Spring type apparatus for the projecting of footballs and the like

Apparatus for projecting footballs. Footballs are placed in a football container transferred one at a time to a football shooting station. A striking force is applied to the football. The striking force is adjustable; and its point of impact against the football is selectable. Footballs can be projected in identical manner in quick succession. The lower end of the football striking member impacts against a football in the general area of the lowest point of the swinging movement of the football striking member.

BACKGROUND OF THE INVENTION 
The invention relates to a method and apparatus for the projecting or 
shooting of footballs and the like. 
It is a fact at the present time that many footballers have reached such a 
high degree of skill that they must be regarded as true artists in their 
control of the ball. 
Balls are delivered and received with the greatest precision both as 
regards direction and striking force, and are received with head, chest or 
feet. The balls sometimes have to be stopped and for example kicked 
directly to a part of the goal where the goalkeeper is not expecting a 
shot. 
The main difficulty of the footballer is that he has to carry out the 
individual actions with lightning speed in the vicinity of one or more 
opponents, in order to achieve any success at all. Perhaps this is a 
crucial difference between football, and for example, tennis. 
In tennis the opponent is away on the other side. The game consists of a to 
and fro between one player and the other. The tennis player has to be in 
action himself during the entire game and has to receive balls and strike 
them back at a very high rate of frequency. It could almost be said that 
the tennis player himself is a ball striking machine. 
In contrast to the tennis player, the individual footballer has only a 
relatively few opportunities during a game to show his best pieces of 
artistry, as of course evidenced by the response of the spectators. 
The footballer has basically all his body in action except that in the 
negative sense his arms and hands must keep away from the ball whereas in 
the positive sense his other active parts influence the ball. He must 
practise his best performance, and the control of his body and limbs. 
As has been found at the present time, the tennis player has two 
possibilities. He practises with a partner of equal skill. A weaker 
partner is not much use to him since the other player loses almost at 
every shot. The tennis player therefore uses some kind of ball throwing 
apparatus as a second possibility. 
The footballer only has one possibility. He practises in the team. Apart 
from professional footballers it is very often difficult or even 
impossible to collect suitable partners. 
In very recent times many attempts have been made also to provide 
footballers with mechanical partners. But it is not surprising that all 
such attempts have failed, since a machine cannot be a partner in a 
football team, a game in which friend and foe follow literally on one 
another's heels. 
STATEMENT OF PRIOR ART 
Swiss Pat. No. 383,052 published on Mar. 15, 1965, in FIGS. 1 to 3 
discloses a ball shooting apparatus pure and simple for a football. 
It is to be assumed that with the shooting apparatus shown in FIG. 1 of 
that patent in the illustrated position it is in fact possible to project 
the ball even with a striking force which can be adjusted through several 
stages. 
The hammer 10 there strikes horizontally exactly in a horizontal plane 
against the centre point of the ball. The horizontal kick or so-called 
"toe kick" is in fact used but only seldom. The balls are of different 
sizes, and even international rules allow deviations of up to 1 cm in 
diameter. If a particularly small football is placed on the projecting 
apparatus, therefore, the hammer strikes above the horizontal central 
plane. The result is a downwardly directed component of force so that 
depending on conditions, whether it is wet or dry, the ball begins to 
bounce and there are considerable deviations from the intended point of 
aim and even undesirable spinning of the ball. 
Vertical adjustment of the entire apparatus as proposed in FIG. 4 of that 
patent is not a very practicable solution particularly for example for a 
long-range kick. 
In order to adjust shooting angle according to that prior patent a shooting 
plate 1 is to be adjusted upwardly at an angle. 
If the maximum possible inclined position of about 15.degree. is assumed in 
FIG. 1, the hammer 10 must yield in a rearward direction. The hammer must 
do so to such an extent that the direction of the striking force is 
directly approximately at an angle of 30.degree. obliquely to the shooting 
plate 1. 
The proportion of the impact towards the shooting plate which is possible 
even with a horizontal kick is unavoidable to a very much greater extent 
with a normal cross shot. Thus the friction between ball and shooting 
plate becomes an important negative factor. It also must not be forgotten 
that the solution proposed in the prior patent deliberately excluded the 
automation of the sequences of movements, since the machine was 
deliverately given the function of a mechanical player for a type of game 
in which the ball is kicked to and fro. 
