CH297999A - Wechselstrom-Signalisierungs-Empfänger. - Google Patents

Wechselstrom-Signalisierungs-Empfänger.

Info

Publication number
CH297999A
CH297999A CH297999DA CH297999A CH 297999 A CH297999 A CH 297999A CH 297999D A CH297999D A CH 297999DA CH 297999 A CH297999 A CH 297999A
Authority
CH
Switzerland
Prior art keywords
signaling receiver
signaling
receiver
Prior art date
Application number
Other languages
German (de)
English (en)
Inventor
Ernest Ryall Leonard
Original Assignee
Ernest Ryall Leonard
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 Ernest Ryall Leonard filed Critical Ernest Ryall Leonard
Publication of CH297999A publication Critical patent/CH297999A/de

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)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Noise Elimination (AREA)
CH297999D 1950-03-08 1951-03-07 Wechselstrom-Signalisierungs-Empfänger. CH297999A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB297999X 1950-03-08

Publications (1)

Publication Number Publication Date
CH297999A true CH297999A (de) 1954-04-15

Family

ID=10297349

Family Applications (1)

Application Number Title Priority Date Filing Date
CH297999D CH297999A (de) 1950-03-08 1951-03-07 Wechselstrom-Signalisierungs-Empfänger.

Country Status (6)

Country Link
US (1) US2686227A (en, 2012)
BE (1) BE501722A (en, 2012)
CH (1) CH297999A (en, 2012)
FR (1) FR1042770A (en, 2012)
GB (1) GB691741A (en, 2012)
NL (2) NL159620C (en, 2012)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749390A (en) * 1952-12-02 1956-06-05 Itt Ringing circuit for telephone line and radio order wire
FR1096599A (fr) * 1953-12-22 1955-06-22 Lignes Telegraph Telephon Dispositif comportant des éléments non linéaires associés à des circuits sélectifs
US2806903A (en) * 1954-03-24 1957-09-17 Int Standard Electric Corp Voice frequency signal receivers
US2957950A (en) * 1954-11-18 1960-10-25 Bell Telephone Labor Inc Transistor selective ringing circuit
US2955161A (en) * 1956-06-29 1960-10-04 Automatic Elect Lab Tone detector for coin control
US2939919A (en) * 1958-04-17 1960-06-07 Bell Telephone Labor Inc Subscriber ringing in carrier telephone systems
GB946952A (en) * 1961-06-14 1964-01-15 Ass Elect Ind Improvements relating to voice-frequency signal receivers as used in telephone systems
DE1146137B (de) * 1961-11-16 1963-03-28 Standard Elektrik Lorenz Ag Tonfrequenzsignalempfaenger mit Sprachsperre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145053A (en) * 1936-11-18 1939-01-24 Bell Telephone Labor Inc Signaling system
US2282131A (en) * 1940-01-12 1942-05-05 Associated Electric Lab Inc Electrical signaling system
GB541731A (en) * 1940-06-07 1941-12-09 Telephone Mfg Co Ltd Improvements in and relating to telephone and like systems

Also Published As

Publication number Publication date
NL84411C (en, 2012)
GB691741A (en) 1953-05-20
BE501722A (en, 2012)
FR1042770A (fr) 1953-11-03
NL159620C (en, 2012)
US2686227A (en) 1954-08-10

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