FR672141A - Locking device for electrical signaling systems - Google Patents

Locking device for electrical signaling systems

Info

Publication number
FR672141A
FR672141A FR672141DA FR672141A FR 672141 A FR672141 A FR 672141A FR 672141D A FR672141D A FR 672141DA FR 672141 A FR672141 A FR 672141A
Authority
FR
France
Prior art keywords
locking device
signaling systems
electrical signaling
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR672141A publication Critical patent/FR672141A/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
FR672141D 1928-03-31 1929-03-27 Locking device for electrical signaling systems Expired FR672141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE308816X 1928-03-31

Publications (1)

Publication Number Publication Date
FR672141A true FR672141A (en) 1929-12-23

Family

ID=20307588

Family Applications (1)

Application Number Title Priority Date Filing Date
FR672141D Expired FR672141A (en) 1928-03-31 1929-03-27 Locking device for electrical signaling systems

Country Status (7)

Country Link
US (1) US1958167A (en)
AT (1) AT116983B (en)
BE (1) BE359396A (en)
DE (2) DE495106C (en)
FR (1) FR672141A (en)
GB (1) GB308816A (en)
NL (1) NL30423C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755785C (en) * 1933-03-16 1952-03-31 Marconi Wireless Telegraph Co Arrangement for the automatic activation of a transmitter with the help of rectified modulation oscillations

Also Published As

Publication number Publication date
NL30423C (en)
BE359396A (en) 1929-04-30
US1958167A (en) 1934-05-08
DE495106C (en) 1930-04-03
GB308816A (en) 1930-06-12
AT116983B (en) 1930-03-25
DE593628C (en) 1934-03-02

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