US3503067A - Remote identification system - Google Patents

Remote identification system Download PDF

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Publication number
US3503067A
US3503067A US682107A US3503067DA US3503067A US 3503067 A US3503067 A US 3503067A US 682107 A US682107 A US 682107A US 3503067D A US3503067D A US 3503067DA US 3503067 A US3503067 A US 3503067A
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United States
Prior art keywords
current
generator
detectors
detector
generators
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 - Lifetime
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US682107A
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English (en)
Inventor
Abel B Amiragoff
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Etablissement Pour Applications Electroniques Anstalt
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Etablis Pour Applic Electroniq
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Priority claimed from BE653696A external-priority patent/BE653696A/fr
Application filed by Etablis Pour Applic Electroniq filed Critical Etablis Pour Applic Electroniq
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    • 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
    • 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
    • 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
    • G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance

Definitions

  • a remote identification system comprises a plurality of electronic relay circuits each capable upon actuation of causing the flow of a similar increment of current.
  • the relay circuits are coupled each to the next in a series such that actuation of any one of the relay circuits causes the actuation of the next following relay circuit of the series.
  • a plurality of detectors each associated with and coupled electrically to a respective one of the relay circuits for actuation thereof when the associated detector operates, a common conductor connected to all of the relay circuits, There is a current-amplitude re sponsive device connected to the common conductor for indicating the sum total of the increments of current caused to flow in the common conductor as a result of actuation of any one relay circuit by its associated detector with resultant actuation of the other following relay circuits of the series.
  • the present invention relates to means for identification from a distance, and has as its object the provision of a method and an apparatus by means of which it is possible to monitor the operation of, and to identify, a supervisory detector belonging to a network of automatic monitoring and alarm devices adapted to respond to external stimula tions produced by any appropriate physical, chemical or physico-chemical agent.
  • the apparatus to fire detection or to the combination of a network of fire detectors with proximity (anti-theft) detectors, means for detecting the opening and closing of doors and, in general, any apparatus whose essential function is to provide an alarm, to trigger counter-measure systems or automatic prevention devices.
  • This method consists essentially in providing a pulse generator in association with each detector of the network, in placing the output circuits of these generators in series by connecting them to a device situated at a central station, so that when one of the generators emits a pulse as a result of the operation of the detector with which it is associated, this pulse brings about the operation of the succeeding generator, whereby there 3,503,067 Patented Mar.
  • FIGURE 1 of the accompanying drawing is a circuit diagram having a network of detectors arranged according to the invention.
  • a series of signal generators 2A, 2B, 2N are provided each in association with a respective one of a series of detectors 1A, 1B, IN.
  • the signal generators are so arranged that the operation of one of them actuates the succeeding generator, and so on, in cascade, up to the last one.
  • Each actuated generator transmits a signal along the line 4.
  • the generators 2A, 2B, 2N supply constant current.
  • These generators may be of any type known per se, for example of the type comprising thyratrons, semiconductors, etc.
  • I is the current of a generator and m the number of sequentially actuated generators
  • the current strength along the line 4 will be mI.
  • This strength which is measured on a measuring instrument 5, e.g. an ammeter, therefore determines the number of generators which have been actuated in the network, and thus identifies the detector which has produced the alarm.
  • the detector 1A operators for example as a result of the appearance of smoke revealing the commencement of a fire, it actuates the generator 2A associated therewith.
  • This generator transmits a constant-current signal I along the line 4 and energizes.
  • the generator 2B transmits a signal I along the line 4 and energises the succeeding generator 2C, and so on until the last generator 2N has operated and emitted a i signal I.
  • a signal current of amplitude NI which is measured at the indicating device 5.
  • the latter may be a milliammeter or an ammeter, optionally graduated in numbers of detectors, or again an electronic voltmeter or even both when the number of detectors installed is large; the milliammeter may then give a coarse indication (tens, hundreds, for example) and the electronic voltmeter a precise indication in this range.
  • D1, D2, D3 Drz are a series of detectors arranged in such a manner that when one of these detector becomes operative, an electrical current issued from a battery B flows through their corresponding resistors R1, R2, R3 Rn. All detectors D are connected in such a manner that when one of them becomes operative, it renders the device next to it in the series operative, and so on along the series.
  • the detectors may include, for example, relays in a sequential distribution, or valves, silicon controlled rectifiers, thyratrons, (hot or cold) and transistors. In fact any controllable device capable of delivering a predetermined amount of electrical current can be used.
  • FIGURE 3 shows a preferred Way of carrying out the invention with the use of silicon controlled rectifiers or solid state thyratrons.
  • D1, D2, D3, Dn are detectors in the form of sensing elements designed in such a manner that they can provide enough power to actuate the corresponding silicon controlled rectifiers, Q1, Q2, Q3, Qn, which are cathode loaded by resistors R1, R2, R3, Rn.
  • the next sensing element is excited and also actuates its rectifier, and so on to the last rectifier of the chain, in the direction towards the meter M.
  • each of the operative silicon controlled rectifiers will provide meter M with a current which is identical for each unit and therefore the current across M will be the sum of the currents of all those devices which have become operative.
  • the reading of M will permit immediate location of the initially operated detector.
  • detectors D1, D2, D3, Dn may be any suitable type of detecting element and Q1, Q2,'Q3, Qn may be any suitable type of silicon controlled rectifier or thyristor or any electrical or electronic bistable device (on-off) while R is essentially defined by the value of the full scale deflection ofthe pointer of M divided by the number of detecting units.
  • a remote identification system comprising a plurality of electronic circuit means each capable upon actuation of causing the flow of a similar increment of current, said plurality of means being coupled each to the next in a series such that actuation of any of one of said circuit means causes the actuation of the next following circuit means of the series, a plurality of condition sensing means each associated with and coupled electrically to a respective one of said circuit means for actuation thereof when the associated condition sensing means operates, a common conductor connected to all of the circuit means, and a current-amplitude responsive means connected to said common conductor for indicating the sum total of the increments of current caused to flow in the common conductor as a result of actuation of any of one circuit means by its associated condition sensing means with resultant actuation of all of the other following circuit means of the series.
  • each circuit means has a respective impedance in series therewith, the plurality of circuit means being all coupled in parallel across a current source.
  • a remote identification system as claimed in claim 2, wherein the circuit means are thyratrons.
  • a remote identification system as claimed in claim 2, wherein the circuit means are semiconductor devices.
  • a remote identification system as claimed in claim 1, wherein the current-value indicating device is an ammeter.
  • a remote identification system as claimed in claim 1, and a counter means connected to said common conductor and arranged to count the number of incremental changes of current value resulting from actuation of any one circuit means by its associated condition sensing means with resultant actuation of the other following circuit means of the series.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Alarm Systems (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
US682107A 1964-09-29 1967-11-13 Remote identification system Expired - Lifetime US3503067A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE653696A BE653696A (en:Method) 1964-09-29 1964-09-29
BE689837 1966-11-17

