U.S. patent number 3,729,194 [Application Number 05/149,428] was granted by the patent office on 1973-04-24 for baseball practice device.
Invention is credited to Thomas G. Barnett.
United States Patent |
3,729,194 |
Barnett |
April 24, 1973 |
BASEBALL PRACTICE DEVICE
Abstract
An elongated resilient element extends vertically between and is
connected with an upper and lower support. A ball having a
diametric bore surrounds the resilient element intermediate its
ends. A lock means, within the bore of the ball, grips the
resilient element and prevents relative movement between the
resilient element and ball.
Inventors: |
Barnett; Thomas G. (Stigler,
OK) |
Family
ID: |
22530230 |
Appl.
No.: |
05/149,428 |
Filed: |
June 3, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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864852 |
Oct 6, 1969 |
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Current U.S.
Class: |
473/426;
403/291 |
Current CPC
Class: |
A63B
69/0084 (20130101); A63B 43/007 (20130101); Y10T
403/54 (20150115) |
Current International
Class: |
A63B
43/00 (20060101); A63B 69/00 (20060101); A63b
069/40 () |
Field of
Search: |
;273/26E,26R,95A,58C,29R,29A,73D,184B,185C,185D,67R,67C,77,97R
;46/49,51,61,77 ;24/126R,114.5,115 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Brown; Theatrice
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATION
This invention is a continuation-in-part of an application filed by
me in the United States Patent Office on Oct. 6, 1969, Ser. No.
864,852 for Baseball Practice Device.
Claims
I claim:
1. A baseball practice device, comprising: upper and lower
vertically spaced supports;
an elongated resilient element extending between and connected with
said supports;
a ball having a diametric bore surrounding said resilient element
intermediate its ends; and,
lock means comprising an elongated member having a series of
oppositely disposed outstanding projections formed thereon closely
received by the bore of said ball and impinging a portion of said
resilient element against the wall forming the bore in said ball
for preventing relative movement between said ball and said
resilient element,
said series of projections forming a pair of longitudinally aligned
rows of teeth disposed respectively at the respective end portions
of said elongated member and engaging said resilient element and a
third row of teeth intermediate the ends of said elongated member
longitudinally engaging a portion of the wall forming the bore of
said ball.
2. A practice device according to claim 1 and further
including:
an elongated resilient sheath formed of synthetic material
surrounding said resilient element.
Description
BACKGROUND OF THE INVENTION
1. Field of the invention.
The present invention relates to a ball game device wherein a
captive ball, after being struck in batting practice, is returned
to its position of repose.
One of the important requirements in achieving proficiency in
batting a pitched ball is training the batter's eye to follow the
ball and coordinate the batter's muscular action for bringing the
bat into contact with the ball. To be able to bat a thrown ball
well requires development of the batter's wrist action and a
strengthing of the arm muscles. I have found that proficiency in
batting balls may be more easily gained by persons of all ages
wherein the ball being batted is anchored or held captive by a
resilient element so that the batter may individually practice
batting balls and need not spend time retrieving the ball.
2. Description of the prior art.
The most pertinent prior patent is U.S. Pat. No. 1,554,409 which
discloses a ball slidably supported diametrically by a vertically
disposed run of cable entrained, at its respective end portions,
over pullies and secured to horizontal spring members mounted on a
support frame.
The principal distinction between this invention and this patent is
the use of an elongated resilient element which diametrically
extends through and supports the ball between vertically spaced
supports wherein a lock means secures the ball to the resilient
element at a selected position thus preventing movement of the ball
relative to the resilient element in response to an upwardly or
downwardly directed force imparted to the ball when struck by the
bat.
This invention is distinctive over the above referred to
application by substituting the resilient element for the spring
members and by the lock means securing the ball to the resilient
element.
SUMMARY OF THE INVENTION
An elongated resilient cord-like element extends, under slight
tension, vertically between and is secured at its respective ends
to upper and lower supports. A diametrically bored ball surrounds
the resilient element intermediate its ends and is adjustably
secured to the resilient element by a lock means within the bore of
the ball impinging the cord against the wall forming the bore of
the ball.
When the ball is struck in a lateral direction by a bat the
resilient element yields in accordance with the force applied by
the bat. A sheath surrounds the resilient element and normally
prevents stretching the resilient element beyond its yield
point.
