Ordnance – Trench mortars
Patent
1993-07-12
1995-01-17
Brown, David
Ordnance
Trench mortars
89 11, 89 29, 102445, 102498, F41A 3300, F41F 100
Patent
active
053817206
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to apparatus for mortars intended to simulate loading and firing with live ammunition by using a dummy inserted in the barrel of the mortar via its muzzle.
A mortar is a smooth bore muzzle loading weapon, where a shell is dropped into the bore. When the shell has come to the bottom of the bore, firing takes place either by the impact of the shell against a fixed firing pin or by the aid of a special firing mechanism.
The object of the present invention is now to cheapen mortar shelling training. Personnel will thus simulate loading and firing while using a dummy of the same appearance and weight as a genuine shell. Firing drill shall exactly correspond to the actual routine used with live ammunition in field scale shelling.
The object of the invention is achieved by the apparatus having been given the distinguishing features disclosed in the accompanying claims.
An embodiment of the invention will now be described, with reference to the accompanying drawing figures, variations of the embodiment also being apparent therefrom.
FIG. 1 illustrates in principle a longitudinal section through an inventive apparatus, while
FIG. 2 is a section along the line II--II in FIG. 1, and
FIG. 3 is a plan as seen from above.
FIG. 4 is a schematic of a mortar, spacer piece, and dummy shell.
A conventional mortar includes a barrel 50, which can be of 8 or 12 cm caliber. A dummy 52 of the same appearance and weight as a genuine shell is used in conjunction with the inventive apparatus.
The dummy 52 is provided with a so-called practice projectile 53, which can leave it, in this way simulating a genuine projectile. With the aid of the invention the dummy can be placed in the barrel so that its tip 54 projects a distance past the barrel muzzle. This means that when the practice projectile has been fired the dummy may be removed from the barrel, i.e. the dummy is not discharged but only the practice projectile. A spacer piece 1 in the form of a tube is provided to achieve raised height of the dummy in the barrel. The lower end of the piece 1 rests on the supporting surface 56 provided in the barrel for a genuine shell inserted in it. The length of the piece is defined such that when the dummy is used its tip 54 projects a distance from the muzzle of the barrel. At its lower end, i.e. the end first inserted in the barrel, the dummy has an ignition cap 58, which must be struck to fire the shell. A firing pin mechanism is required for this purpose, and in this case is disposed in the upper end of the spacer piece. It will be seen from FIG. 1 that the mechanism is arranged between upper 2 and lower 3 plates, which are united by struts 4. The configuration of struts and plates is disposed in the tube 1 such that the upper 2 is flush with the upper edge of the tube.
The mechanism itself includes a firing pin 5, which can move reciprocatingly in the plate 2. Upward movement of the pin is taken to be sufficiently violent that a cap struck by the pin is detonated. The firing pin is set as the dummy moves down the barrel after insertion at its muzzle, and two push rods are provided for this purpose. They are mounted in guides 7 in the plates 2 and 3 such as to extend through them, and are urged to move downwards by the weight of the dummy against the bias of their individual springs 8. These springs bear against the upper side of plate 3 and the underside of a yoke 9 extending between the push rods 6 and rigidly connected to them. The rods 6 will thus be urged downwards by the weight of the dummy, and will move through the plates 2 and 3 until the underside of the dummy engages the upper side of plate 2. The firing pin 5 accompanies this movement of the yoke 9, but can move freely through a guide in it. However, a washer 10, through which the pin passes, is disposed on the underside of the yoke, and is biased by a spring 12 to move to the left in the FIG. The firing pin 5 is provided with a recess (unillustrated) into which an edge of the hole in the washer is urged by the spring 12. The possible movement of
REFERENCES:
patent: 1399243 (1921-12-01), Bergman
patent: 2451524 (1948-10-01), Walker
patent: 2955585 (1960-10-01), Friedland et al.
patent: 3500715 (1970-03-01), Batou
AB Food Mark Production
Brown David
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