Ammunition and explosives – Mines
Patent
1988-01-29
1989-07-25
Kyle, Deborah L.
Ammunition and explosives
Mines
102429, F42B 2322
Patent
active
048502766
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a mechanism assembly intended for practice mines of the kind which are intended to simulate a live mine and which comprise a mine body, the mechanism assembly comprising a mechanism housing mounted on the mine body and incorporating an axially movable and axially rotatable arming plunger which can be depressed manually from outside the mine, to obtain therewith an arming movement which simulates a desired arming function of the mine, and which further incorporates an axially movable release piston which can be depressed from outside of the mine and which is arranged to co-act operatively with the arming plunger in the depressed position thereof, in a manner to influence the arming movement of the plunger.
PRIOR ART
With practice or training mines of this kind the torque prevailing at the terminal positions of the axially rotatable arming plunger is taken up by a cylindrical locking pin that passes through a hole extending radially through the arming plunger. It has been found, however, that repeated arming and disarming of the mechanism is liable to result in wear on the hole, such that the pin will not be held firmly therein, due to the resultant clearance between the pin and the hole-defining surfaces, with the accompanying risk that the pin may loosen and fall away.
Another drawback with known practice mines of this kind is that the provision of the grooves required in the mechanism housing to accommodate and guide the terminal positions of the pin is both difficult and extensive.
DISCLOSURE OF THE INVENTION
The object of the invention is therefore to provide a mechanism of the aforesaid kind which will function more reliably than the known mechanism, even after being repeatedly armed and disarmed, and which can be manufactured more readily than the aforesaid known mechanism. This object is achieved with a mechanism of the aforesaid kind that has the characterizing features set forth in claim 1.
Further features 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 the accompanying drawings, which illustrate a preferred embodiment of the inventive mechanism assembly.
FIG. 1 is a cross-sectional view of a practice mine fitted with the inventive mechanism assembly.
FIG. 2 is a side view of an arming plunger incorporated in the mechanism assembly illustrated in FIG. 1.
FIG. 3 is a plan view of a catch plate incorporated in the mechanism illustrated in FIG. 1.
FIG. 4 is a cross-sectional view taken on the line IV--IV in FIG. 1 and turned through 45.degree., and illustrates the arming plunger in a disarming or safe position.
FIG. 5 is a cross-sectional view similar to that of FIG. 4 but with the arming plunger shown in its arming position.
DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 1 illustrates a substantially hemi-spherical, empty metallic mine body 1 of the kind which is conventionally found with anti-tank mines and which, in accordance with the invention, forms the mine body of a practice mine which is intended preferably to be laid in a horizontal position. The outwardly facing circular orifice of the mine body is covered with a conventional metal cover member 2, the centrally located part of which, however, is modified in accordance with the invention to form a housing 3 which accommodates the inventive mechanism. An axially rotatable metallic arming plunger 4 is mounted for axial movement in a bush 5 located in an outer wall 3a of the housing 3, and can be depressed into the housing against the action of a first thrust or compression spring 6.
As will be seen more clearly from FIG. 2, the arming plunger 4 consists of an elongated member having a first, cylindrical end-part 4a, which is mounted for axial movement in the bush 5, and intermediate part 4b, which has a rectangular shape in cross-section and which tapers at one end thereof remote from said first end-part 4a into a cylindrical second end-part 4c of smaller diameter of the first
Andersson Tord
Olofsson Goran
Affarsverket FFV
Kyle Deborah L.
Wendtland Richard W.
LandOfFree
Mechanism for practice mines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mechanism for practice mines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanism for practice mines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2349974