U.S. patent number 3,623,065 [Application Number 04/799,447] was granted by the patent office on 1971-11-23 for arrow hit location indicator.
This patent grant is currently assigned to The Brunswick Corporation. Invention is credited to Bradford J. Baldwin, Anthony J. Gratzky, Gilbert M. Rockwood, Jack A. Russell.
United States Patent |
3,623,065 |
Rockwood , et al. |
November 23, 1971 |
ARROW HIT LOCATION INDICATOR
Abstract
An automatic archery range including a firing line or shooting
station from which arrows are fired in a flight path towards a
penetrable target, a self ejecting arrow receiving and holding
backstop behind the target, an arrow collector beneath the
backstop, arrow return means for receiving arrows from the
collector and returning them to a quiver adjacent the firing line
or shooting station, a target monitor observable by an archer from
the shooting station or firing line for indicating to the archer or
to spectators where the arrows have hit the target and means for
scanning the flight path for sensing the position on the target hit
by fired arrows and operating the target monitor.
Inventors: |
Rockwood; Gilbert M. (Muskegon,
MI), Russell; Jack A. (Muskegon, MI), Baldwin; Bradford
J. (Muskegon, MI), Gratzky; Anthony J. (Muskegon,
MI) |
Assignee: |
The Brunswick Corporation
(N/A)
|
Family
ID: |
25175932 |
Appl.
No.: |
04/799,447 |
Filed: |
February 14, 1969 |
Current U.S.
Class: |
340/313; 273/371;
273/395 |
Current CPC
Class: |
F41J
3/0004 (20130101); F41J 5/02 (20130101); F41J
3/02 (20130101) |
Current International
Class: |
F41J
5/00 (20060101); F41J 5/02 (20060101); F41J
3/02 (20060101); F41J 3/00 (20060101); A63b
071/06 () |
Field of
Search: |
;340/323 ;273/12.2R |
References Cited
[Referenced By]
U.S. Patent Documents
|
|
|
3401937 |
September 1968 |
Rockwood et al. |
|
Primary Examiner: Caldwell; John W.
Assistant Examiner: Swann, III; Glen R.
Claims
We claim:
1. An indicating divide comprising: a face adapted to have markings
thereon, a first servomotor mounted adjacent the periphery of said
face and operatively connected to a first arm, a second servomotor
mounted adjacent the periphery of said face and spaced from said
first servomotor; a second arm operatively connected to said second
servomotor and mounting a movable carriage; said carriage being
provided with a visible indicator for movement across said face,
and means associated with said carriage and said first arm for
moving said carriage on said second arm thereby moving said
indicator to a position on said face dictated by the response of
said servomotors to an input signal.
2. The invention of claim 1 wherein constant tension means are
provided for biasing said carriage to an extremity of said second
arm.
3. An indicating device adapted to be energized by a remotely
generated input signal comprising: face means for receiving indicia
arranged in at least two dimensions; servo means for receiving said
input signal and responding thereto, said servo means comprising at
least two servomotors; movable means operatively associated with
each of said servomotors for movement adjacent said face means by
said servomotors in response to an input signal; and indicating
means operatively associated with said movable means for indicating
a point having at least two coordinates on said face means.
4. In an apparatus for indicating the location of a projectile hit
in a target, an indicator face bearing a target pattern, an
indicator element adapted for movement about the indicator face, a
first arm pivotally mounted adjacent the indicator face to swing
across the pattern area, a second arm pivotally mounted adjacent
the indicator face to swing across the pattern area, means for
moving the indicating element as a function of movement of both
arms, and means for driving the arms.
5. In an apparatus for indicating the location of a projectile hit
in a remote target as a function of two angular coordinate
measurements of hit sensing means associated with the target, an
indicator face bearing a target pattern, an indicator carriage
adapted for movement about the indicator face, a light on the
carriage to indicate a hit location relative to the target pattern,
a first arm pivotally mounted adjacent the indicator face to swing
across the area of the pattern, a second arm pivotally mounted
adjacent the indicator face to swing across the pattern area to
positions intersecting the first arm, means mounting the indicator
carriage on one of said arms to move angularly with the arm and to
move longitudinally along the arm, means biasing the carriage in
one direction along the arm on which it is mounted, cooperating cam
and follower means on the carriage and the other arm for moving the
carriage along the mounting arm in opposition to the biasing means,
a first electric motor connected to drive the first arm as a
function of one coordinate measurement, and a second electric motor
connected to drive the second arm as a function of a second
coordinate measurement.
