DE1223282B - Bat for tennis or similar games - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

A63b

German: 77 a-49/12

Number: 1223 282

File number: L 386051 c / 77 a

Filing date: March 30, 1961

Opening day: August 18, 1966

The invention relates to a racket for tennis or similar games, the frame of which has a profile with two lateral beads, which are connected to one another by a web of lesser thickness are, wherein longitudinal grooves are formed on the inside and outside of the frame.

Rackets of this type allow the frame to be made of metal. With all known designs such rackets are the strings as in rackets with wooden frames through holes in the frame passed through, which are located in the web sections in this case.

Such clubs have not proven to be satisfactory. The holes in the web sections weaken the frame and reduce its resistance and elasticity. Moving in the strings in the holes is tedious and time consuming. Also has the kinking of the strings on the Sharp-edged bore edges result in premature wear of the strings.

It is also already known to use the strings in pairs in an ordinary wooden frame holes provided and on the inside of the frame through a to pull apart this twisted cord that grips the strings on the inside of the frame.

The object of the invention is to overcome the above-mentioned disadvantages in a racket of the type mentioned at the beginning Type to eliminate what is proposed according to the invention that the strings of the racket with the help by fastening members, which extend around the profile, are fastened to the frame, wherein the distance between the fastening members is determined by spacers in the outer longitudinal groove of the frame are arranged.

According to a first preferred design feature, the racket according to the invention is of this type designed that the strings by means of a wire wound around the frame in a manner known per se are attached to this, the turns of which are embedded in notches on the spacer are provided. Here, the strings can be provided with crankings by means of an elastic Crowns which engage with their apex sections in the inner longitudinal groove of the frame, the turns of the wire through the crests of the crimps and the strings over the base sections of the through-bends run. But it can also put the wire on the frame in Loops that form half-knots at the closing point, the free ends of which are in or over Rackets for tennis or similar games

Applicant:

Jean Rene Lacoste, Paris

Representative:

Dipl.-Ing. E. Jourdan, patent attorney,

Frankfurt / M., Freiherr-vom-Stein-Str. 18th

Named as inventor:
Jean Rene Lacoste, Paris

Claimed priority:

France of March 30, 1960 (822 934)

the inner longitudinal groove to the half-knot of the adjacent loops.

According to another preferred design feature, the fastening members are on the invented proper racket formed by rings that are pulled onto the frame. Preferably they are Rings held at the desired distance from one another by notches arranged on the spacers, it being possible for the rings to be arranged in twos side by side and the spacers by intermediate pieces can be formed with switch-shaped paragraphs at the ends, each of which engages under a ring. The rings can, however, also according to a different design feature, one inward have directed projection which engages in the outer longitudinal groove of the frame. Here is it is useful to mount the spacers by means of solder or easily formed bumps inside the to form the outer longitudinal groove of the frame.

Finally, the racket according to the invention can also be advantageously designed in that the inner longitudinal groove of the frame is dimensioned such that the elements of the string covering which engage in this groove are held in place by the beads against displacement transversely to the plane of the racket. Some exemplary embodiments designed according to the invention are shown schematically in the figures. It shows
Fig. 1 is a plan view of a tennis racket according to the invention,

F i g. 2 and 3 different racket frame profiles,

609 610/10

3 4

F i g. 4 is an enlarged perspective view of dynamically favorable shape and good elasticity

on the heart of the racket with the attachment opposite the covering. This is explained by the

of the frame on the handle, the fact that the cross-section of the profile is high

F i g. 5 is a plan view of the heart of the moment of inertia based on the center plane P

Racket with a different version of the fastening - 5 sits in the direction of this plane despite its lower strength,

the frame under control, experiments with such a frame, which is made of hard

F i g. 6 a cross-section according to line VI-VI was made in chrome-plated special steel tube

F i g. 5, brought particularly satisfactory results.

F i g. 7 is a perspective view of a frame- The frame 1 can be attached in various ways

section, the frame being attached to the handle 3 with an assembly io. A particularly cheap one

strip and a spiral winding for attachment.

the strings is provided, 9 of the frame 1 in mortises 10 of a stanchions

F i g. 8 is a section through the frame section core piece 11 are sunk, for example

according to FIG. 7 in the center plane of the racket,. made of wood, at the end of the assembly the

9 shows a perspective view of the lower 15 upper end of the core piece of a ferrule 12

Frame part is surrounded with a serrated crown for fastening, which is part of a

supply of the strings, tubular handle 3 can form. The cones

F i g. 10 a longitudinal section through a section of holes 10 and the inner surfaces of the ferrule can

of the lower frame part according to FIG. 9 be adapted to each other in the plane that they are along the

of the racket, 20 grooves 7 and 8 cling to the shape of the profile,

11 shows a perspective view of an albeit also a holder of the frame in FIG

Frame section with a differently designed loading mortise only with a clamp that is only

Fixing the strings against the bulges, sufficient strength

F i g. 12 to 15 other versions of the string result.

attachment in perspective view and in section 25 In view of the rigidity of the extensions 9

representations. 'it is also sufficient to place the core 11 between the

The in F i g. 1 racket has a frame, if necessary by gluing, insert,

men 1, which is bent from one into the desired shape, whereby the clamp 12 can then be omitted

nen profile according to the F i g. 2 or 3 made and can and the core the actual body of the handle

is completed by a cross brace 2. This forms 30.

Frame is attached to a handle 3 and carries the extensions 9 can also, as from the

Pages 4. F i g. 5 and 6 it can be seen in the end piece 13 of a

The profile forming the frame consists of two tubular handles 3 according to corresponding longitudinal beads 5, which are preferably rounded to fit, the parts being soldered, for example, by a core piece 6 of lesser thickness, so that they are soft or hard,
be separated that on the opposite Regardless of which type of assembly, wide profile surfaces> grooves 7 and 8 are formed. is selected, the attachment of the frame remains on the profile has a double tube shape, which is extremely robust handle, and it is achieved that a round or oval tube is resistant to permanent deformations opposing forces at diametrically opposed by torsion achieved. In addition, the points overlying the club can be deformed, in some cases balanced, the stiffness and the fact that the profile between the resistance of the two rollers of the desired cross-section adjacent to the handle is allowed to run through the frame part, the center of gravity running against the frame part . This deformation can be laid in one or in frames or more against the handle, which means two rolling passes are made. 45 is beneficial to the performance of the racket

The width and depth of the grooves can have different effects.

be borrowed. The two opposite pipe walls can all of these properties without sacrificing the

fertilizers, which form the core piece, can be achieved with ease of the racket. It is

stir (Fig. 2) or have a residual distance also possible, the weight of the racket

(Fig. 3). 50 by changing the wall thickness of the profile

To produce the frame, the one that speaks to is chosen ..

The above-described manner profiled material in such a way. Such a frame allows under particularly ratiobogen that the nelle and comfortable conditions forming the double tube profile lie the erfindungsge-beads 5 on both sides of the stringing plane, should fix the strings 16, which in detail on their position in F i G. 2 is represented by the line P. 55 different ways "can be carried out".

The cross brace 2 consists of a segment of the In the embodiment according to FIGS. 7 and 8 are the

same profile as the frame. This segment of strings with a spiral wound around the frame

is permanently attached to the rest of the frame part, 17 attached, for example, from piano wire,

preferably by soft or hard soldering. This type of fastening offers particular advantages. That

Assembly of the segment is very easy because after 60 turns of the wire spiral, the distance between the turns

The shape of the segment ends 2a or Zb must be different in order to maintain a constant

Depending on the shape of the frame profile, it doubles the distance between the different strings

To ensure a double bead of the frame and the cross brace, is the prerequisite

Leadership and thus perfect centering would be facilitated by the fact that in the outer frame

guarantee. 65 groove 8 of the frame a mounting strip 18 with a

A manufactured in the manner described above benl9 on its outer surface as a spacer

The frame offers a protruding in the lay direction, in which the turns of the spiral 17

Outstanding rigidity, but still has an aero-inlay. This mounting bar can be used in the

Club permanently, or it can be removed again after assembly.

Experiments with such a fastening of the strings have shown that the windings after Wrap and secure the spiral on the frame when the spiral is made of strong enough wire cannot slide or turn. The spiral can be tightened unhindered because the inner groove 7 of the profile saves the space required to retract the strings. The strings 16 can also run over two consecutive turns of wire without these turns thereby move. Finally, with the corresponding dimensions of the groove 7, the strings are in the direction held transversely to the racket level by the beads 5, causing warping or displacement of the stringing level is prevented.

The advantages mentioned above also result if the strings are not attached directly to the spiral will. With the type of covering according to FIG. 9 and 10 is a crown 20, preferably made of spring steel, with crankings for mounting the strings 21 used, the distances with respect to the frame circumference are so different that the The distances between the parallel strings always remain the same.

The winding of the frame and the crown with the spiral 17 is extremely convenient because the crown is in the inner groove 7 can be inserted, in which it holds itself under the effect of its own elasticity, without it being necessary to provide any special guide elements. To attach the spiral 17 can have a mounting strip similar to the strip 18 in FIG. 7 and 8 can be used or neither. The ends 20 α of the crowns are preferably bent over against the frame. Possibly can the bent end into an opening

20 b of the profile can be introduced on the inner core wall.

