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Publication numberUS3075773 A
Publication typeGrant
Publication dateJan 29, 1963
Filing dateAug 1, 1960
Priority dateAug 1, 1960
Publication numberUS 3075773 A, US 3075773A, US-A-3075773, US3075773 A, US3075773A
InventorsKaufman Samuel J
Original AssigneeKaufman Samuel J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Golf swing groover and indicator
US 3075773 A
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Description  (OCR text may contain errors)

Jan. 29, 1963 5. J. KAUFMAN 3,075,773

GOLF SWING GROOVER AND INDICATOR Filed Aug. 1, 1960 2 Sheets-Sheet 1 IN VEN TOR.

ATTORNEYS.

Jan- 29 S. J. KAUFMAN GOLF SWING GROOVER AND INDICATOR 2 Sheet t 2 INV Q M ?AW 7704'. a z

Filed 1, 1960 ATTORNEYS.

United States Patent 3,675,773 GGLF SWHNG GRODVER AND INDICATGR Samuel J. Kaufman, 8645 N. Kedvale Ave, Skolrie, Ill. Filed Aug. 1, 1966, Ser. No. 46,593 9 Ciaims. (Cl. 273186) This invention relates generally to educational apparatus, and more particularly to a new and improved attachment for golf clubs which serves to greatly improve the accuracy and power of a golfers swing.

Those familiar with the game of golf appreciate the importance of proper form and speed in all phases of a golfers swing, from the backswing to the downswing and the follow-through. As a result, most of the teaching time of a professional golf instructor is utilized towards the improvement of a golfers swing but the inherent difficulties of proper analysis of a swing by visual observation alone are obvious. Various devices have been proposed heretofore to facilitate this analysis, but such devices have not proved completely satisfactory. Thus, various complex electrical and/ or photographic apparatus have been suggested for golf swing analysis, but the relatively high cost and complexity of such apparatus have limited their adoption.

A mechanical attachment for a golf club is disclosed in the prior art patent to Kenney, 1,759,622, issued May 20, 1930. This device "which comprises a resilient clip for holding a golf ball to the club head face depends upon the instantaneous visual observation of that portion of the swing when the golf ball leaves the clip, which obviously is extremely difficult. It further requires the presence of an observer in addition to the player, and also its use is limited to outdoors since it cannot be used for indoor practice or in small areas, due to the possibility of breakage.

Accordingly, it is a general object of this invention to provide a golf club attachment which eliminates the difficulties inherent in the prior art training devices.

More particularly, it is an object of this invention to provide an improved golf swing training device adapted to be attached to a golf club for determining the form and speed of the golf club swing during its backswing, downswing and follow-through.

These and other objects are realized in accordance with the features of the invention which takes the form of a combined mechanical and magnetic attachment for the head of a golf club. In one illustrative embodiment, the invention comprises a resilient clip or retainer spring which is adapted to be snugly clamped in a fixed position to the golf club head. A magnetic flux transfer bar is rotatingly mounted on the retainer spring so as to abut the face of the club head when the retainer spring is in operative position. While the magnetic flux transfer bar is urged against the club head face by the spring action of the resilient retainer spring, it is rotatable with respect thereto for reasons explained in greater detail hereinbelow.

Advantageously, magnetic pendant means such as a magnet mounted within a suitable case is attached to the retainer spring and transfer bar assembly as by means of a suitable length of cord or chain of non-magnetic material. A suitable opening is provided in the magnet case so that the magnet will be attracted to the face of the club head and adhere thereto in a manner which enables a golfer to determine the proper form and speed of his golf swing.

Thus, swinging of the club will cause the magnetic pendant to either stay stationary on the face of the club, move down the face of the club, move outwardly toward the toe of the club, or leave the face of the club entirely. This movement of the magnetic pendant is directly dependent upon the loft of the club used, the speed ice of the club swing and the position or squareness of the club face during the swing. As a result, the invention advantageously serves to determine and indicate the characteristics of the swing to the golfer to the end that the golfer can greatly improve his game.

An additional feature of one embodiment of the invention comprises dial means cooperatively associated with the magnetic flux transfer bar for rotation therewith relative to the retainer spring. Advantageously, the dial is calibrated with suitable yardage indicia representative of the distance a golf ball may be driven by the club. Since the position of the yardage indicating dial determines the angle of the magnetic fiux transfer bar on the club face, it also will determine the amount of centrifugal force required to be created by the speed and arc of the club head when the latter is swung. Thus, the golfer can set the dial for the desired yardage and practice taking swings until he determines the swing speed and path necessary to drive a golf ball the desired amount as indicated by the magnetic pendant leaving the transfer bar.

