U.S. patent number 3,893,669 [Application Number 05/347,323] was granted by the patent office on 1975-07-08 for tethered ball tennis instruction device.
Invention is credited to Gilford Myers.
United States Patent |
3,893,669 |
Myers |
July 8, 1975 |
Tethered ball tennis instruction device
Abstract
A standard having an outstanding arm and a flexible suspension
element along the arm and depending from the projecting end of the
latter for releasably holding a ball in position to be hit by a
racket. The end of the suspension element remote from the end
attached to the ball is provided with a loop. A retaining finger is
attached to the standard for releasably retaining the loop of the
suspension member whereby when the ball is hit the retaining finger
will yield to release the loop for allowing the ball retaining end
of the suspension element to be lowered.
Inventors: |
Myers; Gilford (Jenkintown,
PA) |
Family
ID: |
23363237 |
Appl.
No.: |
05/347,323 |
Filed: |
April 2, 1973 |
Current U.S.
Class: |
473/418;
273/DIG.30 |
Current CPC
Class: |
A63B
69/0079 (20130101); Y10S 273/30 (20130101) |
Current International
Class: |
A63B
69/00 (20060101); A63b 069/38 () |
Field of
Search: |
;273/26E,26R,29A,29R,95A,97R,58C,16.5A ;46/51,52 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
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333,591 |
|
Aug 1930 |
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GB |
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489,842 |
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Aug 1938 |
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GB |
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Primary Examiner: Oechsle; Anton O.
Assistant Examiner: Brown; T.
Attorney, Agent or Firm: Youtie; Robert K.
Claims
What is claimed is:
1. A tennis instruction device comprising a standard, an arm
projecting laterally from said standard, a filamentary suspension
member extending along said arm having one end depending freely
from the projecting end of said arm and having its other end
depending along said standard, a fabric having split pile loops on
said one suspension member end for releasable holding engagement
with a standard tennis ball, and an elongated suspension member
retaining finger attached at one end to said standard and having
its free end movable for retaining cooperation with said other
suspension member end and selectively releasing the latter to drop
said one suspension member end for ball replacement thereon.
2. A tennis instruction device according to claim 1, in combination
with adjustable mounting means for adjustably positioning said arm
vertically and horizontally relative to said standard.
3. A tennis instruction device according to claim 1, said arm
comprising a tubular member slidably receiving said supsension
member.
4. A tennis instruction device comprising a standard, an arm
projecting laterally from said standard, a filamentary suspension
member extending along said arm having one end depending freely
from the projecting end of said arm and having its other end
depending along said standard, a fabric having split pile loops on
said one supension member end for releasable holding engagement
with a standard tennis ball, and suspension member retaining means
on said standard for retaining cooperation with said other
suspension member end, said suspension member being longitudinally
freely movable along said arm and gravitationally urged toward said
one suspension member end in the direction against the retaining
action of said retaining means, said retaining means comprising
forcibly releasable interfitting components mounted on said stand
and suspension member remote from said one end of the latter to
suspend a ball in hitting position and release said retaining means
for gravitational movement of said one suspension member end upon
racket impact with the ball.
5. A tennis instruction device according to claim 4, said
components comprising a pin projecting from said standard, and an
eye on said suspension member circumposed about said pin for
resilient deflection of one of said pin and eye upon hitting of the
ball and separation of said components.
6. A game instruction device comprising a standard, an arm
projecting laterally from said standard, a filmentary suspension
member extending along said arm having one end depending freely
from the projecting end of said arm and having its other end
depending along said standard, releasable ball-holding means on
said one suspension member end for releasing a ball upon racket
impact with said ball, said suspension member being longitudinally
freely movable and gravitationally urged toward said one suspension
member end, and releasable suspension member retaining means for
retaining said suspension member against gravity, said retaining
means comprising forcibly releasable interfitting components
mounted on said stand and suspension member remote from said one
end of the latter to suspend said ball in hitting position and
release said retaining means for gravitational movement of said one
suspension member end upon racket impact with said ball.
7. A device according to claim 6, said forcibly releasable
interfitting components comprising a pin projecting from said
standard, and an eye on said suspension member circumposed about
said pin for resilient deflection of one of said pin and eye upon
hitting of the ball and separation of said components.