The principal object of this invention is to provide a baseball
batting practice device which holds a baseball captive and returns
it toward a position of repose following each time the ball is
struck by a bat.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary side elevational view of the device
illustrating, by dotted lines, the action of the ball on its
supporting element when struck by a bat;
FIG. 2 is a fragmentary vertical cross-sectional view, to a larger
scale, taken substantially along the line 2--2 of FIG. 1;
FIG. 3 is a horizontal cross-sectional view taken substantially
along the line 3--3 of FIG. 2;
FIG. 4 is an elevational view, to a further enlarged scale, of the
locking means per se; and,
FIG. 5 is a transverse cross-sectional view, to a further enlarged
scale, of the resilient element.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Like characters of reference designate like parts in those figures
of the drawings in which they occur.
In the drawings:
The reference numerals 10 and 11, respectively, indicate vertically
spaced upper and lower supports between which the device, indicated
generally at 12, is suspended. The lower support 11 may be a floor
or any horizontal surface on which the user, not shown, stands. The
upper support 10 may be the ceiling or any portion of a building
structure disposed a substantial distance above the user's head so
that the spacing between the upper and lower supports provides
ample space about the vertical axis of the device 12 for freedom of
movement of the user when swinging a bat.
The device 12 comprises an elongated cord-like resilient element
14, such as latex rubber 16, or the like, preferably surrounded by
a resilient sheath comprising a synthetic thread woven covering,
such as is presently marketed under the trade mark Nylon, indicated
at 18 (FIG. 5). I have found that a satisfactory size of the
element 14 is 3/8 inch diameter by approximately 12 feet along. The
respective ends of the element 14 may be connected in any suitable
manner to the upper and lower supports 10 and 11, such as by tying
them to eye-screws 20.
A ball, preferably a conventional baseball 22, is diametrically
bored, as at 24, with the diameter of the bore 24 substantially
equal to the diameter of the element 14 in its position of repose.
The bore 24 of the ball surrounds the element 14 at a selected
position intermediate its ends. As is well understood when the
resilient element 14 is elongated, as by stretching, its diameter
is proportionally reduced which would tend to permit the ball 22 to
move along the cord when the ball is hit by a bat, not shown, in a
lateral and slightly upward or downward direction, therefore, to
maintain the ball at a selected position intermediate the length of
the element 14 a lock means 26 is positioned within the bore
24.
The locking means 26 comprises an elongated length of rigid
material 28, rectangular strap-like in general appearance, having a
length less than the diameter of the ball and a width substantially
equal to the diameter of the bore 24 and a thickness on the order
of one-third its width. A series of transverse projections are
formed on one flat surface of the strap-like member 28 adjacent its
respective end portions forming longitudinally aligned spaced-apart
rows of teeth 30 and 32. The length of each row 30 and 32 is
substantially equal to one-third the length of the member 28. The
opposite surface or face of the strap-like member 28 is provided
with a similar row of projections medially its ends extending
approximately one-third its length and disposed opposite the
spacing between the end portion teeth rows 30 and 32.
The locking means 26 is inserted in the bore 24 by manually
stretching the element 14, placing the rows of teeth 30 and 32 in
longitudinal contact with a portion of the element 14 at one end of
the bore and forcing the lock means 26 into the bore to the
position shown by FIG. 2. In this position the row of teeth 34
frictionally engage and extend into the resilient, normally cork,
material forming the ball 22 while the other rows of teeth 30 and
32 engage the resilient element 14 which is deformed, by its
contractile tendency, to fill the spacing between a portion of the
bore wall and adjacent surface of the strap member 28, as shown by
FIG. 3. The rows of teeth 30, 32 and 34 thus, tightly engaged with
the material of the ball and the element 14, impinges the element
14 against the wall forming the bore 24 and prevents relative
movement between the ball and the element 14.
Obviously the lock means may be formed of other cross sectional
configuration, if desired.
OPERATION
In operation the ball 22, secured to the element 14 by the locking
means 26, as disclosed hereinabove, is supported by the upper and
lower supports 10 and 11. The tension on the element 14 is
preferably kept to a minimum to allow maximum lateral movement of
the ball when struck. The batter may then strike the ball with the
bat, not shown, which moves the ball in a lateral direction, as
indicated by the dotted lines in FIG. 1, wherein the resiliency of
the element 14 tends to return it to its solid line position. After
assembling the ball and locking device 26 on the element 14, the
ball may be moved to a different position, intermediate the ends of
the element, by manually stretching the element 14 in a
longitudinal direction to reduce its diameter so that it may be
manually forced in a sliding action through the bore 24 and
longitudinally across the rows of teeth 30 and 32. When the tension
on the element 14 is released, after moving the ball along the
element 14, its resiliency returns it to the configuration of FIG.
2.
Obviously the invention is susceptible to changes or alterations
without defeating its practicability, therefore, I do not wish to
be confined to the preferred embodiment shown in the drawings and
described herein.
* * * * *