WO1991010481A2 - Appareil de controle des tamis de raquettes - Google Patents

Appareil de controle des tamis de raquettes Download PDF

Info

Publication number
WO1991010481A2
WO1991010481A2 PCT/EP1991/000029 EP9100029W WO9110481A2 WO 1991010481 A2 WO1991010481 A2 WO 1991010481A2 EP 9100029 W EP9100029 W EP 9100029W WO 9110481 A2 WO9110481 A2 WO 9110481A2
Authority
WO
WIPO (PCT)
Prior art keywords
racket
stringing
covering
hardness
measurement
Prior art date
Application number
PCT/EP1991/000029
Other languages
German (de)
English (en)
Other versions
WO1991010481A3 (fr
Inventor
Heiderose Brunner
Original Assignee
Heiderose Brunner
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heiderose Brunner filed Critical Heiderose Brunner
Priority to EP91901742A priority Critical patent/EP0530193B1/fr
Priority to DE59108981T priority patent/DE59108981D1/de
Publication of WO1991010481A2 publication Critical patent/WO1991010481A2/fr
Publication of WO1991010481A3 publication Critical patent/WO1991010481A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • A63B71/0622—Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/005—Devices for measuring the tension of strings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/02—Tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/08—Characteristics of used materials magnetic
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/51—Force
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/56—Pressure
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/58—Measurement of force related parameters by electric or magnetic means
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B47/00—Devices for handling or treating balls, e.g. for holding or carrying balls
    • A63B47/008—Devices for measuring or verifying ball characteristics

Definitions

  • the invention relates to a device for controlling the covering, in particular the covering hardness and the covering elasticity of ball rackets, preferably tennis rackets, which consist of a handle and a frame delimiting a surface which is covered by means of cables, so-called strings, which are within the frame delimitation are so intertwined that they are a square
  • the mesh size is designed so that the air resistance when swinging is as low as possible.
  • Known devices for measuring the racket hardness are either too large and therefore bulky and complicated to use, or too imprecise in the measurement value acquisition.
  • the racket frames are placed on a support surface and the covering (the mesh) is loaded by weights.
  • EP-OS 0 257 627 describes a device for testing the covering hardness. This is the first handy device for measuring the covering hardness. Since the measurement value is determined by means of a compressible spring, which is pressed against the fabric by a pressure plate, the distance covered, which means the measurement distance, is too short.
  • US Pat. No. 794,305 describes a similar device which also works on the basis of the measurement value determination by means of a compressible spring and thus has corresponding inadequacies, such as that of EP-OS 0 257 627. Above all, this device does not compensate for the measurement lead errors and compensates for them when determining measured values.
  • WO 86-01596 describes a device for measuring the racket covering, according to which a measurement is carried out at several points of the covering and a tension factor is then determined.
  • the device has so much mechanical freedom that the measured values, without pre-adjustment, only represent approximate values.
  • the bat arm is exposed to severe physical stress. Joint inflammation occurs, one speaks of the tennis elbow.
  • the stringing hardness is a direct function of the tensile force with which the strings are drawn into and fixed in the racket frame.
  • the string elasticity means the resilience of the racket string in the starting base and depends in part on the stringing type when stringing the racket, but mainly on the quality of the strings.
  • the racket covering is therefore the most important element in the construction of a ball racket.
  • the covering hardness and the covering elasticity are of equal importance.
  • the covering hardness changes relatively quickly after re-covering a ball racket, as the covering is static. If it is too hard or too soft, it affects the playing behavior by changing the feeling of the ball.
  • the object of the invention is therefore to find a racket stringing controller which meets the requirements set in practice, in particular of tennis game, namely the measurement of the stringing hardness of rackets in detail and the measurement of the stringing elasticity of rackets in combination, by means of one and the same device in one subsequent work step or in parallel at the same time, as well as the determination of the drawn stringing hardness and elasticity in differently sized racket sizes and different string densities of the racket stringing in combination.
  • the new device should have a high measurement value resolution and be insensitive to influences that occur during play, such as uneven stringing of the racket, asymmetry of the strings, temperature differences and the like.
  • the mesh density depending on the racket size or special covering, as well as micro covering should not play a role.
  • Stringing hardness and the stringing elasticity of ball rackets for practicing ball game sport which consist of a handle and a frame that delimits an area, which is so called by means of cables, so-called strings, the covering being a flocked network of meshes made of square mesh holes, which represents the elastic resistance area required for a game ball offers and the mesh size is designed so that the air resistance when swinging is as low as possible,
  • Has measured value resolution for recording the racket covering hardness and covering elasticity and the directly related covering covering hardness and covering elasticity is measured in parallel or in succession in one procedure, whereby the device eliminates any irregularities in the covering surface or other external influences through self-adjustment until the start of the actual control measurement the control measured value is determined via the detection of clamping force generated by tension or pressure on the measurement object, which is done by solved the following features and the device consists of the following components or groups of components;
  • clamping force detection consisting of the springs (16) and
  • Soannkraftauswert- and display part consisting of the
  • Measurement object determines the tension forces in directly readable values of the racket covering hardness, in addition c ad) a clamping force evaluation and display part 0, for recording the racket covering hardness, taking into account differently sized ball racket sizes with different string covering density, consisting of
  • Rotary knob 8 axially movable and freely rotatable adjusting ring 61, with a marking arrow 66, a calibrated scale S, with the racket dimension area markings 63, 64, 65 and the marking 36 located on the housing, and part P for compensating the string tension density consists of one on the adjusting ring 61, permanently attached window 62 through which the calibration 60 attached to the rotary knob base can be seen, furthermore b) a part b, the part causing the clamping force,
  • a surface element as a counter part to the supporting surface of part a, consisting of an optionally divided, possibly different sized, preferably circular part in the form of a disk or disks
  • a signal is emitted after self-adjustment is complete
  • the display 5 is set to "zero", or the symbol 74 must go out or light up, after which the actual control measurement is then carried out.
  • the self-adjustment compensates for all system-related differences, regardless of whether they are physical in nature, due to the overall internal structure of the device itself, the racket covering, the use of string protectors or something else.
  • the impulse and impulse recording system by means of the impulse element is also of particular importance