Description
BACKGROUND OF THE INVENTION
While there have, in the past, been provided devices for
instruction and practice of tennis, including practice of the serve
and other aspects of tennis, the prior devices have not found
general acceptance for many reasons. For example, such prior
devices have been relatively complex in construction, so as to be
costly to manufacture and difficult to operate, say requiring
complex adjustment for the practice of a desired shot. Also, in
prior devices the ball was usually tethered, and if free presented
substantial problems in proper support and release accurately
simulating actual tennis play.
SUMMARY OF THE INVENTION
Accordingly, it is an important object of the present invention to
provide a tennis instruction device which overcomes the
above-mentioned difficulties, is extremely simple in construction
and operation, so as to be economical to manufacture and sell,
capable of quick and easy adjustment as desired, and wherein the
ball being hit is not tethered, but is free and uniquely releasably
retained in a collected position to achieve a highly accurate
simulation of acutal play of the game.
It is another object of the present invention to provide a tennis
instruction device of the type described, which has the
advantageous characteristics mentioned in the preceding paragraph,
and which is readily adapted for manufacture by mass production
techniques for achieving considerable savings in cost, and which is
staunch, durable and reliable throughout a long useful life.
Other objects of the present invention will become apparent upon
reading the following specification and referring to the
accompanying drawings, which form a material part of this
disclosure.
The invention accordingly consists in the features of construction,
combinations of elements, and arrangements of parts, which will be
exemplified in the construction hereinafter described, and of which
the scope will be indicated by the appended claims.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is an elevational view showing a tennis instruction device
constructed in accordance with the teachings of the present
invention.
FIG. 2 is a top plan view of the device of FIG. 1.
FIG. 3 is a partial elevational view similar to FIG. 1, but
illustrating the manner of release of the suspension element upon
racket impact with the ball.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now more particularly to the drawings, and specifically
to FIGS. 1 and 2 therefore, an upright support or standard is
generally designated 10, and may include a lower part, base or
stand 11, and an upright pole or post 12 upstanding from the stand
or base.
Carried by the post or pole 12 may be an elongate tubular member or
arm 15. A suspension member 16, say including an elongate flexible
element or filament 17, say of rope or the like extends along, and
advantageously through the tubular member or arm 15, passing
outwardly through opposite ends of the latter. The filamentary
suspension member 16 has one end region 20 exteriorly of the outer
or distal end of arm 15 provided with a releasable ball holder
21.
The other end region 22 of the suspension member 16 extends out of
the inner or proximate end of tubular arm 15, and releasable
retaining means, generally designated 25 is provided on the
suspension member end region 22 and standard 10 for releasably
retaining the suspension member in position.
More specifically, the lower support region or base 11 may include
a plurality of downwardly divergent legs 26 having their lower ends
engageable with a suitable supporting surface or ground 27. The
upper ends of the legs 26, being relatively close to each other are
connected together by a central connection piece or hub 28 to which
the legs may be removably or fixedly secured, as desired.
Intermediate the upper and lower ends of the several legs 26, and
extending between the legs, is a generally horizontally disposed
support member or platform 30, which may serve advantageously to
support a bucket of tennis balls, as shown in phantom in FIG. 1 at
31.
Centrally of the hub 28, there is provided a generally vertically
disposed, elongate tubular sleeve or nipple 32, having its opposite
ends open and preferably provided with a finger actuable set screw
33 or other suitable releasable and adjustable holding means.
That is, the upstanding pole or post 12 has its lower end region
depending into the sleeve 32 for selected vertical positioning of
the post. The set screw 33 may be engaged to maintain the desired
vertical position of the post.
Circumposed about the post 12, vertically spaced above the sleeve
32, is an annular ring or sleeve 35, also provided with a finger
actuable holding means, say a thumb screw 36. The ring or sleeve 35
is thus vertically slidable along the post 12 and selectively
positionable therealong by tightening of the screw 36 into setting
engagement with the post.
Carried by the ring 35, integral therewith or otherwise suitably
fixed thereto, may be a sleeve 37 which has its axis generally
horizontal and slidably receives the arm 15. A finger actuable set
screw 38 may be threadedly engaged through sleeve 37 for selective
holding engagement with the tubular arm 15, to thereby retain the
latter at a selected position of its horizontal movement. Further,
the tubular arm 15 may be provided on its inner and outer ends with
flared regions or flanges 39 and 40, respectively, defining
retaining engagements constraining the arm to remain captive within
the sleeve 37.
Thus, it will now be apparent that the arm 15 is universally
adjustable, being adjustable vertically with the post 12, and
relative to the post, as well as being adjustable horizontally by
movement relative to its supporting sleeve 37.
The suspension member 16 may be provided on its ballholding end
region 20, spaced from the ball holdler 21, with an enlargement or
stop member 45, as for limiting engagement with the flared arm end
40. The stop member 45 may be a ball having a diameter appreciably
larger than that of the arm 15 and its flared end 40, suitably
secured to the support member.
At the terminal end region of the supporm member 16 is located the
releasable ball holder 21. Advantageously this releasable ball
holder may be defined by a piece or patch of fabric 46 of the type
sold under the trademark "Velcro," which is a pile fabric having
the pile loops split or cut for detachable secure fastening to a
mating fabric. The releasable ball-holding means 21 will retain a
tennis ball 47 in a desired position of elevation against normal
abuse, including inadvertent bumping, or the like, by engagement of
the velcro against the ball.
The flexible element or line region 22 depending from the inner or
proximate end 39 of arm 15 may have its lower end provided with an
enlargement or stop member 50, such as a ball, say similar to the
ball or enlargement 45. Additionally, the base or stand 11, say one
leg 26 may have attached thereto a guide member or tube 51 which
slidably receives the suspension member region 22, to slidably pass
the latter, while retaining the abutment 50 against passage. Thus,
it will be apparent that extension of the suspension member region
20 from the distal end 40 of arm 15 is limited by engagement of the
inner end abutment 50 with tubular guide 51, which extension is
achieved by weight distribution of the suspension system 16, say by
the selected weights of stop members 45 and 50.
The suspension member retaining means 25 may be seen in detail in
FIG. 3, as including a mounting member or sleeve 59 suitably fixed
to the base 11, as by firm circumposition about on leg 26. The
mount may be provided with an outstanding stud or lug 52, and a
retainer element or finger 53 carried by the lug 52 and projecting
outward therefrom. The retainer finger 53 may be resiliently,
yieldably disposed in the outstanding position shown in solid lines
in FIGS. 1 and 3, and be resiliently, yieldably swingable to the
dotted line position shown in FIG. 3. The retainer element or
finger 53 may be resiliently yieldable by suitable spring means,
say being rotatable about a pivot 54 and resiliently urged
clockwise, or of other suitable construction, say the finger being
fabricated of rubber-like material of suitable stiffness.
The retainer means 25 further includes a flexible element or
extension 55, say of suitable rope or line joined, as at 56 to the
region 22 of suspension member 16, and extending therefrom to a
free end provided with an eye or loop 57. The eye or loop 57 is
engageable over the yieldable finger or pin 53, as shown in FIG. 1
to retain the distal end of the suspension member 16 and ball 47 in
properly elevated and suspended relation. Upon impact with the ball
47 to separate or dislodge the ball from its holder 46, the
retainer finger 53 may swing or flex to its phantom position, see
FIG. 3, releasing the eye or loop 57 from the finger and permitting
gravitational falling of the enlargement 45, together with its
suspension member region 20 and ball holder 46 to a lowermost
position limited by engagement of the enlargement 50 with the guide
51. In this lowered position of the holder 46, the ball 47 may be
replaced and then elevated by replacement of the eye 57 over the
outstanding finger 53, all ready for the next cycle of use.
From the foregoing it is seen that the present invention provides a
tennis instruction apparatus which is uniquely simple in
construction and operation, for manufacture and sale at a
reasonable price, serving to facilitate the instruction and
practice of tennis play, and which otherwise fully accomplishes its
intended objects.
Although the present invention has been described in some detail by
way of illustration and example for purposes of clarity of
understanding, it is understood that certain changes and
modifications may be made within the spirit of the invention.
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