U.S. patent number 3,776,556 [Application Number 05/277,471] was granted by the patent office on 1973-12-04 for golf club swing training device.
Invention is credited to Charles S. McLaughlin.
United States Patent |
3,776,556 |
McLaughlin |
December 4, 1973 |
GOLF CLUB SWING TRAINING DEVICE
Abstract
A tear drop shaped body containing a pair of differently
oriented and pitched whistles is attached to the shaft of a golf
stick to indicate slices and hooks when the golf stick is swung.
When the golf stick is properly swung, neither whistle will produce
a sound.
Inventors: |
McLaughlin; Charles S.
(Cambridge, MA) |
Family
ID: |
23061025 |
Appl.
No.: |
05/277,471 |
Filed: |
August 2, 1972 |
Current U.S.
Class: |
473/234; 446/404;
446/216 |
Current CPC
Class: |
A63B
69/3635 (20130101) |
Current International
Class: |
A63B
69/36 (20060101); A63b 069/36 () |
Field of
Search: |
;273/183,186,193,194
;46/175,179 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Marlo; George J.
Claims
What is claimed is:
1. An attachment for the shaft of a golf club, said attachment
comprising a tear shaped body having an outer surface developed
about an axis, said body having upper and lower surfaces and
opposite side surfaces, a first channel extending from one side
surface to the other side surface, a second channel extending from
said other side surface to said one side surface, said channels
being separated from and oblique to one another, a relatively low
pitched whistle in one channel and a relatively high pitched
whistle in the other channel, the entrances of the channels being
so positioned with respect to the forward portion of said body,
that motion of said body along said axis causes no sound of said
whistles but motion of said body along a line oblique with respect
to said axis causes one of the two whistles to sound.
2. The attachment of claim 1 wherein the entrances of said channels
are positioned at the maximum cross-sectional dimensions of said
body.
3. The attachment of claim 1 wherein the exits of said channels are
positioned at the said rearward portion of said body.
4. The attachment of claim 1 wherein said body and said channels
are integrally composed of plastic.
5. The attachment of claim 1 wherein the axis of said body is
perpendicular to the plane of the head of the golf club to which
said body is attached.
Description
BACKGROUND AND SUMMARY
The present invention relates to the game of golf and, more
particularly, to an accessory for attachment to a golf club, by
which hooks and slices may be indicated to a golfer.
To a great many golfers, the unconscious development of a slice or
a hook is a problem of major proportions. Much time and expense has
been spent in trying to find the cure. The causes of slicing and
hooking are well known to the initiated but mere practice in
swinging, even with an expert watching and coaching, usually proves
useless. Reliably judging when a fast moving club is hitting an
imaginary ball correctly is difficult for the human eye. On the
other hand, repeated practice in hitting balls on golf courses or
driving ranges requires an expenditure of time that a player often
is reluctant to make. He usually prefers to try to correct his
problem during actual play, with unsuccessful results. Thus, there
exists a need for a device that can cure slices and hooks for use
anywhere, at any time and without cost. The problem of hooks and
slices is one of club path at contact. It is recognized that unless
a golf club meets the ball absolutely perpendicularly to the
intended line of flight, the ball will either hook off to one side
of the fairway or slice off to the other.
A "slice" is caused by movement of the face of the clubhead in
toward the golfer across the intended direction of the ball. The
result is forward movement of the ball but with a spin that causes
it to curve or fade to the right into the rough. A "hook" is caused
by movement of the face of the clubhead out from the golfer across
the intended direction of the ball. The result is forward movement
of the ball but with a spin that causes it to curve or fade to the
left into the rough. The problem, therefore, is an undesired vector
of inward or outward motion of the clubhead at contact when there
should be only a vector at right angles to the clubhead face.
The present invention is based on a recognition that slicing and
hooking develops from the golfer's swing alone. While swing arises
from stance and grip, the results of any correctional efforts are
manifested in the swing. Thus a testing device capable of
indicating when the swing leaves its proper path inwardly or
outwardly across the face of an imaginary ball can provide a
foolproof method of testing swing. Practice swinging and testing in
an effort to cure slicing and hooking can occur any where and any
time there is room to swing a golf club.
The object of the present invention is the attachment to a golf
club shaft of a tear shaped bulb, having a streamlined shape that
does not affect the feel of a golf club, which presents a pair of
differently oriented and pitched whistles, neither of which sound
when the swing of the golf club is perpendicular to the club face,
one of which sounds when there is a slice and the other of which
sounds when there is a hook.
Other objects of the present invention will in part be obvious and
will in part appear hereinafter.