6. In an apparatus for indicating the location of a projectile hit
in a target as a function of two coordinate measurements, an
indicator face bearing a target pattern, an indicator carriage
movable about the indicator face and having an element to indicate
a hit location relative to the target pattern, a first arm
pivotally mounted adjacent the indicator face to swing across the
pattern area to represent one coordinate measurement, a second arm
pivotally mounted adjacent the indicator face to swing across the
pattern area to positions intersecting the first arm to represent a
second coordinate measurement, means mounting the carriage on one
of the arms for movement controlled by both arms to positions
adjacent the intersection of the arms, and separate means for
driving the arms variable angular distances.
7. A combination as defined in claim 6 where the means for driving
the arms includes a first motor connected to drive the first arm as
a function of one coordinate measurement and a second motor
connected to drive the second arm as a function of a second
coordinate measurement.
8. A combination as defined in claim 6 including means biasing the
carriage along said one arm, and cooperating cam and follower means
on the carriage and other arm controlling the position of the
carriage along said one arm.
9. A combination as defined in claim 8 wherein said biasing means
comprises a spring having one end connected to the outer end of
said one arm and the other end connected to the carriage to urge
the latter outwardly along said one arm.
Description
This application contains claims to nonelected subject matter
disclosed in Rockwood et al. application Ser. No. 432,787, filed
Feb. 15, 1965, now U.S. Pat. No. 3,401,937, issued Sept. 17,
1968.
An object of the invention, in general terms, is to provide a new
and improved archery range.
Another object of the invention is to provide a novel archery game
providing enjoyment for the archer and designed to maximize
participation.
Another object of the invention is the provision of an improved
target monitor in close proximity to the archer for indicating the
point of contact of an arrow with the target wherein the target
monitor indicator is operated by a servo mechanism in the scanning
system so that exact placement of the arrow can be remotely
determined by the archer such that placement of the next shot can
be based on the result of the previous effort without interruption
of the game.
Other objects of the invention will become readily apparent from
the following detailed description taken in connection with the
drawings wherein:
FIG. 1 is a longitudinal section through a preferred form of the
invention, approximately along the line 1--1 of FIG. 2;
FIG. 2 is a transverse section of FIG. 1 taken approximately along
the line 2--2;
FIG. 3 is another transverse section of FIG. 1 taken approximately
along the line 3--3;
FIG. 4 is a side view of a preferred form of the backstop and
scanning mechanism of the invention;
FIG. 5 is a front view of a backstop and scanning mechanism, used
in a form of the invention;
FIG. 6 is a schematic diagram of a form of the scanning circuitry
used in the invention;
FIG. 7 is a plan view of the scoreboard and associated indicating
mechanism;
FIG. 8 is a front elevation of the scoreboard and associated
indicating mechanism; and
FIG. 9 is a side view of a fragment of FIG. 8.
As shown schematically in FIG. 1, an archery range according to the
invention includes a shooting station or firing line 20 manned by
archer 22 firing arrows 24 at a target 26 spaced therefrom. Behind
the target 26 is a self-ejecting backstop mechanism generally
designated as 28. Below the target 26 and the backstop mechanism
28, is a collector 29 formed of a plate sloping forwardly and to
one side as seen in FIG. 2. An arrow return mechanism is in close
proximity to the collector 29 and comprises a pair of narrowly
spaced belts 30a, 30b which feed to a conveyor 32 which in turn
leads to an upwardly inclined pair of narrowly spaced belts 34a,
34b. The inclined belts 34a, 34b empty into a quiver, generally
designated 36, adjacent the archer 22. A target monitor 38 is
placed near the archer 22 for indicating arrow hits on the target
26.
The target 26 may comprise the usual penetrable target sheets,
having the desired target markings thereon, placed on the forward
grid 50 of the backstop mechanism 28. Preferably, however, the
target 26 is formed of a facing of a self-healing nature as is well
known in the art. The invention contemplates the use of a projector
27 for projecting suitable target markings onto the screen facing.
In this way the projector 27 may be programmed with a number of
different target marking which may be remotely selected for
projection on the target by the archer.
The self-ejecting backstop mechanism 28 of the invention is
illustrated in greater detail in FIG. 4. It comprises a pair of
spaced grids 50, backed by a movable plate 52 formed of any
material sufficiently hard and thick to preclude penetration by the
fired arrow and, yet able to absorb the kinetic energy of the
arrow. On the upper and lower extremities of the plate 52 are
mounted carriages 62 having wheels 64 on tracks 66. The carriages
62, wheels 64 and tracks 66 serve to movably mount the plate 52 for
movement toward and away from the grids 50. The mechanism for
moving the plate 52 toward and away from the grids 50 comprises a
member 54 attached to the back of the plate 52 and having therein
an elongated slot 56. An eccentric pin 58 is received in the slot
56 and is rotated by a conventional one revolution motor 60.
