[0001] This invention relates to a lure device. In particular it relates to a lure device
for use on a greyhound track.
[0002] Greyhound tracks are well known. They generally comprise a circular or oval shaped
arena surrounded by a spectator area. In the arena, greyhounds are raced from respective
traps, located at a start line, to a finish line a predetermined distance away around
the track. In order to encourage the dogs to race, a lure is provided which, generally
speaking, comprises a silhouette of a hare fixed fast to an endless cable. The cable
is usually buried in suitable casing underground with a slot in the casing for enabling
a support connecting the lure to the cable to pass through the casing. The lure is
set in motion by means of a suitable motor housed in a control centre located at some
suitable point on the track which drives the cable on the circuitous pathway around
the perimeter of the track. The velocity of the cable will determine the velocity
of the lure and there is usually suitable means for varying the velocity of the cable
depending on the velocity of the dogs chasing the lure.
[0003] The above described system, with slight variation has been in existence for some
considerable time. The known system has been found to be generally reliable but only
where the track is primarily grass or at least not having a coating of sand thereon.
Sand tracks are becoming increasingly popular due to the relative ease of maintenance
and also because it promotes a faster velocity from the dogs. However, a significant
disadvantage of sand tracks is that the sand can easily enter the slot through which
the lure support passes thereby causing significant maintenance problems and frequent
breakdowns in operation of the system. One way of overcoming this problem has been
the installation of the known system on the internal perimeter of the track as distinct
from the external perimeter. However, this internal position of the lure is not favoured
by the organisers or by the punters and hence is not very popular.
[0004] It is an object of the present invention to overcome these problems.
[0005] The invention, therefore provides a support apparatus for supporting a lure which
apparatus comprises a trolley having wheels for engaging with one or more rails; a
drive pulley and two associated idler pulleys; a drive means for the drive pulley;
the arrangement being such that when mounted on the or each rail, the drive pulley
and the associated idler pulleys are interengageable with an endless stationary cable
so that upon actuation of the motor means the trolley moves along the rails relative
to the stationary cable.
[0006] The invention will be understood in greater detail from the following description
of a preferred embodiment thereof given by way of example only and with reference
to the accompanying drawings in which:-
Figure 1 is a perspective view of an apparatus for supporting a lure according to
the invention;
Figure 2 is a front elevation of the apparatus of Figure 1 of the drawings;
Figure 3 is a plan view of the apparatus of Figure 2 of the drawings;
Figure 4 is a side elevation of the apparatus of Figure 1 of the drawings;
Figure 5 is a detail of part of a support system for the apparatus of Figure 1 of
the drawings; and
Figure 6 is a perspective and detailed view of a part of the apparatus of Figure 1
of the drawings.
[0007] Referring now to the drawings, there is shown an apparatus 10 according to the invention
which comprises a trolley 50 having a support element 51, a motor (not shown) mounted
in a housing 54, a first pair of wheels 55; a second pair of wheels 56, a drive pulley
57 and idler pulleys 58, 59. The motor, which is electrically powered, is mounted
on the support element 51 by means of a pair of brackets 60, 61. An electrical cable
62 is connected to the motor the free ends 63, 64 of which cable 62 are connected
to a respective electrical brushes 65, 66. Each brush 65, 66 is hingedly attached
to a respective brush support member 52, 53.
[0008] The brush support member 52 comprises a housing 72 having a spring (not shown) which
biases a plunger 73 outwardly from the housing there being conventional means (not
shown) to retain the plunger 73 in the housing 72. Essentially, therefore, the plunger
73 is slidably engageable in the housing 72. The free end of the plunger 73 is pivotally
attached to a lug 74 to which is fixed fast the brush 65. The brush 65 is electrically
isolated from the lug 74. The housing 72 is pivotally attached to one end of a brush
support member 75 the other end of which is attached to the plate 51. The brush support
53 is similarly constructed and supports the brush 66.
[0009] Also attached to the support element 51, by means of respective axles 76, are the
pairs of wheels 55, 56 which are of the flanged type. Projecting from the motor is
an axle 67 on which is mounted the drive pulley 57. The support element 51 also has
mounted thereon the idler pulleys 58, 59. The axes of the pulleys 57, 58, 59 are in
substantially parallel spaced apart relationship being transverse to the axes of the
wheels 55, 56. The location of the axes of the pulleys 57, 58, 59 are such as to form
a notional triangle with a notional line joining the axes of the idler pulleys 58,
59 forming the base of the triangle and the axis of the drive pulley 57 forming the
apex of the triangle.
[0010] The pulleys 58, 57 are substantially coplanar; the pulley 59 is slightly non-coplanar
relative to the pulley 57.
[0011] Pivotally attached to the support plate 51 by means of a lug and pin arrangement
78 is first arm 68 from which projects a skid 69. The arm 68 has one end of a spring
70 attached thereto the other end of which spring 70 is attached to a second arm 71
attached to the plate 51. Further support for the arm 68 is provided by an L-shaped
leg member 79 one end of which is welded to or is integral with the arm 68 the other
end of which member 79 is pivotally attached to the plate 51 by a lug and pin arrangement
80. Also attached to the arm 68 is a lure 77.
[0012] To use the apparatus 10, there is installed preferably on the outer perimeter of
a greyhound track a series of main frame supports 11 at distances of approximately
2.5m from each other.
