U.S. patent application number 13/815842 was filed with the patent office on 2014-09-18 for spiral passing system and method for training football passers to make perfect spiral passes.
The applicant listed for this patent is Shahryar Jamshidi. Invention is credited to Shahryar Jamshidi.
Application Number | 20140274482 13/815842 |
Document ID | / |
Family ID | 51529644 |
Filed Date | 2014-09-18 |
United States Patent
Application |
20140274482 |
Kind Code |
A1 |
Jamshidi; Shahryar |
September 18, 2014 |
Spiral passing system and method for training football passers to
make perfect spiral passes
Abstract
The spiral passing system includes a shoulder harness, a wrist
harness, and a control strap connecting the shoulder and wrist
harnesses. The control strap, adjustable in length, falls from atop
the shoulder harness, down the passer's back, around the passer's
forearm, and to the harness on the passer's wrist. The control
strap's length is adjusted so that, when the passer throws a
football, the strap pulls on the wrist harness, causing the
throwing hand to pronate inward, releasing the football with
longitudinal spin, as a perfect spiral pass. The spiral passing
method has the passer wear and properly adjust the system,
particularly the length of the control strap, so that the passer's
wrist is pronated inward, and the passer can regularly throw
perfect spiral passes. Using the spiral passing system and method
will soon train the passer to produce the same perfect spiral
passes without needing to use the system.
Inventors: |
Jamshidi; Shahryar; (San
Jose, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Jamshidi; Shahryar |
San Jose |
CA |
US |
|
|
Family ID: |
51529644 |
Appl. No.: |
13/815842 |
Filed: |
March 14, 2013 |
Current U.S.
Class: |
473/438 |
Current CPC
Class: |
A63B 69/0059 20130101;
A63B 69/002 20130101 |
Class at
Publication: |
473/438 |
International
Class: |
A63B 69/00 20060101
A63B069/00 |
Claims
1. A spiral passing system for training a football passer, worn by
the passer while passing a football, that causes inward pronation
of the passer's throwing arm's wrist in a manner that results in
passes with a perfect spiral.
2. The system of claim 1, comprising: a. a shoulder harness worn on
the passer's throwing arm shoulder, b. a wrist harness worn on the
passer's throwing arm wrist, and c. a control strap connecting the
shoulder harness to the wrist harness, with the control strap
adjustable to a length that pulls on the wrist harness when the
passer is throwing a football, in a manner that causes the wrist to
pronate inward as the football is released, so that the football is
thrown as a perfect spiral pass.
3. The system of claim 2, wherein the control strap includes a
length-adjusting buckle, by which the control strap is adjusted to
the length that causes such pronation of the wrist and throwing of
a spiral pass.
4. The system of claim 3, wherein the control strap is divided into
an upper segment attached to the shoulder harness, and a lower
segment attached to the wrist harness, with the two segments
connected to each other by a locking latch with two separable
sections, that allows those two control strap segments to be
detached from and reattached to each other when desired.
5. The system of claim 4, wherein the length-adjusting buckle of
the control strap is an integral part of one of the two separable
sections of the divided control strap's locking latch.
6. The system of claim 5, wherein the length-adjusting buckle of
the control strap is an integral part of the upper one of the two
separable sections of the locking latch, which is attached to the
upper segment of the control strap.
7. A spiral passing system for training a football passer to throw
a football as a perfect spiral pass, comprising: a. a shoulder
harness affixed to the passer's throwing arm shoulder, b. a wrist
harness affixed to the passer's throwing arm wrist, and c. a
control strap of adjustable length, attached to the top of the
shoulder harness, at an approximately 45 degree angle outward from
the shoulder and toward the passer's back, so that the control
strap can hang down the passer's back, can be pulled through the
space between the passer's body and throwing arm, can be wrapped
once around the throwing arm, and can be attached to the wrist
harness at the outside of that wrist, at an approximately 45 degree
angle back up the arm, and can be adjusted to a length such that
when the throwing arm is extended, tension produced by the control
strap causes the wrist harness and wrist on the throwing arm to
pronate inward, such that, when the passer is throwing a football,
the movement of the throwing arm's hand and fingers as the football
is released causes the football to be thrown with a longitudinal
spin that allows the passer to throw a perfect spiral pass.
8. The system of claim 7, wherein the control strap is divided into
an upper segment attached to the shoulder harness and a lower
segment attached to the wrist harness, with the two segments
connected to each other by a locking latch with two separable
sections, an upper section attached to the upper segment of the
control strap and a lower section attached to the lower segment of
the control strap, that allows those two control strap segments to
be detached from and reattached to each other when desired.
9. The system of claim 8, wherein the length-adjusting buckle of
the control strap is an integral part of one of the two separable
sections of the locking latch.
10. The system of claim 9, wherein the length-adjusting buckle of
the control strap is an integral part of the upper section of the
locking latch.
11. A spiral passing method for training a football passer,
comprising the passer wearing, while passing a football, a spiral
passing system that causes inward pronation of the passer's
throwing arm wrist in a manner that results in throwing the
football with a perfect spiral.
12. The method of claim 11, wherein the spiral passing system worn
by the passer comprises: a. a shoulder harness firmly affixed to
the passer's throwing arm shoulder, b. a wrist harness firmly
affixed around the passer's throwing arm wrist, and, c. a control
strap connecting the shoulder harness to the wrist harness, and
adjustable to a length that pulls on the wrist harness when the
passer is throwing a football, in a manner that causes the wrist to
pronate inward as the footballis released, so that the football is
thrown as a perfect spiral pass.
13. The method of claim 12, wherein the spiral passing system worn
by the passer has acontrol strap that includes a length-adjusting
buckle, which the passer uses to adjust thecontrol strapto a length
that causes it to pull on the wrist harness in a manner that causes
the wrist to pronate inward and the football to be thrown as a
spiral pass.
14. The method of claim 13, wherein the spiral passing system worn
by the passer has a control strap that is divided into an upper
segment, attached to the shoulder harness, and a lower segment,
attached to the wrist harness, with the two segments connected to
each other by a locking latch with two separable pieces, that
allows those two control strap segments to be detached from and
reattached to each other when desired.
15. A spiral passing method for training a football passer to throw
perfect spiral passes, comprising having the passer weara spiral
passing system comprising: a. a shoulder harness affixed to the
passer's throwing arm shoulder, b. a wrist harness affixed to the
passer's throwing arm wrist, and c. a control strap of adjustable
length, attached to the top of the shoulder harness, at an
approximately 45 degree angle outward from the shoulder and toward
the passer's back, so that the strap hangs down the passer's back,
where it is pulled through the space between the passer's body and
throwing arm, wrapped once around the throwing arm, and attached to
the wrist harness, outside of that wrist, at an approximately 45
degree angle back up the arm, and having the passer adjust the
control's strap's length, such that when the throwing arm is
extended, tension produced by the control strap causes the wrist
harness, wrist, and hand of the throwing arm to pronate inward,
such that, when the passer is throwing a football using a standard
grip and a standard throwing motion, the movement of the throwing
arm's hand and fingers when the football is released causes the
football to be thrown with a longitudinal spin that allows the
passer to throw a perfect spiral pass.
16. The method of claim 15, wherein the spiral passing system worn
by the passer has a control strap that is divided into an upper
segment, attached to the shoulder harness, and a lower segment,
attached to the wrist harness, with the two segments connected to
each other by a locking latch with two separable pieces, that
allows the passer to detach those two control strap segments from
each other, and to reattach them, when desired.
Description
FIELD OF THE INVENTION
[0001] The field of the invention is methods and systems for
training a football player to properly throw a pass.
BACKGROUND OF THE INVENTION
[0002] Football players who ever need to throw passes must learn
how to throw them properly, that is, as perfect spirals, spinning
rapidly about the football's longitudinal axis as they travel
toward the target. This allows the football to be thrown further,
faster, and more accurately, and to be caught by the receiver to
whom it is thrown more readily, than passes that wobble in flight.
A wobbling pass has the ends of the ball rotating about the
longitudinal axis as it spins, or worse, tumbles end over end. The
aerodynamics of a perfect spiral pass are vastly superior to those
of a wobbling or tumbling pass, which is much less able to cover
long distances, to accurately reach its target, or to be caught
cleanly by the receiver, than is a spiral pass.
[0003] Accordingly, many football players who are regularly
required to throw passes devote considerable effort to attempting
to learn how to regularly throw perfect spirals.
[0004] Many seek and receive specific training as to how to do
that, with varying degrees of effectiveness in the teaching, and
they achieve varying degrees of success in learning to throw
spirals.
[0005] It turns out that the most significant contributor to being
able to throw a spiral pass is the way the ball is released, and
especially the location and direction of movement of the passer's
fingers as the ball departs from contact with them. In particular,
the pass is most likely to be a perfect spiral if the throwing hand
pronates inward as the ball is released.
[0006] Some examples of sports-related art include the
following:
[0007] Blades, US 475,432, shows a shoulder strap supporting a
wrist cuff with flexible straps, but does not include a feature
that would impart a pronation bias to the wearer's hand. If the
Blades harness assembly were altered (for some reason) to promote a
wrist twist, such a modification would specifically defeat Blades'
objectives
[0008] McNee, U.S. Pat. No. 8,167,742, similarly has an adjustable
strap affixed to the wearer's thumb and shoulder as a training
device for helping a golfer feel the stroke through the tautness of
the training strap, but, as with Blades, if a twisting "pronation"
moment were to be imparted to the golfer's thumb it would defeat
McNee's stated purpose.
[0009] Brunty, U.S. Pat. No. 5,222,733, has a mechanical
contraption dedicated to maximum use of the wearer's latissimus
dorsi muscle, but apparently would countenance neither pronation
nor supination wrist action in ball delivery.
[0010] Starrett, et al, U.S. Pat. No. 3,888,482, features
interconnected strap segments to influence a baseball's spinning
reaction to wearer's fingers, but those strap segments only connect
the pitcher's wrist band and fingers to one another.
[0011] Wolf, U.S. Pat. No. 4,919,425, has a strap interconnected to
a basketball player's thumb, which directs a supination motion
imparted to quickly separate the shooter's "guide hand" from a
basketball, so as not to interfere with the thrust of the shooting
hand, but reversing the Wolf structure to force inward pronation of
the player's guide hand would entirely defeat Wolf's stated
purpose.
[0012] Smith, a World Intellectual Property Organization (WIPO)
publication, WO 03/080192, teaches a training aid in the form of a
rod sewn or otherwise attached along the shoulder of a football
jersey and interconnected by a strap to an arm harness to control
throwing of a football, but has no element of pronation.
[0013] Torbett, U.S. Pat. No. 6,199,208, focuses on pronation, but
his training device doesn't produce pronation, but instead
specifically resists it.
[0014] None of these contributes anything to what is needed, which
is a way of training a football passer to uniformly pronate the
throwing hand during release of the ball, so as to routinely throw
a perfect spiral pass.
SUMMARY OF THE INVENTION
[0015] The invention includes a spiral passing system and method
for training a football passer to consistently throw the football
in a perfect spiral pass, by connecting the passer's throwing
shoulder and throwing wrist, with a strap that tugs on the wrist,
pronating it inward, as the football is released, causing the ball
to spin longitudinally, as a spiral pass.
[0016] The spiral passing system comprises a shoulder harness, to
be worn firmly affixed to the shoulder of the passer's throwing
arm, a wrist harness, of adjustable inside diameter, to be snugly
affixed to the wrist of the passer's throwing arm, and a
non-stretchable control strap, adjustable in length, connecting the
shoulder harness and the wrist harness. The control strap can
optionally be divided into upper and lower segments, fastened
together by a locking latch. The control strap is securely attached
to the top of the shoulder harness, in a direction that causes the
other end of the strap to fall downward and outward behind the
passer's back, from which it is pulled under the passer's throwing
arm, then is wrapped once over and outside the passer's forearm,
and fastened to the wrist harness, which is snugly affixed to the
passer's wrist, and rotated so that the strap's attachment point is
on the outside of the passer's wrist, i.e., on the outside edge of
the wrist when the palm of that hand is horizontal and facing
downward. The length of the control strap is then adjusted so that,
when the passer extends the throwing arm, the control strap applies
tension to the wrist harness, causing the throwing hand's wrist to
be gently pronated inward, i.e., in a counterclockwise direction,
as viewed by the passer, for the right hand; or twisted in a
clockwise direction if passing with the left hand.
[0017] When throwing a pass, with the football being held in a
normal passing grip and the arm following a normal throwing motion,
travelling from above the throwing shoulder and across the front of
the passer's body, the spiral passing system causes the throwing
hand to pronate in the same inward direction, winding up at the end
of the throwing movement with its thumb pointing downward. This
movement of the throwing hand and its fingers during the throwing
of the pass causes the football to be released with the desired
longitudinal spin, i.e., to be thrown as a spiral pass.
