NL64921C - - Google Patents

Info

Publication number
NL64921C
NL64921C NL64921DA NL64921C NL 64921 C NL64921 C NL 64921C NL 64921D A NL64921D A NL 64921DA NL 64921 C NL64921 C NL 64921C
Authority
NL
Netherlands
Application number
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.)
Publication of NL64921C publication Critical patent/NL64921C/xx

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Thermistors And Varistors (AREA)
  • Telephone Function (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
NL64921D 1942-10-24 NL64921C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463184A US2387269A (en) 1942-10-24 1942-10-24 Telephone system

Publications (1)

Publication Number Publication Date
NL64921C true NL64921C (en)

Family

ID=23839177

Family Applications (1)

Application Number Title Priority Date Filing Date
NL64921D NL64921C (en) 1942-10-24

Country Status (6)

Country Link
US (1) US2387269A (en)
BE (1) BE468046A (en)
ES (1) ES177484A1 (en)
FR (1) FR941331A (en)
GB (1) GB591495A (en)
NL (1) NL64921C (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518178A (en) * 1947-11-05 1950-08-08 Automatic Elect Lab Antisidetone and line balancing substation circuits for telephone systems
US2732436A (en) * 1947-12-22 1956-01-24 Frequency in cycles per second
US2568150A (en) * 1948-06-15 1951-09-18 Bell Telephone Labor Inc Balancing network for subscribers' telephone sets
US2604543A (en) * 1950-11-09 1952-07-22 Bell Telephone Labor Inc Equalizer circuit
NL82970C (en) * 1950-12-27
DE886766C (en) * 1951-03-03 1953-08-17 Normalzeit G M B H Device to prevent unauthorized eavesdropping on telephone conversations
BE510745A (en) * 1951-04-18
DE1039104B (en) * 1951-04-18 1958-09-18 Int Standard Electric Corp Circuit arrangement for telephone stations to prevent overhearing one's own speech
DE1038118B (en) * 1951-04-26 1958-09-04 Int Standard Electric Corp Circuit arrangement for telephone stations to prevent overhearing one's own speech and room noise
BE539848A (en) * 1954-07-16
US3119063A (en) * 1961-01-13 1964-01-21 Gen Dynamics Corp Transmission line terminating impedance distinguishing circuit
DE1928434A1 (en) * 1969-06-04 1970-12-10 Siemens Ag Circuit arrangement for connecting direct current data transmission systems with low transmission voltage to a data exchange
NL7805416A (en) * 1978-05-19 1979-11-21 Philips Nv SELF-ADJUSTING FORK GEARS.
US6146056A (en) * 1998-01-14 2000-11-14 Jennmar Corporation Channel and bearing plate assembly

Also Published As

Publication number Publication date
BE468046A (en)
GB591495A (en) 1947-08-20
FR941331A (en) 1949-01-07
ES177484A1 (en) 1947-05-01
US2387269A (en) 1945-10-23

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