  • these elements can be used to determine the required constant distance in the axial direction to determine the measuring-effective clamping forces during the control measurement in such a way that the necessary pulses are counted and displayed. Furthermore, by means of these elements, the counteracting forces in the axial direction, due to the relaxation pressure (back tension pressure) of the spring 17 in part a, to the clamping force to be measured from the counter part b, are compensated during the actual measuring process in such a way that the pulse counting system of the elements 37 and 38 the the the
  • the magnets 38 which are attached at regular intervals on the turntable 11, trigger pulses which are detected when the turntable is rotated by the reed switch 37 located outside the turntable.
  • the pulses are counted by means of the electronics 32. As a result, the turntable rotation can be detected whether it is fully or in part.
  • This type of route detection represents an alternative to route detection by means of all-round and fixed point marking, as in claim 5.
  • the invention is illustrated by way of example with reference to FIGS. 1 to 8 .
  • Fig. 1 shows the parts a and b of the racket stringing control device. The device is demonstrated in the position before starting a measurement with a
  • Fig. 2 shows the racket string control device in
  • Section A-A in operation shortly before the connection of parts a and b with the racket covering 2 in between.
  • FIG. 3 shows the section A-A of part b of the racket stringing control device in the dimension approximately corresponding to that in practice, with a clearer illustration of the details.
  • FIG. 4 shows the section A-A of part b in an expanded version with an additional part for measuring the quality of elastic pushballs.
  • FIG. 8 shows the table for compensation correction with different mesh densities of the covering in combination with the display according to FIG. 6.
  • the inventive functional principle of measuring the stringing hardness and the stringing elasticity of ball rackets for the games badminton, squash and the like, but in particular tennis, is based on the transmission of
  • Compressive or tensile forces as in the present case, which are built up by means of the two device parts a and b of the racket stringing control device and are transferred to a bendable stretch mark 20.
  • the stretch marks experiences a bend due to the action of forces and thus a stretch, which is recorded as a linear resistance value.
  • This resistance value is converted into digitally readable values in the electronic measurement conversion device 32 and transmitted to the digital display 5.
  • the function is as follows.
  • the pressure build-up for measurement in the measuring device, part a takes place by tightening part b, in particular the receiving mechanism 24 - here screw thread - by the feed mechanism 13 - here nut thread - in part a, by turning the rotary knob 8.
  • the rotary knob 8 is connected to the threshing disk 11 via the connecting element 12 and this is connected to the feed mechanism 13 via the feed guide 14.
  • Parts 11 and 12 are mechanically fixed in the direction of rotation and can be moved in the axial direction so that the device cannot be influenced from the outside. is.
  • the measurement of the racket covering is carried out as follows.
  • the support wheel of the measuring part a is placed on the center of the covering of a racket, a space being present between the supporting edge 29 and the depression 3 which is required for a distance of the covering which is caused by the contact pressure of the supporting disc 21/22 of the counter element b arises.
  • the counter element, part b is inserted in the middle of the racket covering in the receiving hole 26 of the measuring part a and by turning of the rotary head 8 to the right or left, associated with the feed mechanism 13.
  • the rotary knob is turned further until the covering 30 of the support disc 21/22 is in good contact with the racket covering 2.
  • Pad 30 is intended to prevent the disk 21/22 from turning during the measurement. In practice, covering 30 is rarely required.
  • the closed contacts 34 and 35 can act as force transmission elements from spring 16 to spring 17 with the strain gauge 20, or piezo block act.
  • the short circuit of the contacts 35 and 34 which causes the measuring electronics 32 to be switched on automatically, indicates with a signal that the racket stringing control device is ready to measure.
  • the readiness for measurement of the electronics can be determined via the or an reached stretch value of the strain gauge 20 in conjunction with the spring 17.
  • the contacts 34 and and 35 and the feed mechanism 13 act directly on the spring 17 and the stretch marks 20.
  • the actual control measurement is carried out after the start signal tone has subsided or the completion of the adjustment process has been indicated in some other way.
  • the measurement of the stringing hardness and the stringing elasticity of the racket is now carried out by turning the rotary knob 8 in the functional direction, normally clockwise, in such a way that the counter element b, with the same stringing hardness, the same racket size and the same racket stringing density (number of strings), always a fixed, constant Distance traveled in the axial direction of the device.
  • This route can be achieved by various measures. For example, by turning the rotary knob one turn by 360 °, by advancing signal to beep and the like.
  • Screw part 24 is pulled from part b by rotation, the specified distance depends on the thread module and does not necessarily have to be expressed in length measuring units.
  • the feed mechanism in part a converts the tension on the racket covering by means of part b into axial pressure.
  • the strain of the strain gauge is evaluated electronically and transmitted to a readable display.
  • the electronic part consists of commercially available modules or a circuit-integrated module (chip) specially designed for the inventive device.
  • the value determined after the first turn of the knob represents the racket covering hardness. Then the racket elasticity is determined by a further turn of the rotary knob by 360. Depending on the racket material, the strings, the racket elasticity can also be determined by a further rotation of the rotary knob by 360 °.
