GB476880A - System of voice frequency alternating current signalling and impulsing - Google Patents

System of voice frequency alternating current signalling and impulsing

Info

Publication number
GB476880A
GB476880A GB16687/36A GB1668736A GB476880A GB 476880 A GB476880 A GB 476880A GB 16687/36 A GB16687/36 A GB 16687/36A GB 1668736 A GB1668736 A GB 1668736A GB 476880 A GB476880 A GB 476880A
Authority
GB
United Kingdom
Prior art keywords
train
cycle
over
junction
energized
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
GB16687/36A
Other languages
English (en)
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.)
PANSTWOWE ZAKLADY TELE I RADJO
Original Assignee
PANSTWOWE ZAKLADY TELE I RADJO
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 PANSTWOWE ZAKLADY TELE I RADJO filed Critical PANSTWOWE ZAKLADY TELE I RADJO
Publication of GB476880A publication Critical patent/GB476880A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Burglar Alarm Systems (AREA)
GB16687/36A 1935-06-15 1936-06-15 System of voice frequency alternating current signalling and impulsing Expired GB476880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL476880X 1935-06-15

Publications (1)

Publication Number Publication Date
GB476880A true GB476880A (en) 1937-12-15

Family

ID=19936377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16687/36A Expired GB476880A (en) 1935-06-15 1936-06-15 System of voice frequency alternating current signalling and impulsing

Country Status (2)

Country Link
BE (1) BE416075A (enrdf_load_stackoverflow)
GB (1) GB476880A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE416075A (enrdf_load_stackoverflow)

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