It further is contemplated as a feature of this invention that the circumferential edge of the pendant be formed with one or more plane surfaces of different angular extents. As the plane surface of the pendant in contact With the transfer bar is increased, the amount of club head speed and centrifugal force required to move the pendant is increased. Therefore, the yardage range of the dial is increased in a corresponding manner to extend the utility of the invention.

' In accordance with the features of another illustrative embodiment of this invention, the golf swing training device is provided with audio means to facilitate the detection of the time during the swing when the magnetic pendant means is dislodged from the magnetic flux transfer bar. Advantageously, the audio embodiment may take the form of a device which is adapted to be secured to the golf club head by means of the resilient clip described above or by means of a bar magnet mounted in a case to which a magnetic flux transfer bar is attached.

A clicker spring is provided and is of the type advantageously having a dished portion so that the clicker spring may be placed in either of two positions, the movement from one position to the other being accompanied by a distinct audible clicking sound. In the use of the audio embodiment, the clicker spring is depressed into one position, by means of a suitable cocking button, and is held in this position by the locking action of a retainer spring. The retainer spring is attached to the magnetic pendant, by means of a suitable non-magnetic cord or chain, and when the pendant is dislodged fromf. the transfer bar by the forces created during the swing, the pendant pulls the retainer spring to release the clicker spring and permit the latter to return to its uncocked position. This return movement of the clicker spring results in an audible clicking sound which occurs at the time the magnetic pendant is dislodged, and therefore, helps the golfer to ascertain the particular time during his swing when this action takes place to facilitate the correction of his mistakes.

Therefore, it is a further object of this invention to provide a magnetic pendant and transfer bar attachment for a golf club which serves to indicate the characteristics of a golfers swing and thereby enable the improvement of same.

It is still a further object of this invention to provide a magnetic pendant and transfer bar attachment, as above, further including selectively adjustable dial means for determining the swing characteristics required for driving a golf ball a desired distance.

It is still another object of this invention to provide a new and improved golf swing training device adapted to be attached to a club head and having audio means for indicating characteristics of the golf swing.

it is a still further object of this invention to provide a unique golf swing training device, as above, having a magnetic pendant positioned on the club head face so as to be responsive to the club swing, and further having audio means to provide an audible indication of the time during the swing when the magnetic pendant is dislodged from its original position. a a

it is anotoher object of this invention to provide a novel golf club attachment as above, which is characterized by its compact size and light weight, its economy of manufacture, and its highly useful functions.

The novel features which are characteristic of the invention are set forth with particularity in the appended claims The invention itself, however, both as to its "construction and me d of operation, together with further objects and advantages thereof, will best be understood by reference to the following description taken in conjunction with the accompanying drawings in which: FIGURE 1 is a perspective view of the attachment in- .vention in operative position in the head of the golf club;

FEGURE 2'is a cross-sectional view taken substantially as shown along line 2--2 of FIGURE 1;

'FlGURE 3 is a side elevational view of the invention particularly illustrating the yardage dial and the planar edge embodiment of the magnetic pendant;

FIGURE 4 is a side elevational view, partly broken, showing the magnetic pendant with a planar edge of different angular extent operatively positioned adjacent the magnetic flux transfer bar of the invention;

FIGURE 5 is a perspective view showing the construction of one preferred embodiment of magnetic flux transfer bar;

FIGURE 6 is a perspective view showing an illustrative audio embodiment of the invention in position on .the club head face;

FEGURE 7 is a view of the audio embodiment of FIGURE 6, with the outer case removed, to better illustrate the construction and arrangement of its component parts; and

: FIGURE 8 is a cross-sectional view taken substantially .as shown on lines 8-3 of FEGURE 6. 7

Referring now to the drawing, and more particularly to FlG-URESl and 2 thereof, there is shown one pre- 7 .ferred illustrative embodiment of the invention in operativeposition upon the head of the golf club. A shown, the invention comprises a compact and lightweight magneticattachment loll which is adapted to be positioned upon the head 12 of the golf club 14. In this particular embodiment, the invention comprises a retaining member which may advantageously take the form of the resilient spring clip 16. A magnetic flux transfer bar 18, comprised of a base arm 2% and a flange arm 22, advantageously is positioned adjacent one end of the retaining member 35, said retaining members 16. and said transfer bar 18 being aligned by means of the projection post 24 secured to the base arm 2% of the transfer bar 18, and extending through a suitable opening in the end of the retaining member 16.

Thus, it can be seen that the retaining member 16 is clamped to the club headlZ by being positioned over the top edge thereof such that the resilient action of the retaining member 16 serves to firmly hold the retaining member and the transfer bar 13 to the club head. It is contemplated that the retaining member 16 will be formed to fit the design on the back face 26 of the club head 12 so that it remains in fixed position thereon even during swinging of the club 14. The front end of the retaining member 16 serves to bias or urge the base arm 2d: of the transfer bar is against the front face 228 of the club head 22 so as to maintainthe transfer bar 18 firmly against the club head while at the same time permitting the transfer bar 18 to be rotatably adjusted on the front face 28 of the club head relative to the retaining member 16.