[0018] After wearing the spiral passing system while practicing
throwing spiral passes for some period of time, because the length
of the control strap that tugs the wrist harness and causes the
wrist pronation is adjustable, the passer can start out with a
strong tug and then gradually loosen up the control strap to a
point that there is little or no tugging, with the wrist pronation
being done naturally by the passer. Eventually, the passer will
become accustomed to the feeling of the required inward pronation
of the wrist to produce that longitudinal spinning of the football,
and will be able to throw the same perfect spiral passes without
needing to use the system, perhaps reusing it occasionally while
practicing, to reinforce the sensation of the required
pronation.
[0019] The method of training an individual passer to regularly
throw perfect spiral passes comprises having the passer put on the
spiral passing system described and claimed herein, that is,
affixing to the passer's throwing arm shoulder a shoulder harness,
to which is connected a control strap, the other end of which is
connected to a wrist harness affixed to the passer's throwing arm
wrist, with the control strap hanging down the passer's back,
wrapped once around the passer's throwing arm and affixed to the
outside of the wrist harness, adjusting the control strap to a
length that tugs on the wrist harness, causing the passer's wrist
to pronate inward when the throwing arm is extended, such that,
having the passer use a normal football grip and a normal football
passing motion to throw a pass, the movement of the passer's
pronated wrist, hand, and fingers as the ball is released causes
the football to spin longitudinally, and the pass to be a perfect
spiral pass.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0020] FIG. 1 shows a right-handed passer, with the shoulder
harness on the right shoulder and the adjustable size wrist harness
on the right wrist, without the control strap that attaches
them.
[0021] FIG. 2 shows a right arm shoulder harness lying flat, with
the upper segment of a divided control strap fastened to the
harness, and ending at the length-adjustable upper section of the
optional locking latch that connects the upper and lower segments
of the control strap.
[0022] FIG. 3 shows the adjustable size wrist harness, with the
lower segment of a divided control strap fastened to it, and pulled
up and back over the lower forearm, ending at the non-adjustable
lower section of the control strap's optional locking latch.
[0023] FIG. 4 shows the wrist harness affixed around the passer's
right wrist, with the lower segment of the control strap fastened
to the wrist harness on the outside of the wrist, and wrapping up
and around the passer's lower forearm, ending at the lower section
of the control strap's optional locking latch.
[0024] FIG. 5 shows the view from the front of the passer wearing
the spiral passing system on the right throwing arm, with the
shoulder harness affixed to the shoulder, the wrist harness affixed
to the wrist, and the control strap, with upper and lower segments
joined by the locking latch, connecting the shoulder harness to the
wrist harness, with the strap dropping down from the shoulder
harness, behind the passer's back, inside the passer's throwing
arm, then being wrapped around and over the passer's forearm, and
fastened to the wrist harness at the outside of the passer's
wrist.
DETAILED DESCRIPTION OF THE INVENTION AND DRAWINGS
[0025] The invention includes a system and a method for training a
football passer to consistently throw the football in a perfect
spiral pass.
[0026] The spiral passing system comprises a shoulder harness, a
wrist harness, and a control strap connecting the two harnesses.
The system can be designed for use by a left or a right handed
passer; the drawings here show a right-handed system.
[0027] The passer wears the shoulder harness on the shoulder of his
passing arm, and the wrist harness on the wrist of that arm, both
very firmly affixed at their respective locations. The control
strap is firmly attached (for example sewn, as shown on the
drawing, or riveted) to the top of the shoulder harness, pointing
outward and backward, so that it hangs down the passer's back. From
there the strap is wrapped from the inside of the passer's throwing
arm, over the top of the forearm, and around to the point at which
it is firmly attached to the wrist harness, which is located at the
outside of the wrist (facing outward when the palm of the hand is
lying flat facing down). The length and tautness of the control
strap are adjusted by the passer, so that, when that throwing arm
is extended, the control strap tugs gently on the passer's wrist
harness, which causes the wrist to pronate inward, causing the
throwing hand to rotate its palm downward.
