DE2064858C3 - Anordnung zur Alarmauslösung in einem Bewachungsgerät bei unerlaubten Manipulationen mit einer Signalgebungsschleife, die die zu bewachenden Objekte verbindet - Google Patents

Anordnung zur Alarmauslösung in einem Bewachungsgerät bei unerlaubten Manipulationen mit einer Signalgebungsschleife, die die zu bewachenden Objekte verbindet

Info

Publication number
DE2064858C3
DE2064858C3 DE2064858A DE2064858A DE2064858C3 DE 2064858 C3 DE2064858 C3 DE 2064858C3 DE 2064858 A DE2064858 A DE 2064858A DE 2064858 A DE2064858 A DE 2064858A DE 2064858 C3 DE2064858 C3 DE 2064858C3
Authority
DE
Germany
Prior art keywords
signal
guarded
objects
alarm
loop
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
DE2064858A
Other languages
German (de)
English (en)
Other versions
DE2064858A1 (de
DE2064858B2 (de
Inventor
Tage Vilhelm Leander Enskede Andersson
Lars Rune Tyresoe Isheden
Bo Emil Haegersten Johansson
Stig Erik Skaerholmen Warring
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 DE2064858A1 publication Critical patent/DE2064858A1/de
Publication of DE2064858B2 publication Critical patent/DE2064858B2/de
Application granted granted Critical
Publication of DE2064858C3 publication Critical patent/DE2064858C3/de
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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit
DE2064858A 1970-01-08 1970-12-30 Anordnung zur Alarmauslösung in einem Bewachungsgerät bei unerlaubten Manipulationen mit einer Signalgebungsschleife, die die zu bewachenden Objekte verbindet Expired DE2064858C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE00162/70A SE329358B (xx) 1970-01-08 1970-01-08

Publications (3)

Publication Number Publication Date
DE2064858A1 DE2064858A1 (de) 1971-07-15
DE2064858B2 DE2064858B2 (de) 1973-10-31
DE2064858C3 true DE2064858C3 (de) 1974-05-30

Family

ID=20256131

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2064858A Expired DE2064858C3 (de) 1970-01-08 1970-12-30 Anordnung zur Alarmauslösung in einem Bewachungsgerät bei unerlaubten Manipulationen mit einer Signalgebungsschleife, die die zu bewachenden Objekte verbindet

Country Status (6)

Country Link
US (1) US3710372A (xx)
DE (1) DE2064858C3 (xx)
DK (1) DK124153B (xx)
GB (1) GB1295189A (xx)
NO (1) NO124613B (xx)
SE (1) SE329358B (xx)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792469A (en) * 1972-07-17 1974-02-12 Johnson Service Co Multiplexed alarm transmission system having alarm storage circuits
FR2324172A1 (fr) * 1975-09-15 1977-04-08 Gautier Gerard Dispositif de protection antifrauduleuse pour ligne telephonique exploitee en transmission d'alarme
SE7803437L (sv) * 1978-03-28 1979-09-29 Saab Scania Ab Forfarande for att vid en anleggning vars enheter er sammanbundna medelst en kommunikationsledning for informationsberande signaler, kontinuerligt overvaka tillstandet for de till kommunikationsledningen anslutna ...
US4240078A (en) * 1978-06-07 1980-12-16 Minnesota Mining And Manufacturing Company Frequency selective annunciator system
US4262284A (en) * 1978-06-26 1981-04-14 Stieff Lorin R Self-monitoring seal
US4229734A (en) * 1978-10-26 1980-10-21 Honeywell Inc. Line supervision
US4268823A (en) * 1979-11-02 1981-05-19 Ici Americas Inc. Protective electrical system for providing indications of removal of objects from plural monitored locations by use of parallel-connected object-sensors
US4577184A (en) * 1983-05-23 1986-03-18 Tetra-Tech, Inc. Security system with randomly modulated probe signal
US4555930A (en) * 1984-02-14 1985-12-03 Control Instruments Corp. Digital gas sensing system
JPS61177841A (ja) * 1985-02-04 1986-08-09 Mitsubishi Electric Corp 直列伝送装置
US4716401A (en) * 1985-09-19 1987-12-29 Deere & Company Tamper-resistant supervisory system
ATE85737T1 (de) * 1987-08-14 1993-02-15 Siemens Ag Datenuebertragungsverfahren.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423649A (en) * 1944-12-08 1947-07-08 Horvitch Gerard Michael Electric burglar alarm
US3253270A (en) * 1963-08-02 1966-05-24 Downer Frank Theft alarm for shoplift prevention

Also Published As

Publication number Publication date
SE329358B (xx) 1970-10-05
DE2064858A1 (de) 1971-07-15
GB1295189A (xx) 1972-11-01
US3710372A (en) 1973-01-09
NO124613B (xx) 1972-05-08
DE2064858B2 (de) 1973-10-31
DK124153B (da) 1972-09-18

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee