FR907461A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR907461A
FR907461A FR907461DA FR907461A FR 907461 A FR907461 A FR 907461A FR 907461D A FR907461D A FR 907461DA FR 907461 A FR907461 A FR 907461A
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of FR907461A publication Critical patent/FR907461A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Separation By Low-Temperature Treatments (AREA)
FR907461D 1941-04-28 1942-04-28 Improvements to electrical signaling systems Expired FR907461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5514/41A GB549047A (en) 1941-04-28 1941-04-28 Improvements in electrical signalling systems utilising trains of impulses for control purposes

Publications (1)

Publication Number Publication Date
FR907461A true FR907461A (en) 1946-03-13

Family

ID=9797640

Family Applications (1)

Application Number Title Priority Date Filing Date
FR907461D Expired FR907461A (en) 1941-04-28 1942-04-28 Improvements to electrical signaling systems

Country Status (7)

Country Link
US (1) US2334591A (en)
BE (1) BE468430A (en)
CH (1) CH241317A (en)
DE (1) DE842361C (en)
FR (1) FR907461A (en)
GB (3) GB550350A (en)
NL (2) NL106092C (en)

Also Published As

Publication number Publication date
DE842361C (en) 1952-06-26
GB550350A (en) 1943-01-04
NL106092C (en)
BE468430A (en)
US2334591A (en) 1943-11-16
GB549047A (en) 1942-11-04
NL64857C (en)
CH241317A (en) 1946-02-28
GB549074A (en) 1942-11-04

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