SUMMARY OF THE INVENTION 
According to one of its aspects the invention provides a method for 
shooting of footballs and the like comprising the steps of placing a 
plurality of said balls in a ball container, transferring said balls one 
at a time from said container to a ball shooting station, and applying to 
each said ball when at said shooting station a striking force which has 
been adjusted as regards its strength from within a range of different 
strengths and of which the point of impact against said ball has been 
selected from within a range of different points of impact, whereby said 
ball is projected in a selected direction with desired strength. 
According to another aspect the invention provides an apparatus for 
shooting a football or the like comprising: a ball container adapted to 
contain a plurality of said balls, a ball shooting station, transfer means 
for the transfer of balls one at a time from said container to said 
shooting station, striking means adapted to strike said ball, adjustment 
means for adjusting the strength of the force with which said striking 
means strikes said ball, and position selection means for selecting the 
position of the point of impact of said striking force against said ball. 
In specialised training, as far as possible, all techniques of the 
individual player should be practised in rapid succession so that great 
skill can be achieved in a very short time. The foregoing is made possible 
in large measure by the present invention. 
It is an achievement of the present invention that it was recognised that 
the attempts made hitherto to find a mechanical partner for football 
training were directed at the wrong problem. In football the mechanical 
partner need not be the opponent but the own team player who kicks good 
balls towards the practising player to allow him to shoot towards a target 
with the highest degree of body control. Each individual movement sequence 
must be practised and only the countless repeats of the same patterns of 
movement coupled with the necessary talent can lead to the high standards 
of performance seen at the present day. 
Although in retrospect it may seem obvious, it is in fact very surprising 
that it has only now been recognised that the footballer must base his 
practise on repetition when practising special techniques, the use of the 
head, stopping the ball, taking corners etc., so that when practising it 
may be necessary to obtain rates of frequency approximating to those usual 
in tennis, and, what is just as important in football training, it is 
necessary to be able to select the force of the shot. 
It has been found that particularly good results are obtained if the 
individual method steps are taken over as faithfully as possible from the 
football player himself, or at least a technically equivalent solution is 
used. 
It is advantageous if the direction of the striking force relatively to the 
football can be selected in a range between horizontal and directed 
obliquely upwards. It has been found particularly advantageous if the 
point of impact on the ball can be selected from within a range between a 
horizontal plane through the centre point of the ball and an angle of more 
than 15.degree. below that plane. 
It is possible that in some cases it will also be desirable to obtain a 
striking effect directed slightly towards the ground. But in practice by 
far the most frequent case will be a range between horizontal and about 
45.degree. below the horizontal. The striking force may be produced in any 
way. The best results were obtained if the striking force is produced 
mechanically by a striking bar formed from a material of inconsiderable 
mass such as for example wood or the like. 
It is desirable to obtain a slightly resiliently yielding effect at the 
striking bar. It has been found particularly suitable to produce a 
striking force which is brought about by a striking bar which can swing in 
the manner of a clock pendulum and is preferably about the length of a 
human leg, i.e. 70cm to 100cm. The striking bar may be accelerated up to 
the point of impact against the ball and the actual striking force only 
then applied to the striking bar, and in this way the ball is 
followed-through by the striking bar for a slight distance, producing an 
actual after-pressure. 
In the apparatus provided by the invention, the striking means preferably 
comprise a mechanically driven striking bar. In order that the point of 
impact of the striking means on the football and therefore the direction 
in which the ball is projected can be selected, it has been found to be 
best to adjust the height of the shooting station relatively to the 
striking means, more particularly relatively to the striking bar. The 
shooting station itself preferably comprises three support points which 
are all situated below a horizontal plane extending through the centre 
point of the ball. In this way, differences in ball diameter do not lead 
to any great change in the effective relative position of the impact point 
of the striking bar against the ball. The three supporting points are 
preferably adjusted in height along with the shooting station so that 
vertical adjustment of the mechanically moved striking bar can be avoided. 
This solution is simpler and more reliable. The important points for 
accuracy of aim include striking force, direction of striking, point of 
impact of the striking force on the ball, and the precise position of the 
ball relatively to the striking bar. 
