GB940070A - Alarm installation - Google Patents

Alarm installation

Info

Publication number
GB940070A
GB940070A GB3585260A GB3585260A GB940070A GB 940070 A GB940070 A GB 940070A GB 3585260 A GB3585260 A GB 3585260A GB 3585260 A GB3585260 A GB 3585260A GB 940070 A GB940070 A GB 940070A
Authority
GB
United Kingdom
Prior art keywords
alarm
signal
signals
sign
sent
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
GB3585260A
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.)
Telectronics SA
Original Assignee
Telectronics SA
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 Telectronics SA filed Critical Telectronics SA
Publication of GB940070A publication Critical patent/GB940070A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)

Abstract

940,070. Automatic exchange systems. TELECTRONIC S.A. Oct. 19, 1960 [Oct. 28, 1959], No. 35852/60. Drawings to Specification. Heading H4K. An alarm installation connected to a telephone system is adapted when operated to feed into the telephone system at least one alarm signal selected from two or more alarm signals permanently on record in the installation and intended to be directed to different receiving stations; the installation includes at least one detector circuit, an endless magnetic tape carrying the recorded alarm signals, a device for reading-out the recorded signals, a selection device supplying the read-out signals selectively to the telephone system, a control device for stopping transmission of the alarm signals, and self-contained power supplies for the installation, the control device comprising a local control and a device able to receive a signal transmitted over the telephone system to operate the control device remotely, and the selection device being controlled by additional signals recorded on the tape and associated with each alarm signal. As described, an endless loop of tape carries a series of messages, each comprising dial impulses, the information to be sent, and a sign-off signal. The sign-off signal is of such a length as to cause release of a slow-release relay by blocking a transistor (dial impulses being produced similarly) and hence release of the telephone line. The next message is therefore not transmitted, but its sign-off signal causes a further switching operation which re-connects the line. Thus, alternate messages are sent. If the tape loop contains an odd number of messages, all are sent, whereas only half are sent if the loop holds an even number. During any one of the gaps in transmission the called station may dial the alarm station, the resulting ringing current bringing about a switching operation to stop the alarm apparatus which goes home (a closedown signal, even longer than the sign-off signal, initiating release). There may be two (or more) alarm detectors, e.g. one for fire and one for burglary, one despatching the odd-numbered messages and the other the even-numbered.
GB3585260A 1959-10-28 1960-10-19 Alarm installation Expired GB940070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7997859 1959-10-28

Publications (1)

Publication Number Publication Date
GB940070A true GB940070A (en) 1963-10-23

Family

ID=4537562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3585260A Expired GB940070A (en) 1959-10-28 1960-10-19 Alarm installation

Country Status (2)

Country Link
CH (1) CH360317A (en)
GB (1) GB940070A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117600A (en) * 1982-03-05 1983-10-12 Hashimoto Corp Automatic telephone answering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117600A (en) * 1982-03-05 1983-10-12 Hashimoto Corp Automatic telephone answering device

Also Published As

Publication number Publication date
CH360317A (en) 1962-02-15

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