FR885987A - Telephone or similar systems - Google Patents

Telephone or similar systems

Info

Publication number
FR885987A
FR885987A FR885987DA FR885987A FR 885987 A FR885987 A FR 885987A FR 885987D A FR885987D A FR 885987DA FR 885987 A FR885987 A FR 885987A
Authority
FR
France
Prior art keywords
telephone
similar systems
systems
similar
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR885987A publication Critical patent/FR885987A/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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/542—Replacing by standby devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
FR885987D 1941-10-20 1942-09-18 Telephone or similar systems Expired FR885987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL233043X 1941-10-20

Publications (1)

Publication Number Publication Date
FR885987A true FR885987A (en) 1943-09-30

Family

ID=19780091

Family Applications (1)

Application Number Title Priority Date Filing Date
FR885987D Expired FR885987A (en) 1941-10-20 1942-09-18 Telephone or similar systems

Country Status (4)

Country Link
BE (1) BE447592A (en)
CH (1) CH233043A (en)
FR (1) FR885987A (en)
NL (1) NL56691C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE510734A (en) * 1951-04-19
DE921482C (en) * 1951-09-19 1954-12-20 Rudolf Sigerist Boiler for collective heating systems with a device for reducing the size of the furnace
NL205828A (en) * 1955-05-07
DE1035223B (en) * 1956-03-17 1958-07-31 Pintsch Electro Gmbh Arrangement for automatic switching to a reserve device in the case of radio connections
BE609595A (en) * 1960-10-26

Also Published As

Publication number Publication date
NL56691C (en)
BE447592A (en)
CH233043A (en) 1944-06-30

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