JPS598760B2 - Mechanical-electric time fuse for flying objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanical-electric time fuse 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.

Mechanical ones have the advantage of good timing accuracy, but
It is difficult to measure over a long time period, and the accuracy deteriorates as the time period becomes longer.

In this method, a scale member having a time scale is provided around the approximately conical vessel body, and a measuring member is rotated along this to align the reference point of the measuring member with the scale member to set the time. This is because the mechanism is designed such that if a long-term scale is to be applied, the interval between the scales becomes small, making it impossible to apply a short-time scale.

On the other hand, the electric type allows a longer time range, but has the disadvantage of poor time accuracy.

This is because in the case of an electric time fuse, variations in the rise time of the batteries used to drive the timer mechanism affect the timing accuracy and cause a large error in the time limit.

Furthermore, the electric type requires a measuring device different from that of the mechanical type when measuring the time, and has the disadvantage that the user is not accustomed to handling the measuring device.

By organically combining a mechanical timer mechanism and an electric timer mechanism, this invention can make effective use of their advantages, thereby making it possible to extend the timer time and create a highly accurate timer fuze. We aim to provide the following.

It is further explained below by means of illustrated embodiments.

FIG. 1 is an external view of the time fuse according to the present invention, and FIG.
The figure is a schematic configuration diagram showing the overall configuration.

The reference numeral 1 in the figure is a container having a substantially conical shape, and a scale member 2 having a scale is provided at the bottom end of the container 1, and a measuring member rotates along the scale member 2. Install 3.

The measuring member 3 is provided with a mark at the base point so that it can be aligned with the scale of the scale member 3.

A threaded portion 1a is provided on the bottom surface of the vessel 1 so that it can be attached to the warhead of a flying object.

As shown in FIG. 2, the container body 1 contains a power source 4, an electric timer 5, a mechanical timer 6, a safety mechanism I, and a booster charge 8.

A power source 4 within the vessel 1 is, for example, a battery activated by the impact upon firing, and supplies power to the mechanical timer 6 and the electric timer 5.

The mechanical timer mechanism 6 is shown in FIGS. 3 and 4.

Reference numeral 9 in the figure is a measuring pin fixed to the measuring member 3,
One end is engaged with the time plate 10.

When the timing member 3 is rotated to set the time before launching the projectile, the timing plate 10 is rotated by the angle corresponding to the set time by the timing pin 9.

When a flying object is launched, the pin 12 and lever 13, which are the safety devices regulating the movement of the gear train 11, become uncoupled due to the acceleration at the time of launch and the centrifugal force caused by rotation around the axis of the aircraft.
The wheel train 11 is released from regulation.

In other words, the pin 12 is pushed downward in the figure by the acceleration,
The lever 13 moves laterally due to centrifugal force, and the pin 13a implanted in the lever 13 is disengaged from the gear 14 of the wheel train 11.

At this time, the gear 15 supported eccentrically begins to rotate due to the centrifugal force and the restoring force of the spring 16 that applies rotational force to the gear 15.

The gear 15 meshes with a gear 17 fixed to the center of the time plate 10.

Since the gear 18 provided at one end of the gear 17 meshes with the gear train 11, 150 rotations of the gear are transmitted to the gear train 11.

However, since the rotation of the gear 18 is regulated by the gear train 11 including the angle and escape wheel, the time plate 10 gradually returns to the reference point while the rotation time is controlled.

The time plate 10 gradually rotates and returns to the reference point, and the time plate 10
When the cut groove 19 provided in
It enters the cut groove 19 due to the restoring force of the spring 22 which spirals in the direction.

At this time, the rotation shaft 21 provided perpendicularly to the center of the time switch stop lever 20 rotates, and the other stop member 24 of the four parts 23 provided at one end thereof enters.

The switch rod 25 latched to the stop member 24 is disengaged from the stop member 24 and falls due to the biasing force of the spring 26 .

The switch rod 25 contacts the switch contact 21 directly below it, shorting the two contacts.

As shown in FIG. 5, the electric time limit mechanism 5 is composed of an oscillator 28, a frequency divider 29, a switching control device 30, and a counter 31, and a time limit switching device 32 and a mechanical time limit mechanism 6.
The power supply 4 is also connected to the oscillator 28 .

