GB721795A - Electrical impulse generator - Google Patents

Electrical impulse generator

Info

Publication number
GB721795A
GB721795A GB32254/52A GB3225452A GB721795A GB 721795 A GB721795 A GB 721795A GB 32254/52 A GB32254/52 A GB 32254/52A GB 3225452 A GB3225452 A GB 3225452A GB 721795 A GB721795 A GB 721795A
Authority
GB
United Kingdom
Prior art keywords
impulses
impulse generator
dec
output terminals
electrical impulse
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
GB32254/52A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB721795A publication Critical patent/GB721795A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

721,795. Automatic exchange systems. TELEFONAKTIEBOLAGET L. M. ERICSSON. Dec. 19, 1952 [Dec. 19, 1951], No. 32254/52. Class 40 (4). An impulse generator, especially for metering, is associated with a relay circuit so that output terminals produce impulses at differently spaced intervals of time. The impulse generator IG operates and releases R1 which feeds three relay chains A1-A3, B1-B4, D1-D5, which operate cyclically. A1, B1 B3 and D1 control relays R2, R3, R4, R5 which therefore operate once every 2, 3, 4 and 5 impulses respectively. R2-R5 control output terminals 2-12 which produce impulses every 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 or 60 impulses of IG. These impulses may be used for metering according to the connection obtained.
GB32254/52A 1951-12-19 1952-12-19 Electrical impulse generator Expired GB721795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE721795X 1951-12-19

Publications (1)

Publication Number Publication Date
GB721795A true GB721795A (en) 1955-01-12

Family

ID=20316016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32254/52A Expired GB721795A (en) 1951-12-19 1952-12-19 Electrical impulse generator

Country Status (3)

Country Link
BE (1) BE516334A (en)
FR (1) FR1067734A (en)
GB (1) GB721795A (en)

Also Published As

Publication number Publication date
FR1067734A (en) 1954-06-17
BE516334A (en)

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