Actuation of the one revolution motor 60 will result in the plate
52 reciprocating toward and away from the grids 50. The apertures
in the grids preferably comprise a high percentage of the total
area of the grids so as to minimize the possibility of a direct hit
of the solid portions of the grid by an arrow causing the arrow to
bounce straight back towards the archer.
The invention also contemplates that the distance between the plate
52 in its "away" position and the forwardmost grid 50 or the target
26 is less than the distance between the tip of an arrow and the
beginning of the fletching. When such spacing is used the fletching
of the arrow never comes in contact with portions of the grid 50,
thus precluding damage to the fletching. Finally, the size of the
apertures in the grids 50 are such as to loosely receive an arrow
and to retain the arrow therein substantially only under the
influence of gravity. Thus, a fired arrow, will lodge loosely in
the apertures of the grids 50 after being brought to a halt by its
contact with the plate 52. At some predetermined time the one
revolution motor 60 is actuated causing the plate 52 to move toward
the grids 50. This causes the arrows to be slidably ejected from
the grids 50. It will be appreciated that through suitable means,
such as a transducer and a stepping switch, the backstop can be
programmed to eject arrows after any predetermined number have been
halted thereby. As stated previously, the target face and the
forwardmost grid 50 are intended to be substantially coextensive.
Thus, it will be seen that use of a backstop according to the
invention results in the arrows partially protruding from the
target where they may be observed by the archer until such time as
plate 52 is actuated and the arrows are automatically ejected.
Accordingly, this feature of the invention provides retention for
observation purposes as well as for automatic ejection.
Placed about the arrow flight path, as a safety feature, is
deflector 40. Depending on the shape of the target 26, the walls of
the deflector 40 may take the shape of a truncated pyramid as shown
in FIG. 1, or the frustum of a cone. Associated with the deflector
walls 40 is a contact transducer 42 or a microphone of sufficient
sensitivity to determine when the deflector walls 40 have been hit
by an arrow 24. Through conventional wiring such as a relay, the
signal induced can be made to preclude operation of the scanning
circuit and to show up on the target monitor 38 has a miss, thus
informing the archer 22 that his last shot has been misdirected.
This feature is necessary as the deflector walls 40 are arranged to
deflect the arrow into the backstop 28 past the scanning mechanism
and such a shot would show up as a score unless the fact that it
has previously hit the deflector 40 is somehow indicated to the
archer 22.
To enable the archer 22 to be constantly aware of his score with
each arrow shot, a target monitor 38 is arranged in close proximity
to the archer as seen in FIG. 1. By means of a mechanism described
below, the target monitor 38 indicates to the archer where his last
arrow has hit the target. To feed appropriate signals to the target
monitor 38 to indicate the location of the arrows corresponding to
the hits on the target 26, the invention provides a scanning
mechanism generally designated 25 located ahead of the target 26.
As shown more clearly in FIGS. 4 and 5, this scanning mechanism
comprises a pair of systems, each system being identical with the
other, wherein one system determines one angular coordinate of the
position of the arrow within a flight path and the other system
determines another angular coordinate of the position of the arrow
within the flight path. Since the two systems are identical, only
one will be described in detail. It should be noted that as used
herein, the term "flight path" refers to the general area, both in
front of and behind the target 26, in which arrows are intended to
be fired, as contrasted to the line of flight taken by any given
arrow.