In order that the ball can be positioned precisely, it is advantageous to 
construct the shooting station with the three support points as a V-shaped 
channel inclined obliquely downwards towards the striking means. When the 
football is let down with the ball transfer means on to the inclined 
channel it is often unavoidable that the ball will bounce repeatedly. If 
the channel is inclined only to the extent of a few degrees and the 
supporting points are situated about 45.degree. downwards from the centre 
point of the football, the ball strongly tends to move towards the 
striking bar and the third support point. In this way the ball itself 
tends to move into position on the shooting station. 
In a particular constructional form, the V-shaped channel can be turned or 
displaced about a vertical axis at least through a small angle and in this 
way the shooting direction can also be selected in the horizontal plane at 
least to some extent. The ball shooting apparatus can also be mounted on a 
slewing ring or on wheels, and the entire arrangement turned to select the 
horizontal direction. 
The striking bar is preferably of inconsiderable mass and made from a 
springly resilient material such as for example wood and the like. 
Because of the low weight and the springy nature of the striking bar in 
conjunction with the elastic behaviour of the football, the impact has a 
follow-through effect. 
Preferably the striking bar has a striking shoe at the outer end, the shoe 
being rounded in vertical projection towards the point of impact. In this 
way it is possible to keep to the intended point of impact with great 
precision. 
It is interesting that with a wooden striking bar mounted for pivoting 
movement near its upper end, and about the length of a human leg, very 
good results were obtained almost straight away. 
Preferably, the striking shoe is provided at the outer or lower end of the 
striking bar and the shooting station is disposed so as to be only 
slightly above the ground, the striking bar being mounted preferably at 
the upper end on a horizontal pivot pin. In this way "natural" shots are 
deliberately brought about. 
A very similar result can be obtained if the striking bar is mounted at the 
inner end on a vertical pivot and the pivot can even be slightly inclined 
out of the vertical if appropriate. Here again the shooting station is 
preferably only slightly above the ground. In this way certain 
constructional advantages may be obtained. 
Different ways are available for imparting the striking movement to the 
striking means. A simple solution (and thus far also believed to be best) 
is to provide the striking means with a motor-driven cam disc which can be 
brought into engagement with the striking bar preferably through the 
agency of a roller secured on the striking bar. 
The cam disc produced the striking impact. The striking portion of the cam 
disc is formed by a straight preferably radially projecting, short, 
external end surface portion of the cam. A particularly intensive blow may 
be obtained if the surface portion deviates by less than 
10.degree.-15.degree. from a radial line. 
In a preferred embodiment the striking bar and the cam disc may be mounted 
with the pivoting axis of the striking bar and the axis of rotation of the 
cam disc parallel and so as to be capable of axial displacement relatively 
to one another for the purpose of allowing the cam disc to be continuously 
rotated, and a roller secured on the striking bar to be displaced into the 
turning circle of the cam disc for initiating an impact. 
One of the main advantages of the cam disc resides in the fact that it is 
possible to vary the rotational speed in infinitely variable manner by 
means of an adjustable motor drive. 
The revolutions of the cam disc can be adjusted in infinitely variable 
manner to produce different acceleration of the striking bar and thus an 
infinitely adjustable striking intensity. 
The ball container may be mounted above the shooting station, and a 
connecting tube may be provided between the ball container and the 
shooting station. 
Consequently the balls can pass from the ball container by gravitational 
force to the shooting station. The lower end of the connecting tube may 
have a controllable retaining device so that only one ball at a time is 
placed on the shooting station. 
The ball container may have a floor which is substantially flat and 
continuous except for the opening to the connecting tube, and a short 
distance above the floor a preferably intermittently driven multi-part 
star-shaped element rotates for feeding footballs into the opening leading 
to the connecting tube.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Reference will be made first of all to FIG. 1. The complete ball shooting 
apparatus comprises basically a frame 1 and a ball container 2. The unit 
is mounted for movement of wheels 3. But to simplify the drawings only one 
wheel has been shown. 
The shooting or projecting station 4 is at the lower right in the 
illustration, only slightly above the ground level line 5. The striking 
means 6 includes the following main elements: a motor 7, a transmission 8 
which is infinitely variable by adjustment by means of a hand wheel 9, a 
belt pulley 10, a belt 11 and a belt pulley 12 preferably constructed as a 
flywheel. The belt pulley 12 is connected rigidly by way of shaft 13 to a 
cam disc 14. The cam disc 14 is preceded by a circular idler element 15. 