[0028] When a football is passed with the spiral passing system in
place and the control strap tautness properly adjusted, and using a
normal throwing motion and a normal grip, the effect of this
pronation of the wrist is that the direction of the extended
fingers, the last part of the hand to touch the football as it is
released, causes the football to assume a rapid longitudinal spin,
that is, to be thrown as a perfect spiral pass.
[0029] The design, components, and operation of the spiral passing
system and method are described and illustrated in more detail
below. The listed numbers of each component or feature shown on the
Figures have a first digit which reflects the first Figure number
on which that item appears.
[0030] FIG. 1 shows a right-handed passer, with the shoulder
harness 101 (not yet including the control strap) in place on the
passer's right shoulder, and, separately, the passer's right hand,
with the wrist harness 102 (again not yet including the control
strap) affixed around the right wrist.
[0031] The shoulder harness, which is worn firmly affixed to the
shoulder of the passer's throwing arm, has a short "sleeve"103,
with adjustable tightness, that extends part of the way down the
passer's throwing arm, and a securing section 104 that extends from
on top of the throwing shoulder, wrapping around the opposite side
of the passer's upper body, beneath the other arm. Together, these
features hold the shoulder harness very securely in place on the
passer's throwing arm shoulder.
[0032] FIG. 2 shows a right arm shoulder harness 101 lying flat,
with the upper segment 201 of the control strap that connects it to
the wrist harness fastened to the top of the shoulder harness at an
approximately 45 degree angle from the top of the shoulder,
pointing downward and toward the back of the harness. (In this case
the control strap is sewn to the shoulder harness, but it could be
fastened in other ways, e.g., riveted.)
[0033] The control strap is a non-stretchable strap than connects
the shoulder harness to the wrist harness. The control strap is
made of flexible but non-stretchable material, such as woven
fabric, leather, etc. It can be a single piece, made adjustable in
length by incorporating an ordinary adjusting buckle.
Alternatively, as illustrated in these Figures, the control strap
can be divided into upper 201 and lower 301 segments, connected to
one another by an optional locking latch, consisting of two pieces,
a male section 203, located at the bottom of the control strap's
upper segment (which in this version incorporates its own
length-adjusting buckle 204), which inserts and locks into the
female section 303 of the latch, located at the top of the control
strap's lower segment, attaching the two segments of the control
strap. FIG. 2 shows the upper segment 201 of the divided control
strap, attached to the shoulder harness 101, and ending at the male
section of the locking latch.
[0034] In FIG. 3, the female section 303 of the optional locking
latch is attached to the lower segment 301 of the control strap,
the other end of which is attached to the wrist harness 102. The
upper and lower sections of the locking latch could of course be
reversed on the control strap, with the male section on the lower
strap segment and the female section on the upper strap segment,
but if the male section has, as here, an integrated
length-adjustment buckle, it's more convenient for adjusting the
strap length to have that buckle on the upper strap segment.
[0035] The control strap (single length, or upper segment attached
to lower segment) connects the shoulder harness 101 to the wrist
harness 102. The control strap's length is adjustable by the
passer, using the length-adjustment buckle, whether it integrated
into a one-piece control strap, or is a part 204 of the locking
latch 203/303 connecting the upper and lower segments of the strap.
The version of the control strap that includes the locking latch
connecting the upper and lower segments of the strap allows the
passer to put on both the shoulder harness and the wrist harness,
then adjust the length of the control strap, then fasten the
locking latch attaching the two segments of the control strap to
test the strap's tautness. If the length of the strap needs further
adjustment, the passer can disconnect the locking latch, easily
make the length adjustment, and then reconnect the locking latch.
When next using the system, the passer can disconnect the locking
latch, easily put back on the shoulder and wrist harnesses, and
reconnect the locking latch, reattaching the two segments of the
control strap, without needing to readjust the control strap
length, or having difficulty putting on the wrist harness with the
control strap connection facing outward because of the tautness of
the strap.
[0036] FIG. 3 shows the wrist harness 102, with the lower segment
301 of the control strap fastened to the outside of the wrist
harness (i.e., the side of the wrist facing outward when the palm
of that hand is facing downward), at approximately a 45 degree
angle, such that when the wrist harness is on the wrist, the strap
can be directed up and inward on the arm of the passer. In this
figure and the next, the control strap has the non-adjustable
female section 303 of the optional locking latch, at the opposite
end of the lower control strap segment from the wrist harness. As
with the shoulder harness, the control strap can be sewn, as shown
in the Figures, or riveted, or otherwise securely fastened, to the
wrist harness, so long as it is very firmly fastened, and is not
loosened by the tugging generated by the system's use.
