US1932679A - Electrical signaling system - Google Patents

Electrical signaling system Download PDF

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Publication number
US1932679A
US1932679A US599221A US59922132A US1932679A US 1932679 A US1932679 A US 1932679A US 599221 A US599221 A US 599221A US 59922132 A US59922132 A US 59922132A US 1932679 A US1932679 A US 1932679A
Authority
US
United States
Prior art keywords
signals
circuit
frequencies
signal
frequency
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 - Lifetime
Application number
US599221A
Other languages
English (en)
Inventor
Ryall Leonard Ernest
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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 Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of US1932679A publication Critical patent/US1932679A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Amplifiers (AREA)
US599221A 1931-03-17 1932-03-16 Electrical signaling system Expired - Lifetime US1932679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8156/31A GB375346A (en) 1931-03-17 1931-03-17 Improvements in audio frequency signalling systems

Publications (1)

Publication Number Publication Date
US1932679A true US1932679A (en) 1933-10-31

Family

ID=9846823

Family Applications (1)

Application Number Title Priority Date Filing Date
US599221A Expired - Lifetime US1932679A (en) 1931-03-17 1932-03-16 Electrical signaling system

Country Status (3)

Country Link
US (1) US1932679A (fr)
FR (1) FR733759A (fr)
GB (1) GB375346A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468574A (en) * 1945-03-23 1949-04-26 Teletype Corp Selective control of printer motors at outlying telegraph stations
US2596977A (en) * 1947-10-08 1952-05-20 Int Standard Electric Corp Ringing equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954519C (de) * 1951-12-13 1956-12-20 Standard Elek K Ag Schaltungsanordnung zum Empfang von Ruf- und Wahlzeichen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468574A (en) * 1945-03-23 1949-04-26 Teletype Corp Selective control of printer motors at outlying telegraph stations
US2596977A (en) * 1947-10-08 1952-05-20 Int Standard Electric Corp Ringing equipment

Also Published As

Publication number Publication date
GB375346A (en) 1932-06-17
FR733759A (fr) 1932-10-11

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