An arcuate mirror 86 (see FIGS. 4 and 5) is placed about the
periphery of the flight path near the target 26. At the focal point
of the mirror is placed a light source providing a rotating beam of
light. This function is achieved by means of an electric motor 70
rotating a drum 74 having equally spaced apertures 78 in its
periphery. Mounted within the drum 74 is a light source 82. A first
photocell 90 is disposed along an edge of the flight path so as to
be energized by the rotating light beam as it begins its sweep
across the flight path. A second photocell 94 is disposed at the
focal point of the mirror adjacent the light source in such a
position as to be energized by the light beam upon reflection of
the beam by the mirror 86 at all times during the sweep of the
light beam across the flight path. In order to accommodate the
placing of both the light source and the second photocell at the
point of the mirror, both are slightly inclined to the vertical but
in opposite directions (see FIG. 4) such that a light beam
reflected from the mirror will not retrace its path back to the
source, but will diverge slightly therefrom and strike the second
photocell. A third photocell 98 is disposed along another edge of
the flight path in such a position as to be energized by the light
beam upon completion of its sweep across the flight path. By this
arrangement, it is apparent that the first photocell 90 will be
energized only at the beginning of the sweep of the light beam
across the flight path, and that the third photocell 98 will be
energized only at the end of the sweep of the light beam across the
flight path. By virtue of reflection of the light beam by the
mirror 86, it is apparent that the second photocell 94 will be
energized continuously throughout the sweep of the light beam
across the flight path until the beam is interrupted at some point
in that sweep. This interruption occurs when an arrow 24 passes
through the flight path. Of course, in order for this sensing means
to be effective, the time required for a single sweep of the beam
across the flight path must be less than the time taken by an arrow
in passing wholly through a plane perpendicular to its line of
flight. For example, if it is considered that the shortest arrow
commonly used is of a length of 24 inches, and the maximum velocity
of the arrow upon reaching the target is 350 feet per second, then
it is apparent that the time for the sweep must be no longer than
one one-hundred and seventy-fifth of a second. Accordingly, a drum
74, having five equally spaced apertures 78 must be rotated at 2100
r.p.m. in order to achieve a sweep time for one beam of one
one-hundred and seventy-fifth of a second. Obviously, however,
other combinations of arrow lengths, drum speeds and number of
apertures in the drum can be used.
The signals from the various photocells are transformed into a
reading on the target monitor 38 by the following means. With
reference to FIG. 6, one embodiment of the invention for
transforming the signals comprises a scanning circuit connected to
a source of electrical power and having a constant current
generator 100. The constant current generator 100 is connected to a
first silicon control switch 102, (a silicon control rectifier used
as a switch), which is controlled by the first photocell 90.
Connected in series with the silicon control switch 102 across the
source of electrical power is a diode 104 and a condenser 106.
Connected in parallel with diode 104 and the condenser 106, is a
second silicon control switch 107 which is controlled by the second
photocell 94, and a low impedance relay coil 110. Since silicon
control rectifiers when used as switches begin to conduct only when
stimulated by a positive pulse, and the second photocell 94 is
arranged to be constantly energized except when an arrow is present
as described above, it is necessary that the polarity of the
connection of the second photocell 94 to the silicon control switch
107 be inverted, such that a positive pulse is fed to the silicon
control switch 107 by the second photocell 94 when the latter is
deenergized.
An emitter follower 108 is connected to the junction of the diode
104 and the capacitor 106. The emitter follower 108 serves to read
the voltage across the capacitor 106 at any given time with
insignificant discharging of the capacitor 106. This signal is in
turn fed to a servomechanism in a manner as will be hereinafter
described.
The relay coil 110 operates a pair of single throw switches 111 and
112, and a single-pole double-throw switch 113 having a normally
closed contact 113a and a normally open contact 113b. The switch
111 is placed between the output of the emitter follower 108 and
the servo mechanism. The switch 112 is placed in a series circuit
with a time delay switch 114 and the normally open contact 113b of
switch 113 and a reset relay coil 115 across the source of
electrical power. The time delay switch 114 is arranged such that
when switch 112 is closed and switch 113 is closed across contact
113b electrical current will flow to the reset relay coil 115 after
a predetermined time period has passed. The third photocell 98 is
connected to the contact 113a such that when switch 113 is closed
through contact 113a the third photocell 98, when energized, will
energize the reset relay coil 115. Additionally, the contact
transducer 42 on the deflector 40 is arranged to energize the reset
relay 115 if the deflector is hit by an arrow.
A normally open shorting switch 116 is closed by action of the
reset relay 115 and is arranged across the power source from the
junction of the constant current generator 100 and the first
silicon control switch 102. A second normally open shorting switch
117, also operated by the reset relay 115, is arranged across the
capacitor 106. Since the system must operate rapidly, the relays
preferably are comprised of reed switches or the like.
As mentioned previously, the output of the emitter follower 108 is
fed through the switch 111 when the latter is closed to a
servomechanism. The servomechanism comprises a magnetic modulator
119 of conventional construction which converts the DC input signal
to an alternating current signal. Preferably, on appropriate leads,
a DC bias is placed on the magnetic modulator 119 so as to achieve
a linear response in the servomechanism. The output of the magnetic
modulator 119 is fed to a gain potentiometer 120 and then to a
servoamplifier 121 which may be of conventional construction. The
amplifier 121 is then connected to a conventional servomotor 122.
