DE3126303C2 - Watertight and airtight encapsulated anvil primer - Google Patents

Abstract

For the function of devices in which primers are installed, it is necessary that no moisture reaches the primer of the primer. Only if the primer is completely dry can the devices with primers function properly, for example in the case of detonators. The invention is based on the object of creating a primer cap which is encapsulated in a watertight and airtight manner, where the disadvantages described are prevented with certainty. The object is essentially achieved in that the firing side of the primer is sealed airtight and watertight. There are various possibilities here, which can be seen in the accompanying drawing in the examples of FIG. 1 to FIG. The advantage that can be achieved is that the airtight encapsulation of the primer prevents moisture from penetrating the primer and therefore ensures an absolutely reliable ignition, even at extreme temperatures.

Description

The invention relates to a watertight and airtight encapsulated anvil primer.

For the function of devices in which primers are installed, it is necessary that none Moisture reaches the primer of the primer. Only when the primer is completely dry correct functioning of the devices with primers, e.g. explosive detonators, is guaranteed.

It is known to seal large-caliber primers on the firing side with a film. These Execution is characterized in that the foil with the outer jacket of the primer is watertight is crimped.

Another known design of water- and airtight encapsulated small-caliber primers is characterized in that the primer is inserted in a thin-walled pot and the thin-walled one The pot is crimped with the primer and the primer carrier.

The primer and the thin-walled pot in the primer carrier are sealed by means of an O-ring or a sealing varnish.

The DE-PS 47 626 shows a piercing primer, which results from the fact that the anvil is missing (see Figures 1, 4,5,6).

The small-caliber primers, which are inserted into a thin-walled pot, have a tight fit of the primer, which is necessary for reliable ignition, is no longer guaranteed if between the outer diameter of the primer cap and the inner diameter of the pot and / or the outer diameter of the pot and inner diameter of the receiving hole for the pot in the primer carrier the desired tolerance is no longer given for proper attachment. Is between the primer, the pot and the Location hole in the primer carrier too much play, can occur when the firing pin hits the anvil Due to the tolerance, the primer cap creates a buffer that prevents ignition. Furthermore

jo

- »ο the thin-walled pot can be torn out of the flange, which also prevents ignition.

The invention is based on the object of a watertight and airtight encapsulated anvil primer to create where the disadvantages described are prevented with certainty.

The object is achieved in that in egg ° r groove 7a of the primer carrier 11 below the firing side of the primer a sealing ring 7 is firmly pressed, the sealing ring 7 about the Inner diameter of the primer accordingly, so thin-walled 8 is designed that it is from the The ignition flame of the primer is pierced and tine underneath detonating cord or a delay set is set on fire.

The strength of the sealing ring in the extension of the inner diameter of the primer can accordingly the primer weight can be made variable. The strength and primer weight must be in corresponding relation.

Since the sealing washer is pierced, there is also perfect degassing of the under the primer carrier lying fuse or the delay rate guaranteed.

Such a watertight and airtight encapsulated primer with sealing washer in A primer carrier can of course also be used for other explosives, designed as complete Ignition unit.

The sealing washer is most expediently made of aluminum, lead, tin or some other temperature-resistant Material formed.

The primer is inserted into the mounting holes of the primer carrier with a press fit and crimped watertight by crimping with the primer carrier with the aid of a sealing ring. Instead of the O-ring, the desired Sealing can also be done with a sealing block.

Instead of the innovation described, new solutions similar to those in the drawing can also be used F i g. 2, fig. 3, fig. 4 can be used. It is worth considering which solution to encapsulate a watertight and airtight primer is most appropriate.

The advantages achieved by the invention are in particular that through the waterproof and airtight Encapsulation of the primer allows moisture to penetrate into the primer of the primer is prevented and the production of a watertight and airtight encapsulated primer is easy and cheap is.

In addition, an absolutely safe ignition is guaranteed.

The exemplary embodiments of the invention are shown in the drawing and will be described in more detail below described. It shows

Fig. 1 cross section through a watertight and airtight encapsulated primer of the type described,

Fig, 2 cross section through a watertight and airtight encapsulated primer, with a thin-walled pot inserted into the interior of the primer will,

Fig. 3 cross section through a watertight and airtight encapsulated primer, where a pot with thin-walled The bottom is inserted into the interior of the primer,

K ig. 4 cross section through a waterproof and airtight

encapsulated primer where a pot with thin-walled The bottom is inserted into the interior of the primer and the seal between the pot and Primer is done through an O-ring.

As can be seen from the drawings, the illustrated embodiments are for water and airtight encapsulation of the primer from the essential idea of the invention is almost the same. For all versions must either have a sealing washer, which is arranged below the primer or a pot with a thin-walled bottom, v / elcher inserted into the interior of the primer will be used.

The embodiment according to FIG. 1 consists essentially from the primer 1 with primer 2, anvil 3, abutment 4, O-ring 5, flange 6, sealing ring 7, the thin-walled bottom of the sealing ring 8, the degassing holes of the primer cap carrier 9 and 10 and the primer carrier 11.

The statements according to FIG. 2, 3 and 4 are like FIG. 1 also in a primer carrier 1 i inserted and flanged to the primer carrier

It is superfluous, in the case of the representations according to FIG. 2, 3 and 5 again the positions as in FIG. 1 shown.

The embodiment according to FIG. 2 shows the primer 1 and the thin-walled pot 12.

The embodiment according to FIG. 3 shows the primer 1 and the pot 13 with a thin-walled bottom 14.

The embodiment according to FIG. 4 shows the primer 1, the pot with a thin-walled bottom 18 and the O-rings 5 and 17.

In all of the exemplary embodiments, it is ensured that the primer cap is press-fitted into a receiving bore of the primer carrier is firmly inserted and the primer is crimped to the primer carrier will. A buffer formation and thus a prevention of a reliable ignition is in the illustrated Examples excluded.

When the firing pin strikes the anvil of the primer, the primer cannot come out of the Bracket will be torn.

In addition, all the exemplary embodiments for the encapsulation of a watertight and airtight primer with simple Mittelrt.vu accomplish.

The described types kornr U create a watertight and airtight encapsulation of the primer, which technically corresponds to the set military requirements and also economic is easy to manufacture.

1 sheet of drawings

Claims (4)

Patent claims: 1. Watertight and airtight anvil cap, characterized in that a sealing ring (7) is firmly pressed in a groove (7a) of the primer carrier (11) below the firing side of the primer, the sealing ring (7) approximately corresponding to the inner diameter of the primer is so thin-walled (8) that it is pierced by the ignition flame of the primer. 2. primer according to claim 1, characterized in that instead of the sealing ring a a thin-walled pot (12) inserted into the interior of the primer is provided 3. primer according to claim 1 and 2, characterized in that instead of the sealing ring a pot (13) with a thin-walled bottom (14) inserted into the interior of the primer is provided is. 4. primer according to claim, characterized in that that the seal (7) between the pot (18) and primer by an O-ring (17) takes place.