SWINGING TARGET DEVICE

Abstract

A swinging target device has a stand, an arm having a first end and a second end and pivoted to the stand between the first and second ends for pivoting movement about a primary pivot axis. A first target assembly is pivoted to the first end of the arm for pivoting movement about a first secondary pivot axis, and a second target assembly is pivoted to the second end of the arm for pivoting movement about a second secondary pivot axis.

Claims

1. A swinging target device, comprising: a stand, an arm having a first end and a second end, the arm pivoted to the stand between the first and second ends of the arm for pivoting movement about a primary pivot axis, the arm having a first arm portion extending from the primary pivot axis to the first end of the arm and having a second arm portion extending from the primary pivot axis to the second end of the arm, a first target assembly pivoted to the first end of the arm for pivoting movement about a first secondary pivot axis, and a second target assembly pivoted to the second end of the arm for pivoting movement about a second secondary pivot axis.

2. The target device of claim 1, wherein at least one of the first and second target assemblies has a variable mass that changes when at least a portion of the one of the first and second target assemblies is struck by a projectile.

3. The target device of claim 2, wherein when the mass of the one of the target assemblies changes, a center of gravity of the one of the target assemblies also changes.

4. The target device of claim 1, wherein one of the first and second target assemblies is configured to oscillate +/?90 degrees from vertical and the other of the first and second target assemblies is configured to rotate through 360 degrees.

5. The target device of claim 1, wherein: the first target assembly comprises a target frame extending upwardly from the first secondary pivot axis, a target panel mounted to the target frame, and a counterweight attached to the target frame and extending downwardly from the first secondary pivot axis, and the second target assembly comprises an arm assembly having at least three arms projecting radially outwardly from the second secondary pivot axis, and a target plate removably attached to a free end of each of the arms, the target plates configured to detach from respective arms when struck by a projectile.

6. The target device of claim 1, wherein the first and second arm portions form an angle of 0 degrees to 180 degrees relative to one another.

7. The target device of claim 1, wherein the first arm portion has a first length and the second arm portion has a second length, and wherein the first and second lengths are the same.

8. The target device of claim 1, wherein the first arm portion has a first length and the second arm portion has a second length, and wherein the first and second lengths are different.

9. The target device of claim 1, wherein a combined center of gravity of the arm and the first and second target assemblies is coaxial with the primary pivot axis.

10. The target device of claim 1, wherein a combined center of gravity of the arm and the first and second target assemblies is not coaxial with the primary pivot axis.

11. A swinging target device, comprising: a stand, an arm having a first end and a second end, the arm pivoted to the stand between the first and second ends of the arm for pivoting movement about a primary pivot axis, a first target assembly pivoted to the first end of the arm for pivoting movement about a first secondary pivot axis, and a second target assembly pivoted to the second end of the arm for pivoting movement about a second secondary pivot axis, the first target assembly comprising a target frame extending upwardly from the first secondary pivot axis, a target panel mounted to the target frame, and a counterweight attached to the target frame and extending downwardly from the first secondary pivot axis, the first target assembly configured to oscillate +/?90 degrees from vertical, the second target assembly comprising an arm assembly having at least three arms projecting radially outwardly from the second secondary pivot axis, and a target plate removably attached to a free end of each of the arms, the target plates configured to detach from respective arms when struck by a projectile, the second target assembly configured to rotate through 360 degrees.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

[0017] Like reference numerals are used to indicate like parts throughout the various drawing figures, wherein:

[0018] FIG. 1 is a pictorial view of a swinging target device according to one embodiment of the present invention;

[0019] FIG. 2 is a rear pictorial view thereof;

[0020] FIG. 3 is a front view schematic representation thereof illustrating the radii of certain members relative to their axes of rotation;

[0021] FIG. 4 is a similar schematic representation illustrating the rotational directions of those members relative to their axes of rotation;

[0022] FIG. 5 is a similar schematic representation showing example rotated positions of certain target elements;

[0023] FIG. 6 is a similar schematic representation illustrating the location of a first center of mass;

[0024] FIG. 7 is a schematic representation illustrating the location of a changed center of mass (relative to that illustrated in FIG. 6); and

[0025] FIG. 8 is a pictorial view of the device showing two targets plates that have been shot away, resulting in a changed center of mass.

