EP0304045B1 - Elektrozaungerät - Google Patents

Elektrozaungerät Download PDF

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Publication number
EP0304045B1
EP0304045B1 EP88113379A EP88113379A EP0304045B1 EP 0304045 B1 EP0304045 B1 EP 0304045B1 EP 88113379 A EP88113379 A EP 88113379A EP 88113379 A EP88113379 A EP 88113379A EP 0304045 B1 EP0304045 B1 EP 0304045B1
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EP
European Patent Office
Prior art keywords
pulse
electric
pulse generator
voltage
energy storage
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
Application number
EP88113379A
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German (de)
English (en)
French (fr)
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EP0304045A1 (de
Inventor
Wilhelm Weinreich
Heinrich Schmidt
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.)
Horizont Geraetewerk GmbH
Original Assignee
Horizont Geraetewerk GmbH
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Filing date
Publication date
Application filed by Horizont Geraetewerk GmbH filed Critical Horizont Geraetewerk GmbH
Priority to EP90109787A priority Critical patent/EP0390227B1/de
Publication of EP0304045A1 publication Critical patent/EP0304045A1/de
Application granted granted Critical
Publication of EP0304045B1 publication Critical patent/EP0304045B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
    • H05C1/00—Circuits or apparatus for generating electric shock effects
    • H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages

Definitions

  • the invention relates to an electric fence device for generating pulses, which contains at least two simultaneously operable pulse generators connected to the same electric fence, each of the two pulse generators determining the energy content of the electrical pulse from the respective pulse generator placed on the electric fence, complete vibration system, each with a pulse transformer, each an energy storage capacitor and one each the energy storage capacitor for discharging via the primary winding of the pulse transformer switching switching element.
  • an electric fence device which contains at least two pulse generators which are connected to the same electric fence.
  • One of these pulse generators is switched on in normal operation, while the activation of a second or further pulse generator only takes place when the given load conditions on the electric fence necessitate increased pulse application.
  • an electric fence device in which two identical pulse generator circuit arrangements are provided, one of which is connected to the electric fence via a high-voltage diode and the other via an ohmic resistor as an additional impedance and a high-voltage diode are.
  • the purpose of this arrangement is to generate pairs of pulses on the electric fence.
  • the peak voltage of each pair's pulse is much more dependent on the fence load than the pulse directly on the fence.
  • the comparison of the two impulses of each pair gives a statement about the current load on the fence.
  • a pulse generator is known from EP-A-0 036 089, in which, by mutual coordination, the parameters of the vibration system given by the energy storage capacitor, pulse transformer and fence capacitance are used as
  • the weak pulse of energy used is caused by the transient response of the vibration system, whereby this pulse, which is conducted via the leakage inductance of the pulse transformer, depends to a very large extent on the current fence load and serves to prematurely stop the development of an energy-intensive pulse from the main vibration of the vibration system when the fence load is low or to allow the development of the high-energy impulse from the main vibration at higher fence loads.
  • the aim of this pulse generator is to significantly reduce the energy consumption for the operation of the energizer. Mutual amplification of the key pulse and the main pulse is neither sought nor achieved.
  • an electric fence device in which a single pulse generator circuit arrangement is provided, and from this circuit arrangement a flat post-pulse following the generated pulse is to be derived in order to thereby increase the pulse duration.
  • the aim is to increase the energy content of the impulses given to the electric fence somewhat while circumventing existing safety regulations, whereby a solution known from DE-B-1 514 726 for dressage devices is assumed. In such dressage devices, which are attached directly to the body of the animal to be trained, the pulse width and thus the shock effect of the pulse should be increased by a subsequent pulse of lower voltage.
  • the invention is concerned with the problem that in electric fence devices a limit has been reached with regard to the energy given to each electric fence pulse, and yet, under unfavorable conditions in the interest of safety, even higher energy in each pulse would be desirable.
  • the amount of energy given to the electrical impulses approaches in the case of unfavorable conditions, the hazard limit for humans and animals, so that a significant increase in the pulse energy should no longer be considered in such devices.
  • the energy content of the impulses is limited by the amount of energy available in a dry battery or an accumulator, which should be sufficient for the longest possible period of time during operation of the energizer, preferably over an entire herding period.
  • an energizer could be equipped with two pulse generators, the first of which as in EP-A-0 251 820 or EP-A-0 179 435 is designed for normal operation of the electric fence and, in contrast to EP-A-0 251 820 or EP-A-0 179 435, the second one is designed to be considerably stronger than the first pulse generator and could be switched on as an amplifier if the electrical load on the electric fence , in particular a drop in the fence insulation exceeds the performance of the first pulse generator. In such a case, it would either exceed the risk limit mentioned above or, in the case of electric energizers operated from a battery, a battery of such a size would be required which is inadequate in terms of manageability and price for such electric energizers.
  • the first pulse generator with a vibration system for generating electrical high-voltage pulses with a longer pulse duration and the second pulse generator with a vibration system for generating high-voltage pulses with a significantly shorter pulse duration are provided, the vibration system of the second pulse generator having a much lower internal impedance than that Vibration system of the first pulse generator is formed, and that control devices are provided for the two vibration systems, with which either a pulse of the first pulse generator and the second pulse generator can be triggered in the desired mutual temporal order, such that the pulse of the second pulse generator by ionization creates electrical conduction path for the pulse of the first pulse generator.
  • the invention is based on the consideration that
  • the high-energy pulse generated by the first pulse generator with a high R-load (reduced insulation) of the electric fence is greatly reduced in its peak voltage, but still has essentially sufficient energy content for the irritant effect of an electric shock. Only the reduced peak voltage no longer triggers the irritant effect of the electric shock with certainty.
  • the second pulse generator generates narrow, low-energy, needle-shaped electrical pulses.
  • the needle-shaped, low-energy pulses of the second pulse generator have a significantly lower peak voltage than the conditions prevailing at the electric fence , especially sensitive to fence insulation.
  • the first pulse generator contains devices (recovery diode) for energy recovery, the secondary winding of the pulse transformer in the first pulse generator directly and the secondary winding of the pulse transformer in the second pulse generator via a high-voltage diode on the electric fence are connected.
