FI803789L - NOEDSIGNALANORDNING - Google Patents

NOEDSIGNALANORDNING

Info

Publication number
FI803789L
FI803789L FI803789A FI803789A FI803789L FI 803789 L FI803789 L FI 803789L FI 803789 A FI803789 A FI 803789A FI 803789 A FI803789 A FI 803789A FI 803789 L FI803789 L FI 803789L
Authority
FI
Finland
Prior art keywords
emergency call
line
branch
station
capacitor
Prior art date
Application number
FI803789A
Other languages
Finnish (fi)
Other versions
FI68132B (en
FI68132C (en
Inventor
Dirk Neumann
Original Assignee
Neumann Elektronik Gmbh
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 Neumann Elektronik Gmbh filed Critical Neumann Elektronik Gmbh
Publication of FI803789L publication Critical patent/FI803789L/en
Publication of FI68132B publication Critical patent/FI68132B/en
Application granted granted Critical
Publication of FI68132C publication Critical patent/FI68132C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Alarm Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Peptides Or Proteins (AREA)
  • Saccharide Compounds (AREA)

Abstract

1. Emergency call installation comprising at least one emergency call column and an inquiry-station connected there-with through a two-branch line serving for the signal transmission as well as for the supply of the D.C. voltage to each of the emergency call columns from the inquiry-station, each of the emergency call columns including a telephone station as well as switching arrangement for establishing and interrupting the connexion with the inquiry-station, characterized in that the switching arrangement comprises a doublewound bistable relay (K) through the contact (k) of which, in the non-activated state of the emergency call column, the first branch (a) of the line is connected, through a first resistor (R1) with one electrode of a first capacitor (C1) and, in the activated state of the emergency call column, is connected with the telephone station (FE), the other electrode of the capacitor (C1) being connected with the second branch (b) of the line whereby, for activation of said emergency call column, the two electrodes of the first capacitor (C1) are adapted to be connected together through a contact (t1) which can be momentarily actuated by a key button (T), as well as through the first coil of the bistable relay (K), and that a second capacitor (C2, C3) is provided one electrode of which is connected, between the contact (k) of the bistable relay (K) and the telephone station (FE), with the first branch (a) of the line, where as its other electrode is connected with the second branch (b) of the line, and both electrodes of which are adapted to be connected together through a controllable switching element (I, Tr1) and the second coil of the bistable relay (K), whereby the controllable switching element (I, Tr1) is arranged and designed so that it closes when the feeding voltage supplied through the line (a, b), attains the zero value.
FI803789A 1979-12-08 1980-12-05 NOEDANROPSANLAEGGNING FI68132C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2949513 1979-12-08
DE2949513A DE2949513C2 (en) 1979-12-08 1979-12-08 Emergency call system

Publications (3)

Publication Number Publication Date
FI803789L true FI803789L (en) 1981-06-09
FI68132B FI68132B (en) 1985-03-29
FI68132C FI68132C (en) 1985-07-10

Family

ID=6087978

Family Applications (1)

Application Number Title Priority Date Filing Date
FI803789A FI68132C (en) 1979-12-08 1980-12-05 NOEDANROPSANLAEGGNING

Country Status (4)

Country Link
EP (1) EP0030395B1 (en)
AT (1) ATE2923T1 (en)
DE (1) DE2949513C2 (en)
FI (1) FI68132C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541400C1 (en) * 1995-11-07 1997-02-13 Neumann Elektronik Gmbh Information emergency call system
DE102008035920A1 (en) 2008-08-01 2010-02-04 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Circuit arrangement for a serial communication with wake-up function

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1412680B1 (en) * 1961-07-20 1971-01-07 Tekade Fernmeldeapp Gmbh Circuit arrangement for establishing a connection between a call station and the answering station of a telephone exchange
FR2169471A5 (en) * 1972-01-26 1973-09-07 Marinier Pierre
JPS5011507A (en) * 1973-05-31 1975-02-06
DE2758689C3 (en) * 1977-12-29 1981-02-12 Neumann Elektronik Gmbh, 4330 Muelheim Emergency call system
US4169216A (en) * 1978-05-08 1979-09-25 Northern Telecom Limited Electronic hold and hold-release circuit for a telephone set in a multiple extension single line telephone system

Also Published As

Publication number Publication date
FI68132B (en) 1985-03-29
DE2949513A1 (en) 1981-06-11
EP0030395A1 (en) 1981-06-17
DE2949513C2 (en) 1983-12-22
FI68132C (en) 1985-07-10
EP0030395B1 (en) 1983-03-30
ATE2923T1 (en) 1983-04-15

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: NEUMANN ELEKTRONIK GMBH