DETAILED DESCRIPTION

[0026] With reference to the drawing figures, this section describes particular embodiments and their detailed construction and operation. Throughout the specification, reference to one embodiment, an embodiment, or some embodiments means that a particular described feature, structure, or characteristic may be included in at least one embodiment. Thus, appearances of the phrases in one embodiment, in an embodiment, or in some embodiments in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the described features, structures, and characteristics may be combined in any suitable manner in one or more embodiments. In view of the disclosure herein, those skilled in the art will recognize that the various embodiments can be practiced without one or more of the specific details or with other methods, components, materials, or the like. In some instances, well-known structures, materials, or operations are not shown or not described in detail to avoid obscuring aspects of the embodiments. Forward will indicate the direction toward the shooter and the direction from which projectiles are fired, while rearward will indicate the opposite direction. Lateral or transverse indicates a side-to-side direction generally perpendicular to the axis of the support base or target. Top or up will be the upward direction relative to the ground and opposite the force of gravity while bottom or down will be the downward direction relative to the ground and in the direction of the force of gravity. As used herein, substantially means about or approximately, allowing for minor variation that does not detract from the construction or operation of the invention.

[0027] Referring first to FIGS. 1, 2, and 3, therein are shown pictorial views (FIGS. 1 and 2) and a front schematic illustration (FIG. 3) of a swinging target device 10 according to one embodiment of the present invention. The device 10 includes a stand 12 that supports a first pivot mechanism 14 that provides a primary, fixed pivot axis A at a position elevated vertically above the ground 16. Radially spaced from the first pivot 14 on radial arms 18, 20 are secondary pivot mechanisms 22, 24 that provide first and second secondary pivot axes B, C that rotate relative to the primary pivot axis A. Arms 18, 20 are fixed relative to one another; consequently, both arms 18, 20 pivot about pivot axis A as a solid body. All of the pivot mechanisms 14, 22, 24 described herein can be any suitable known device or assembly, for example one using a permanently lubricated, self-lubricating, or sealed bearing.

[0028] A first target assembly 26 is mounted to the first arm 18 to pivot at the first secondary pivot axis B. A second target assembly 28 is mounted to the second arm 20 to pivot at the second secondary pivot axis C. The first and second target assemblies 26, 28 can be substantially the same or, as illustrated, different. Whether substantially the same or different, the masses of the first and second target assemblies 26, 28 with each arm 18, 20 can be substantially the same, so that they are substantially balanced, or can be different. The first target assembly 26 may 26 may include, for example, a counterweighted inverted pendulum assembly having a target panel 30 (such as a shape of perforable cardboard or similar material held in a frame 32) counterbalanced by a weight 34 that hangs below the pivot mechanism 22 and has at least a slightly greater mass than the panel 30 and frame 32 to keep the target panel 30 generally above the pivot axis B while allowing it to swing through a significant arc, as illustrated. The greater the radius r.sub.1 of the panel 30 relative to the pivot axis B, the greater the movement of the target panel 30.

[0029] The second target assembly 28 may include, for example, a star of displaceable target plates 36 replaceably mounted on secondary arms 38 to rotate or swing about the second secondary pivot mechanism 24, as illustrated. The radii r.sub.2 of the secondary arms 38 can be the same, as illustrated, or different.

[0030] The main radial arms 18, 20 may extend radially from the first pivot mechanism 14 and primary pivot axis A at any angle relative to each other between zero and 180 degrees. That is, both the first and second secondary pivot axes B, C can be on the same radius or radial arm extending from the primary pivot axis A, they may be opposite each other, they can be placed at some in-between angle relative to each other, or, if more than two arms and secondary pivot axes are used, they can be evenly or unevenly angularly spaced around the primary pivot axis A.

[0031] Likewise, the radius/length R.sub.1, R.sub.2 of each arm 18, 20 (i.e., the radial distance between the primary pivot axis A and first and second secondary pivot axes B, C) can be the same or different.

