FR1138169A - Perfectionnements aux signaleurs - Google Patents

Perfectionnements aux signaleurs

Info

Publication number
FR1138169A
FR1138169A FR1138169DA FR1138169A FR 1138169 A FR1138169 A FR 1138169A FR 1138169D A FR1138169D A FR 1138169DA FR 1138169 A FR1138169 A FR 1138169A
Authority
FR
France
Prior art keywords
flaggers
training
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)
Inventor
Arthur Julius Radcliffe Jr
Arthur Robert Denz
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR1138169A publication Critical patent/FR1138169A/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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
FR1138169D 1954-12-21 1955-12-21 Perfectionnements aux signaleurs Expired FR1138169A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US476674A US2830128A (en) 1954-12-21 1954-12-21 Condenser-timed delayed signal repeater

Publications (1)

Publication Number Publication Date
FR1138169A true FR1138169A (fr) 1957-06-11

Family

ID=23892795

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1138169D Expired FR1138169A (fr) 1954-12-21 1955-12-21 Perfectionnements aux signaleurs

Country Status (3)

Country Link
US (1) US2830128A (fr)
DE (1) DE1024573B (fr)
FR (1) FR1138169A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070667A (en) * 1958-12-15 1962-12-25 Bell Telephone Labor Inc Inaudible supervisory signaling system
US3103558A (en) * 1959-09-24 1963-09-10 Int Standard Electric Corp ligotky
US3150232A (en) * 1961-02-06 1964-09-22 Edward R Schmidt Variable damping circuits
GB946952A (en) * 1961-06-14 1964-01-15 Ass Elect Ind Improvements relating to voice-frequency signal receivers as used in telephone systems
US3145266A (en) * 1961-06-29 1964-08-18 Gen Electric A. c. static switching circuits
US3092691A (en) * 1961-07-28 1963-06-04 Automatic Elect Lab Electronic pulse correction circuit
US4194093A (en) * 1978-11-29 1980-03-18 International Telephone And Telegraph Corporation Key system protective apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722560C (de) * 1938-09-12 1943-05-20 Philips Patentverwaltung Signalempfaenger
US2409105A (en) * 1942-11-19 1946-10-08 Siemens Brothers & Co Ltd Electrical timing arrangement

Also Published As

Publication number Publication date
US2830128A (en) 1958-04-08
DE1024573B (de) 1958-02-20

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