GB701622A - Improvements in and relating to voice frequency signal receivers - Google Patents

Improvements in and relating to voice frequency signal receivers

Info

Publication number
GB701622A
GB701622A GB254852A GB254852A GB701622A GB 701622 A GB701622 A GB 701622A GB 254852 A GB254852 A GB 254852A GB 254852 A GB254852 A GB 254852A GB 701622 A GB701622 A GB 701622A
Authority
GB
United Kingdom
Prior art keywords
valve
circuit
frequency
condenser
limiter
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
GB254852A
Other languages
English (en)
Inventor
Thomas Frederick St Hargreaves
Hector Thomas Prior
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE523338D priority Critical patent/BE523338A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB254852A priority patent/GB701622A/en
Publication of GB701622A publication Critical patent/GB701622A/en
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)
  • Selective Calling Equipment (AREA)
  • Burglar Alarm Systems (AREA)
GB254852A 1952-01-30 1952-01-30 Improvements in and relating to voice frequency signal receivers Expired GB701622A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE523338D BE523338A (de) 1952-01-30
GB254852A GB701622A (en) 1952-01-30 1952-01-30 Improvements in and relating to voice frequency signal receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB254852A GB701622A (en) 1952-01-30 1952-01-30 Improvements in and relating to voice frequency signal receivers

Publications (1)

Publication Number Publication Date
GB701622A true GB701622A (en) 1953-12-30

Family

ID=9741528

Family Applications (1)

Application Number Title Priority Date Filing Date
GB254852A Expired GB701622A (en) 1952-01-30 1952-01-30 Improvements in and relating to voice frequency signal receivers

Country Status (2)

Country Link
BE (1) BE523338A (de)
GB (1) GB701622A (de)

Also Published As

Publication number Publication date
BE523338A (de)

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