In the constructional form described, a good impact effect is obtained if 
the cam disc is provided with an external, approximately radially 
projecting surface portion 16 which is for the optimum effect within the 
range of angle designated as 17 (in FIG. 9). The principal main element of 
the striking means 6 is a striking bar 20 which at its external upper end 
portion is mounted on a horizontal shaft 21. The striking bar itself 
comprises a wooden leg portion 22 and a metal holder 23 and hence is of 
insubstantial mass and of some resiliency. The leg can of course be made 
of other materials such as plastics material or light metal, but it should 
avoid the presence of excessively large hammer-like masses at the external 
end of the striking bar 20. At the lower end, the striking bar 20 has a 
striking shoe 24 which is preferably made of relatively hard rubber. 
Overall the striking bar 20 is about 85 cm in length. 
Secured on the upper portion of the striking bar 20 is a roller 25 (FIG. 
4). When the striking bar 20 is not in action it is pushed outwards (it is 
shown in the inner position in FIG. 4) so that the roller 25 rolls 
directly on the idler element 15 while motor 7 and transmission 8 drive 
the shaft 13, and a return spring 26 holds the striking bar in this 
inoperative position. 
The shaft 21 is held in the external position in FIG. 4 by a compression 
spring 27. When the circuit of an electromagnet 28 is closed at the switch 
29 the shaft 21 is drawn with the striking bar 20 and the roller 25 
inwards into the rotational circle of the cam disc 14 so that the cam 
initiates a shooting operation when the cam disc 14 rotates. 
When the striking bar 20, or striking shoe 24, has already pivoted beyond 
the vertical position it strikes against the football and follows the 
football for some distance depending on the strength of the impact or the 
rotational speed of the cam disc 14. On the one hand the striking bar is 
stopped by a damping element 30 and prevented from jumping back directly 
by a catch 31 which can be moved in and out by its associated electro 
magnetic means. The catch 31 is withdrawn again only when the striking bar 
with the shaft 21 is pushed again into the outer position and the roller 
25 has been brought into the rotational circle of the idler element 15. 
But of course it is also possible to control all the sequences so that 
they merge into one another. Instead of the catch it is also possible to 
arrange an electrical control button adapted to be operated by the 
striking bar and controlling the pushing of the shaft 21 to the outer 
position. Both the switch 29 and also the electrically operated catch 31 
are connected to a control unit 32 which regulates the individual 
sequences of operation. Naturally it is also possible for the rotational 
speed adjustment of the transmission 8 to be carried out purely 
electrically and to provide for adjustment by a suitable control element 
at the control unit 32. It is simply a question of convenience whether or 
not a cable is even connected from the control unit 32 for remote 
operation by the player so that the player can himself adjust the ball 
deliveries for example as regards strength of shot and frequency, so that 
he does not have to leave his practise station. The frequency of the shots 
can also be controlled by a clockwork mechanism and subjected to 
individual control, for example delayed action. Of course the shooting 
station 4 can also be adjusted in the vertical direction by motor means 
and thus also remote controlled. 
In the illustrated constructional example the shooting station 4 can be 
adjusted by means of a draw rod 33 by means of a toothed wheel 34 with 
crank 35, so that the shooting angle can be adjusted. 
FIG. 5 shows approximately the lowest position for the football relatively 
to the striking shoe 24 for a horizontal shot. 
FIG. 6 shows the football raised a few centimeters as compared with FIG. 5. 
Already when the striking shoe 24 strikes the ball, the striking force is 
directed obliquely upwards by an angle .alpha.. The striking force in this 
case strikes through the ball centre point at an angle .beta. of about 
30.degree. relatively to the horizontal. 
FIG. 7 shows the outermost position of the striking shoe 24 of FIG. 6 in 
which the ball leaves the striking shoe 24. The angle at which the ball is 
shot in the illustrated example is not quite the same as the angle .gamma. 
of the direction of the striking force, but rather an angle .delta. 
somewhat smaller than .gamma. since very many influencing factors such as 
the elasticity of the ball, the elasticity of the striking bar 20 etc. 
also come into play. However very high consistency of aim was achieved 
with a first prototype ball shooting apparatus and it was found that 
adjustment values obtained by trial and error are quite sufficient for 
practical use. 