  • the oscillation system in the first pulse generator can be designed according to the invention for the generation of high-energy electrical pulses of greater pulse duration with an energy storage capacitor and its charging circuit for receiving and converting a multiple amount of energy like the oscillation system of the second pulse generator.
  • the vibration systems of both pulse generators are designed to charge their energy storage capacitors to the same electrical voltage, while the electrical capacitance of the energy storage capacitor in the first pulse generator is significantly larger than the electrical capacitance of the energy storage capacitor in the second pulse generator.
  • the electrical capacitance of the energy storage capacitor in the first pulse generator can be between approximately twice to 10 times the electrical capacitance of the energy storage capacitor in the second pulse generator. Since the mutual inductance of the pulse transformer is also determined for the frequency of the electrical oscillation generated in the oscillation system, a pulse transformer can also be provided in the second pulse generator that is significantly lower than in the first pulse generator.
  • the oscillation system in the first pulse generator it is also possible to design the oscillation system in the first pulse generator to charge its energy storage capacitor to a higher electrical voltage than the oscillation system in the second pulse generator. Since the electrical energy contained in the energy storage capacitor is dependent on the square of the electrical voltage applied to the energy storage capacitor, the electrical energy absorbed by the energy storage capacitor and converted in the vibration system can also be adjusted in this way. However, since the pulse width depends on the frequency of the electrical vibrations generated in the vibration system and this in turn on the mutual inductance, a pulse transformer in the second pulse generator would have to be much lower than in the second pulse generator first pulse generator can be used.
  • the pulse transformer and the second pulse generator can also be designed with a close electrical coupling between its primary winding and its secondary winding and only a small scattering factor.
  • a particularly useful embodiment of the electric fence device can provide, for example, that the vibration system of the first pulse generator for generating electric pulses with a low R load (fence insulation 5000 ⁇ and more) of the electric fence peak voltage at about 4000 V to 7000 V and temporal pulse width at about 100 ⁇ s is formed, while the vibration system of the second pulse generator for the generation of electrical pulses with peak voltage at about 3000 V to 5000 V and pulse width at about 5 ⁇ s to 10 ⁇ s both with low R-load (fence insulation 5000 ⁇ and more) than even with medium and high R-load (fence insulation below 5000 ⁇ to below 500 ⁇ ).
  • the output of the pulse generator for pulses of e.g.
  • 100 ⁇ s temporal pulse width is a block for the vibrations for pulses of approximately 5 to 10 ⁇ s temporal pulse width in the manner of a low-pass filter.
  • the pulse generator designed for the narrow pulses that is to say of the second pulse generator
  • the output of the first pulse generator can be connected directly to the electric fence and thereby enables the use of conventional energy recovery devices within the first pulse generator.
  • the possibility, at least in the oscillation system for the generation of wider, energy-loaded pulses, before the actual energy-loaded pulse, to generate a transient process in connection with the invention has the particular importance that the transient process is not only dependent on the load condition, as in DE 30 09 838 C2 of the electric fence either prevents or permits the development of the subsequent energy-laden pulse, but additionally gives the possibility of also acting on the control devices of the overall generator in such a way that, depending on the desired setting on these control devices, the transient process can also suppress the generation of the narrower high-voltage pulses.
  • the generator according to the invention can be designed to be particularly energy-saving.
  • the high-voltage pulse of shorter pulse duration should preferably only be switched on when the fence load reaches a certain resistance value has fallen below, e.g. with fence insulation below 5 k ⁇ .
  • the energy-loaded impulses with a longer pulse duration are naturally more strongly damped with ohmic fence loading than narrow or very narrow high-voltage impulses. This means that the peak voltage of the wide, energy-laden pulse decreases with decreasing fence insulation up to about 100 V with, for example, 500 ⁇ insulation resistance.
  • the very narrow impulse of the other systems determines the voltage level with decreasing insulation resistances of the electric fence, since it remains practically undamped, with the result that a broad basic pulse of low height and a narrow, high needle pulse occur at, for example, 500 ⁇ insulation resistance.
  • control devices for the oscillation systems can be designed to actuate the oscillation system for generating a narrow pulse at the point in time for generating a narrow pulse if the wider pulse generated by the other oscillation system is at the voltage maximum or in the vicinity thereof . In this way the optimal interaction of the two different impulses is guaranteed. If the oscillation system for the narrow pulses is normally kept out of operation in the context of the invention, the control devices for the oscillation systems are to be designed to continuously determine the electrical fence load or the electrical insulation resistance of the fence against earth and if the insulation resistance falls below a threshold value (e.g. 5 k ⁇ ) to put the vibration system into operation for the generation of narrow pulses.
  • a threshold value e.g. 5 k ⁇
  • the narrow high-voltage pulse is to be triggered first after the first pulse triggering the control, a change in timing for the next pair of pulses should be carried out within the scope of the invention take place that the high voltage pulse is combined with the energy-laden broad pulse.
  • the control devices for the vibration systems can be designed according to the invention to immediately trigger such a narrow high-voltage pulse even after the broader energy-laden pulse has expired when the vibration system for narrow high-voltage pulses is started, and to trigger the next pulse combination for delivery of the narrow pulse To set up the high voltage pulse in the area of the voltage maximum of the broader energy-loaded pulse.
  • the second single pulse i.e. the narrow high-voltage pulse
  • the narrow high-voltage pulse is shifted in time for the next periodic double pulse so that it is placed on the energy-laden single pulse, preferably on the apex or in the vicinity thereof.
  • it can also occur in the initial phase of the broad energy-laden impulse. Only in this constellation can the two individual impulses ideally complement each other and lead to completely new practical effects on the fence under vegetation or in contact with animals.
  • the narrow, needle-shaped pulse of high voltage clears the way as a pure ignition pulse or creates an electrical conduction path for the high-energy main pulse through ionization. The latter can now come into full effect again despite unfavorable fence conditions and low internal stress; it is "triggered", so to speak, and thus practically independent of the fence condition.
  • the invention offers the possibility of carrying out a meaningful fence check without any significant additional expense, in that the activation of the second pulse is indicated optically or acoustically.
  • Conventional electric fence devices of this type no longer reveal any serious changes in the condition of the fence.
  • the energizer has a power supply part 1, which the incoming supply voltage, i.e. converts the DC voltage of the battery and ensures a suitable supply for the downstream modules.
  • a DC-DC converter 2 connects to the power supply part 1 and converts the generally low supply voltage of the battery (DC voltage 6 V, 9 V or 12 V) into a DC voltage of, for example, 350 V to 400 V.
  • the latter is connected to a control module 3.
  • the electric fence device also contains an evaluation unit 4 and a clock generator 5 for the two pulse generators 6 and 7.
  • An electric fence is connected to the two pulse generators 6 and 7, which is replaced by a low R-load (vegetation-free state without animal contact) electrical capacitor 8 is shown.
  • the capacitance of the electrical capacitor 8 is assumed to be 10nF per 1 km of fence length. If there is a medium R load (reduction of the fence insulation due to vegetation on the electric fence), this is represented by an ohmic resistor 9 of 5000 ⁇ , for example, connected in parallel with the electrical capacitor, in order to simulate a specific vegetation situation on the fence. With very strong vegetation and in contact with animals, a high R-load can occur, e.g. the fence insulation drops to 5000 ⁇ or less.
  • Each of the two pulse generators 6 and 7 contains a pulse transformer Tr1 or Tr2, an energy storage capacitor C1 or C2 and a discharge switch S1 or S2 to the energy storage capacitor C1 or C2 via the primary winding W11 or W12 of the respective pulse transformer Tr1 in the example shown or to discharge Tr2.
  • the switches S1 and S2 are controlled electronic switches, for example thyristors, as indicated at Th in Figure 2.
  • the secondary windings W21 and W22 of the pulse transformers Tr1 and Tr2 are connected to the electric fence, namely a high-voltage diode D3 is inserted between the secondary winding W22 and the electric fence on the pulse generator 7.
  • Each energy storage capacitor C1 or C2 is charged via a diode D1 or D2 from the same DC-DC converter 2 ago, so brought to the same charging voltage.
  • the two pulse generators 6 and 7 differ in that the pulse generator 6 is designed for the generation of high-energy pulses.
  • the pulse transformer Tr2 is formed with a much closer coupling of its two windings W12 and W22, so that the loss factor or the leakage inductance Ls2 can be lower, ie 1 to 2% of the transformer inductance.
  • the pulse transformer Tr2 of the second pulse generator 7 can also be made smaller and with a lower inductance than that of the first pulse generator 6.
  • FIG. 3 shows the electrical operating diagram (equivalent circuit diagram), which corresponds to the pulse generator 6 according to FIG. 1.
  • L is the equivalent equivalent inductance of the pulse transformer Tr1
  • L is the equivalent inductance of the leakage inductance of the pulse transformer Tr1 and R the equivalent resistance.
  • the mode of operation of the first pulse generator 6 is explained below with reference to FIG. 3:
  • the energy storage capacitor C1 be charged to the voltage U1.
  • An ignition pulse makes the thyristor Th conductive.
  • the energy storage capacitor C1 is connected in parallel to the primary winding of the pulse transformer.
  • the equivalent inductance L is large compared to the equivalent leakage inductance Ls, so that the impedance of the path Ls, R, Cz is significantly smaller than the impedance of the path over L.
  • the discharge circuit is closed, an electrical vibration sets in. Because of the smaller values of Ls compared to L and Cz compared to C1, the frequency of this first oscillation is high.
  • the current passes into a second oscillation, which is determined by the capacitance of the energy storage capacitor C 1, the equivalent inductance L of the pulse transformer and the equivalent resistor R.
  • the frequency of this second oscillation is therefore significantly less than the frequency of the first Vibration.
  • a certain amount of electrical energy is stored in the storage capacitor (0.5 C1U12).
  • the sizes of the equivalent leakage inductance Ls, the equivalent resistance R and the secondary-side capacitance Cz (for example the capacitor 8 indicating the electric fence) and the release time of the thyristor Th are selected so that the thyristor is blocked by the negative half-wave of the first oscillation of the transient process.
  • the ignition pulse must have elapsed at this point in time so that the ignition pulse does not keep the thyristor open.
  • the discharge process of the energy storage capacitor C 1 is interrupted. It is then taken from the energy storage capacitor C1 only as much energy as is necessary to charge the secondary-side capacitance (8 or Cz).
  • the energy emitted by the energy storage capacitor C1 is supplied from the upstream energy source or supplemented by early energy recovery.
  • a bleeder resistor Rz or, in the case of fence growth, a bleeder resistor 9 is connected in parallel to the fence capacitance Cz or 8. This leads to a strong damping of the first oscillation, the second half-wave of the first oscillation becoming significantly smaller or no longer appearing. Thyristor Th is no longer blocked. The energy of the energy storage capacitor C1 is now fully discharged via the resistance Rz of the animal body or the resistance 9 of the fence cover.
  • the following functional sequence results for the entire electric fence device according to FIG. 1:
  • the device is only loaded with the capacitance 8. If the circuit arrangement is connected to the power supply, only the first pulse generator 6 initially runs. Voltage pulses of the type explained above are applied to the fence at intervals of approximately 1 s.
  • the periodically actuated switch S 1 by the clock 5 via its output a is bridged with an energy recovery diode D4. After the first half-wave of the transient, the switch S1 interrupted again.
  • the pulse energy on the electric fence flows almost completely back into the energy storage capacitor C 1, so that the overall system works very energy-saving and, for example, feeds pulses with a peak voltage of more than 5000 V and a foot width of 0.1 ms into the fence .
  • Figure 4 shows the curve of the voltage across the energy storage capacitor C1 with practically purely capacitive fence loading and in dashed lines with capacitive and ohmic fence loading.
  • the function-related voltage drop depends on the amount of energy withdrawn for a short time. If the electric fence (capacitor 8) absorbs all the energy from the energy storage capacitor C1, the zero line is reached, which marks about the maximum of the fence to be connected. A superimposed oscillation can also occur here, the apex of which falls below the zero line.
  • the zero line is reached. Then the voltage across the energy storage capacitor C 1 gradually increases (dashed line in Figures 4 and 5).
  • the different voltage curve according to FIG. 4 and FIG. 5 serves as a criterion for triggering the second pulse generator 7.
  • a plurality of evaluation points or evaluation lines can be set up for this. According to Figure 4, the line X1 intended. If the capacitor voltage falls below the level X 1, for example, the evaluation logic housed in the evaluation unit 4 gives the start command to the clock generator 5 for the switch S 2 in the second pulse generator 7 and triggers a narrow pulse of high peak voltage there. As shown in FIG.
  • the narrow pulse of high voltage that occurs when triggered is naturally behind the expiry of the wide pulse that triggers it from the first pulse generator 6 adjustable control part in the clock generator 5, the control pulse appearing at the output b of the clock generator 5 for the switch S2 of the second pulse generator 7 in such a way that the following narrow high-voltage pulses are placed in the position chosen with the device 10.
  • the following narrow high-voltage pulses can preferably be placed on the apex or in the vicinity of the wide, energy-laden pulse coming from the first pulse generator 6. This results in a partial summation of both voltages, so that the total voltage is significantly higher than the highest partial voltage.
  • the energy per pulse combination is almost exclusively in the lower main pulse. It is adapted to the performance of the battery used.
  • the peak value of the energy-laden, wide pulse still reaches a maximum of 1000 V, which is no longer sufficient to generate an electrical spark on an animal touching the fence.
  • the energy-free high-voltage pulse now creates a voltage level that ensures a high level of ignition friendliness without consuming more energy and without burdening the animal touching the fence with more energy than previous devices.
  • the narrow high-voltage pulse is a trigger pulse that enables energy to be transferred to the animal even under extremely unfavorable fence conditions and thus makes the energizer powered by a battery practically independent of vegetation.
  • the start of the evaluation line is shifted in time from the ignition point for the broad energy-laden main pulse, in such a way that only the slowly increasing recharging after a discharge with an electric fence under R-load to an intersection with the evaluation line X2 leads, but not the rapid rise in tension due to energy recovery.
  • the narrow, needle-shaped high-voltage pulse is not triggered even with long and over-long fences, but only when a defined ohmic load on the fence or a defined insulation resistance on the electric fence is undershot.
  • the change in the fence load can also be evaluated on the collector of the chopper transistor or working transistor provided in the DC-DC converter 2.
  • the collector voltage is low when the energy storage capacitor C1 is discharged and larger when it is fully or partially charged.
  • it is also important in this case to delay the start of the evaluation if it is to be achieved that only the drop below a leakage resistance on the fence, ie the exceeding of an R-load threshold, is evaluated and to trigger the narrow one , needle-shaped high-voltage pulses of the second pulse generator 7 is to be used.
  • the delay must be selected so that the rapid swinging through of the capacitor voltage with a predominant C load on the electric fence is completed before the evaluation is started.
  • the control of the clock generator 5 due to the voltage conditions on the energy storage capacitor C 1 or on the collector of the chopper transistor in the DC-DC converter 2 or by voltage sensing on the fence apart and continuous operation of the two pulse generators 6 and 7 can be provided.
  • This simplified version can generally be provided on an electric fence device, which then does not have to be equipped with the evaluation unit 4 and the various scanning devices and also only requires a simplified clock.
  • the current voltage at the energy storage capacitor C 1 or the collector voltage at the chopper transistor of the DC-DC converter 2 can be used to evaluate or evaluate the fence scanning to make it switchable.
  • This can be done by means of a switch 11 which is attached to the clock generator 5 or to the evaluation unit 4.
  • the electric fence device can be operated either with the evaluation or with constant joint operation of the two pulse generators 6 and 7 as desired. This latter possibility can be of importance under special conditions, for example if the electric fence is temporarily overgrown so that the pulse generator 7 would have to be switched on very often anyway.
  • a narrow high-voltage pulse can be added to the broad energy-laden pulse.
  • the high-voltage pulse by ionization preforms the electrical conduction path for the energy-laden pulse to the animal body.

