Practice tethered baseball

A practice baseball and softball simulates fly balls to teach youngsters to catch fly balls. The ball has an elongated rope and a throughbore into which is placed a plastic sleeve with one end of the rope being clamped internally in the ball, and the other end of the rope extending outwardly from one end of the sleeve to be grasped by one who twirls the ball at the end of the rope around until it reaches sufficient speed to be released allowing the ball to sail through the air like a fly ball at various trajectories.

BACKGROUND OF THE INVENTION 
The game of baseball is learned early by youngsters in school, "little 
leagues" and general playground activities. Here, the youngsters practice 
catching the ball, swinging the bat, and playing a position on an 
organized team. Of course, there is a need for frequent practice to 
develop the hand/eye coordination needed to catch a ball, hit a pitched 
ball, and throw a ball to a designated spot. In the practice of catching a 
ball, there are "line drives" and "fast throws" where the ball travels as 
close to a straight line as possible, never reaching an elevation of more 
than 6-7 feet above the ground; and there are "fly balls" where the ball 
reaches a high elevation before gravity makes the ball turn and fall to 
earth through a curve that is close to parabolic. In practice these balls 
are usually propelled by one tossing the ball in the air and hitting it as 
it falls to earth with a swinging baseball bat. The batter is sufficiently 
skilled to hit the ball high, like a "fly ball" or low, like a "line 
drive". For practice at home or whenever there is no skilled batter 
available, it is difficult to provide the necessary speed and trajectory 
to provide a good practice session. It is the purpose of this invention to 
provide a practice baseball and softball for use in place of a batter 
and/or for use by a single player in simulating "pop-ups". 
It is an object of this invention to provide a baseball and a softball for 
use in the practice of catching the balls, particularly those hit as a fly 
ball. It is another object of this invention to provide a ball that can be 
thrown to simulate different types of batted balls. Still other objects 
can be found in the more detailed description of the invention which 
follows. 
BRIEF SUMMARY OF THE INVENTION 
This invention relates to a practice baseball or softball comprising a ball 
with a diametric first throughbore into which is a cylindrical clamping 
sleeve fitting snugly into said first throughbore, and having a lengthwise 
central axial second throughbore and two transverse bores located 
generally medially of said sleeve and spaced apart lengthwise of the 
sleeve. The sleeve includes an outwardly extending transverse flange at 
one end thereof, and a screw with a large diameter head screwed into the 
other sleeve end and seated in a counterbore in the first throughbore. A 
length of rope passes into the first throughbore through the one end of 
the sleeve and through the two transverse bores, and is clamped tightly 
between the first throughbore and the sleeve. 
In specific and preferred embodiments of this invention the sleeve is a 
hollow tube of plastic material, the screw is a thread-cutting screw 
capable of cutting into the plastic sleeve and the flange head is 
partially recessed in the ball's outer surface. It is also preferred if 
the holes in the transverse bores are shaped such that one of each pair of 
holes is an oval, and that the two ovals are on opposite sides of the 
sleeve. Also, the end of the screw engages the rope within the sleeve 
after being threaded through the holes to provide a secure attachment of 
all components.

