GB145777A - Improvements in and relating to electric amplifying devices such as thermionic valves - Google Patents

Improvements in and relating to electric amplifying devices such as thermionic valves

Info

Publication number
GB145777A
GB145777A GB18153/20A GB1815320A GB145777A GB 145777 A GB145777 A GB 145777A GB 18153/20 A GB18153/20 A GB 18153/20A GB 1815320 A GB1815320 A GB 1815320A GB 145777 A GB145777 A GB 145777A
Authority
GB
United Kingdom
Prior art keywords
battery
conductors
amplifiers
over
casings
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
GB18153/20A
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.)
Siemens and Halske AG
Original Assignee
Siemens and Halske AG
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 Siemens and Halske AG filed Critical Siemens and Halske AG
Publication of GB145777A publication Critical patent/GB145777A/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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • 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
    • 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)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

145,777. Siemens & Halske Akt.-Ges. Oct. 25, 1916, [Convention date]. Repeating and amplifying systems; thermionic relays.-In amplifying-devices having one or more amplifiers, the elements of the arrangement, through the mutual capacities of which self-excitation, speech distortion, and " whistling " may occur, are surrounded by metallic cases, which are electrically connected together and with a pole of each battery or the common battery of the device. In order to save in the number of metal casings used, if the working of the arrangement is not affected, conductors are connected to one pole of the local battery or to the system of casings, whereby they are converted into elements which do not require protection. In Fig. 2, the frames shown in thick lines represent the metallic casings in which the transformers P1 S1, P2 S2, P3,S3, and the conductors l1, l2, l3, l4 are enclosed. These cases are electrically connected together by conductors s1-s6, and are connected by means of a common conductor s7 to the negative pole of the heating- battery B, over the point R. The points O1 and O2 of the transformer coils P1 and S3 are connected to the battery B1 over the conductors a1 and a2 over the point R, which is earthed through the conductor a3. The protecting-means may be applied to amplifiers other than. thermionic, for instance microphone amplifiers, and is also a protection against any electric disturbances due to outside influences.
GB18153/20A 1916-07-07 1920-07-02 Improvements in and relating to electric amplifying devices such as thermionic valves Expired GB145777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE146353X 1916-07-07

Publications (1)

Publication Number Publication Date
GB145777A true GB145777A (en) 1921-04-21

Family

ID=5671314

Family Applications (2)

Application Number Title Priority Date Filing Date
GB18153/20A Expired GB145777A (en) 1916-07-07 1920-07-02 Improvements in and relating to electric amplifying devices such as thermionic valves
GB18313/20A Expired GB146353A (en) 1916-07-07 1920-07-02 Improvements in and relating to electric amplifiers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB18313/20A Expired GB146353A (en) 1916-07-07 1920-07-02 Improvements in and relating to electric amplifiers

Country Status (5)

Country Link
AT (1) AT87005B (en)
DE (3) DE300621C (en)
FR (1) FR517411A (en)
GB (2) GB145777A (en)
NL (1) NL12208C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438115A (en) * 1938-05-13 1948-03-23 Dodds John Mathieson Screening means for vacuum electric tube devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972012C (en) * 1937-04-13 1959-05-06 Siemens Ag Transmission system with shielded high-frequency transmission equipment
DE767483C (en) * 1937-04-29 1952-08-28 Siemens & Halske A G High frequency amplification system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438115A (en) * 1938-05-13 1948-03-23 Dodds John Mathieson Screening means for vacuum electric tube devices

Also Published As

Publication number Publication date
DE304307C (en) 1921-08-10
NL12208C (en) 1924-12-15
AT87005B (en) 1922-01-25
DE300621C (en) 1921-07-19
DE350581C (en) 1922-03-22
FR517411A (en) 1921-05-06
GB146353A (en) 1921-10-03

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