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  • Life Sciences & Earth Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Catching Or Destruction (AREA)
  • Generation Of Surge Voltage And Current (AREA)
EP88113379A 1987-08-20 1988-08-18 Elektrozaungerät Expired - Lifetime EP0304045B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90109787A EP0390227B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873727787 DE3727787A1 (de) 1987-08-20 1987-08-20 Generator zur erzeugung von elektrozaunimpulsen
DE3727787 1987-08-20

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP90109787A Division-Into EP0390227B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät
EP90109787A Division EP0390227B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät

Publications (2)

Publication Number Publication Date
EP0304045A1 EP0304045A1 (de) 1989-02-22
EP0304045B1 true EP0304045B1 (de) 1992-01-02

Family

ID=6334132

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88113379A Expired - Lifetime EP0304045B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät
EP90109787A Expired - Lifetime EP0390227B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90109787A Expired - Lifetime EP0390227B1 (de) 1987-08-20 1988-08-18 Elektrozaungerät

Country Status (2)

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EP (2) EP0304045B1 (enrdf_load_stackoverflow)
DE (3) DE3727787A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2787964B1 (fr) * 1998-12-23 2001-03-23 Lacme Electrificateur de cloture, a transformateur en faible masse
EP1662846B1 (de) 2004-11-25 2007-05-09 AKO-Agrartechnik GmbH & Co. KG Weidezaungerät
NZ540066A (en) * 2005-06-23 2007-02-23 Gallagher Group Ltd Improvements in and relating to electric fence systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1514726B1 (de) * 1965-06-24 1973-02-01 Schecker Geb Block Schaltung zur Erzeugung von Schreckspannungsimpulsen zur Dressur von Tieren
DE3009838C2 (de) * 1980-03-14 1982-09-23 Horizont Gerätewerk GmbH, 3540 Korbach Impulsgenerator
DE3439015A1 (de) * 1984-10-25 1986-04-30 Horizont Gerätewerk GmbH, 3540 Korbach Elektrozaungeraet
NZ219542A (en) * 1986-07-04 1989-04-26 Gallagher Electronics Ltd Electric fence energiser with multiple pulse generators

Also Published As

Publication number Publication date
DE3727787A1 (de) 1989-03-02
EP0304045A1 (de) 1989-02-22
EP0390227A3 (en) 1990-12-27
DE3727787C2 (enrdf_load_stackoverflow) 1991-11-07
DE3851895D1 (de) 1994-11-24
DE3867377D1 (de) 1992-02-13
EP0390227B1 (de) 1994-10-19
EP0390227A2 (de) 1990-10-03

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