[0013] Each support 11 is substantially U-shaped having legs 12 and 15 interconnected by
a connecting arm 14. The leg 12 is longer than the leg 15 and thus the end of the
leg 12 is embedded in a concrete base 13 located below the ground 13
a. The end of the leg 15 is located a distance above the ground 13
a. Mounted on the leg 15 are two nut and bolt arrangements 16
a, 17
a for supporting respective rails 16, 17. The rails 16, 17 are in substantially parallel
spaced apart and positioned one above the other.
[0014] Mounted on the leg 12 by means of a nut and bolt arrangement 19
a is an L-shaped bracket 19 having legs 20, 21. The leg 21 supports an electrically
insulating medium 25 having electrically conductive strips 22, 23 embedded therein,
each strip 22, 23 having an exposed surface. Mounted on the leg 15 and located between
the rails 16, 17 is a cable support element 18. The rails 16, 17, the L-shaped bracket
19, the support medium 25, the strips 22, 23 are all endless and circumscribe the
outer perimeter of the greyhound track. If desired an endless facia 100 could be attached
to the legs 15, so as to cover the rails etc. from the general view of the public.
[0015] Finally, there is provided a cable 24. The cable 24, which would be endless would
simply rest on the supports 18. The cable 24 would be of the type in which a length
of 500 metres would have a weight of about 65kg.
[0016] The apparatus 10 is lifted into position so that the wheels 55 rests on the rail
16 and the wheels 56 rest on the rail 17. The cable 24 is engaged with the drive pulley
57. In engaging the drive pulley 57, it is important that the cable 24 be in tangential
arrangement relative to the pulley 57 at two locations and further that the cable
passes virtually around the entire circumference of the pulley 57. The pulleys 58,
57 are substantially coplanar but because the pulley 59 does not share the same plane
as that of the pulleys 58, 57, that part of the cable 24 which connects the pulley
58 with the pulley 57 is not in friction engagement with that part of the cable 24
which connects the pulley 57 with the pulley 59.
[0017] The electric brushes 65, 66 are placed in electric contact with respective strips
22, 23. The strips 22, 23 are, at some suitable location, connected to a source of
electricity controlled by a switch and/or suitable current varying means so as to
vary the current and/or voltage in the strips 22, 23.
[0018] When electricity is applied to the strips 22, 23, the motor on the trolley 50 is
actuated thereby causing the drive pulley 57 to rotate. Rotation of the drive pulley
57 causes the trolley 50 to move relative to the stationery cable 24 along the rails
16, 17 thereby causing the trolley to move around the greyhound track. The idler pulleys
58, 59 served to guide the cable to and from the drive pulley. The velocity of the
trolley 50 may be controlled by varying the current or voltage applied to the strips
22, 23. The purpose of the skid 69 is to prevent the lure 77 from being damaged through
contact with any undulating ground. The skid 69 is in contact with the ground and
serves to push the arm 68 against the bias of the spring 70. It will be appreciated
that the arm 68 projects beyond the plane of the facia and hence the lure 77 if located
in front of the facia 100 will be easily silhouetted against the preferably plain
background of the facia 100.
[0019] The advantages of the invention include the fact that when installed in a track having
a sand base, little of no damage is caused to the apparatus 10 by the sand given the
relatively simple construction thereof and the lack of movement of the cable 24. By
mounting the wheels 55, 56 and the pulleys 57-59 in suitable bearings and further
given the fact that the apparatus is located a distance above the ground, the effect
of the sand is reduced so considerably as not to present the type of problem heretofore
encountered in such installations.
[0020] The invention is not limited by or to the specific embodiments described which can
undergo considerable variation without departing from the scope of the invention.
1. A support apparatus for supporting a lure which apparatus comprises a trolley having
wheels for engaging with one or more rails; a drive pulley and two associated idler
pulleys; a drive means for the drive pulley; the arrangement being such that when
mounted on the or each rail, the drive pulley and the associated idler pulleys are
interengageable with an endless stationary cable so that upon actuation of the motor
means the trolley moves along the rails relative to the stationary cable.
2. A support apparatus as claimed in claim 1 wherein the axis of drive pulley and the
axes of idler pulleys are in substantially parallel spaced apart relationship being
transverse to the axes of the wheels.
3. A support apparatus as claimed in claim 2 wherein the axes of the pulleys provide
for the respective apices of a notional triangle.
4. A support apparatus as claimed in claim 2 or claim 3 wherein the idler pulleys are
substantially co-planar and the drive pulley is non-coplanar relative to the idler
pulleys.
5. A support apparatus as claimed in any of claims 1-4 which further comprises one or
more support rails for enabling the wheels to traverse therealong and means for enabling
an electrical connection to be made from the support rail so as to power the motor.
6. A support apparatus as claimed in claim 5 which further comprises a plurality of u-shaped
support elements each having legs of unequal length for supporting the rail or rails,
the longer leg being ground engaging and the shorter leg terminating a distance above
the ground, each support having means for enabling the cable to rest thereon when
not in engagement with the pulleys.
7. A support apparatus as claimed in claim 6 which further comprises a facia mounted
on the shorter leg so as to conceal the rails and the trolley from general view, the
facia terminating above the ground so that an arm, one end of which is attached to
the trolley and the other end having the lure attached thereto, does not, during travel
of the trolley, engage with the shorter leg or the facia thereby permitting the lure
to be seen against the background of the facia.
8. A support apparatus as claimed in claim 7 wherein the arm is pivotally attached to
the trolley, biasing means is provided for urging the arm and hence the lure in a
ground engaging direction, the lure having a ground engaging skid so that in use,
the skid serves to prevent the lure from engaging with the ground which skid traverses
the ground including undulating ground which provides a force acting against the biasing
means.