US3430199A - Teleidentification system for monitoring a plurality of points - Google Patents

Teleidentification system for monitoring a plurality of points Download PDF

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Publication number
US3430199A
US3430199A US406388A US3430199DA US3430199A US 3430199 A US3430199 A US 3430199A US 406388 A US406388 A US 406388A US 3430199D A US3430199D A US 3430199DA US 3430199 A US3430199 A US 3430199A
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United States
Prior art keywords
relay
detector
detectors
voltage
electronic
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Expired - Lifetime
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US406388A
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English (en)
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Abel Boris Amiragoff
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Individual
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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

Definitions

  • the alarm supplied by most of these detector devices is generally transmitted to one or more centralisation boards where it operates either relay devices, visual signals, bells or other acoustic systems, recording devices or measuring devices and, in certain cases, sets in operation automatic remedial or correcting apparatus.
  • the object of the present invention is to provide an improved construction of remote identification system wherein the use of individual wiring of each detector to control point is avoided, and wherein extremely rapid location of any one of a large number of detectors can be obtained.
  • a remote identification system comprises a plurality of detectors each adapted to actuate a respective electronic relay circuit capable of producing a signal by discharge of a condenser, the plurality of circuits being coupled in a series such that the actuation of each such circuit causes the actuation of the next circuit of the series, a signal counting device, and a comon line connecting all of the circuits to the counting device to convey to the counting device the signals produced in said circuits.
  • the signals are produced by electronic means, as distinct from signal-forming means including electro-mechanical devices, the production of the series of signals can be extremely rapid, so that the system can be readily adapted for use with many hundreds or even thousands of detectors, and the location of the operated detector ascertained in a very short time.
  • the counting means may incorporate an electromechanical counter, but for more rapid counting than can be obtained with such a counter, an electronic counter of conventional nature may be used.
  • each relay circuit comprises a first electronic relay triggered by a detector element, and a second electronic relay triggered by the first relay and arranged to cause discharge of the condenser to produce a signal.
  • the counting device comprises a pulseforming unit for actuation by the signals received from the common line, and an electromechanical counter actuated by the pulses of the pulse-iorming unit.
  • the counting device comprises an electronic counter for actuation by the signals.
  • D D are the first two of a series of automatic supervision or detection devices, such as fire-, theftor proximity-detectors, or any general supervision devices.
  • Each of these detectors operates a relay in the form of a cold cathode tube V which is normally non-conductive.
  • each detector is fed from a voltage source A via a relay contact K
  • Each detector is associated with a respective electronic relay including a cold cathode tube V
  • a voltage source A feeds the anodes of V of all the units via a switch I and I and M-E represents a pulseshaping amplifier.
  • This amplifier is characterised by the fact that impulses of variable duration or amplitude, applied to its input, emerge with standardised amplitude, duration and form from its final stage, in order to act on a meter-amplifier unit AC.
  • This amplifier supplies the power required for the operation of the numerical counter relay 1,, and the relay actuating the contact K
  • the relay I counts one unit, while the relay operating K opens, disconnecting the voltage source A from all of the detectors, for a period equal to the duration of the impulse plus an additional period such that the total period is at least equal to the time required for two successive impulses to occur at the input of A-C.
  • V is a first cold cathode tube, of which the starter E is connected to the sensitive element of the detector.
  • the second cold cathode tube V is fed from the independent voltage source A
  • the anode of V is directly connected to this second supply unit, while the starter of this same tube is connected to a voltage divider consisting of the resistances R R and R in such a way that the permanent voltage present in the starter of V is defined by the following equation:
  • V is the voltage in the starter, in the absence of any signal on E of V and V is the rated feed voltage supplied by A Under these conditions, the starter voltage of V is insufiicient to ignite this tube.
  • the voltage drop across R modifies the distribution of the voltages in the potentiometer chain R R and R the voltage of the starter of V suddenly increases and the tube ignites.
  • a voltage, the product of the current flowing in V and the resistance R occurs between the cathode of this tube and earth, and is in turn applied via a condenser C to the starter of the tube V of the next unit of the series and causes its ignition; this in turn causes ignition of the tube V of the next tube, and so on for the whole series.
  • each tube V is associated with a condenser C a resistance R; and a diode Z and the impulses from all the units are fed along a common line A-B to a resistance R preceding the impulse-forming stage M ⁇ E.
  • the tube V can be connected to V by means of a capacitative coupling.
  • the resistance R is returned to earth and the cathode of V connected to the starter of V by a suitably dimensioned condenser.
  • the insertion of the condenser C between the starter and cathode of each of the series of tubes V makes it possible to produce at these cathodes an alternating voltage which is superimposed on the direct voltage between cathode and earth of these tubes in the ignition state, and to obtain, in addition to the identification impulse, an alternating signal which can be used for all amplification purposes and for other control and verification purposes.
  • This alternating signal can be fed in through a condenser C or via a transformer, not shown.
  • the system shown contains an electro-mechanical counting relay and an electromagnetic relay having the contact E
  • the system can be rendered entirely non-mechanical by using cold cathode electronic meters, for example, in which the number of impulses received can be indicated by neon tubes, digital counting electronic tubes, dekatrons, trochotrons or strobotrons.
  • Facilities may be provided for precounting, i.e., for closing secondary circuits when a preselected quantity has been counted, which, in cases such as the detection of fire, enables automatic fire extinguishing devices to be put into operation.
  • the first detection impulse may be used for the blocking of hot cathode thyratrons or cold cathode gas relays, or of solid thyratrons (controlled rectifiers, as they are termed in English-speaking countries), which eliminates the feed voltage of the detectors.
  • the detectors of the series are all placed out of action immediately a first detector has been operated, so that there cannot be any interference to the succession of signals by the subsequent operation of another detector very shortly after the operation of the first detector;
  • an alarm can be operated immediately upon formation of the first signal, e.g., by adding another pair of contacts on the relay K (v) as the relay circuits are entirely electronc and do not include electromechanical items, the production of the series of signals can be extremely rapid, which is of particular importance when many hundreds or even thousands of detectors may be connected to a single common line; this is of course particularly the case where the counting device is also an electronic device rather than an electromechanical device.
  • a remote identification system comprising a plurality of electronic relay circuits capable upon actuation of producing a signal by discharge of a condenser, said plurality of circuits being coupled each to the next in a series such that actuation of any one of said circuits causes the actuation of the next following circuit of the series, a plurality of detectors each coupled electrically to a respective one of the relay circuits for actuation thereof when the detector operates, a common conductor connected to all of the relay circuits, and a counting device connected to said conductor for counting the number of signals received as a result of actuation of any relay circuit by the associated detector.
  • each relay circuit comprises a first electronic relay coupled to the associated detector so as to be triggered when the detector operates, a condenser and an associated charging circuit, and a second electronic relay coupled to the first relay and to the condenser for causing discharge of the condenser when triggered by the first relay.
  • a remote identification system as claimed in claim 1, comprising means connected to the common conductor and to the plurality of electronic relay circuits and adapted upon reception of a signal to prevent, for a duration at least equal to the time required for two successive signals to be generated, the subsequent actuation of an electronic References Cited relay circuit by its associated detector.
  • a remote identification system as claimed in claim UNITED STATES PATENTS 1, wherein the counting device comprises a pulse-forming 2,682,046 6/1954 Win 340-363 unit coupled to the common conductor for actuation by 5 3,257,658 6/1966 Lloyd 340-324 XR sigrtials relcei'vedlfrom the 1giluralilty of etlectronic1 rglztzy FOREIGN PATENTS cm s, an an eec ro-mec amca coun er coup e o e pulse unit for counting the pulses emitted by said unit. 240360 8/1962 Austmha' 5.
  • the counting device is an electronic counter 10 coupled to the common conductor.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Burglar Alarm Systems (AREA)
US406388A 1963-11-05 1964-10-26 Teleidentification system for monitoring a plurality of points Expired - Lifetime US3430199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU44754 1963-11-05