[0032] FIG. 3 schematically illustrates the relationship between the three pivot axes A, B, and C. The primary pivot axis A is supported at a fixed position above the ground by the stand 12. The pair of arms 18, 20, that are at a fixed angular relationship to each other, extend radially from the primary pivot axis A and rotate together. Thus, the first and second secondary pivot axes B, C move together in unison around the primary pivot axis A. Target assemblies 26, 28 are mounted to rotate on the first and second secondary pivot axes B, C. In the illustrated example, the first target assembly 26 is in the form of a counterweighted panel that can be, for example, a replaceable paper or cardboard sheet 30 supported in a frame 32 above the first secondary pivot axis B. The counterweight 34 should be slightly heaver than the target panel 30 and frame 32 so that it stays generally upright, but will swing freely about the first secondary pivot axis B, while also further being moved up and down vertically and side to side horizontally by the changing position of the first secondary pivot axis B. The longer the radius of each swinging/rotating target assembly relative to the primary pivot axis A, the greater the movement of the various targets. This, however, has a practical limit in terms of size, weight, and cost.

[0033] FIG. 4 schematically illustrates the rotational movement of the various components relative to primary pivot axis A and secondary pivot axes B and C.

[0034] FIG. 5 illustrates an example location and movement of the various components of the device 10 (relative to that illustrated in FIG. 3) when set into motion and propelled by the force of gravity. The first target panel 30 moves both up and down and side to side as it swings about the first secondary pivot axis B. The target plates rotate, changing both vertical and horizontal position as they rotate about the second secondary axis C. However, the direction, speed, and distance of this movement is compounded because both moving, secondary pivot axes B and C are swinging in an arc relative to the fixed, primary pivot axis A.

[0035] A primary center of mass of the arms 18, 20 and first and second target assemblies 26, 28 (at least initially) mounted to the primary pivot mechanism 14 can be coaxial with the primary pivot axis A or may eccentric, the former creating a wheel effect and the latter creating a pendular effect. That is, they can be balanced or can be unbalanced (or made to be imbalanced during use) so that the arms 18, 20 swing together like a pendulum. This primary center of mass can be changed while the target device 10 is being used, such as by shooting off one or more of the detachable target plates 36.

[0036] FIG. 6 illustrates the center of mass of the example second target assembly 28 with three target plates 36 of substantially similar mass mounted to rotate about the second secondary pivot axis C on secondary arms 38 of substantially similar length. In this condition, the assembly 28 rotates as a substantially balanced wheel with its center of mass substantially coaxial with the second secondary pivot axis C.

[0037] FIG. 7 illustrates the change in center of mass when one of the target plates 36 is shot off and thus removed. The center of mass of the secondary target assembly 28 becomes eccentric to the second secondary pivot axis C and causes the modified assembly to swing (as illustrated by arrow) as a pendulum relative to the second secondary pivot axis C. The momentum of this pendulum applies force varying in both speed and direction to the radial arm 20, which itself is part of a pendulum swinging about the fixed primary pivot axis A.

[0038] FIG. 8 shows pictorially the second target assembly 28 with one remaining target plate 36 acting as a single pendulum. When the last remaining target plate 36 is shot off (not shown), the second arm 20 will no longer have an eccentric center of mass and will be affected in substantially the same way as when all the target plates are in place, except with less mass.

[0039] The dynamic energy (movement) of eccentric masses radially spaced about a pivot axis includes not only speed and direction, but has momentum, which compounds the effects of the multiple pendular movements and makes the speed, placement, direction, and movement of the various targets seem even more erratic and unpredictable. While an engineer or physicist could calculate and predict the target movements in any particular condition, the conditions change when the centers of mass change (target plates are shot off) and further depend on exactly when the masses change (i.e., the location, direction, and velocity of each swinging mass at the moment when the change takes effect). This makes predicting the location (as well and speed and direction) of each target at any given moment particularly challenging.

[0040] While one or more embodiments of the present invention have been described in detail, it should be apparent that modifications and variations thereto are possible, all of which fall within the true spirit and scope of the invention. Therefore, the foregoing is intended only to be illustrative of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not intended to limit the invention to the exact construction and operation shown and described. Accordingly, all suitable modifications and equivalents may be included and considered to fall within the scope of the invention, defined by the following claim or claims.