The invention accordingly comprises the product, together with its
components and features, which are exemplified in the present
disclosure, the scope of which will be indicated in the appended
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
For a fuller understanding of the nature and objects of the present
invention, reference is made to the following detailed description,
taken in connection with the accompanying drawings wherein:
FIG. 1 is a front plan view of a golf club in combination with an
attachment of the present invention;
FIG. 2 is an enlarged side view of the attachment of FIG. 1;
FIG. 3 is a top plan view of the attachment as shown in FIG. 2;
FIGS. 4A, 4B, and 4C are schematic views of the attachment as shown
in FIG. 3, illustrating certain principles of the present
invention; and
FIG. 5 is a cross-sectional view through the attachment halfway
along its axis.
DETAILED DESCRIPTION
Generally, FIG. 1 shows a golf club in the form of a driver 10
having a handle 12, a shaft 14 and a head 16, and an attachment 18,
affixed to shaft 14 by any suitable clamp (FIG. 5). As shown, the
face 20 of club 16 lies in a plane that is developed along X,Y axes
22, 24 and attachment 18 presents a tear shaped surface of
revolution that is developed about Z axis 26. Z axis 26 is
perpendicular to the plane of X,Y axes 22, 24. Preferably
attachment 18 is a lightweight, hollow bulb that is composed of
plastic. Each cross section of bulb 18, with respect to Z axis 26
is shown as being circular although it is to be understood that in
other embodiments each cross section, with respect to Z axis 26, is
an ellipse other than a circle, the major or minor axis of which
extends along X axis 22 or Y axis 24.
As shown in FIG. 2, the upper and lower halves 28, 30 of bulb 18
are divided from each other by a plane 32 which is parallel to X,Y
plane 22, 24 and which includes Z axis 26. A shown in FIG. 4A, the
horizontal cross section of bulb 18 in plane 32 has a profile with
an enlarged curved forward portion 34, rearwardly and inwardly
tapering side portions 36, 38 and a reduced curved rearward portion
40. In upper portion 28, extending diagonally from the right edge
portion to the left edge portion and from a point at and just
behind the maximum cross-sectional dimension of body 18 to a point
adjacent to rearward portion 40, is a channel 42 within which is
disposed a whistle 44. In lower portion 30, extending diagonally
from the left edge portion to the right edge portion and from a
point at and just behind the maximum cross-sectional dimension of
body 18 to a point adjacent to rearward portion 40, is a channel 46
within which is disposed a whistle 48.
In the form shown, tear drop shaped bulb is about four inches long
and 2 inches in maximum diameter. The bulb is hollow except for
channels 42, 46 which extend through the bulb cavity, being
integrally composed of the same plastic as the bulb. The bulb is
attached to the shaft of the club just above the head with the axis
of tear drop parallel to the body of the player. The attachment to
the shaft is by any conventional clamp that permits easy rapid
attachment and removal while securely holding the unit in place
during use. With respect to axis 26, one channel opening is about
"10 o'clock" running thru to the other side at "4 o'clock". Within
the channel at the end is a high pitched whistle to be actuated by
the movement of air through the channel after entering at "10
o'clock". Similarly, the other channel, starts at "2 o'clock" and
ends at "8 o'clock." Within the channel at the end is a low pitched
whistle to be actuated by the movement of air through the channel
after entering at "2 o'clock."
In operation, attachment 18, which is shown in cross section in
FIG. 5, is clamped to shaft 14 by a split ring 52 having a pair of
opposed ring portions 54, 56 and a pair of oppositely extending
extensions 58, 58 and 60, 60. One of the extensions is embedded in
the body. The extensions are connected by nuts and bolts 62, 64. It
will be observed that the axis of clamp 52 coincides with the axis
of shaft 14, which is perpendicular to Z axis 26. The channels
constitute two wind chambers so angled as to trap no air as in FIG.
4A when the club travels straight ahead perpendicularly to the
intended line of flight. But when the club head is being drawn
diagonally across the ball, inwardly as in FIG. 4B or outwardly as
in FIG. 4C, the air rushes through the wind chamber on the
frontally exposed side and the respective whistle instantly
indicates that a hook or slice has resulted. The player then can
make necessary adjustments and immediately try further swings,
repeating the process until he assumes a position at which the
whistles stop sounding. From that position, he can try additional
swings for the silence that tells him he has corrected his
fault.
Since certain changes may be made in the above embodiment without
departing from the scope of the present invention, it is intended
that all matter contained in the above description and shown in the
accompanying drawings be interpreted in an illustrative and not in
a limiting sense.
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