FR871202A - Electrical indication and control systems - Google Patents

Electrical indication and control systems

Info

Publication number
FR871202A
FR871202A FR871202DA FR871202A FR 871202 A FR871202 A FR 871202A FR 871202D A FR871202D A FR 871202DA FR 871202 A FR871202 A FR 871202A
Authority
FR
France
Prior art keywords
control systems
electrical indication
indication
electrical
systems
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 FR871202A publication Critical patent/FR871202A/en
Expired legal-status Critical Current

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/10—Providing fault- or trouble-signals
FR871202D 1939-11-28 1941-03-31 Electrical indication and control systems Expired FR871202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US306454A US2249931A (en) 1939-11-28 1939-11-28 Indicating and control circuits

Publications (1)

Publication Number Publication Date
FR871202A true FR871202A (en) 1942-04-13

Family

ID=23185362

Family Applications (1)

Application Number Title Priority Date Filing Date
FR871202D Expired FR871202A (en) 1939-11-28 1941-03-31 Electrical indication and control systems

Country Status (2)

Country Link
US (1) US2249931A (en)
FR (1) FR871202A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE485295A (en) * 1947-05-09

Also Published As

Publication number Publication date
US2249931A (en) 1941-07-22

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