  • This different pulling force is described as. converted into pressure force transferred to the strain gauge 20, the strain values electronically converted in the measuring conversion device 32 and transferred to the measured value display 5.
  • the measured values for the club stringing hardness and the club stringing elasticity are alternatively shown on a display 5 in succession on one and the same disolay, or simultaneously on two separate displays.
  • ABSRU measuring unit
  • the "ABRU” measured value is a value for assessing the covering materials used for racket covering, which must always be considered in relation to the measured covering hardness.
  • the device is supplied with the required electrical current via a current source, here a battery 7.
  • an all-round marking 36 with numbers, letters or other subdivisions is attached to the body 25.
  • the knob 8 is provided with only one mark.
  • the marking 39 (for example an arrow) points to a fixed point on the all-round marking 36.
  • the respective 360 revolutions of the rotary knob 8 then take place during the measuring process to the same fixed point.
  • the marking 39 can be located on the fixed body 25 and the all-round marking 36 on the rotary knob 8, as in FIGS. 6 and 7.
  • the magnets 38 which are attached at regular intervals on the turntable 11 all around and act on the reed switch 37 when the turntable rotates, enable the required rotation range of the Knob 8 for the respective measurement types, or are integrated directly into the electronics in terms of circuitry.
  • the ball test add-on device N shown in FIG. 4 with the lockable hanging bracket 40 on part a, the foldable legs 43 and 44 with the axis of rotation 45, the contact surface for the ball 42 to be tested and the counter part M allow the quality to be taken into account with the same inventive device on elasticity, of elastic
  • the additional device can be used to change the ball's pitch, so that the change in elasticity can be detected even with the smallest deviations.
  • the different racket tension or pressure values necessitate a correction of the kp values, based on the representations shown in FIGS. 6 and 7 and 8.
  • the measurement procedure for the values of the racket covering hardness is as follows, in addition to the standard measurement;
  • scale 72 is used and the kp value to be subtracted from the display value of the display 5 in
  • FIG. 5 demonstrates the determination of the "ABRU" measuring unit
  • the measurement object 51 in the present case strings as racket covering material, is moved in the direction of the axis x over a constant distance by means of a support size 52. This distance can always be increased successively in constant values and used as a measurement.
  • the constant distance in the direction of the axis x which is always predetermined, and which is deflected in the direction of the axis Y in a measurement-neutral manner, acts completely on the measuring system 55, which rests rigidly on 56.
  • the measuring system 55 measures the transmitted force and displays it in readable units. Ideally, the measuring system 55 is connected to 56 in a totally rigid manner.
  • the full force build-up acts fully on the measuring system 55, as well as on the anchoring 56, due to the clear path specifications from the measurement object 51 in axis x, or in deflection on axis Y, and is thus clearly and precisely measurable.
  • the different expandability of the measurement object 51 which is or can be preloaded with different force in the direction of the axis z, acts in combination on a fixed distance specification 53 with different force values in the axis x or Y on the measurement system 55.
  • the "ABRU” measuring unit has a fixed relationship with a prestressed measurement object in axis z, a constant distance 53 in axis x and a different extensibility and length of the measurement object 51, from case to case.
  • the "ABRU” measuring unit allows the stretchability of the measuring object 51 to be determined under the variables described.
  • a force drawn from a kp weight in axis z acting on the measuring object 51, which is in fixed connection with position 57 (for example a frame) in relation to a constant distance in the size of 2 mm in axis x results in a force measurement which also as Measurement object restoring force or elasticity can be defined, which determines the value of the extensibility of the measurement object 51 and can be calculated in combination with the length of the measurement object 51 in "ABRU" measurement units.
  • the value of the extensibility can also be in acceleration values, for example on playing balls, or in
  • Restoring force can be designed.
  • the measurement object and the reset value unit of time, based on the length and the tensile force acting on the measurement object 51.
  • SMA string measuring pad in mm, values, o or natural number
  • FAE area "ABRU" elasticity unit for several reasons
  • SA number of strings for FAE and FSR a number of 2 or more
  • the string measuring support SMA in practice the disc 22 or 21 and 22 of the counter element b, always comprises 4 main and 4 cross strings which are synonymous with the middle one
  • the string path measuring section SW is a fixed, constant unit, which is expressed, for example, in mm and is 2, 3 or 4 mm. The user does not have to take this into account, since the treatment procedure already includes revolutions of the rotary knob 8. a. ) Measurement of racket hardness
  • the covering of a ball racket takes place with a given tensile force of, for example, 25 kp.
  • the measured value appears on display 5.
  • the covering elasticity is compared with the measured values.
  • Table 1 or in the FRW column of Table 2, has a good, otherwise a bad racket covering.
  • the string manufacturer passes on the following values to the market: a) String restoring force for 8 strings (4 longitudinal and 4 transverse) with 2 mm measuring distance in the good range from kp to kp (according to string length) related to normal head, midsize and oversize rackets for the Popular sport. b) ABRU units from 2 mm measuring distance in the good range from AE to AE precisely matched to the club size. For the professional player, who can calculate the ABRU units according to the calculation mode and compare them with the specifications of the string manufacturer.
  • SW string travel measuring distance