The spiral runs through the apex sections

21 α of the throws. The strings 16 encompass the through-bends at their base sections 21 and run outside the spiral, as shown in FIG. 10 emerges. Here, too, the groove 7 provides the strings with the necessary passage, and the beads guide and hold the crown in place, thereby preventing the string from vibrating or shifting locally. A covering produced in this way offers a particularly high level of elasticity as a result of the cooperation of the crown 20.

Fig. 11 shows another type of attachment of the spiral wire 17 to the profile frame 1. In this embodiment the wire is wound so that it forms closed loops 17 a, which is at the closing point the wire crosses and forms half knots 17 &. The strings are looped around the half knots 17 & and are kept by this at suitable intervals, whereby sharp kinks are avoided. The strings are held in place on the frame by the beads 5. To the loop width of the To enlarge strings 16, a dead turn 17 c in the loops 17 α by double wrapping inserted. In the outer groove 8, a mounting bar 18 is preferably inserted as a spacer.

Another way of attaching the strings to the frame is through their use of rings 22 drawn onto the frame. In Fig. 12, such rings are made, for example, of metal Rings of rounded cross-section held at intervals by tubular spacers 23, whose Lengths are chosen according to the constant spacing of the strings. The intermediate pieces 23 have notches 24 at the ends which allow the strings 16 to pass through. The groove 7 leads the Strings and allows in conjunction with the notches 24 assembly of the strings without the need consists in using intricately shaped rings. the

ίο strings can comprise one or more rings, the latter can be arranged at intervals or directly adjacent to one another.

In the case of the explanations according to FIG. 13 and 14 are the tubular spacers notched by Mounting strips 25 replaced as spacers, which are fastened in the outer groove 8 of the profile.

In the embodiment according to FIG. 15 has a ring on its against the outside of the racket Part an inwardly directed projection 27 which fits into the groove 8 of the profile. The string 16 is guided and held in the groove 7. The rings 26 can be through spacers, as described above, are kept at a distance. It is also possible in the groove 8 between the pre-jumps 27 small bumps 28 made of solder or glue, the latter for example based on ethoxylin resin, attached to hold the rings in the desired position.

Claims (10)

, 0 claims: 1. Racket for tennis or similar games, the frame of which has a profile with two sides Has beads which are connected to one another by a web of smaller thickness, wherein longitudinal grooves are formed on the inside and outside of the frame, characterized in that that the strings (16) of the racket with the help of fastening members (17, 22, 26), which extend around the profile, are attached to the frame, the distance the fastening members is determined by spacers (18, 25, 28) in the outer longitudinal groove (8) of the frame are arranged. 2. Racket according to claim 1, characterized in that the strings by means of a per se In a known manner, the wire wound around the frame is fastened to the latter, its turns are let into notches (19) which are provided on the spacer (18). 3. Racket according to claim 2, characterized in that the strings (16) are grasped by means of an elastic crown (20) provided with crankings (21), which crowns (21a) in the inner longitudinal groove (17) of the frame ( 1) engage, the turns of the wire (17) running through the apex sections (21a) of the crankings (21) and the strings running over the base sections (21b) of the crankings. 4. Racket according to claim 2, characterized in that the wire (17) on the frame (1) is wound in loops (17 a) which form half-knots (17 b) at the closing point, the free ends of which are in or above the inner one Longitudinal groove (7) lead to the half-knot of the adjacent loops. 5. Racket according to claim 1, characterized in that the fastening members by rings (22,26) are formed, which are pulled onto the frame (1). 6. Racket according to claim 5, characterized in that the rings (22) through to the spacers (25) arranged notches (2.7) are kept at the desired distance from one another. 7. Racket according to claim 6, characterized in that the rings (22) to two side by side are arranged and that the spacers by spacers (25) with shoulder-shaped Paragraphs are formed at the ends, each of which engages under a ring. 8. Racket according to claim 5, characterized in that the rings (26) each one inwards have directed projection (27) which engages in the outer longitudinal groove (8) of the frame (1). 9. Racket according to claim 8, characterized in that the spacers are through of solder or glue-formed elevations (28) in the interior of the outer longitudinal groove (8) of the frame are formed. 10. Racket according to one of the preceding claims, characterized in that the inner longitudinal groove (7) of the frame (1) is dimensioned such that the elements (16, 17 b, 20) of the string covering which engage in this groove through the Beads (5) are held against displacement transversely to the racket level. Considered publications:
German Patent No. 373 897;
British Patent No. 522 222;
U.S. Patent Nos. 2171 223, 1733 960. 1 sheet of drawings 609 610/10 8.66 © Bundesdruckerei Berlin