GB1296672A - Improvements in and relating to Protective Systems and Apparatus therefor - Google Patents

Improvements in and relating to Protective Systems and Apparatus therefor

Info

Publication number
GB1296672A
GB1296672A GB5184368A GB5184368A GB1296672A GB 1296672 A GB1296672 A GB 1296672A GB 5184368 A GB5184368 A GB 5184368A GB 5184368 A GB5184368 A GB 5184368A GB 1296672 A GB1296672 A GB 1296672A
Authority
GB
United Kingdom
Prior art keywords
loop
relating
apparatus therefor
protective systems
cheat
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
GB5184368A
Inventor
Goodwin Alfred George Ive
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1296672A publication Critical patent/GB1296672A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation

Abstract

1296672 Automatic alarm systems G A G IVE 4 Dec 1969 [1 Nov 1968] 51843/68 Addition to 1178957 Heading G4N In an alarm system claimed in the parent Specification having provision for different modes of operation during night and day a loop having shunt and series contacts b and a is terminated by an impedance R so selected in relation to the bi-state control (relay) connected to the loop that it is impossible for an intruder to "cheat" the system by connecting a "cheat" impedance R1 across the loop.
GB5184368A 1968-04-29 1968-11-01 Improvements in and relating to Protective Systems and Apparatus therefor Expired GB1296672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20320/68A GB1178957A (en) 1968-04-29 1968-04-29 Improvements in and relating to Electrical Protective Systems

Publications (1)

Publication Number Publication Date
GB1296672A true GB1296672A (en) 1972-11-15

Family

ID=10144025

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20320/68A Expired GB1178957A (en) 1968-04-29 1968-04-29 Improvements in and relating to Electrical Protective Systems
GB5184368A Expired GB1296672A (en) 1968-04-29 1968-11-01 Improvements in and relating to Protective Systems and Apparatus therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB20320/68A Expired GB1178957A (en) 1968-04-29 1968-04-29 Improvements in and relating to Electrical Protective Systems

Country Status (8)

Country Link
US (1) US3626403A (en)
BE (1) BE732211A (en)
CH (1) CH534405A (en)
DE (1) DE1921519C3 (en)
FR (1) FR2007221A1 (en)
GB (2) GB1178957A (en)
NL (1) NL6906607A (en)
SE (1) SE350866B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE402660B (en) * 1970-11-12 1978-07-10 Securitas Int Ab FIREPLACE FACILITY
US3765016A (en) * 1971-05-24 1973-10-09 Oak Electro Netics Corp Security system including means for polling the premises to be protected
US3706987A (en) * 1971-08-23 1972-12-19 Bay Alarm Co Alarm loop circuit system with light-emitting current-detection means
US3798628A (en) * 1971-09-27 1974-03-19 G Ive Protective systems and apparatus therefor
FR2189800B1 (en) * 1972-06-15 1977-02-11 Inertia Switch Ltd
US4333094A (en) * 1978-12-04 1982-06-01 Homexx International Corp. Swimming pool alarm
DE3065857D1 (en) * 1979-02-09 1984-01-19 Philip Charles Sefton Improvements relating to security equipment
US4524349A (en) * 1982-08-09 1985-06-18 Nel-Tech Development, Inc. Security system having detector sensing and identification
US4567471A (en) * 1983-08-08 1986-01-28 Pittway Corporation Monitoring system
US5200734A (en) * 1992-01-06 1993-04-06 Lin Tieng Fu Detecting and alarming system for detecting shortcircuited or broken circuit
WO2009073571A2 (en) * 2007-11-29 2009-06-11 Intelligent Sentinel Technologies, Llc Systems and methods for a property sentinel
ES2795779T3 (en) * 2017-12-06 2020-11-24 Defond Electech Co Ltd A sensing circuit module for use in sensing an operating state of a home appliance door
IT201800006542A1 (en) * 2018-06-22 2018-09-22 Door lock device.
US10636274B1 (en) * 2019-01-02 2020-04-28 The Boeing Company Reconfigurable enclosure system with barrier continuity loop intrusion detection

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944252A (en) * 1957-01-07 1960-07-05 American District Telegraph Co Intruder alarm system
US3010100A (en) * 1958-06-30 1961-11-21 American District Telegraph Co Direct current operated burglar alarm system with alternating current supervision
US2971186A (en) * 1959-06-30 1961-02-07 Ripepi Tony Central warning burglar alarm system
US3254334A (en) * 1963-12-19 1966-05-31 American District Telegraph Co Electrical protection system utilizing reverse polarity line testing with unidirectional current devices having reverse breakdown characteristic
US3287718A (en) * 1964-03-10 1966-11-22 Lloyd S Stensrud Subscriber alarm system
US3286250A (en) * 1964-10-16 1966-11-15 Teitelbaum Menashe Burglar alarm utilizing bi-stable electronic switches
US3351934A (en) * 1965-05-19 1967-11-07 Honeywell Inc Supervised alarm system
US3470554A (en) * 1966-03-09 1969-09-30 Johnson Service Co Intrusion alarm system having authorization capability with tamper detection means

Also Published As

Publication number Publication date
DE1921519A1 (en) 1970-08-27
SE350866B (en) 1972-11-06
GB1178957A (en) 1970-01-28
DE1921519B2 (en) 1979-04-26
US3626403A (en) 1971-12-07
CH534405A (en) 1973-02-28
BE732211A (en) 1969-10-01
DE1921519C3 (en) 1979-12-20
FR2007221A1 (en) 1970-01-02
NL6906607A (en) 1969-10-31

Similar Documents

Publication Publication Date Title
GB1296672A (en) Improvements in and relating to Protective Systems and Apparatus therefor
GB1025589A (en) Burglar alarm apparatus and system
GB1476525A (en) Crane load warning system
GB1120455A (en) Remote-controlled alarm networks
US3039085A (en) Magnetic core annunciator system
JPS52155904A (en) Response confirming system for simultaneous information
JPS53131706A (en) Automatic telephone exchange system
JPS5341687A (en) Remote control system
CA666082A (en) Alarm signaling system
GB1528055A (en) Automatic electrical alarm system
CA638501A (en) Local alarm circuit for burglar alarm system
JPS52151504A (en) Alarm sending system
JPS51114098A (en) Communication signal controller
CA781048A (en) Alarm system
JPS56103386A (en) Clock supplying system
ES379997A1 (en) Alarm circuit. (Machine-translation by Google Translate, not legally binding)
CA938676A (en) Voice alerting radio detection alarm system
CA666083A (en) Alarm signaling system
JPS52106209A (en) Automatic answering telephone system with alarm signal
CA822313A (en) Data set for polar current loop signaling
JPS5340177A (en) Input and output control system in remote supervising control system
JPS5348713A (en) Automatic setting system for gain
JPS53105685A (en) Information trasmitting system
JPS56103556A (en) Duplication switching system for remote monitor device
CA742311A (en) Telephone signal reporting system

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee