EP0171459A1 - Système de surveillance - Google Patents

Système de surveillance Download PDF

Info

Publication number
EP0171459A1
EP0171459A1 EP84112390A EP84112390A EP0171459A1 EP 0171459 A1 EP0171459 A1 EP 0171459A1 EP 84112390 A EP84112390 A EP 84112390A EP 84112390 A EP84112390 A EP 84112390A EP 0171459 A1 EP0171459 A1 EP 0171459A1
Authority
EP
European Patent Office
Prior art keywords
monitoring system
sensor
switched
switch
alarm
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.)
Withdrawn
Application number
EP84112390A
Other languages
German (de)
English (en)
Inventor
Wilhelm Jank
Karl Schneider
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.)
Tele-Security-Foto Ueberwachungsanlagen GmbH
Original Assignee
Tele-Security-Foto Ueberwachungsanlagen GmbH
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 Tele-Security-Foto Ueberwachungsanlagen GmbH filed Critical Tele-Security-Foto Ueberwachungsanlagen GmbH
Priority to AU40223/85A priority Critical patent/AU4022385A/en
Publication of EP0171459A1 publication Critical patent/EP0171459A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1445—Mechanical actuation by lifting or attempted removal of hand-portable articles with detection of interference with a cable tethering an article, e.g. alarm activated by detecting detachment of article, breaking or stretching of cable
    • G08B13/1454—Circuit arrangements thereof
    • 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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/181—Prevention or correction of operating errors due to failing power supply

Definitions

  • the invention relates to a monitoring system with at least one sensor and a battery-powered control unit to which the sensor is connected and which has an arming switch for activating the signals from the sensor, an alarm transmitter which can be activated by the signals from the sensor, and a monitoring circuit for the battery voltage.
  • Monitoring systems of this type are mainly used for textiles.
  • the textiles are hung on stands or poles in the shops. Often there is no power supply available at these locations. Therefore, it is common to use a battery to power the monitoring system.
  • battery-operated monitoring systems it is important that the battery is loaded as little as possible in order to avoid frequent replacement of the battery.
  • To ensure the functionality of the system it is necessary to monitor the battery voltage.
  • To monitor the voltage circuits are required which are normally traversed by a continuous current and which in turn strain the battery. The monitoring circuit for the battery thus forms a weighty power consumer, which reduces the service life of the battery.
  • the invention has for its object to provide a monitoring system of the type mentioned, in which important functions with a power-saving Circuit are monitored and the failure of these functions is displayed.
  • the monitoring circuit for the battery voltage is controlled by the arming switch in such a way that it is normally switched off and is ready for operation for a limited period of time after the arming switch has been switched on and / or off.
  • the monitoring system there is no constant monitoring of the battery voltage. Rather, the monitoring of the battery voltage is only carried out when the arming switch is switched on or off, and only for a short period of time. While the logic circuits contained in the control device, which must be functional in the operating state, can consist of electronic components that have an extremely low quiescent current requirement, for example of semiconductor elements in C-MOS technology, the monitoring circuit of the battery voltage requires components that are larger Flow of electricity. This current flow is not maintained continuously, but is only switched on when the arming switch is actuated. In this way, the battery voltage is only monitored at certain times, so that the monitoring circuit only temporarily loads the battery. The monitoring system can therefore be operated with batteries of relatively low capacity (number of amperes).
  • a detection circuit for switching the arming switch on and / or off is expedient provided that controls an electronic switch of the monitoring circuit.
  • a monitoring system of the type described above in which the arming switch is switched off before an object is detached from its sensor, requires the arming switch to be switched on and off frequently. It can happen that after removing an object you forget to turn on the arming switch again.
  • a delay circuit is provided which generates an alarm after the arming switch has been switched off, if not within a defined period of time switched on again. This time span is dimensioned such that it is sufficient to remove an object from its sensor after the arming switch has been switched off and then to arm the monitoring system again.
  • a key detector which detects the presence of a key in a keyhole, is preferably provided on the arming switch in the form of a key switch and generates an alarm if the key is in the keyhole for longer than a predetermined period of time. This reminds personnel that the key is accidentally stuck in the key switch. Thieves are prevented from taking advantage of the situation that a key has been left in the key switch to disarm the surveillance system.
  • a memory that stores the sensor signal can be provided, which controls a separate signal light for this sensor.
  • the signal lights of all sensors are attached to the control unit. If one of the sensors has triggered an alarm, the relevant lamp on this sensor on the control unit can be used to immediately determine which sensor has triggered the alarm. When an alarm is triggered, it does not take long to find out which of the objects needs to be investigated.
  • the memories of all sensors can be reset by a reset signal generated when the arming switch is switched off and / or switched on.
  • the sensor that has responded and triggered an alarm is reset when the system is disarmed or the next time it is activated. As a result, the system is immediately ready for operation again, without manual reset having to take place specifically for the sensor in question.
  • the control device has a transmitter which transmits coded signals which identify the control device of the respectively activated sensor and that a receiver receiving the signals of the transmitter is provided, which is followed by a decoder for identifying the activated control device.
  • a monitoring system works with wireless transmission of the alarm signals from the control unit to the receiver.
  • the receiver controls a display device on which the control unit on which the alarm has been triggered is displayed.
  • the receiver is preferably mounted on the ceiling so that its reception area covers a large area of the room.
  • Several control units can be arranged on this surface.
  • the control units are located on clothes racks, for example. If an item of clothing suspended on such a clothes stand, which is secured with a sensor, is removed without authorization, the control unit responds and sends out the coded identification signal.
  • the visual and / or acoustic signal generation indicates to the staff that a control unit has generated an alarm, and the control unit or clothes rack on which the theft has occurred can be identified immediately by means of a numerical display.
  • the transmitters of the control units emit upwards and that the receiver is attached to the ceiling and its reception area is directed downwards.
  • the alarm is generated immediately when one of the sensors responds, thieves are killed unsure because they have not yet removed the stolen item from the sales stand. So the thief is not caught after the crime, but immediately after the crime.
  • Another advantage is that the alarm is generated optically and / or acoustically both on the control device in question, that is to say on the goods stand, and on the central receiver. The thief has the feeling that he has been recognized from different sides.
  • the receiver expediently controls a flash unit. It has been found that generating bright flashes of light has a strong deterrent effect on thieves.
  • the flash generation can additionally be coupled to the trigger mechanism of a camera, in the recording area of which the alarm-generating control device is arranged. In the event of an alarm triggering, the person who caused the alarm triggering is photographed.
  • the monitoring system After closing or at night, the triggering of flashes or acoustic warning tones does not make sense, because no one is in the business premises apart from the thieves. It is therefore advisable to switch the receiver at night to activate an alarm system.
  • alarm systems are usually installed in commercial buildings.
  • the monitoring system emits its alarm signals to such an existing alarm system, which is effective from the outside and has, for example, a connection to the police station.
  • the monitoring system is connected to the alarm system from the alarm system.
  • a plurality of sensors 10 are present in the monitoring system shown in FIG. 1. These sensors consist of clamps with two clamp legs 12, 13 which can be pivoted relative to one another about a joint 11, the ends of which are pressed against one another by a spring (not shown).
  • the end of one terminal leg 13 contains a microswitch 14 which opens a circuit when it is actuated.
  • the microswitch 14 is actuated when the fabric of a textile article is clamped between the ends of the clamp legs 12, 13. If the material is pulled out between the clamp legs, the ends of the clamp legs lie directly against one another without the switch 14 being actuated.
  • Each sensor can be attached to a different piece of clothing.
  • the monitoring system shown can be used, for example, to secure all items of clothing which are hanging on a clothes rack by sensors which are attached to them.
  • Each sensor 10 is connected via a cable 15 to the Control unit 16 connected.
  • the cable 15 is multi-core. For reasons of clarity, only one line is shown.
  • Each cable 15 is connected to the control unit via a plug connection 17. If the circuit is interrupted by the microswitch 14, a set signal is applied to the set input S of a memory 18, in the present case a flip-flop. In this way, the fact that the microswitch 14 has been opened is kept stored in the memory 18, even if the microswitch 14 was subsequently closed again.
  • the output Q of the memory is connected to an input of an AND gate 19, the other input of which is also connected to the arming switch 20. If the monitoring system is armed, as in the position of the arming switch 20 shown in the drawing, the switching condition of the AND gate 19 is fulfilled as soon as the memory 18 is set.
  • each AND gate 19 serves as a control signal for a signal generator 21 which generates square-wave pulses with a predetermined duty cycle.
  • the signal generator 21 controls a tone frequency generator 22 which is connected to a buzzer 23 or loudspeaker. All signal generators 21 are connected to a common tone frequency generator 22 and all signal generators 21 have a different pulse duty cycle or different pulse durations, so that the signals generated by the individual signal generators 21 produce different sequences of tones and interruptions. In this way it is possible to acoustically identify the sensor that has responded.
  • the output Q controls everyone Memory 18, a light emitting diode 24 which lights up as long as the memory 18 is set.
  • All memories 18 are reset when the arming switch 20 is switched off or when this arming switch 20 is switched on again. Then a short pulse is given to the reset inputs R of all memories 18 via an RC element 25, which is connected to the arming switch 20.
  • the output of the arming switch 20 is also connected to the control input of a further signal generator 28 via an inverter 26 and a delay circuit 27, which causes a delay D 1 of, for example, 10 s.
  • the signal generator 28 controls a tone frequency generator 29 which can also excite the buzzer 23.
  • the circuits 26 to 29 serve to generate an intermittent acoustic signal if, after the arming switch 20 has been switched off, the arming switch 20 is not switched on again within a period of time that is longer than the running time of the delay element 27. Each time an object to which a sensor 10 is attached is sold, the seller switches off the arming switch 20, detaches the relevant sensor 10 from the object and then switches on the arming switch 20 again.
  • the circuits 27 to 29 cause an alarm if the activation of the arming switch fails to occur.
  • a logic "1" signal means positive voltage and a logic “0" signal means a voltage close to zero.
  • the contacts of a key detector 20 ' are connected in parallel with the contacts of the switch 20.
  • the key detector 20 ' is a switch that detects the presence of the key required for arming in the keyhole. When the key is in the keyhole, the switch is placed in a position where positive voltage is applied to the switch arm. If there is no key in the keyhole, the key detector 20 'assumes its rest position, in which its switching arm is grounded.
  • the switching arm of the key detector 20 is connected to a delay element 27 ', which has a delay time D 2 which is less than the delay time of the delay circuit 27 and is, for example, 3 s.
  • the output of the delay element 27 ' is connected to the input of the signal generator 28.
