FR933089A - Perfectionnements concernant les systèmes téléphoniques automatiques - Google Patents

Perfectionnements concernant les systèmes téléphoniques automatiques

Info

Publication number
FR933089A
FR933089A FR933089DA FR933089A FR 933089 A FR933089 A FR 933089A FR 933089D A FR933089D A FR 933089DA FR 933089 A FR933089 A FR 933089A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
telephone
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
English (en)
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 FR933089A publication Critical patent/FR933089A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04Q1/50—Conversion between different kinds of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
FR933089D 1942-04-20 1946-08-29 Perfectionnements concernant les systèmes téléphoniques automatiques Expired FR933089A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB247351X 1942-04-20

Publications (1)

Publication Number Publication Date
FR933089A true FR933089A (fr) 1948-04-09

Family

ID=10216422

Family Applications (1)

Application Number Title Priority Date Filing Date
FR933089D Expired FR933089A (fr) 1942-04-20 1946-08-29 Perfectionnements concernant les systèmes téléphoniques automatiques

Country Status (5)

Country Link
US (1) US2422285A (pm)
CH (2) CH247351A (pm)
FR (1) FR933089A (pm)
GB (1) GB556920A (pm)
NL (1) NL71148C (pm)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463972A (en) * 1923-08-07 Automatic telephone system
US1503923A (en) * 1918-05-06 1924-08-05 Stromberg Carlson Telephone Telephone switching system
US2090205A (en) * 1934-06-21 1937-08-17 Siemens Brothers & Co Ltd Electric remote control system
US2058216A (en) * 1935-05-11 1936-10-20 Bell Telephone Labor Inc Signaling system
GB469664A (en) * 1936-01-29 1937-07-29 Automatic Electric Co Ltd Improvements in automatic switches for use in telephone or like systems

Also Published As

Publication number Publication date
NL71148C (pm)
CH251036A (fr) 1947-09-30
GB556920A (en) 1943-10-27
CH247351A (fr) 1947-02-28
US2422285A (en) 1947-06-17

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