FR1264135A - Système de signalisation électrique - Google Patents

Système de signalisation électrique

Info

Publication number
FR1264135A
FR1264135A FR830308A FR830308A FR1264135A FR 1264135 A FR1264135 A FR 1264135A FR 830308 A FR830308 A FR 830308A FR 830308 A FR830308 A FR 830308A FR 1264135 A FR1264135 A FR 1264135A
Authority
FR
France
Prior art keywords
signaling system
electrical signaling
electrical
signaling
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
FR830308A
Other languages
English (en)
Inventor
Harry George Whitehead
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 claimed from US821437A external-priority patent/US3214734A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to FR830308A priority Critical patent/FR1264135A/fr
Application granted granted Critical
Publication of FR1264135A publication Critical patent/FR1264135A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
    • G08B25/045—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop with sensing devices and central station in a closed loop, e.g. McCullough loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/14—Calling by using pulses
    • H04Q9/16—Calling by using pulses by predetermined number of pulses

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR830308A 1959-06-19 1960-06-17 Système de signalisation électrique Expired FR1264135A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR830308A FR1264135A (fr) 1959-06-19 1960-06-17 Système de signalisation électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US821437A US3214734A (en) 1959-06-19 1959-06-19 Protection signalling system having channel impedance alteration means for providing indications of remote station conditions
FR830308A FR1264135A (fr) 1959-06-19 1960-06-17 Système de signalisation électrique

Publications (1)

Publication Number Publication Date
FR1264135A true FR1264135A (fr) 1961-06-19

Family

ID=26186430

Family Applications (1)

Application Number Title Priority Date Filing Date
FR830308A Expired FR1264135A (fr) 1959-06-19 1960-06-17 Système de signalisation électrique

Country Status (1)

Country Link
FR (1) FR1264135A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176004A1 (fr) * 1972-03-15 1973-10-26 Ericsson Telefon Ab L M

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176004A1 (fr) * 1972-03-15 1973-10-26 Ericsson Telefon Ab L M

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