SE329358B - - Google Patents

Info

Publication number
SE329358B
SE329358B SE00162/70A SE16270A SE329358B SE 329358 B SE329358 B SE 329358B SE 00162/70 A SE00162/70 A SE 00162/70A SE 16270 A SE16270 A SE 16270A SE 329358 B SE329358 B SE 329358B
Authority
SE
Sweden
Prior art keywords
guarded
guarding
loop
objects
alarm
Prior art date
Application number
SE00162/70A
Inventor
B Johansson
S Warring
T Andersson
L Isheden
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE00162/70A priority Critical patent/SE329358B/xx
Publication of SE329358B publication Critical patent/SE329358B/xx
Priority to US00096332A priority patent/US3710372A/en
Priority to DE2064858A priority patent/DE2064858C3/en
Priority to GB1295189D priority patent/GB1295189A/en
Priority to DK5871AA priority patent/DK124153B/en
Priority to NO0048/71A priority patent/NO124613B/no

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

Abstract

An arrangement for causing an alarm in a guarding device, for example a burglary alarm device, includes a central guarding unit which sends out control signals through a loop to a number of objects to be guarded. The objects are connected in series with the guarding unit and upon unwarranted manipulation with the loop, for example upon attempts to by-pass an object, an alarm is obtained. Each object to be guarded comprises a signal translating means which translates the signal obtained through the loop in a manner characteristic of the respective object. The central guarding unit compares the control signal sent out from the guarding unit, with the signal sent back from the objects to be guarded. At least one of said two signals is translated before the comparison in order to obtain the same translation which has been obtained in the object to be guarded. During a comparison when an inequality between the two signals is sensed the alarm device is operated.
SE00162/70A 1970-01-08 1970-01-08 SE329358B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE00162/70A SE329358B (en) 1970-01-08 1970-01-08
US00096332A US3710372A (en) 1970-01-08 1970-12-09 Alarm system for monitoring a plurality of serially connected objects utilizing signal translation techniques
DE2064858A DE2064858C3 (en) 1970-01-08 1970-12-30 Arrangement for triggering an alarm in a security device in the event of unauthorized manipulation with a signaling loop that connects the objects to be guarded
GB1295189D GB1295189A (en) 1970-01-08 1970-12-30
DK5871AA DK124153B (en) 1970-01-08 1971-01-07 Device at a monitoring system, e.g. a burglar alarm system.
NO0048/71A NO124613B (en) 1970-01-08 1971-01-07

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
SE329358B true SE329358B (en) 1970-10-05

Family

ID=20256131

Family Applications (1)

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

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979000844A1 (en) * 1978-03-28 1979-11-01 Saab Scania Ab An arrangement for security systems

Families Citing this family (11)

* 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 (en) * 1975-09-15 1977-04-08 Gautier Gerard ANTI-FRAUDULENT PROTECTION DEVICE FOR TELEPHONE LINE OPERATED IN ALARM TRANSMISSION
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 (en) * 1985-02-04 1986-08-09 Mitsubishi Electric Corp Series transmitting device
US4716401A (en) * 1985-09-19 1987-12-29 Deere & Company Tamper-resistant supervisory system
ES2040786T3 (en) * 1987-08-14 1993-11-01 Siemens Aktiengesellschaft DATA TRANSMISSION PROCEDURE.

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979000844A1 (en) * 1978-03-28 1979-11-01 Saab Scania Ab An arrangement for security systems

Also Published As

Publication number Publication date
DE2064858B2 (en) 1973-10-31
DE2064858C3 (en) 1974-05-30
US3710372A (en) 1973-01-09
DE2064858A1 (en) 1971-07-15
GB1295189A (en) 1972-11-01
DK124153B (en) 1972-09-18
NO124613B (en) 1972-05-08

Similar Documents

Publication Publication Date Title
SE329358B (en)
NL145015B (en) DOOR LOCK.
CA956008A (en) Integrated fully supervised fire alarm system
DK122752B (en) Security lock.
CA948800A (en) Security alarm system
CA923603A (en) Circuit for avoiding false lock
CA842090A (en) Door lock with safety device
CA720571A (en) Security alarm system
DK111813B (en) Door lock for a combined washing machine and centrifuge.
CA795092A (en) Frangible key for locking alarm signal stations
CA725448A (en) Mechanical lock, brake and coupling apparatus
CA732840A (en) Safety door lock
CA709087A (en) Supervised detection and alarm system
CA661045A (en) Safety door lock and control for washing machine
AT286816B (en) Lock, especially door lock
CA837236A (en) Alarm lock
AU289447B2 (en) Lock with variable, inconstant key
CA840088A (en) Lock mechanism and alarm
CA781041A (en) Alarm monitoring system
CA780564A (en) Personnel security system employing fingerprinting
CA777993A (en) Intrusion detection system
CA818813A (en) Cylindrical lock with associated key
AU430653B2 (en) Intrusion detection apparatus having supervisory control means
GR23342B (en) ALARM (SECURITY) SYSTEM.
CA776436A (en) Sliding door panic device