB520605A (en) 1940-04-29

Family

ID=22637486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33184/38A Expired GB520605A (en) 1937-11-16 1938-11-15 Protective arrangement for thermionic valve apparatus

Country Status (3)

Country Link
US (1) US2158516A (en)
FR (1) FR845999A (en)
GB (1) GB520605A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540638A (en) * 1946-05-22 1951-02-06 Rca Corp Automatic step control of current

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545298A (en) * 1946-03-13 1951-03-13 Mittelmann Eugene Rectifier
US2515561A (en) * 1948-06-21 1950-07-18 Frank M Lindley Communication mechanism
JPH05335844A (en) * 1992-06-04 1993-12-17 Aitel Corp High frequency amplifier device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540638A (en) * 1946-05-22 1951-02-06 Rca Corp Automatic step control of current

Also Published As

Publication number Publication date
US2158516A (en) 1939-05-16
FR845999A (en) 1939-09-06

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