Патент USA US2131880код 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.