Associated with the output of the servomotor 122 is a variable
resistor 122a connected across a suitable DC source. The wiper 122b
of the resistor 122a is linked by suitable means 122c to the
servomotor 122 and is moved therewith when the motor 122 responds
to an input signal. Through appropriate leads the resulting signal
from the resistor 122a is fed back to the modulator 119 and is
arranged to balance the input signal when the servomotor 122 has
fully responded thereto to preclude further movement thereof. The
operation of the circuit in conjunction with the target monitor 38
will be described hereinafter.
FIGS. 7, 8 and 9 show the mechanism by which the arrow position is
indicated on the target monitor 38. The target monitor 38 comprises
a translucent facing 130 bearing indicia, corresponding to that on
the target 26, mounted in front of the indicating mechanism. The
indicating mechanism includes a pair of servomotors 122 and 123,
each operated by one system of scanning mechanism 25. The
servomotor 122 mounts an arm 126 which is adapted to rotate across
the translucent facing 130 to the position dictated by its scanning
circuit. The servomotor 123 is mounted adjacent an opposite corner
of the translucent facing 130 and also mounts a similar arm 127.
The arm 127 supports an indicating lamp 136 mounted on a movable
carriage 132. The carriage 132 includes grooved wheels 134 mounted
on tracks 128 on either side of the arm 127. The carriage 132 is
spring-biased by a constant tension spring 140 toward the upper
extremity of the arm 127. Mounted on one side of the carriage 132
and in line with the longitudinal axis of the indicating lamp 136,
is a cam follower 138 arranged in the path of the arm 126. As will
be noted in FIG. 8, the arms 126 and 127 are slightly offset from
parallel lines, 126a and 127a respectively, intersecting the center
of rotation of their respective servomotors. The position of the
indicating lamp 136 and the cam follower 138 on the carriage 132 is
such that the lamp 136 will be located at the intersection of the
parallel line for each arm when the carriage is moved under the
influence of the two arms 126 and 127. This construction assures
that the lamp 136 will always be positioned at the exact angle of
interception of the arrow regardless of its position with respect
to the lengths of the two arms 126 and 127.
The operation of the scanning and indicating mechanism is as
follows: Again, since the respective scanning and indicating
mechanisms for each of the two coordinates of the arrow hit upon
the target 26 are the same, the operation of only one will be
described. Initially, the capacitor 106 has a "zero" charge. As the
beam of light begins its sweep across the flight path, the first
photocell 90 is energized which supplies a short pulse to the first
silicon control switch 102. This causes the silicon control switch
102 ro conduct and to be locked "on." The capacitor 106 is then
charged linearly by the constant current generator 100 through the
diode 104. If during the sweep of the light beam across the flight
path, an arrow is present, the second photocell 94 is momentarily
deenergized and by virtue of its reversed polarity connection to
the second silicon control switch 107, the latter receives a
positive pulse, begins to conduct and is also locked "on."
Accordingly, relay 110 is energized closing switches 111, 112 and
moving the switch 113 to the contact 113b. Because of the low
impedance of relay 110, the constant current generator 100 is
effectively shorted out. This precludes the capacitor 106 from
charging further, while the diode 104 precludes the capacitor 106
from discharging through the second silicon control switch 107.
With the closing of the switch 111, the voltage on the capacitor
106 is applied through the emitter follower 108, to the magnetic
modulator 119 where it is transformed into an alternating current
signal, to the amplifier 121, and thence to the servomotor 122
which responds accordingly, moving its arm across the translucent
facing 138. Thus, when the servomotors 122 and 123 are actuated by
signals from their respective scanning circuits, they respectively
move the arms 126 and 127 to positions across the translucent
facing 130 corresponding to the angles of interception of the
arrow. The camming action of arm 126 on the cam follower 138 of the
carriage 132 forces the indicating lamp 136 to one of the
appropriate coordinates corresponding to the arrow hit on the
target, while the movement of the carriage 132 by arm 127 positions
the indicating lamp 136 at the other coordinate of the arrow hit on
the target. At this point, the lamp 136 indicates through the
translucent facing 130 and the indicia thereon, the position at
which the arrow hit the target 26. This position will be held until
the device is reset by the time delay switch 114.