[0037] FIG. 4 shows the wrist harness 102 fastened snugly to the
passer's right wrist, viewed from above, with the lower segment 301
of the control strap fastened to the wrist harness at a point on
the outside of the wrist, and wrapping up and around the passer's
lower forearm, ending at the non-adjustable female section 303 of
the optional locking latch.
[0038] FIG. 5 shows the view from the front of the passer wearing
the spiral passing system on the right throwing arm. The shoulder
harness 101 is firmly affixed to the shoulder. The wrist harness
102 is firmly affixed to the wrist, and turned so that the control
strap's attachment point is on the outside of the passer's wrist.
The control strap, divided into upper 201 and lower 301 segments
attached by the locking latch 203/303, connects the shoulder
harness and the wrist harness, and is adjusted to its desired
length by the length-adjustment buckle 204 that is incorporated on
the male section of locking latch. The control strap drops down
from the shoulder harness, behind the passer's back, inside the
passer's throwing arm, then is wrapped around and over the passer's
forearm, and ends where it is fastened to the wrist harness, at the
outside of the passer's wrist.
[0039] The passer puts on the shoulder harness and wrist harness,
connected by the control strap, with or without the optional
locking latch. The length of the control strap is adjusted so that,
when the passer extends the throwing arm, the wrist strap and
the
[0040] wrist are gently pronated inward (counter clockwise from the
passer's viewpoint) by the tension applied to the wrist strap by
the tightened control strap.
[0041] When the passer throws a football pass with that right
throwing arm, wearing the spiral passing system and using a normal
passing grip (variations of which are discussed extensively in
available instructions on football passing), and following a normal
throwing motion (with the throwing hand travelling from above the
shoulder down and across the front of the passer's body), the
tension applied by the control strap causes that right throwing
hand to pronate in that same inward, counter clockwise, direction,
during the throw. The resulting movement of the throwing hand's
fingers, with the ball's last contact being with the passer's
fingertips, and generally the tip of the index finger, causes the
ball to be released with the desired longitudinal spin, i.e., to be
thrown as a perfect spiral pass.
[0042] Because the length of the control strap, which tugs the
wrist harness and causes the pronation of the wrist and hand, is
adjustable, the passer can start out with it causing a firm inward
tug on the wrist, and then, after using the spiral passing
systemfor some period of time, can gradually loosen the control
strap, causing less and less tugging, and eventually reaching the
point where there is no appreciable tugging by the control strap;
and the pronating motion is all being done naturally by the
passer.
[0043] Ultimately, the passer becomes sufficiently accustomed to
the feeling of the inward pronation of the wrist required to
produce that longitudinal spinning of the football, so as to be
able to uniformly throw the same perfect spiral passes without a
continuing need to use the spiral passing system. The passer may
choose to reuse the system occasionally, while practicing, to
reinforce the sensation of the wrist and hand movement required to
produce the spiral.
[0044] The shoulder harness 101 and wrist harness 102 of the spiral
passing system must of course be differently arranged designs to
function on a left versus a right throwing arm.
[0045] The control strap can comprise a single length of
non-stretchable material, with a built-in length-adjusting buckle.
In a preferable embodiment, the control strap comprises separate
upper 201 and lower 301 control strap segments, fastened together
by the optional locking latch 203/303. The divided control strap
with a locking latch can use a non-adjustable locking latch plus a
separate length-adjusting buckle, or, in the even more favorable
embodiment shown in FIGS. 2 and 5, the locking latch can itself
incorporate an integral length-adjusting buckle 204 for the control
strap.
[0046] The shoulder harness and wrist harness can be made of
appropriate fabrics or other materials, so long as they can be
firmly but comfortably affixed to the passer's shoulder and wrist,
respectively, with very little stretching or slipping occurring
while in use and being pulled on by the control strap. The ends of
the control strap can be sewn, riveted, or connected by other means
to the two harnesses, so long as they are very firmly and reliably
attached to them, allowing no appreciable stretching of the
connections when the system is in use, and no appreciable loosening
or tearing of the connections over the extended use of the
system.
* * * * *