close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2131880

код для вставки
Oct. 4, 1938e
A_ L_l BECKET
2,131,88@
RACKET v STRINGING DEVICE
Filed Nov. 3, 1934
H52"
Il
wil !
INVENTOR
4
"
_
`
y
my
d'
Patented Oct. 4, 1938
2,131,88@
UNITED STATES PATENT OFFICE
2,131,880
_
RACKET STRINGING DEVICE
Alan L. Becket, East Orange, N. J.
Application INovember a, 1934, serial No. 751,410
2 Claims.
This invention relates to a device for'stringing
rackets.
It relates particularly to what is known
as patching work. When one or more of the
strings in a racket become worn or broken it is
:nA
not necessary in most cases to r‘estring the entire
racket but merely to replace certain worn or
broken strings with new strings. The worn or
broken strings are cut outI and removed from the
racket. The new strings which take the place of
10 the strings removed must be joined at both ends
‘ with the strings left in the racket. One end of
the new string is looped with an end of the old
. string and the looped connection is pulled tightly
into a racket frame hole. The connection is
called a splice. The iirst splice is made with the
new string before it is strung in the racket and
thus the string may be gripped and is easy to
manipulate. After the new string is strung in
the racket its other end must then be spliced with
20 the end of the other portion of the old string left
in the racket.
This splice is a diñ‘lcult one to
‘ make and at the same time maintain a correct
tension on the new string.
Both new and old
strings must be tight while making this. ñnal
25 splice.
It is the object of this invention to make
it less difûcult to eiîect this final connection be
tween the strings in a patch.
In the drawing Fig. 1 is a side view of the
device. Figs. 2, 3, 4, 5, and 6 are views of clamp
30 ing members. Figs. 7, 8, 9, and 10 are views of
modiñcations of the device.
In Fig. 1 the arm I is placed against the out
side surface of a racket frameV 2, the clamping
jaws 3 grip the string 4 when pressure is exerted
35 laterally by the internally threaded cap 5 upon
the flanged sides of the jaws 3. The cap 5 is
screwed upwardly so that the jaws 3 are'squeezed
against the string 4 to clamp the string securely.
The position of the clamping means Sand 5 may
40 be adjusted on arm I by means of thumb screw 6.
Before the string is clamped itis first pulled to
the proper tension. A stringer’s awl may be used
to hold the string while the device is being ap
plied. The final splice is made by pulling the
45 looped strings into the string hole of tthe frame
where they become securely locked. It is ob
vious that the string 4 must be held taut while
the splice is being made‘ The common method
of making a patch connection or splice is to hold
50 the string 4 taut with a pair of pliers and at the
same time pull thru the splice.v This operation
is diñicult to manipulate. It results frequently
in the last string of a patch being loose instead
(C1. 273-73)
of being as tight as the other strings. By using this invention the pliers are not needed and
both hands of the Stringer become free to make
the splice. The device maintains the desired
tension. upon the last string of the patch. Fig. 2
is a jaw of the clamp member with corrugations
at ‘l and a centering recess at 8. Fig. 3 is the
opposite clamping jaw with centering promi
nence at 9.
Fig. 4 is a side View of a jaw showing
the hole I0 and threads I I. Fig. 5 is a clamping 10
member used to hold the jaws together as in a
chuck. Fig. 6 is a cross section of one form of
clamping means of threaded chuck construction;
Fig, 7 is a side view of a modified form of the
device in which the clamping means is a set 15
screw I2. Fig. 8 is a perspective view of same
showing the opening at I6 which permits an awl
to be introduced for the purpose of holding the
string while the device is applied. Fig. 9 is a side
view of the device showing the set screw I I carry
0
ing a corrugated swivel capY I3 and a double ad
justing set screw I4. Fig. l0 is a downward view
of Fig. 9 with set screw I2 omitted, the set screws
I4 make it possible to adjust the device against
the curved outside surface of a racket frame.
25
I claim:
1. A racket repairing device of the character
described consisting of a main body portion,
string clamp, frame brace and tightening means,
the said string clamp being located at one end
of said main body and the said frame brace be
ing located at the opposite end of said main body,
the said tightening means being located upon the
said body portion and being a part thereof con
O
sisting of a Screw means for drawing a racket
string tight when the said string clamp grips a 35
racket string and the said frame brace engages
the outside surface of a racket frame under pres
sure exerted by the said tightening means.
2. A racket Stringing device consisting of a
string clamp, brace member, body member and 40
tightening means, the said stringclamp being
located at one end of the body member and the
said brace member being located at one end of
the body member, the tightening means being
located upon the said body member between the 45
said string clamp and the said brace member,
the said tightening means providing screw means
for drawing a string toward the portion of a
racket frame upon which the said frame brace
is positioned.
50
ALAN L. BECKET.
Документ
Категория
Без категории
Просмотров
0
Размер файла
202 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа