JPS598759B2 - Mechanical-electric time fuze for flying objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanical and electrical time fuze used in projectiles such as artillery shells.

Conventionally, there have been two types of time fuses: mechanical and electrical, each with their own advantages and disadvantages.

That is, although the mechanical type has the advantage of good timing accuracy, it has the disadvantage that the time range cannot be set for a long time.

Furthermore, although the electric type can have a long time range, it has the disadvantage of poor timing accuracy.

This is mainly due to the so-called C-R in conventional electric time fuses.
Because a timer was used, variations in capacitance due to ambient temperature of the capacitor would cause a large error in the time limit.

Therefore, as a method to easily prevent fluctuations in the time limit due to such capacitance changes of the capacitor, Japanese Patent Laid-Open No. 52-12
The one described in Publication No. 0600 has already been proposed.

However, when setting the time limit before launching the projectile, this
This method measures the capacitance of a capacitor, converts it into a digital value, performs arithmetic operations, and controls the actual time-limited operation time from the result of the arithmetic operations.The disadvantage is that the configuration is extremely complicated and expensive.

By organically combining a mechanical timer mechanism and an electric timer mechanism, this invention can make effective use of the advantages of both, thereby making it possible to extend the timer over a long period of time, while also being highly accurate and structured. A simple new time fuse is proposed, which will be explained in detail below according to the illustrated embodiment.

FIG. 1 is a schematic configuration diagram showing the overall configuration of a time fuse according to the present invention. In the figure, the reference numeral 1 indicates a container body, and the container body 1 includes a power source 2, an electric timer mechanism 3, and a mechanical fuse. A timer mechanism 4, a safety mechanism 5, and a booster charge 6 are built-in.

The vessel body 1 is attached to a warhead, for example, by its threaded portion 1a.

The power source 2 in the vessel 1 is, for example, a battery activated by the impact upon firing, and supplies power to the electric timer 3 after the mechanical timer 4 has timed its operation.

The mechanical timer mechanism 4 is a conventionally known timer mechanism that utilizes centrifugal force or spring force, and performs a timer operation until the voltage of the power source 2 reaches a certain level after firing.

As shown in FIG. 2, the electrical time limit mechanism 3 is composed of an oscillator 7, a frequency divider 8, a counter 9, a comparator 10, a nonvolatile semiconductor element 11, and a safety release gate circuit 12, and is a mechanical time limit mechanism. The mechanical timer mechanism 4 is connected to a power source 2 through a power source 2, and after the mechanical timer mechanism 4 has timed operation, power from the power source 2 is supplied to perform the timed operation.

FIG. 2 is a block diagram showing the electrical configuration of the time fuse according to the present invention.

When power is supplied to the oscillator 7, the oscillator 7 outputs an oscillation signal, which is divided by the frequency divider 8 to become a clock pulse with a constant period, which is counted by the counter 9 and the counted value is compared. input to the device 10.

On the other hand, the nonvolatile semiconductor element 11 stores a set time limit set in advance by an external time limit setting device (not shown) before launching the projectile, and the stored time is counted by the comparator 10. 9, and when the two match, an output signal is input from the comparator 10 to the detonator 13.

That is, in this time fuze, when the flying object to which it is attached is launched, the power source 2 is first activated based on acceleration or centrifugal force as described above to generate a voltage and start the mechanical time mechanism 4.

Then, after the voltage of the power source 2 reaches a certain level, the fixed time period operation of the mechanical timer mechanism 4 ends, and the electric power of the power source 2 comes to be supplied to the electric timer mechanism 3.

Therefore, according to the present invention, the mechanical timer mechanism 49
This eliminates the startup error of the electric timer mechanism 3 until the voltage of the power source 2 reaches a certain level.

Note that the projectile may be launched without setting a time limit on the nonvolatile semiconductor element 11, so
To ensure safety in such cases, Counter 9
It is possible to have a circuit configuration that does not count from 0,
Such circuit construction is easily accomplished using conventional techniques.

It is still a certain amount of time (for example, 10 seconds) before reaching the set time limit set by the time limit setting device, or a certain percentage before (for example, if this percentage is 10%, if the set time limit is 100 seconds, then the time limit is 10 seconds). seconds), the safety release gate circuit 12 is opened, a safety release signal is inputted to the safety mechanism 5 through this, and the ignition signal output disabled mode is switched from the firing signal output disabled mode to the enabled mode. It is safe even if the circuit malfunctions.

Furthermore, if the ignition signal can be input to the detonator 13 using only the mechanical timer 4, it will be convenient to set a short timer.

As is clear from the above detailed description, the time fuse according to the present invention combines a mechanical timer mechanism and an electrical timer mechanism, and after the timed operation of the former, power is supplied to the latter through it. This has the advantage of not only allowing a long time limit, but also being highly accurate and having a simple configuration.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the overall construction of a time fuse according to the invention, and FIG. 2 is a block diagram showing the electrical construction. 2...Power supply, 3...Electric timer mechanism,
4...Mechanical timer mechanism.

Claims (1)

[Claims] 1. A power source that is activated after firing, a mechanical timer mechanism that performs a timed operation during the rise time when the voltage of the power source reaches a predetermined level after firing, and a mechanical timer that is connected to the power source via the mechanical timer mechanism. A mechanical and electrical time fuze for a flying object, comprising an electric timer mechanism that performs a timed operation by being supplied with electric power after the timed operation of the timer mechanism.