DETAILED DESCRIPTION OF THE INVENTION 
The features of this invention are best understood by reference to the 
attached drawings. 
In FIG. 1 there is depicted a baseball 10 of this invention, which may be a 
hard ball or a softball. Drilled along a diameter of ball 10 is a hole or 
throughbore 11 extending completely through ball 10 and of a size to admit 
the clamping sleeve 12 (shown in detail in FIGS. 2-4). 
A length of rope 24, perhaps 12-18 inches long, is threaded into the 
central axial bore 13 of sleeve 12 and through two transverse bores 14 and 
15. If the respective sizes of throughbore 11, sleeve 12, and rope 24 are 
appropriate rope 24 will be securely clamped to baseball 10. In addition, 
screw 19 has an unthreaded rounded tip pressed against rope 24 in 
transverse bore 15, further assuring the clamping of rope 24 in baseball 
10. Head 23 of screw 19 is seated in a counterbore 29 in one end of 
throughbore 11 to prevent sleeve 12 from being pulled out of throughbore 
11, and the head 23 is made to lie substantially flush with the outer 
surface of baseball 10. 
In FIGS. 2-4 there is shown the details of sleeve 12 wherein the sleeve 12 
is a hollow cylindrical tube with a central throughbore 13, two transverse 
bores 14 and 15, and a transversely extending flange 18 at one end of 
sleeve 12. The other end of throughbore 13 is adapted to admit screw 19. 
Preferably sleeve 12 is plastic and screw 19 is a thread cutting screw. As 
an alternative, hollow 19 may have internal threads at its lower end and 
screw 19 may have standard threads to match those in hollow 13. Two 
features about screw 19 are important to the success of the invention. The 
forward tip 20 of screw 19 is not threaded, but is rounded at its 
circumferential edge, which permits it to press against rope 24 (see FIG. 
1) to squeeze it and not to cut it. The other feature is that head 23 of 
screw 19 is sufficiently large in diameter to extend beyond the outside 
surface of sleeve 12 and to be seated in counterbore 29 (see FIG. 1) and 
be flush with the outside surface of the ball to deter injury to the 
players. 
It is to be understood that reference to counterbore 29 may only be a 
pressured indentation to accommodate the thickness of the screw head 23 
and likewise flange 18 may be partially or fully sunk into a similar 
counterbore 29', to provide an overall finish to the baseball 10. 
Sleeve 12 also includes two transverse bores 14 and 15, which serve as 
guides for threading rope 24 in a manner such that it will be clamped 
inside baseball 10. As may be seen in FIG. 1, rope 24 is threaded from 
hollow 13 of sleeve 12 out one hole of transverse bore 14, back in one 
hole of transverse bore 15, out the other hole of transverse bore 15, and 
back in the second hole of transverse bore 14 to central to hollow 13. 
Because the outside diameter of sleeve 12 and the diameter of throughbore 
11 are relatively close as compared to the diameter of rope 24, there are 
two locations 39 and 40 where rope 24 is jammed tightly between sleeve 12 
and throughbore 11. In the manufacture of this practice ball, rope 24 is, 
of course, threaded into sleeve 12 and through the holes of transverse 
bores 14 and 15 before sleeve 12 threaded with rope 24 is pressed tightly 
into throughbore 11. The respective sizes of sleeve 12, throughbore 11, 
and rope 24 to provide the desired clamping action will depend on the 
compressibility of rope 24, and may require a few trial tests to determine 
the desired combination. 
Transverse bores 14 and 15 result in four holes since each bore 14 and 15 
passes through two walls due to the fact that sleeve 12 has an internal 
central axial hollow 13. Bores 14 and 15 are generally located somewhere 
in the middle of the length of sleeve 12, and are spaced apart lengthwise 
along sleeve 12. The shapes of the holes in bores 14 and 15 are not 
critical, and normally would be expected to be circular or oval. It has 
been found to be preferred to have one hole in each pair making up a 
transverse bore 14 and 15 to be oval and that the two oval holes to be on 
opposite sides of sleeve 12. This is shown in FIGS. 2-3 where oval hole 16 
of bore 14 is on one side of sleeve 12 and oval hole 17 of bore 15 is on 
the opposite side of sleeve 12. The arrangement facilitates the threading 
of rope 24 initially from the internal throughbore 13, out oval hole 16 
into hole 15, out oval hole 17 and into hole 14 to extend into throughbore 
13. 
FIG. 5 illustrates how the baseball of this invention is used. The player 
30 wraps a portion of the free end of rope 32 around the first two fingers 
of his throwing hand and gripping same with thumb and swings the bail 31 
forward about one fourth of an arc forward then back and forward again and 
continues around in a circle 34 in the direction of arrow 33 at arms 
length in a substantially vertical plane. If the centrifugal speed of the 
ball 31 reaches a suitable speed as judged by the player he releases his 
thumb grip on the rope 32, and ball 31, with rope 32 attached, speeds 
through the air for the practicing player (not shown) to catch. A release 
of ball 31 along line 35 produces a high "fly ball" 37 of player 30, or if 
he releases the .ball 31 a little earlier along line 36 a "line drive" is 
produced. Various types of simulations of batted balls can be produced by 
a skilled player 30, changing the centrifugal speed and the release point 
for the ball 31. Also, a "pop fly" can be obtained whereby the thrower 
player 30 can attempt to catch his own "pop fly". 
While the invention has been described with respect to certain specific 
embodiments, it will be appreciated that many modifications and changes 
may be made by those skilled in the art without departing from the spirit 
of the invention. It is intended, therefore, by the appended claims to 
cover all such modifications and changes as fall within the true spirit 
and scope of the invention.