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Heat Treatment Of Steel (AREA)
  • Glass Compositions (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Golf Clubs (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

Appareil de contrôle des tamis de raquettes et procédé de mesure de la dureté et de l'élasticité des tamis des raquettes employées dans les jeux de balle, comme le tennis, le squash ou le badminton, avec une précision de mesure élevée et, par conséquent, des valeurs de mesure très précises et d'une bonne reproductibilité pour le contrôle des tamis des raquettes, même de dimensions et de densité différentes. La dureté du tamis est mesurée individuellement et l'élasticité du tamis est mesurée dans une procédure de mesure parallèlement ou successivement, l'appareil élimine, par un ajustement propre, jusqu'au début de la mesure de contrôle proprement dite, les irrégularités existantes en ce qui concerne le tamis ou les défauts dus à d'autres influences externes ou internes, la saisie des valeurs de contrôle s'effectue par le calcul de la force de tension produite par une traction ou une pression sur l'objet de la mesure, force de tension qui est évaluée électroniquement par un transfert sur un élément de saisie, et la valeur mesurée est reportée sur un dispositif d'affichage.
PCT/EP1991/000029 1990-01-11 1991-01-10 Appareil de controle des tamis de raquettes WO1991010481A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91901742A EP0530193B1 (fr) 1990-01-11 1991-01-10 Appareil de controle des tamis de raquettes
DE59108981T DE59108981D1 (en) 1990-01-11 1991-01-10 Schlägerbespannungskontrollgerät

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP1990/000060 WO1991010480A1 (fr) 1990-01-11 1990-01-11 Appareil de controle du cordage d'une raquette
AUPCT/EP90/00060 1990-01-11

Publications (2)

Publication Number Publication Date
WO1991010481A2 true WO1991010481A2 (fr) 1991-07-25
WO1991010481A3 WO1991010481A3 (fr) 1991-09-05

Family

ID=8165458

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP1990/000060 WO1991010480A1 (fr) 1990-01-11 1990-01-11 Appareil de controle du cordage d'une raquette
PCT/EP1991/000029 WO1991010481A2 (fr) 1990-01-11 1991-01-10 Appareil de controle des tamis de raquettes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000060 WO1991010480A1 (fr) 1990-01-11 1990-01-11 Appareil de controle du cordage d'une raquette

Country Status (6)

Country Link
EP (1) EP0530193B1 (fr)
AT (1) ATE165742T1 (fr)
AU (1) AU7050591A (fr)
DE (1) DE59108981D1 (fr)
ES (1) ES2119771T3 (fr)
WO (2) WO1991010480A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410318A1 (de) * 1994-03-25 1995-09-28 Gerold Anderka Verfahren und Prüfgerät zur Messung der Spannung in Saiten von Tennis-, Squash- und Badminton-Schlägern
EP1857154A1 (fr) * 2006-05-15 2007-11-21 Adolf Brunner Appareil de mesure du cordage d'une raquette de jeu de balle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6671632B2 (en) * 2002-05-14 2003-12-30 General Electric Company Methods and apparatus for determining resilience of spring washers
DE202019104545U1 (de) 2019-08-19 2019-08-30 Heribert Schmid Kombinationsgerät für Schlägerbespannung und Spielball
US11607589B1 (en) 2020-10-01 2023-03-21 Mark E. Van Denend Device for accurately measuring string bed stiffness in a racket
CN114459892B (zh) * 2022-02-21 2023-11-24 江苏普乐菲新材料有限公司 一种球拍线强度智能检测设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001596A1 (fr) * 1984-08-24 1986-03-13 Lightfoot Benjamin H Procede et appareil de determination de la tension et de la pression
DE3532767A1 (de) * 1985-09-13 1987-03-19 Hermann Dipl Ing Hinrichsmeyer Verfahren und vorrichtung zur ermittlung der spannkraft der einzelnen saiten von bespannten ballschlaegern, insbesondere tennisschlaegern
US4794805A (en) * 1987-05-04 1989-01-03 Carney William P Tennis racket string tension tester

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001596A1 (fr) * 1984-08-24 1986-03-13 Lightfoot Benjamin H Procede et appareil de determination de la tension et de la pression
DE3532767A1 (de) * 1985-09-13 1987-03-19 Hermann Dipl Ing Hinrichsmeyer Verfahren und vorrichtung zur ermittlung der spannkraft der einzelnen saiten von bespannten ballschlaegern, insbesondere tennisschlaegern
US4794805A (en) * 1987-05-04 1989-01-03 Carney William P Tennis racket string tension tester