Simultaneously, with the closing of switch 112 and the moving of
switch 113 to contact 113b, which takes the third photocell 98 out
of the circuit to prevent premature energization of reset relay
115, the time delay switch 114 is energized and after a
predetermined time period will energize reset relay coil 115. Upon
the energization of reset relay coil 115, shorting switches 116 and
117 are closed. The closing of the shorting switch 116 diverts the
current from the two silicon control switches 102 and 107, which
then revert to an "off" status. This action additionally stops the
flow of current through relay 110 causing switches 111 and 112 to
open and switch 113 to move back to the contact 113a, which takes
the servomechanism and the time delay switch, respectively, out of
the circuit. Simultaneously, with the closing of shorting switch
116, shorting switch 117 is closed thereby shorting out the
capacitor 106 and reducing the charge thereon to zero. The system
is now ready for the next arrow.
If no arrow is present in the flight path, the capacitor 106 is
charged as before. In this case, the third photocell 98 will be
momentarily energized by the beam of light ending its sweep across
the flight path, which will energize relay 115 through the normally
closed contact 113a of switch 113, thereby closing shorting
switches 116 and 117. Again, the first silicon control switch 102
is turned "off" and the capacitor 106 has its charge reduced to
zero, thus readying the system for the next arrow. Additionally, if
desired, a manually operated switch 118 can be placed in the
circuit to selectively energize the reset relay 115 to reset the
system. Should an arrow strike the deflector 40, the control
transducer 42 will energize the reset relay 115.
It will be apparent from the foregoing that the capacitor 106 acts
as a timer, measuring the time from the beginning of the sweep of
the beam light across the flight path to the time at which the beam
of light is broken by an arrow in terms of the voltage of its
charge. It will be additionally noted that the presence of the time
delay switch 114 is required to permit the servomechanism to
respond to the charge across the capacitor 106 and to permit an
archer or spectators to visually observe the resulting indication
on the target monitor 38.
It will be apparent that a scanning system according to the
invention, such as that detailed above, provides great advantages
over the sensing systems of the prior art. Because the system does
not rely on mechanical or actual physical contact with the arrow
passing through the target as do prior art devices, there is no
arrow injuring contact and the sending of the position of the arrow
as it passes within the flight path and through the target with
means according to the invention is significantly more accurate.
This is particularly true where the arrow hits the boundaries
between adjacent target areas. Devices of the prior art, in such
situations, either indicate that both target areas have been hit by
an arrow or rely on a complex system of electronic circuitry which
arbitrarily decides that the arrow has hit one area or the other.
By way of contrast, when a scanning system according to the
invention is used, the point at which the arrow hits the target
need only be ascertained visually on the target monitor by the
archer and scored in accordance with the established rules
governing hits on target area boundaries. Thus, when a conventional
method of scoring an archery game is used, the target sensing and
indicating means according to the invention provide a significantly
greater degree of accuracy in scoring than is obtainable with prior
art devices.
Briefly, the overall operation of the range is as follows. The
archer 22 steps to the firing line 20 and fires an arrow 24 at the
target 26. Just prior to the hitting of the target 26 by the arrow
24, the arrow 24 passes through the scanning mechanism 25 causing
the scanning circuitry and servo mechanism to respond in the manner
previously described to indicate the point of entry of the arrow
into the target 26 to the archer 22 or spectators on the target
monitor 38. The arrow 24 hits the target 26, passes partially
through the grids 50, is stopped by the plate 52 of the backstop
28, and comes to rest lying loosely within the grids 50 to be
observed by the archer.
The score of the shot is recorded and the scanning system is then
reset either automatically by the time delay switch 114 or by
manual operation of switch 118. Additional arrows 24 may then be
fired as desired, causing the above sequence to be repeated. At
some point, the backstop 28 will have received its programmed
number of arrows 24 and will automatically eject the arrows 24 onto
the collectors 29. From the collectors 29, the arrows 24 will be
transported without injury thereto by the belts 30a, 30b, 32, 34a,
34b to the firing line 20 and deposited in the quiver 36 to be held
in readiness for the archer 22.
Of course, it will be appreciated that the use of an automated
range according to the invention takes much of the danger and
drudgery out of archery. Additionally, while not being limited
thereto, such a range is particularly well suited for the playing
of an archery game such as that described hereinafter, as well as
for league play because of the timesaving automation thereof and
the various features providing ready adaptability to various target
arrangements and combinations of the number of arrows to be
fired.
To facilitate the rapid changing of target indicia by an archer or
the use of moving target indicia, a suitable optical system (not
shown) in conjunction with the projector 27 or a second projector
39 may be used to project a corresponding image on the target
monitor 38.
* * * * *