CH232789A - Device for signaling current transmission installations. - Google Patents

Device for signaling current transmission installations.

Info

Publication number
CH232789A
CH232789A CH232789DA CH232789A CH 232789 A CH232789 A CH 232789A CH 232789D A CH232789D A CH 232789DA CH 232789 A CH232789 A CH 232789A
Authority
CH
Switzerland
Prior art keywords
current transmission
signaling current
transmission installations
installations
signaling
Prior art date
Application number
Other languages
French (fr)
Inventor
Bell Telephone Manufac Anonyme
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of CH232789A publication Critical patent/CH232789A/en

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
CH232789D 1937-03-25 1938-03-25 Device for signaling current transmission installations. CH232789A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB232789X 1937-03-25

Publications (1)

Publication Number Publication Date
CH232789A true CH232789A (en) 1944-06-15

Family

ID=10193083

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232789D CH232789A (en) 1937-03-25 1938-03-25 Device for signaling current transmission installations.

Country Status (3)

Country Link
CH (1) CH232789A (en)
FR (1) FR835652A (en)
GB (2) GB496265A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468552A (en) * 1944-04-28 1949-04-26 Automatic Elect Lab Voice operated control circuit for two-way signal transmission systems

Also Published As

Publication number Publication date
FR835652A (en) 1938-12-28
GB494418A (en) 1938-10-25
GB496265A (en) 1938-11-25

Similar Documents

Publication Publication Date Title
FR783070A (en) Signaling device
FR763690A (en) Signaling device for automobiles
CH295544A (en) Automatic transmitter device for facsimile telegraph installation.
FR770019A (en) Signaling device for vehicles
FR813767A (en) Trawl signaling device
CH232789A (en) Device for signaling current transmission installations.
FR820619A (en) Device for signaling electric wires
FR833542A (en) Automatic switch, especially for light signaling devices
FR832795A (en) Receiving amplifier combined with a signaling device for telephone transmissions
FR856228A (en) Connection device for automatic teletype transmission systems
FR799384A (en) Coupling device for telegraph installations
FR799385A (en) Advanced coupling device for telegraph installations
FR756852A (en) Connection device for telephone systems
FR779357A (en) Adjustment device for electrical installations, in particular for signaling
FR827429A (en) Signaling device for automobiles
FR46110E (en) Signaling device for railways
CH236317A (en) Repeater circuit for telecommunications installations.
FR713666A (en) Signaling device for automatic telephone installation
FR817756A (en) Switching device for telegraph installations
FR776273A (en) Signaling device
CH196103A (en) Pedestrian signaling device.
FR833455A (en) Light signaling device for overhead power lines
FR725250A (en) Coupling arrangement for telephone systems
FR768965A (en) Coupling arrangement for telephone systems
FR788287A (en) Signaling device for vehicles