  • the key detector 20 ' in conjunction with the timer 27', serves to ensure that the key does not remain in the keyhole for longer than a certain period of time. If it has been forgotten to remove the key, an alarm signal is generated when the timer 27 'has expired. While the key switch 20 reacts to the actuation of the key and remains in the respectively set state when the key is subsequently removed, the key detector 20 'reacts to the presence of a key in the keyhole and it automatically returns to its rest position shown in FIG. 1 back.
  • the monitoring circuit 31 which is connected to the battery voltage, contains a series circuit comprising a resistor 32 and a zener diode 32.
  • the zener diode 32 is an element at which a constant voltage drop always occurs within certain limits, regardless of the level of the battery voltage.
  • other voltage-stabilizing elements can also be used, for example a series circuit comprising a plurality of diodes, a glow lamp or the like.
  • a voltage divider consisting of the resistors 34 and 35.
  • the taps of the series circuit 32, 33 and of the voltage divider are connected to the inputs of a comparator 36, which provides a signal at its output when the voltage at the tap of the voltage divider has become lower than the voltage of the zener diode 33.
  • the voltage at the tap of the voltage divider 34, 35 is proportional to the battery voltage, while the voltage of the zener diode 33 can be regarded as constant.
  • the Zener diode 33 and the resistor 35 are connected via a switch 37 in the form of a transistor with ground potential. The monitoring circuit only works when the transistor 37 is conductive.
  • the monitoring circuit 31 does not supply an output signal.
  • the signal from the monitoring circuit 31 is fed to a timing element 38, which has a duration of approximately 5 s and whose output signal controls the audio frequency generator 39.
  • the timer 38 When the battery voltage has dropped below the allowable minimum is, the timer 38 generates a warning signal on the buzzer 23 via the tone frequency generator 39 for a period of 5 s.
  • the switch 37 is controlled by the detection circuit 40 as a function of the activation of the arming switch 20.
  • the arming switch 20 is via a differentiating circuit with ground potential consisting of the capacitor 41 and the resistor 42 and via a capacitor 43 and the resistor 44 existing second differentiating circuit connected to the positive pole of the battery 30.
  • a resistor 45 is connected in parallel with a diode 45 for short-circuiting negative voltages to ground potential and a resistor 46 is connected in parallel with a diode 46, by means of which positive pulses are short-circuited to the positive pole of the battery 30.
  • the tone generators 22, 29 and 39 differ in their tone frequencies, so that the events which trigger the alarm can be distinguished acoustically.
  • the sensors 10 can be identified by their different tone sequence frequencies or duty cycles.
  • the outputs of all AND gates 19 are connected to the inputs of an encoder 51 which, when one of the sensors 10 has responded, emits a pulse train via an LED 52.
  • the light emitting diode 52 emits electromagnetic waves in the infrared range.
  • the encoder 51 generates pulses according to a certain pulse pattern, so that on the receiver 53, which receives the infrared signals, the control device 16 can be determined on the basis of the pulse pattern that the pulses have emitted. This determination is made by the decoder 54 connected downstream of the receiver 53.
  • the decoder 54 controls a display device 55 on which the number of the control unit which has given the alarm is displayed in digits.
  • a flash device 56 is actuated, which emits one or more flashes of light.
  • a camera 57 can be operated simultaneously with the flash trigger to take a photographic image of the area in which the control device is installed.
  • Fig. 2 shows a perspective view of the monitoring system in a textile shop.
  • Garments 58 are hung on stands 59 and presented for sale.
  • the plug of cables can be inserted into the plug connector 17.
  • At the ends of each cable there is a sensor 10 in the form of the pliers described with reference to FIG. 1.
  • At the top of the housing one or two outlet openings 66 are provided, through which the radiation of a light-emitting diode 52 emerges from the housing.
  • the housing of the control device 16 is plate-shaped and is arranged coaxially on the stand 59, which is a round stand with a circular hanging rail 61 for the items of clothing.
  • the stand 59 shown on the right in FIG. 2 has straight suspension rods 62, and the control device 16 is accommodated in an elongated housing which extends horizontally along the upper end of the stand 59.
  • the receiver 53 is accommodated together with the decoder 54 in a housing 63 which is mounted depending on the ceiling of the room.
  • the infrared eye 64 of the receiver is located on the underside of the housing 63.
  • control units 16 emits 16 infrared alarm pulses, these are collected and evaluated by the receiver 53.
  • Attached to the housing 63 is the display device 55, on which the number of that stand is indicated by an illuminated display, at which a sensor 10 has responded. Flash lamps 56 are attached along the lower edges of the housing 63 and emit flashes of light when an alarm is triggered.
  • Each transmitter expediently sends out pulses at regular time intervals which are recognized by the receiver 53 and which are not alarm pulses. In this way it is determined whether the radiation connection between the transmitter and the receiver is interrupted or whether one of the transmitters or the receiver has been covered. In this case, a warning signal can be generated.
  • the receiver 53 is attached to the ceiling and connected via a cable 65 to the elements 55, 56 and 57 attached to the lateral boundary wall of the room or to a column.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Burglar Alarm Systems (AREA)
EP84112390A 1984-06-15 1984-10-13 Système de surveillance Withdrawn EP0171459A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40223/85A AU4022385A (en) 1984-06-15 1985-03-21 Alarm monitor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843422225 DE3422225A1 (de) 1984-06-15 1984-06-15 Ueberwachungssystem
DE3422225 1984-06-15