Publications (1)

Publication Number Publication Date
US3503067A true US3503067A (en) 1970-03-24

Family

ID=25656021

Family Applications (1)

Application Number Title Priority Date Filing Date
US682107A Expired - Lifetime US3503067A (en) 1964-09-29 1967-11-13 Remote identification system

Country Status (5)

Country Link
US (1) US3503067A (en:Method)
BE (1) BE689837A (en:Method)
DE (1) DE1283713B (en:Method)
GB (1) GB1201163A (en:Method)
LU (1) LU54679A1 (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732439A (en) * 1969-11-28 1973-05-08 N Calvin Pulse producing circuit particularly adapted for button type telephones
US3775761A (en) * 1971-04-15 1973-11-27 Nittan Co Ltd Fire detecting system with spurious signal rejection
US4001776A (en) * 1975-08-04 1977-01-04 General Motors Corporation Multiple indication display
US4095220A (en) * 1976-08-18 1978-06-13 Sadler Joe A Alarm detection and identification system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047843A (en) * 1957-02-15 1962-07-31 Rca Corp Monitoring circuits
GB923744A (en) * 1960-05-24 1963-04-18 Cie Constr Gros Mat Electromec Improvements in automatic defect signalling systems
US3109929A (en) * 1959-02-17 1963-11-05 Commissariat Energie Atomique Devices for the automatic monitoring of the variations of a physical magnitude at a multiplicity of distinct points and in particular for detecting can leaks in the channels of a heterogeneous nuclear reactor
US3147464A (en) * 1961-10-16 1964-09-01 Warren L Spielman First-out annunclator having input and supply control of indicator switching means
US3245066A (en) * 1962-03-23 1966-04-05 Int Standard Electric Corp Signalling system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE160097C (en:Method) *

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047843A (en) * 1957-02-15 1962-07-31 Rca Corp Monitoring circuits
US3109929A (en) * 1959-02-17 1963-11-05 Commissariat Energie Atomique Devices for the automatic monitoring of the variations of a physical magnitude at a multiplicity of distinct points and in particular for detecting can leaks in the channels of a heterogeneous nuclear reactor
GB923744A (en) * 1960-05-24 1963-04-18 Cie Constr Gros Mat Electromec Improvements in automatic defect signalling systems
US3147464A (en) * 1961-10-16 1964-09-01 Warren L Spielman First-out annunclator having input and supply control of indicator switching means
US3245066A (en) * 1962-03-23 1966-04-05 Int Standard Electric Corp Signalling system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732439A (en) * 1969-11-28 1973-05-08 N Calvin Pulse producing circuit particularly adapted for button type telephones
US3775761A (en) * 1971-04-15 1973-11-27 Nittan Co Ltd Fire detecting system with spurious signal rejection
US4001776A (en) * 1975-08-04 1977-01-04 General Motors Corporation Multiple indication display
US4095220A (en) * 1976-08-18 1978-06-13 Sadler Joe A Alarm detection and identification system

Also Published As

Publication number Publication date
LU54679A1 (en:Method) 1967-12-18
BE689837A (en:Method) 1967-05-02
GB1201163A (en) 1970-08-05
DE1283713B (de) 1968-11-21

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