FR731352A - Improvements made to means to ensure the protection of electrical installations, in particular those supplied with alternating current, and more especially telegraph and telephone installations - Google Patents

Improvements made to means to ensure the protection of electrical installations, in particular those supplied with alternating current, and more especially telegraph and telephone installations

Info

Publication number
FR731352A
FR731352A FR731352DA FR731352A FR 731352 A FR731352 A FR 731352A FR 731352D A FR731352D A FR 731352DA FR 731352 A FR731352 A FR 731352A
Authority
FR
France
Prior art keywords
installations
telegraph
ensure
protection
alternating current
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
Other languages
French (fr)
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.)
Association des Ouvriers en Instruments de Precision
Original Assignee
Association des Ouvriers en Instruments de Precision
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 Association des Ouvriers en Instruments de Precision filed Critical Association des Ouvriers en Instruments de Precision
Application granted granted Critical
Publication of FR731352A publication Critical patent/FR731352A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR731352D 1931-02-14 1932-02-13 Improvements made to means to ensure the protection of electrical installations, in particular those supplied with alternating current, and more especially telegraph and telephone installations Expired FR731352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE731352X 1931-02-14

Publications (1)

Publication Number Publication Date
FR731352A true FR731352A (en) 1932-09-02

Family

ID=3879176

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731352D Expired FR731352A (en) 1931-02-14 1932-02-13 Improvements made to means to ensure the protection of electrical installations, in particular those supplied with alternating current, and more especially telegraph and telephone installations

Country Status (1)

Country Link
FR (1) FR731352A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE913787C (en) * 1948-10-02 1954-06-21 Siemens Ag Circuit arrangement for telephone systems to prevent cracking noises in the telephone
FR2374793A1 (en) * 1976-12-20 1978-07-13 Philips Nv DEVICE FOR PROTECTING TELEPHONE LINES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE913787C (en) * 1948-10-02 1954-06-21 Siemens Ag Circuit arrangement for telephone systems to prevent cracking noises in the telephone
FR2374793A1 (en) * 1976-12-20 1978-07-13 Philips Nv DEVICE FOR PROTECTING TELEPHONE LINES

Similar Documents

Publication Publication Date Title
FR739551A (en) Improvements to electrical networks
FR721451A (en) Improvements to circuit breakers and particularly to fast acting circuit breakers for direct current
FR731352A (en) Improvements made to means to ensure the protection of electrical installations, in particular those supplied with alternating current, and more especially telegraph and telephone installations
FR734310A (en) Improvements to electric dynamos, more particularly applicable to generators for land and air vehicles
GB229766A (en) Improvements in telegraphic and telephonic cables
CA229432A (en) Telegraph and telephone pole
GB237978A (en) Improvements in the manufacture of telegraph and telephone cables
FR732043A (en) Improvements to equipment, devices and circuits generating alternating and periodic currents
ES115006A1 (en) IMPROVEMENTS IN THE MANUFACTURE OF TELEGRAPH AND TELEPHONE CABLES.
FR649541A (en) Improvements to electrical connection conductors, more particularly applicable to battery cells
CA294511A (en) Performance on short circuit of rotary converters and direct current dynamos
ES93130A1 (en) Improvements in the manufacture of cables and other telegraphic and telephone conductors.
ES122889A1 (en) Improvements in the electric current conductors.
AU1760028A (en) Improvements in and relating to electrical alternating current rectifiers
ES124345A1 (en) Procedure and equipment for the manipulation of electric current circuits by photoelectric cells.
GB237221A (en) An improved pole for carrying electric light cables, telegraph and telephone wires and for other purposes
CA296928A (en) Electrical alternating current rectifier
ES114640A1 (en) Improvements in the manufacturing procedures of telegraph and telephone cables.
FR717248A (en) Insulators for telegraph and telephone cables
FR568529A (en) Underground and overhead-underground telephone network with sub-distribution
GR3223B (en) INSULATOR AFTER SCREEN ATTACHMENT OF THE WIRE BY TELEPHONE, TELEGRAPHY LINE OR ELECTRICITY TRANSMISSION LINE AND FOR ALL OTHER USES.
GB507234A (en) Improvements in protection devices of electrical networks and the like
ES124518A1 (en) IMPROVEMENTS IN ELECTRICAL CABLES
CA282701A (en) Method of preventing current leaking in cables
FR39718E (en) Device for the protection of electrical installations, in particular high current installations