The power source 4 is generated by the acceleration or centrifugal force after the projectile is launched, the oscillator 28 and the frequency divider 29 start operating, and the frequency divider 29 outputs clock pulses for counting, which are input to the switching control device 30. .

The switching control device 30 does not output to the counter 31 until the set time limit of the mechanical time limit mechanism 6 finishes counting.

When the mechanical timer mechanism 6 completes timing, the switching control device 30
A clock pulse is outputted from the counter 31 and inputted to the counter 31, and the electric timer 5 starts measuring time.

Here, when the timing is completed for a certain period of time, a signal is sent to the detonator 33 and it is ignited.

FIG. 6 is a circuit diagram of the fuse, and the operation of the fuse according to the present invention will be explained below.

If the time can be set using only the mechanical timer mechanism 6, the timer switching device 32 is turned on as shown in the figure to measure the measuring member 3 to the scale member 2.

After the flying object is launched, the time limit switch 34 is moved and turned on by the mechanical time limit mechanism 6 after the set time limit has been counted, and a signal is sent from the electric detonator 35 to the detonator 33 to ignite it.

On the other hand, when setting a long time limit that is insufficient for the mechanical time limit mechanism 6 alone, the time limit switching device 32 is first turned off.

Then, for example, set the desired time period to T. When closing, assuming that the set time limit of the electric time limit mechanism 5 is T1, the time limit of To-T1=T2 is measured in the mechanical time limit mechanism 6.

Therefore, when the flying object is launched, the mechanical timer mechanism 6 is started, and the four power sources are started by the acceleration or centrifugal force of the flying object, and the oscillator 28 and frequency divider 29 start operating.

Here, the frequency divider 29 divides, for example, the oscillation frequency f=32768 Hz of the oscillator 28 to 1/21'', and the frequency division ratio of the frequency divider 29 is changed depending on the value of the oscillation frequency.

When the mechanical timer mechanism 6 completes timing and the timer switch 34 is turned on, a count enable signal is input to the frequency divider input terminal No. 2908 to start frequency division, and a clock pulse is output from the No. 12 output terminal. .

This clock pulse is input to the switching control device 30, and since the mechanical time limit mechanism 6 has finished counting the time period T2, the clock pulse is input from the switching control device 30 to the counter 31.

At the same time, the electric timer mechanism 5 starts counting time, and when it completes counting up to the time limit T1, an output signal is sent to the detonator 33 and it is ignited.

Note that the switching control device 30 switches the clock pulses to the counter 31 if the set time limit in the mechanical time limit mechanism 6 is not counted.
Do not output to .

Reference numeral 36 in the figure is a landing switch, and when the flying object hits an object, the impact causes the switch to be turned on and detonated.

In addition, numeral 31 is a short-circuit switch, and its contacts are closed before the projectile is launched.
Even if a voltage is applied to the electric detonator 35, it is short-circuited and no current flows through the electric detonator 35.

Note that the short circuit switch 37 is turned off by releasing the safety mechanism immediately after firing.

38 is a transistor for driving the electric detonator 35.

As is clear from the above description, the time fuse according to the present invention combines a mechanical timer mechanism and an electrical timer mechanism, and the latter timer operation is performed after the former timer operation, so that the timer fuse has a longer timer time. It has the advantage of being highly accurate and simple in construction.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an external view of a time fuse, FIG. 2 is a schematic diagram of its overall configuration, FIG. 3 is a schematic diagram of a mechanical timer mechanism, and FIG. 5 is a block diagram showing the electrical configuration, and FIG. 6 is a circuit diagram thereof. 2... Scale plate, 3... Measuring member, 4...
...Power source, 5...Electric timer mechanism, 6.
...Mechanical timer mechanism.

Claims (1)

[Claims] 1 A measuring member whose time can be set from the outside, a mechanical timer that performs a timed operation at the time set by the measuring member, and a signal that is connected to the mechanical timer and receives a signal after the timed operation of the mechanical timer. A mechanical-electric time fuze for flying objects, consisting of an electric time mechanism that performs a timed operation.