GB600010A - Improvements in or relating to electrical signalling system - Google Patents

Improvements in or relating to electrical signalling system

Info

Publication number
GB600010A
GB600010A GB1218544A GB1218544A GB600010A GB 600010 A GB600010 A GB 600010A GB 1218544 A GB1218544 A GB 1218544A GB 1218544 A GB1218544 A GB 1218544A GB 600010 A GB600010 A GB 600010A
Authority
GB
United Kingdom
Prior art keywords
relay
tube
finder
line
wiper
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
GB1218544A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 NL101871A priority Critical patent/NL55722C/xx
Priority to FR882918D priority patent/FR882918A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to GB1218544A priority patent/GB600010A/en
Publication of GB600010A publication Critical patent/GB600010A/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B15/00—Supervisory desks or panels for centralised control or display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

600,010. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd (International Standard Electric Corporation). June 27, 1944, No. 12185. [Class 40 (iv)] [Also in Group XL (c)] A gas discharge tube which tests for the presence of a particular condition is made to take account of the continuance of the condition by causing it to test repeatedly under the control of an interrupter. In an identification system, the 20-line group containing a calling line is first identified by a multi-wiper finder F, and an appropriate final selector then hunts over the level allotted to that group to identify the individual line. The test wires of each 20-line group are commoned and connected over transformers T1 to the contacts of the finder F, each wiper of which is connected over a transformer T2 to the control electrode of a cold-cathode tube L. When a calling line has been extended by first and second line finders LF1, LF2, an alternating potential is placed on the test wire from a source Q and the finder F is started by relay Ar. In due course the marking potential stepped up by transformers T1, T2 fires the tube L which is biassed from a potentiometer Pt and relay Tr energizes in the main discharge path and disconnects relay R1, which was connected up by Ar. Relay R2 energizes over the left-hand wiper provided no other finder F is standing in the same position and brings about the operation of slow-release relay Sr1 which closes a marking or indicating circuit X and a periodically interrupted circuit for relay Vr. Each time relay Vr operates it extinguishes the main gap of the tube L which therefore tests again. If the marking potential is absent, the continued operation of R1 brings about the release of Sr1. To guard against operation by spurious impulses, it may be arranged that no indication is given until the tube L has responded a second time. Specification 597,688 is referred to.
GB1218544A 1944-06-27 1944-06-27 Improvements in or relating to electrical signalling system Expired GB600010A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL101871A NL55722C (en) 1944-06-27 1941-06-26
FR882918D FR882918A (en) 1944-06-27 1942-06-05 Systems for electrical signaling
GB1218544A GB600010A (en) 1944-06-27 1944-06-27 Improvements in or relating to electrical signalling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1218544A GB600010A (en) 1944-06-27 1944-06-27 Improvements in or relating to electrical signalling system

Publications (1)

Publication Number Publication Date
GB600010A true GB600010A (en) 1948-03-30

Family

ID=9999890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1218544A Expired GB600010A (en) 1944-06-27 1944-06-27 Improvements in or relating to electrical signalling system

Country Status (3)

Country Link
FR (1) FR882918A (en)
GB (1) GB600010A (en)
NL (1) NL55722C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490038A (en) * 1941-06-26 1949-12-06 Int Standard Electric Corp Electrical signaling system
US2598822A (en) * 1945-10-13 1952-06-03 Roelof M M Oberman Signaling system with private branch exchange subscriber

Also Published As

Publication number Publication date
NL55722C (en) 1943-12-15
FR882918A (en) 1943-06-18

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