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410318A1 (de) * 1994-03-25 1995-09-28 Gerold Anderka Verfahren und Prüfgerät zur Messung der Spannung in Saiten von Tennis-, Squash- und Badminton-Schlägern
DE4410318C2 (de) * 1994-03-25 1999-05-20 Gerold Anderka Verfahren und Prüfgerät zur Messung der Spannung in Saiten von Tennis-, Squash- und Badminton-Schlägern
EP1857154A1 (fr) * 2006-05-15 2007-11-21 Adolf Brunner Appareil de mesure du cordage d'une raquette de jeu de balle
US7600437B2 (en) 2006-05-15 2009-10-13 Adolf Brunner Devices for measuring strings of a racket and ball quality

Also Published As

Publication number Publication date
EP0530193A1 (fr) 1993-03-10
WO1991010481A3 (fr) 1991-09-05
DE59108981D1 (en) 1998-06-10
AU7050591A (en) 1991-08-05
EP0530193B1 (fr) 1998-05-06
ATE165742T1 (de) 1998-05-15
WO1991010480A1 (fr) 1991-07-25
ES2119771T3 (es) 1998-10-16

Similar Documents

Publication Publication Date Title
EP1857154A1 (fr) Appareil de mesure du cordage d'une raquette de jeu de balle
EP1041925B1 (fr) Procede et appareil de mesure pour determiner la pression sanguine
DE2137054A1 (de) System zur Messung des Schwungs eines Sportlers
US4590808A (en) Method and apparatus for determining tension and pressure
DE602004005410T2 (de) Verfahren und Gerät zur Charakerisierung einer Kontaktfläche, z. B. einer Kunststoffrasenfläche
US10814186B2 (en) Portable tennis ball testing device
WO2009043558A1 (fr) Capteur de force pour manche de raquette
EP1296746A1 (fr) Dispositif d'entrainement pour effectuer une succession de mouvements
EP0530193B1 (fr) Appareil de controle des tamis de raquettes
EP0074359B1 (fr) Appareil de mesure pour raquette de tennis
DE3436218C2 (fr)
DE2916735C2 (de) Prüfgerät zum Prüfen der Bespannungshärte von Tennisschlägerbespannungen
EP0257627B1 (fr) Dispositif pour contrôler le cordage de raquettes
DE29608620U1 (de) Meßstation zur Erfassung des winkelabhängigen Muskeltonus
DE4410318C2 (de) Verfahren und Prüfgerät zur Messung der Spannung in Saiten von Tennis-, Squash- und Badminton-Schlägern
DE19608995C1 (de) Verfahren und Prüfgerät zur Messung der Spannung in Saiten von Tennis-, Squash- oder Badminton-Schlägern
DE4107716C2 (de) Vorrichtung zum Feststellen des Aufschlages eines Golfballes auf einer Fläche, insbesondere auf einem Grün eines Golfplatzes
DE102009046643B4 (de) Vorrichtung zur Messung der Tibiaverschiebung
DE3442428A1 (de) Vorrichtung und pruefgeraet zur pruefung der bespannungshaerte eines ballschlaegers
DE97468C (fr)
DE3225843A1 (de) Vorrichtung zum kontrollieren der fuehrung und/oder haltung eines schlaegers fuer ballspiele
DE3822521A1 (de) Verfahren zur messung der qualitaet von sportschlaegern sowie vorrichtung
DE8716705U1 (de) Vorrichtung zur Prüfung der Härte eines Tennisballs
DE102010034353A1 (de) Vorrichtung zur Ermittlung einer Stoßrichtung
DE816762C (de) Vorrichtung zum Messen und Pruefen luftgefuellter Spielbaelle auf Mass, Form und physikalische Eigenschaften

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AU BR JP KR SU US

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

AK Designated states

Kind code of ref document: A3

Designated state(s): AU BR JP KR SU US

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1991901742

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991901742

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1991901742

Country of ref document: EP