Publications (1)

Publication Number Publication Date
EP0171459A1 true EP0171459A1 (fr) 1986-02-19

Family

ID=6238411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112390A Withdrawn EP0171459A1 (fr) 1984-06-15 1984-10-13 Système de surveillance

Country Status (4)

Country Link
EP (1) EP0171459A1 (fr)
JP (1) JPS6134692A (fr)
CA (1) CA1242012A (fr)
DE (1) DE3422225A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658639A1 (fr) * 1990-02-20 1991-08-23 Etie Sa Systeme de protection electronique contre le vol d'objets.
EP0529627A1 (fr) * 1991-08-30 1993-03-03 Sanyo Electric Co., Limited. Générateur d'alarme sonore dans un ordinateur
FR2685524A1 (fr) * 1991-12-18 1993-06-25 Koune Bernard Dispositif pour proteger contre le sol des objets en exposition dans les commerces et les locaux industriels, ou ouverts au public.
DE19512567C1 (de) * 1995-04-04 1996-07-11 Reinhold Ott Diebstahlsicherungsvorrichtung
US5910768A (en) * 1995-04-04 1999-06-08 Ott; Reinhold Anti-theft device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6329894U (fr) * 1986-08-11 1988-02-26

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854434A1 (de) * 1978-12-16 1980-06-19 Burkhard Zuelow Diebstahlsicherungseinrichtung fuer insbesondere verkaufsgegenstaende
DE3109577A1 (de) * 1981-03-13 1982-10-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur funktions- und batteriekontrolle elektronischer sicherheitseinrichtungen
DE3302459A1 (de) * 1982-05-07 1983-11-10 Reinhold 7000 Stuttgart Ott Diebstahlsicherung fuer ausgestellte waren
DE3300560A1 (de) * 1983-01-10 1984-07-19 Burkhard 4052 Korschenbroich Zülow Diebstahlsicherungseinrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6649874A (en) * 1973-03-14 1975-09-11 Steven Grant Marshall Alarm system
DE3046895C2 (de) * 1980-12-12 1982-09-23 Gerald 8021 Taufkirchen Kampel Verschüttetensuchgerät, insbesondere für die Verwendung bei der Suche nach Lawinenverschütteten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854434A1 (de) * 1978-12-16 1980-06-19 Burkhard Zuelow Diebstahlsicherungseinrichtung fuer insbesondere verkaufsgegenstaende
DE3109577A1 (de) * 1981-03-13 1982-10-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur funktions- und batteriekontrolle elektronischer sicherheitseinrichtungen
DE3302459A1 (de) * 1982-05-07 1983-11-10 Reinhold 7000 Stuttgart Ott Diebstahlsicherung fuer ausgestellte waren
DE3300560A1 (de) * 1983-01-10 1984-07-19 Burkhard 4052 Korschenbroich Zülow Diebstahlsicherungseinrichtung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658639A1 (fr) * 1990-02-20 1991-08-23 Etie Sa Systeme de protection electronique contre le vol d'objets.
EP0529627A1 (fr) * 1991-08-30 1993-03-03 Sanyo Electric Co., Limited. Générateur d'alarme sonore dans un ordinateur
US5448748A (en) * 1991-08-30 1995-09-05 Sanyo Electric Co., Ltd. Computer with alarm sounding apparatus having selectable output
FR2685524A1 (fr) * 1991-12-18 1993-06-25 Koune Bernard Dispositif pour proteger contre le sol des objets en exposition dans les commerces et les locaux industriels, ou ouverts au public.
DE19512567C1 (de) * 1995-04-04 1996-07-11 Reinhold Ott Diebstahlsicherungsvorrichtung
US5910768A (en) * 1995-04-04 1999-06-08 Ott; Reinhold Anti-theft device

Also Published As

Publication number Publication date
CA1242012A (fr) 1988-09-13
JPS6134692A (ja) 1986-02-18
DE3422225A1 (de) 1985-12-19

Similar Documents

Publication Publication Date Title
EP0646265B1 (fr) Procede et installation pour assurer la securite de personnes ou d'objets
DE60116965T2 (de) Verbindbarer Detector mit lokaler Alarmanzeige
DE4137010A1 (de) Als raumueberwachungsvorrichtung ausgebildeter waren-, dienstleistungs- oder gluecksspielautomat
EP0116701B1 (fr) Dispositif antivol
DE60020176T2 (de) Warnungsystem
EP0171459A1 (fr) Système de surveillance
DE3834538C1 (en) Electronic control device on a control board for controlling a magnetic and/or electromechanical locking device for doors
DE2500759A1 (de) Brandschutzanlage
DE3410888C1 (de) Überwachungsanlage
DE2636099A1 (de) Verfahren zur ueberwachung und sicherung von fahrzeugen und vorrichtung zur durchfuehrung des verfahrens
DE19613414A1 (de) Elektronisches Artikelüberwachungssystem mit Alarmgeber
DE3437460C2 (de) Warensicherungsleiste
DE19503732C2 (de) Diebstahlsicherungsvorrichtung für elektrische Geräte und Maschinen
EP0021232A1 (fr) Installation d'alarme contre l'intrusion
EP2064685B1 (fr) Procédé et équipement pour l'identification d'un avertisseur de danger
DE19507096A1 (de) Vitrine mit Diebstahlsicherung
DE3809752C2 (fr)
DE3501884A1 (de) Einbruchsicherungsanlage
DE4423171A1 (de) Vorrichtung zum Scharfschalten und zum zwangsläufigen Unscharfschalten einer Alarmanlage
DE9102114U1 (de) Anordnung zur Alarmauslösung bei Einbruchsversuchen
DE19655316C5 (de) Zentraleinheit für eine Anlage zur Sicherung von Waren gegen Diebstahl
DE3715631A1 (de) Diebstahl-sicherungsanlage fuer kraftfahrzeuge
DE1616021C (fr)
DE3842053A1 (de) Schaltung fuer die ueberwachung von mit gleichstrom betriebenen elektronischen alarmanlagen mit einer meldelinie
DE19518752A1 (de) Diebstahlsicherungsanlage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860606

17Q First examination report despatched

Effective date: 19871002

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880413

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JANK, WILHELM

Inventor name: SCHNEIDER, KARL