Publications (1)

Publication Number Publication Date
US3430199A true US3430199A (en) 1969-02-25

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ID=19723548

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US406388A Expired - Lifetime US3430199A (en) 1963-11-05 1964-10-26 Teleidentification system for monitoring a plurality of points

Country Status (5)

Country Link
US (1) US3430199A (fr)
CH (1) CH446130A (fr)
FR (1) FR1420443A (fr)
GB (1) GB1081974A (fr)
LU (1) LU44754A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846794A (en) * 1973-03-15 1974-11-05 Baker Ind Inc Alarm retransmission system
FR2455328A1 (fr) * 1979-04-24 1980-11-21 Deschaume Patrick Elements autonomes d'un dispositif d'alarme ou de protection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE89444T1 (de) * 1988-07-16 1993-05-15 Honeywell Ag Dialogsystem.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682046A (en) * 1950-08-04 1954-06-22 Schenck Gmbh Carl Pulse producing control apparatus
US3257658A (en) * 1962-07-31 1966-06-21 Bell Punch Co Ltd Calculating machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682046A (en) * 1950-08-04 1954-06-22 Schenck Gmbh Carl Pulse producing control apparatus
US3257658A (en) * 1962-07-31 1966-06-21 Bell Punch Co Ltd Calculating machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846794A (en) * 1973-03-15 1974-11-05 Baker Ind Inc Alarm retransmission system
FR2455328A1 (fr) * 1979-04-24 1980-11-21 Deschaume Patrick Elements autonomes d'un dispositif d'alarme ou de protection

Also Published As

Publication number Publication date
LU44754A1 (fr) 1965-05-05
FR1420443A (fr) 1965-12-10
CH446130A (fr) 1967-10-31
GB1081974A (en) 1967-09-06

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