The ball container 2 is made from thin iron section members 40 and has a 
capacity for a large number of footballs, for example 20-50 footballs. 
However the ball shooting apparatus can be used e.g. with as few as four 
or five balls. But this simply is a question of convenience to avoid the 
need for another person constantly to replace balls. 
As FIG. 8 shows, a rotating five-armed star-shaped element 41 is arranged 
in the ball container 2. It is mounted a short distance above the floor of 
the container. Directly above an opening 42 several guard rails 43 are 
mounted so that a football pushed by the star-shaped element 41 
mechanically to in front of the opening 42 is not blocked by footballs 
situated above, and can fall without hindrance through the opening 42 into 
the connecting tube 44 situated below. The upper portion of the connecting 
tube 44 is formed by rods so that from a distance it is possible to see 
when the last ball has been taken from the ball container 2. 
The star-shaped element 41 is controlled by means of a drive 45 which is 
preferably controlled only intermittently in step with the other 
operations by the control unit 32. 
The connecting tube 44 as is shown in FIG. 2 comprises at its lower mouth 
46 a ball placing device 47. In the illustrated construction a simple 
solution has been found very advantageous. From the connecting tube 44 the 
footballs are let down individually, also under control of the control 
tube 32, by lifting a holding arm 54 for a short space of time, namely 
being let down into the shooting station 4 which is constructed as a 
channel 53. The channel 53 comprises two side walls 48 which are inclined 
at about 45.degree. and which provide two supporting points 49 and 50 for 
the football. The third supporting point 51 which is also below the ball 
centre is provided by the plate 52 welded-on obliquely on the side wall 
48. As FIG. 1 shows, the channel 53 is inclined slightly towards the rear. 
An individual ball released by the holding arm 54 rolls into the channel 
53 and very quickly rests on the three supporting points 49,50 and 51 and 
in this way is positioned very accurately for the striking shoe 24. For 
shots at a high rate of frequency, the ball placing device can be 
constructed with a mechanism whereby the ball is placed by jaws directly 
on the supporting points. In this way bouncing of the ball is prevented. 
The holding arm 54 is operated at the desired rate by means of a link 56 
secured to a common pivot 55, the link being actuated by way of a 
connecting rod 57 from an electromagnet 58. The rate is synchronised with 
the other movements by the control unit 32. 
As FIG. 1 shows, the entire ball shooting apparatus is constructed as a 
carriage which can be pushed by a handle 60 and can also be turned in any 
desired direction. In actual use, most frequently the carriage will be 
placed in a position which is appropriate to the desired target and after 
adjusting the necessary striking force, by adjusting the rotational speed 
of the transmission 8, the shot angle by vertical adjustment of the 
shooting station 4, one or two test shots will be delivered. Usually small 
subsequent corrections will be required, and then the series of practice 
shots can be played through by manual triggering with a simple apparatus. 
If a relatively long series of very hard shots is required, it may be 
necessary to anchor the ball shooting apparatus to the ground. The 
carriage is preferably constructed as a three-wheeler with the single 
wheel steerable. 
In FIG. 9 the cam disc is shown on a larger scale. Good results can be 
obtained if the cam disc 14 is given a simple form as is shown by the 
broken line E. But particularly good shots are obtained if the operative 
parts of the cam disc 14 have an acceleration cam portion A and an actual 
striking cam portion C. Depending on particular conditions, the cam disc 
can be adjusted relatively to the striking bar 20 so that the end of the 
acceleration cam portion A coincides with the striking of the striking bar 
against the ball. But a stronger shot is obtained if the transition 
portion B is in engagement with the roller 25 already before the striking 
bar strikes against the ball, so that when the striking shoe 24 hits 
against the ball the striking force can already be profitably used, and a 
more sustained impact produced. 
It has been found very advantageous more particularly for powerful shots if 
the striking shoe follows the football by a distance equivalent to about 
the length of a shoe or even more in order to maintain the impact on the 
ball over this distance. The acceleration path of the striking bar 20 or 
the striking shoe 24 in the construction illustrated in FIG. 1 amount to 
more than a foot length. 
In actual practice it is of great advantage to arrange all the control 
elements at the side of the ball shooting apparatus remote from the 
shooting direction, so that an operator can immediately see the result of 
the shot and can correct the setting.