DE1083711B - Stabilization for electric dusters - Google Patents

Description

GERMAN

It is known to build electrical capacitor igniters whose electrical charge is generated by charge separation is produced. They are called dust detonators for short.

The amount of charge depends on many factors. It is difficult to pinpoint them beforehand and to be strictly adhered to under all circumstances. The main factors that have an influence on the The size of the bullet rotation and the speed of the Ge-shot are the size of the capacitor charge. Both values are subject to certain fluctuations as a result of temperature and age Gunnery and inevitable unevenness in the cargo. If, in addition, the same detonator to be used for two different storeys, there are greater differences in these values, too expect.

In addition, there are inevitable differences in the charge generation itself, that of the uniformity depend on the dust size, the dust emission and the atmospheric conditions.

The dust generator must in all cases be dimensioned so that under the worst conditions enough charge is generated that is sufficient to ignite the most insensitive ignition means. Therefore, under the most favorable conditions, it may be possible to have a considerably larger load is produced. The ratio between the smallest charge and the largest charge can be 1:10 or even 1:20. Fluctuations in the amount of charge generated are particularly significant when the capacitor charged by charge separation, d. H. the storage capacitor, for activation an electrical timing circuit is used, as described in German Patent 1031687.

But also for any other types of detonators of this type there is a constant or an almost uniform one Tension matters. If z. B. 300 volts in the capacitor are needed to power the ignition for To guarantee the most insensitive ignition means, it is advisable to keep the maximum charge at around 500 volts limit. If you were to allow 3000 or even 6000 volts in the capacitor, it would be necessary that the Capacitor and the entire detonator structure must be designed for this breakdown voltage. That but again means that the capacitor and insulation of the igniter are dimensioned larger have to, which is often not possible due to spatial reasons.

It is therefore proposed, according to the invention, to limit the level of the charge by means of an additional electrical stabilization element. Such an electrical stabilizing member can advantageously provide stabilization
for electric dust igniter

Applicant:

Rheinmetall GmbH,
Düsseldorf, Rather Str. 110

be a glow lamp with a damping resistor connected in parallel to the capacitor to be charged is. It is used here that the glow lamp has a certain ignition voltage and below their ignition voltage has an extremely high resistance value. When the ignition voltage is reached the voltage collapses almost instantaneously to its burning voltage and the tube burns until the capacitor is discharged to the extinguishing voltage value of the glow lamp. Operating voltage and erase voltages are mostly practically the same size. But they are considerably lower than the ignition voltage of the glow lamp. These The method is therefore limited to those cases where there is a relatively small voltage in the capacitor can be worked.

In a further development of the invention, however, the voltage in the capacitor can also be adjusted to the ignition voltage value the glow lamp can be stabilized if an additional capacitor is used with the glow lamp of very small capacitance in relation to the capacitance of the capacitor to be charged in Series switches, which in turn is arranged in parallel to a discharge resistor. The same effect will be achieved when the additional capacitor is arranged parallel to the glow lamp and only the resistor is in series with the glow lamp with additional capacitor.

For a better understanding of the invention, the circuits and their mode of operation should be based on the Figures are explained in more detail:

Fig. 1 shows schematically such a dust igniter. The reference number 1 indicates the projectile body,

009 530/75

Claims (1)

3 4 2 the igniter body and 3 the insulated igniter cap, voltage of the tube 6 equal to the voltage in the condenser contains the dust generator, which is the simplicity capacitor 4, the tube goes out and interrupts a half is not shown. The storage condenser- further discharge. However, since the capacitance of the gate 4 is very small in all cases between the igniter body and the additional capacitor 12, the isolated igniter cap is discharged. He will 5 capacitor4 only a negligible amount. Normally charged, when the dust emerges from the cap, the capacitance of the additional capacitor 12 is wise and charge is generated by charge separation. The capacitance of the capacitor 4, which is only a few pF and therefore mostly 100 times smaller than charging, takes place during the time the dust escapes.
approximately after a curve 5 (Fig. 2). If at the moment in which the tube 6 is cleared Capacitor 4 a glow lamp 6, which has an i °, the charge in the additional capacitor 12 is through Damping resistor 7 is in series, discharged parallel to the resistor 7, and at the same time the is switched, the glow lamp comes to ignition, the charge in the capacitor 4 continues to rise again, as soon as their ignition voltage 8 is reached (Fig. 2). as long as charge is generated by charge separation. At the moment the capacitor 4 is on the burn After the charge in the capacitor 4 is tightened again discharged, and the time of discharge hangs 15 and the charge in the additional capacitor 12 has grown on the size of the damping resistor 7. has become smaller, the tube comes back to If the discharge is greater than the generated La ignition, and this process is repeated until When the dust generator comes into play, the glow comes - no new charge is generated. To this lamp goes out, and the capacitor begins to stabilize in the capacitor 4 a voltage to recharge yourself. It can be sated several times, which is practically equal to the ignition voltage of the Reach the ignition voltage value of the glow lamp, so glow lamp is. The process is varied in FIG the same process is repeated. But it can never be vivid. Here 8 is the ignition voltage of the tube the charge in the capacitor must be greater than the ignition and 13 the voltage in the capacitor 4 after the voltage of the tube 6, and the glow lamp will discharge. The difference between 8 and 13 depends The capacitor never falls below the erase voltage value 9 of the 25 of the ratio between the capacitances of the Discharge tube. If any charge creates capacitors 4 and 12 off. the ignition voltage value of the glow lamp. The same effect is achieved with a circuit, exceeds, at the end of the capacitor a voltage which is shown in Fig. 5. Here's the little Duck which is greater than the extinction voltage of the charge capacitor 12 parallel to the tube 6 geRöhre. 30 switches. The additional capacitor 12 has practically the As stated above, the burning voltage and the same voltage as the capacitor are 4. Its on-erasing voltage of practically the same size charge, however, takes place somewhat more slowly, since with the Order and usually never in all glow lamp types - additional capacitor 12 a resistor is in series, drig. They are on the order of 70 to when the voltage in capacitor 4 reaches the ignition voltage 100 Volt. The tube responds when the ignition voltage of a glow lamp has reached the tube 6 against can relatively easily to higher values and discharges the capacitor 4 by a small amount 300 and more volts can be brought. With a wear, the additional capacitor 12 on the other hand up to Circuit according to Fig. 1 would therefore erase the voltage value of the tube. When the tube If the capacitor has stabilized between 70 and 300 volts, both capacitors can become extinguished which will be admissible for many cases. 40 recharge and the cycle repeats until Fig. 1 also shows the circuit of the impact - no more charge, generated by charge separation igniter. An ignition means 10 is on one side. connected to the detonator body and to the other. FIGS. 3 and 5 show exactly like FIG. The advantage of the circuits that hits a target, the cap 3 is pressed in and 45 according to FIGS. 3 and 5 is - as already comes into contact with the impact contact 11 above, imagines - to be seen particularly in the fact that the storage capacitor is in this way 4 through the capacitor 4 a higher voltage can stabilize ignition means 10 and in this case the ignition can and that this voltage brings only very small fluctuating means to ignition. In such a case, there is no evidence. Circuits of this type are therefore the smallest charge in the capacitor (70 volts) 50 must be very suitable for electrical timing circuits, such as those used in e.g. B. be large enough to be able to cause the most insensitive ignition agent described in German patent specification 1 031 687 to ignite. Others are
on the other hand need the capacitor and the whole
The fuse insulation must be dimensioned in such a way that no breakdown occurs when the voltage in the capacitor 55 claims:
the ignition voltage value of the tube (300 volts)
achieved. A much finer and more accurate stabilization is 1. Electric capacitor igniter, whose possible with the circuit according to FIG. 3. Here is through to capacitor charge after the launch the damping resistor 7 of the glow lamp a 60 charge separation is generated, characterized Additional capacitor 12 of very small capacity due to an additional electrical stabilization parallel switched. Otherwise apply to Fig. 3, the member to limit the amount of charge in the Reference numerals of Fig. 1. When in the circuit to be charged capacitor (4). according to Fig. 3 the ignition voltage of the tube in the storage 2. igniter according to claim 1, characterized capacitor 4 is reached, the tube 6 lights up, 65 through the parallel connection of a glow lamp (6) and the capacitor 4 begins to discharge. Since the damping resistor (7) is parallel to the but with the tube 6 of the additional capacitor 12 in the charging capacitor (4 in Fig. 1). Row, this is charged quickly because the 3rd detonator according to claims 1 and 2, there- Time constant of the circle is very small. As soon as the marked by that the parallel to the Voltage in the additional capacitor 12 and the extinguishing 70 charging capacitor (4) arranged glow- lamp (6) with an additional capacitor (12) of - in relation to the capacity of the one to be charged Capacitor (4) - very small capacitance is in series and the resistor (7) is arranged parallel to the additional capacitor (12) (Fig. 3). 4. Igniter according to Claims 1 and 2, characterized in that the additional capacitor (12) is arranged parallel to the glow lamp (6) and the resistor (7) is in series with the glow lamp (6) with the additional capacitor (12) (Fig . 5). 1 sheet of drawings