GB542252A - Improvements in two-way transmission systems - Google Patents

Improvements in two-way transmission systems

Info

Publication number
GB542252A
GB542252A GB12374/40A GB1237440A GB542252A GB 542252 A GB542252 A GB 542252A GB 12374/40 A GB12374/40 A GB 12374/40A GB 1237440 A GB1237440 A GB 1237440A GB 542252 A GB542252 A GB 542252A
Authority
GB
United Kingdom
Prior art keywords
tube
amplifier
gas
speech
filled
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
GB12374/40A
Other languages
English (en)
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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 Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Publication of GB542252A publication Critical patent/GB542252A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
GB12374/40A 1939-08-14 1940-07-31 Improvements in two-way transmission systems Expired GB542252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US290090A US2282405A (en) 1939-08-14 1939-08-14 Transmission system

Publications (1)

Publication Number Publication Date
GB542252A true GB542252A (en) 1942-01-01

Family

ID=23114493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12374/40A Expired GB542252A (en) 1939-08-14 1940-07-31 Improvements in two-way transmission systems

Country Status (4)

Country Link
US (3) US2282405A (enrdf_load_html_response)
BE (1) BE464853A (enrdf_load_html_response)
FR (1) FR930594A (enrdf_load_html_response)
GB (1) GB542252A (enrdf_load_html_response)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428520A (en) * 1943-05-01 1947-10-07 Automatic Elect Lab Transmission system
CH251257A (de) * 1943-11-03 1947-10-15 Autophon Ag Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage.
US2477275A (en) * 1944-01-15 1949-07-26 Firm Autophon Ag Voice-controlled two-way communication system
US2487455A (en) * 1945-01-29 1949-11-08 Stromberg Carlson Co Telephone circuit
US2468553A (en) * 1945-03-17 1949-04-26 Automatic Elect Lab Voice operated control circuit
US2542921A (en) * 1945-07-02 1951-02-20 Automatic Elect Lab Signal operated control for twochannel transmission systems
US2515726A (en) * 1945-09-24 1950-07-18 Automatic Elect Lab Intercommunicating system
US2472211A (en) * 1945-12-13 1949-06-07 Automatic Elect Lab Antisinging gain controlled repeater
US2484691A (en) * 1946-02-14 1949-10-11 Western Electric Co Loud-speaking communication system
BE476344A (enrdf_load_html_response) * 1946-06-20
US2497779A (en) * 1946-10-09 1950-02-14 Northern Electric Co Four-wire transmission circuit thermistor control
US2568397A (en) * 1947-02-20 1951-09-18 Rca Corp Telephone terminal equipment
NL69785C (enrdf_load_html_response) * 1947-02-21
US2647172A (en) * 1948-06-11 1953-07-28 Le Teleampliphone Soc Electronic switch
GB703801A (en) * 1951-11-19 1954-02-10 Leonard Ernest Ryall Improvements in or relating to voice switching in telephone transmission systems
US3136864A (en) * 1959-10-05 1964-06-09 Automatic Elect Lab Loudspeaking telephone with electronic voice switching

Also Published As

Publication number Publication date
BE464853A (enrdf_load_html_response)
FR930594A (fr) 1948-01-29
US2371291A (en) 1945-03-13
US2282405A (en) 1942-05-12
USRE22897E (en) 1947-07-15

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