FI63861B - ANORDNING FOER MAETANDE AV BACKHOPPLAENGD - Google Patents

Description

χ 63861

Device for measuring the length of hill jumps. - Anordning för mätande av backhopplängd.

The invention relates to a device for measuring the length of hill jumps, which device comprises a detector device attached to a hill jump, consisting of a container or ampoule filled with a marker, provided with a spring-operated emptying device arranged to be triggered by a triggering means.

Such a device is known from Swedish Patent Publication No. 99427. It acts as a trigger member for a heavy piston which reacts to a downward vibration so that, based on the law of continuity of movement, it presses against the spring force and at the same time pushes the toner out of the container. However, the inertia force based on the mass of the piston is not sufficient to give an accurate expression at different intensities of output vibrations.

The object of the invention is to further develop this device so that it is made sufficiently sensitive and accurate.

To achieve this object, the device according to the invention is characterized in that the triggering member is a pivoting trigger lever which can be released during descent to a finished position where it remains in contact with the ground until the ski disengages from the platform, the triggering lever pivots to a tuning position to ground it triggers a drain device.

When the trigger responds to ground contact when descending, the correct trigger moment is always obtained for all jumpers.

Based on the toner spread on the ground, surveyors can easily identify the actual point of descent, which can be checked afterwards. Between different jumps, the toner can be covered with snow.

2 63861

The invention will now be illustrated by reference to the accompanying drawings, which show two embodiments of the invention.

Fig. 1 shows the device according to the invention in a section taken along the line I-I in Fig. 2, and Fig. 2 shows the device according to Fig. 1 in a perspective view.

On top of the jump ski 1, a base plate 3 with a cylindrical release tank 4 in the transverse direction is fastened behind the sole of the shoe. A powdery toner 5 is placed in the container 4.

The container 4 is formed of two parts, namely the outer tube 14 and the actual toner container 15 moving inside it. The arm 18 is fixed to the container 15, the spring 7 surrounding the arm 18 resting on one end against the end of the container 15 and on the other end against the stopper 19. The other end of the container 15 is closed by an inclined end wall 16 adjacent to a downwardly opening opening 17.

In the tuned state of the spring 7, the extension 20 at the end of the arm 18 engages the notch in the latch lever 21, whereby the latch lever 21 keeps the emptying device in the tuned state. The latch lever 21 is pivotally mounted on a release lever 25 which is normally pivoted to a release-preventing position in which a hole 27 in the release lever 25 is inserted into a fixed pin 26.

The operation of the device is as follows. When the jumper slides the take-off hill in the curve position, the jumper has sufficient time to release the release levers 25 from the locking pins 26. To this end, the hole 27 and the pin 26 can be shaped so that a simple finger press is sufficient to release the lock. Thereafter, the release lever 25 slides along the ski groove in the position shown by the dotted lines in Fig. 2 until, after the jumper's nose, the ski disengages from the base. In this case, the release lever 25 pivots about its axis 23 to the tuning position shown in Fig. 2, where it protrudes below the bottom of the ski 1. Upon lowering, the trigger lever 3 63861 25 immediately hits the ground when it hits the ground and at the same time turns the latch lever 21 about its pivot axis 22 via the stop stop 24, releasing the arm 18 extension 20 from the latch lever 21. The spring 7 strikes the toner container 15 . When the container 15 stops at its outer extreme position, the toner therein tends to continue its journey, with the sloping end wall 16 directing the toner out of the opening 17. The mechanism speed is readily available so that the time taken for the release lever 25 to hit the ground is significantly less than 0. 1 second.

Before the new jump, the container 15 is filled through the opening 17 with loose toner and the container 15 is pushed into the outer tube 14, whereby the spring 7 is tuned and the latch lever 21 is turned to its locking position and the release lever 25 to its securing position.

It is clear that many other structural implementations are possible within the scope of the basic idea of the invention. Thus, for example, the trigger container may be a bellows, in whole or in part, which is struck by a spring-loaded striker to remove toner from the container. Many other embodiments may also be considered within the scope of the following claims.

Claims (2)

4 63861 A device for measuring the length of hill jumps, the device comprising a detector device attached to the hill jump (1), consisting of a container (4) filled with a marker (5) or an ampoule (5a) equipped with a spring-operated emptying device (4, 7, 6, 15) is arranged to be triggered by a trigger responsive to the descent, characterized in that the trigger is a pivotable trigger lever (25) which can be released during descent to a finished position where it remains in contact with the ground until the ski disengages from the platform, the trigger lever pivoting below, whereby in connection with the descent, when the release lever hits the ground, it triggers the emptying device. Device according to claim 1, characterized in that the powdered marker is placed inside a tube (14) in a movable container (15), one end of which is acted upon by a spring (7) and the other end has a downward opening opening (17) bounded by an inclined end wall.