FI61244C - FOER SPORTSKYTTE ANVAENDBAR LERDUVA - Google Patents

Description

61244

CLAY FOR SPORTS SHOOTING FÖR SPORTSKYTTE ANVÄNDBAR LERDUVA

The invention relates to a clay disc for use in sports shooting. Clay puck shooting is a sport in which a shooter tries to shoot broken clay puck into the air with a shotgun. Clay puck shooting is an Olympic sport that uses rules-defined clay puck weighing 100 to 110 g, a diameter of 110 to 2 mm and a height of about 25 to 28 mm.

The disc is usually fired into the air mechanically, so that always one of the overlapping disc piles is transferred to the machine for throwing. The disc receives a rotational motion about its central axis and thus remains in balance.

The clay disc looks upside down when turned upside down. The lower edge of the disc is very smooth so that the disc slides well from the machine into the air. The discs are stored and transported stacked on top of each other.

Since the lower surface of the disc must be very smooth and in the stack this smooth surface rests on the smooth edge of the disc below, even a small amount of moisture causes the gap between the discs to become airtight. In addition, when there are many discs in the stack pressing on top of each other, moisture easily creates a vacuum between the discs, which prevents the in-turn disc from coming out of the stack for throwing. However, the lower surface of the disc must be very smooth in order for the disc to slide well when thrown into the air, as already stated above. Even small irregularities can easily cause slippage.

The invention seeks to eliminate the creation of a vacuum and the disadvantages thereof.

The clay disc used in sports shooting according to the invention is characterized by the features set forth in the characterizing part of the claim.

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The invention is explained in more detail in the accompanying drawing by means of figures showing a preferred embodiment of the invention.

Figure 1 shows a top view of a clay disc.

Figure 2 shows the same disc seen from the side.

Figure 3 shows a detail of a clay disc cut and in a larger size than it actually is.

Figures 1 and 2 show the clay disc somewhat schematically. At the lower edge of the disc there is a lower part 1, the lower surface of which has a semicircular ridge 2 in cross section, as shown in Figures 2 and 3 * The upper surface 3 of the flange part 1 has grooves 4.

There may be several, but preferably still evenly distributed on different sides of the disc to maintain the balance of the disc. In the example shown in the figures, there are four grooves.

When the discs are stacked on top of each other, the ridge 2 below the upper disc rests on the upper surface 3 of the flange part 1 of the lower disc. There is thus so much lateral play 5 between the overlapping discs that air can pass well in the vertical gap between the discs. When there are grooves 4 in the upper surface of the flange 1, air enters the vertical gap between the discs through these grooves, thus preventing the vacuum created between the discs and at the same time the discs adhering to each other.

The grooves in the upper surface of the flange part 1 do not cause any disadvantages to the discs. The grooves are easy to make when casting wafers. The disc in the example has four grooves of circular cross-section with a diameter of 2 mm.

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The discs must be easily broken when hit by a shot. However, they must not break during transport, even if there is a lot of overlap. There is a lot of weight on the lower discs, so even the slightest vibration during transport can break them if the discs do not rest evenly on top of each other. For this reason, no ridges can be made on the upper surface 3 of the flange part, which would prevent the discs from pressing too tightly together.

Small holes can also be made in or on the edges of the disc to prevent vacuum. However, the holes must be so small or positioned that the shot cannot pass through the disc without breaking the disc.

The small holes can be in the middle part of the disc or, for example, through the flange part 1 in the radial direction. The disadvantage, however, is that making holes makes it difficult to make the wafers.

Also, the lower surface of the disc cannot be provided with grooves or ridges to prevent tightness between the discs.

The embodiment of the invention shown in the drawing is therefore very advantageous in that the making of the grooves does not complicate the casting work, because the grooves are formed by the ridges of the mold during casting.

In addition to the fact that the flying of the new clay discs is not disturbed by the wetting of the discs, the advantage is also obtained that the discs, which have not broken, can be reused. The moisture which usually enters them does not interfere, because the grooves according to the invention do not create a vacuum And are caused by a disturbance in the flying of the discs.

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The drawing shows a practical solution.

However, the solutions of the invention can be modified within the scope of the claims.

Claims (4)

61244 P ATE NTT IV A AT I MU KS ET A clay disc for sport shooting, characterized in that grooves (1J) or small holes are made above the bottom ridge (2) of the disc to guide air between the discs in the stack in order to prevent a vacuum between the discs. Clay disc according to Claim 1, characterized in that radial grooves (4) are formed in the upper surface (3) of the base flange (1) of the disc. A clay disc according to claim 1, characterized in that there is a hole or holes in the middle of the disc which are so small that the shot used in the shooting is not suitable for passing through the hole without breaking the disc. Disc according to Claim 1, characterized in that the disc has holes through the flange part 1 in the radial direction.