Ammunition and explosives – Mines – Igniting means
Patent
1986-10-17
1987-12-08
Kyle, Deborah L.
Ammunition and explosives
Mines
Igniting means
102401, 102404, F42B 2324
Patent
active
047111798
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an arrangement in a mine which is capable of being disarmed or "neutralized" and which can be buried in the ground and which incorporate detecting means effective to detect a neutralized mine, and an initiating device which in response to the detection of a neutralization initiates the detonation of a marker firing charge or "spotter" charge arranged in the mine and capable of propelling a spotter device in the mine to the surface of the ground in which the mine is buried, therewith to indicate the location of the neutralized mine.
BACKGROUND PRIOR ART
Such an arrangement is known to the art from, for example, Swedish Patent Specification SE No. 7905478-9. This earlier Patent Specification describes and illustrates an anti-tank mine which incorporates an initiator for initiating detonation of the mine, and a timing circuit which subsequent to a given time delay from the time of arming the mine, for example a time delay of 30-40 days, neutralizes the mine, if the mine has not been detonated prior thereto. The mine incorporates a spotter charge which is detonated in response to the act of neutralizing the mine and fires a spotter to the surface of the ground in which the mine is buried, therewith to indicate the location of the neutralized mine, the spotter being connected to the mine by means of a connecting line. The mine can then be dug from the ground and reactivated.
It is difficult, however, to dimension satisfactorily the force at which the spotter is propelled. For example, if this force is dimensioned so as also to resist hard earth layers, so that the spotter is reliably driven to the surface of the ground, the speed at which the spotter moves may be excessively high in the case of lightly of loosely packed earth layers, such as to cause the connecting line to break and the spotter to disappear, thereby making it difficult to locate the mine. If, on the other hand the mine is dimensioned for a lighter driving force, the speed at which the spotter is propelled through the ground may be too low, for example in the case of hard earth layers, for the spotter to penetrate to ground level.
DISCLOSURE OF THE INVENTION
Consequently, the object of the invention is to provide an arrangement of the aforesaid kind which will ensure that when fired the spotter will always reach the surface of the ground in which the mine is buried, without being propelled at a speed which might cause the spotter to disappear from the site at which the mine is buried.
This object is achieved with the aid of an arrangement according to the invention having the characterizing features set forth in the preamble to claim 1.
Further developments of the invention are set forth in the depending claims .
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to a preferred embodiment thereof illustrated in the accompanying drawings.
FIG. 1 is a longitudinal sectional view of the arrangement according to the invention.
FIG. 2 is a cross-sectional view taken on the line II--II in FIG. 1, illustrating a screw-base forming part of the arrangement.
FIG. 3 illustrates the attachment of a spring forming part of the arrangement.
FIG. 4 illustrates the spotter during a firing sequence.
FIG. 5 is a block schematic illustrating the mine components intended for generating an initiating pulse for detonation of the spotter charge.
DESCRIPTION OF A PREFERRED EMBODIMENT
The arrangement according to the invention includes in general a spotter which in the illustrated embodiment comprises a spotter sleeve 1, which in FIG. 1 is shown in an inactive position in a mine buried in the ground 2 (in FIG. 1 the cover plate of the mine is illustrated schematically at 3), and which in FIG. 4 is shown during a firing sequence, accompanied by a penetrator 4. The arrangement further includes a spotter charge 5 which fires the spotter sleeve 1 from the mine, in response to a neutralization of the mine. When fired, the spotter sleeve 1 travels through an outer sle
Eriksson Ulf
Risberg Stig
Sundberg Sten
Affarsverket FFV
Carone Michael J.
Kyle Deborah L.
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