DE1963437A1 - Device for the delayed release of the central suspension of a parachute - Google Patents

Description

Dip !, - Ing. O. Schliebs m Darmsiadt Ludwig-Büchner-Strasse 14

Patent attorney phone {06151} 62928

Postal checking account: Frankfurt a. M. 111157 bank details; Deutsche Bank AG., Darmitadt Telegrams! ! nventron

To the

"German Patent Office

Munich 2
Zweibrückenstrasse 12th

Your reference, your letter Ma! «Z * i * en B 098 Tog 15 * 12 * 69

Subject «Patent application

Applicant! ETAI PRAHCAIS, represented by Kxiiis-tee des Armies _f Paris (France)

Device for the delayed release of the central attachment a parachute,

When linsatz and Trane Port verschiedenartigstes ¹ munitions, the use of parachutes is widespread "be it to a part of the ammunition, eg dropping attempts to win again, whether to that rain down a light or smoke bomb to delay.

In general, the design of a parachute is a compromise between the desired rate of descent and the attainable strength of the parachute. The larger the parachute, the slower the rate of descent, while the other conditions remain the same. But the larger the parachute, the more it is stressed, especially at the moment it is opened. In effect, the stress on the parachute is proportional to the square of the speed. In the special case shedding dee 'of ammunition, light or smoke bombs is now the speed is always open at relatively large, resulting in a high stress of the parachute entails.

009848/0093

Letter from December 15th 6 9 sheet 2 DIpl.-Ing. G. Schlls & s

to the German Patent Office, llünclien patent attorney

Attempts are therefore made to open the parachute delay and only take it when the! speed of the fall is compatible with the strength of the parachute will ·

As a remedy, a double Pallschirmsystem was in some cases au gripped While this is very effective, c, l> He also expensive, and because of the KoinplissiertJaeit cliesar solution, the G-AAGER of Yersagens big "Also look let this solution from Plats; establish not used with all types of ammunition *

Another improvement "consists in adding a central suspension of the parachute in the first drop phase, which increases the resistance of the parachute during the first few meters of its? Omn $ 50 to be reducided . If the speed of fall has decreased a little in the first phase of the drop, the central suspension must be released by means of an appropriate procedure so that the parachute can assume its final shape in order to achieve the desired rate of descent.

Two devices for releasing the central suspension of parachutes for flare ammunition are known so far. One gets a retaining ring from the burn of the ignition or fuel charge of the light or smoke bomb melted through. In the case of the other, the central suspension is released by a delayed detonation device, which is self-ignited by the release stress or by the ignition or fuel charge of the light or smoke bomb.

So in both cases there is a pyrotechnic process

0.0: 984 8/00 9 3 BATH

Brlefvcm15.12.69 sheet 3 DIpL-Ing.Ö.Schilebs

to the German Patent Office ₅ Munich 'patent attorney

uses »the one burning charge, ζ · Β. a Leueht- ode-r Requires smoke bomb and a pipe that runs through this fuel. Ss vrarde now found that the Presence of this pipe in the center of the pulp insert E.g. the light output of light bombs is significantly reduced. In addition, the whole unit is di; re.h this pipe much, heavier.

The invention overcomes this Ifeelrveile and proposes one Device for delayed release of the central suspension of a PailSchirmes, in which a central tether by means of a fusible weld seam with a retaining ring is connected, which can be sheared out in a device housing with low, defined stress is attached and carries an ignition device for a fuel charge on which the fusible weld seam is applied after the retaining ring has pulled out.

The release device according to the invention is a pyrotechnic system which has the advantage of being independent of the residual speed, which is not the case with mechanical systems, which are too sensitive at high residual speeds and too little sensitive at low residual speeds. In addition, the release device according to the invention allows the central suspension to be released with a slight delay, due to the ignition delay of the fuel assembly and the time required to melt the weld seam. The central tube in the fuel can be omitted, which makes the light or smoke bomb easier and the light output of a light bomb is significantly improved. Any ammunition except a fluorescent candy or candy can be recovered.

In a special embodiment of the invention

009848/0093

Letter from December 15th 6 9 sheet 4 DIpl.-Ing. G. Schllebs

to the German Patent Office, Munich Patent Attorney

the retaining ring with a shear pin in the device housing attached, while the ignition device consists of a hook-shaped, attached to the retaining ring firing pin. This creates a particularly simple and functionally reliable release device. The burning set preferably consists of a less volatile material that can be ignited by friction and / or impact, e.g. lead-zirconium-chromate, thereby ensuring a high level of functional reliability and long operational availability of the parachute ammunition is guaranteed.

Details of the invention will be apparent from the following Description of an embodiment based on the drawing. In this show:

1 shows a release device according to the invention on average;

2 shows a parachute provided with the device in FIG. 1 in the first opening phase, and FIG

3 shows the parachute from FIG. 2 in the second opening phase,

In Fig. 1 is a central suspension 1 in the form of a tether by means of a weld 4 with a Retaining ring 2 and a hook-shaped firing pin 3 connected. The whole thing is by means of a safety device fixed in a device housing 5. The safety device can be, for example, a scissor pin 6 act, which shears off under a low, defined load. In the first opening phase of the Parachute (Fig. 2), the tensile force exerted on the central suspension shears off the shear pin. The firing pin with the retaining ring runs upwards and ignites

009848/0093 ~ _BAD

Letter dated December 5, 1969 sheet 5 Dlpl.-Ing. G. Schllebs

to the German Patent Office, Munich Patent Attorney

Impact or friction causes a burning charge 7, which melts the weld seam 4, thereby releasing the central suspension. The parachute then assumes its normal shape in its second opening phase (! Fig. 3). It is of particular interest to use a non-essential fuel charge. As an example, a lead-zirconium-chromate compound can be given, which has the advantage of being sufficiently sensitive to mechanical influences. The burning charge can be protected by a disk 8, by varnish or by other means.

The device according to the invention can be used for any drop screen be used at increased speed, namely for the dropping of luminous ammunition or smoke ammunition as well as parachute bombs, whereby the test pieces can be recovered after a drop attempt. In the context of the invention, it can be used in the details of its execution according to the respective purpose be modified.

009848/0093

Claims (3)

Letter dated 12/15/69 sheet 6 DlpL-lng. G. Sehllebs to the German Patent Office, Munich Patent Attorney Patent Claims 1. Device for delayed release of the central suspension a parachute, characterized in that a central tether (1) by means of a fusible weld seam (4) is connected to a retaining ring (2) which is in a Yorrichtungsgehäuse . (5) Can be sheared out with low, defined stress is attached and carries an ignition device (3) for a burning charge (7) on which the fusible Weld seam is present after the retaining ring has sheared out. 2. Release device according to claim 1, characterized in that that the retaining ring (2) is fastened with a shear pin (6) in the device housing (5) and that the ignition device consists of a hook-shaped ignition pin (3) attached to the retaining ring. 3. Ireigabevorrichtung according to claim 1 or 2, characterized characterized in that the fuel set (7) consists of a k little volatile, by friction and / or impact flammable material, e.g. lead-zirconium-chromate. 009848/0093