FR2673507A1 - Improvements to detonator apparatuses for scaring off animals which damage crops - Google Patents

Abstract

Improvements to detonator apparatuses for scaring off animals which damage crops, of the type comprising a frame (1) intended to be fixed on the ground, the said frame including a support (6) provided with a vertical bearing in which there freely rotates a shaft (7) secured to a median intermediate point of a bar (8) supporting, at each end, an explosion chamber (10) extended by a grenade sleeve (11), a control mechanism (12) inserted between a gas bottle (14) and the explosion chambers (10) for distributing in the latter a certain volume of gas and controlling the ignition (inflammation) of the latter at offset time intervals in each chamber, which are characterised in that they include a decoy (lure) (20) resembling a human figure fixed on the bar (8).

Description

 The present invention relates to improvements to detonator devices for keeping pests away from crops.

 The invention relates, more particularly to improvements to the apparatuses described in the French patent No. 82 04 088 of March 11, 1982 and published under No. 2,522,930 in the name of the applicant.

 This patent describes an apparatus comprising a frame, intended to rest on the ground, and supporting a crazy rotating vertical axis and integral with a median intermediate point of a horizontal bar, each end of which supports an explosion chamber extended by a paper clip.

Each explosion chamber is connected by a line to the regulator of a bottle of liquid gas, and means being provided for when each explosion chamber has received a certain volume of gas, ignite it with a certain offset in the time and, the blunderbuttons being oriented in opposite directions. Thanks to this structure on the one hand, the device produces two offset detonations and, the angular position of the explosion chambers and the blunderbuss being modified, after each explosion the detonations are heard differently which makes the device very efficient.

 One of the aims of the invention is to perfect such an apparatus in order to make it even more effective.

 The improvements according to the invention are aimed at detonating devices for keeping pests away from crops of the type comprising a frame intended to be fixed to the ground, said frame comprising a support provided with a vertical bearing in which a fixed axis rotates freely. from a median intermediate point of a bar supporting at each end an explosion chamber extended by a blunderbuss, a control mechanism inserted between a gas cylinder and the explosion chambers to distribute therein a certain volume of gas and controlling the ignition thereof at staggered time intervals in each chamber, said improvements being characterized in that they comprise a decoy affecting a human silhouette fixed on the bar.

 Preferably, the lure is constituted by a plate reinforced by profiles and provided with flanges for its fixing on the bar.

 So that the assembly can rotate more freely and also with the action of the wind, one of the edges of the lure is folded in one direction and the opposite edge in the opposite direction.

 Finally, the lure affects the silhouette of a hunter.

The invention will now be described in more detail with reference to a particular embodiment given by way of example only and shown in the accompanying drawings, in which
Figure 1 is an exploded perspective view of an improved apparatus, according to the invention.

 Figure 2 is a perspective view on a larger scale of a detail of the apparatus according to the invention.

 The apparatus of FIG. 1 comprises a frame 1 provided with feet 2 terminated by points 3 intended to be stuck in the ground. In order to ensure good stability of the device, there are provided guy lines 4 and stakes 5 for fixing said guy lines 4 in the ground.

 The feet 2 are integral with a support 6 comprising a vertical bearing in which a pin 7 freely rotates, integral with a bar 8 each end of which supports an explosion chamber 10 extended by a blunderbolt 11.

 The bar 8 supports a control mechanism 12 which receives gas from a pipe 15 connected to a pressure reducer 13 connected to a gas cylinder 14. The control mechanism sends gas through ducts 17 into the explosion chambers 10 and controls the ignition of said gas in said chambers when the latter constitute a certain volume of gas.

 The mechanism 12 is arranged so that the explosion takes place with a certain time lag in one of the chambers 10 relative to the other. At each explosion, taking into account that the blunderbuttons 11 are arranged in the opposite direction, by reaction, the bar 8 pivots on the axis 7.

 Thus, the noise of each detonation is perceived differently which makes the device very efficient.

 We know that, in particular, certain birds know perfectly how to recognize the silhouette of a person who represents for them a danger, for example a hunter, of another unarmed person. The invention therefore provides for mounting on the bar 8 a lure 20 consisting of a metal plate cut out to represent the silhouette of a hunter, the lure 20 comprising a notch 22 so as to enchase the mechanism 12 and determining two branches 24 and 28, on the branch 24, being welded on either side of the reinforcing profiles 26 secured to threaded rods 23, while on the other branch 28, there are two profiles 27 fixed one on a face and the other on the other face, these sections 27 being integral with two threaded rods 29.

 The threaded rods are intended to receive nuts 43 with interposition of plates 41 pierced with holes 42 for the passage of said threaded rods so as to constitute flanges for fixing the lure on the bar 8.

 On one face, the lure 20 has a profile 30 welded in order to give it greater rigidity, while the free edge 34 of the branch 24 is folded on the side of a face along a line 31.

 An edge 33 of the lure is folded along a line 32, this edge being folded towards the face opposite to that of the side of which the free edge 34 is folded. Thus, the wind makes it possible to rotate the assembly.

 The lure has holes 37 which are crossed by screws 38 receiving nuts 39 for fixing a bar or rod 40. Thus, the lure affects the silhouette of a hunter.

 Of course, the invention is not limited to the embodiment which has just been described and shown. Many detailed modifications can be made without departing from the scope of the invention.

Claims (1)

 10- Improvements to detonating devices for keeping pests away from crops of the type comprising a frame (1) intended to be fixed to the ground, said frame comprising a support (6) provided with a vertical bearing in which a pin ( 7) secured to a median intermediate point of a bar (8) supporting at each end an explosion chamber (10) extended by a blunderbuss (11), a control mechanism (12) inserted between a gas cylinder ( 14) and the explosion chambers (10) for distributing therein a certain volume of gas and controlling the ignition of the latter at staggered time intervals in each chamber, characterized in that they comprise a decoy ( 20) affecting a human silhouette fixed on the bar (8).  20- Improvements to detonator devices according to claim 1, characterized in that the lure (20) is constituted by a plate reinforced by profiles (26, 27, 30) and provided with flanges for its attachment to the bar (8) .  30- Improvements to detonator devices according to claim 1, characterized in that one of the edges (34) of the lure is folded in one direction and the opposite edge (33) in the opposite direction.  40. Improvements to detonator devices according to claim 1, characterized in that the lure (20) affects the silhouette of a hunter.