A magnetic pendant 3t? isloosely connected to the projection post 24, by means of any suitable non-magnetic link, as for example, a nylon cord or the brass chain 32. The brass chain 32 is fastened at one end thereof to a projection post 2d and at the other end thereof to a projection post 34 secured to the pendant 3i Advantageously, the length of the chain 32 should be suflicient to permit the pendant 3G to be adjacent the transfer bar 13, .to move downwardly or outwardly from the transfer bar 13, or to leave the front face of the club head 12.

In one pre erred embodiment, the magnetic pendant 33 comprises a cup-shaped case 36, of steel or the like, having an opening within which is positioned a suitable magnet 38. r The operation of the invention will now be described. It will be appreciated by those skilled in the art that the magnetic attachment it may be adapted to fit on golf club heads ranging in loft from a No. 1 iron to a pitching wedge. Further, it is adapted to be used with the same degree of precision whether used by a male or by a female golfer. As will be appreciated from the following description, the difierences in physical strength between golfers is compensated by the difference in the loft of the club face of the club with which each golfer practices and establishes his ability.

The magnetic pendant 3t either stays substantially in its original position upon the face of the club, moves outwardly toward the toeof the club, or leaves the face of the club entirely, depending upon the particular characteristic of the golf swing being determined.

. The speed of the backswing is determined by the weight of the golf club head 12, the flexibility of the shaft of the club 14, and the strength of the golfer. In the use of the invention, a golfer may determine the proper backswing speed by first placing the invention on one of his clubs having the least amount of loftas for example, a No. 2 iron. The magnetic pendant 3d is placed in the center of the club face 23 but not in contact with the magnetic flux transfer bar 13. The golfer executes 2. normal backswing, stopping at the top of the swing. The golf club is then brought down slowly and the magnetic pendant 39 is checked for movement from its original position. If the magnetic pendant 3% has moved from its original position in the center of the club face 28, the invention is removed from the iron and placed upon the next higher loft club and again a full backswing is taken. This procedure is repeated until the golfer determines the club which enables him to take a full, comfortable backswing without movement of the magnetic pendant 3%.

Should the golfer discover that the pendant 36 will move when taking a backswing with a particular iron, but that it will not move with the next higher number iron, then he has established by what degree of club loft his bacltswing is too fast, since for example, movement of the pendant on a No. 2 iron, but not a No. 3 iron, indi cates the proper speed. To perfect a smooth and rhythmic bacltswing, the golfer then places the invention on his No. 3 iron and practices by slowing down his baclcswing until he can move the club head from the position of address to the top of the backswing without. disturbing the magnetic pendant 36 from its placement on the face 28 of the club.

The golfer, having ascertained the proper speed of rhythmic baclcswing, can now determine the squareness of the club face in relationship to the ball during the backswing. To check this, the golfer places the attachmeat 10 onrhis No. 2 iron and places the pendant 39 in the center of the club face 28 but not in contact with the transfer bar 18. The golfer then takes a smooth rhythmic backswing such as he perfected while practicing a backswing speed with his No. 3 iron. By stopping at the top of the backswing and bringing the club down very slowlyso as not to disturb the pendant ill from the position to which it had moved during the backswingthe golfer may then determine what the squareness of the club face has been in relation to the ball during the backward movement of the club.

If the pendant 30 has moved downward and outward towards the toe 40 of the club face in such a manner that the chain 32 forms a parallel line with the club shaft, the relationship of squareness between the club face and the ball is proper. Any degree of variation in parallelism between the chain 32 and the club shaft is caused by error in the backswing.

When practicing to determine maximum club head speed, the golfer places the attachment 18 on a club having the least amount of loft. The pendant 3% is placed on the face 28 of the club head in contact with the transfer bar 18 and the golfer takes a full swing. If the pendant 38 moves downward away from the transfer bar 18, the golfer should change to the next higher lofted club and the swing repeated. If the pendant still moves away from the ball during the swing, the loft of the club is continu ously increased until the golfer finds that the pendant fails to come away from the transfer bar after a full swing has been taken.

In accordance with one unique embodiment of the invention, a dial 42 is provided with yardage indicia calibrated thereon. The dial 42 is formed with a keyed aperture 44 adapted to fit over the projection post 2-4 so that rotation of the dial 42 causes the transfer bar 18 to be rotated in a similar manner with respect to the retaining member 16. Advantageously, an indicating arrow 46 is marked on the retaining member 16 to facilitate the selective adjustment of the calibrated indicia on the dial 42.

Those skilled in the art will appreciate that the angle of the transfer bar 18 relative to the retaining member 16 and club head 12 will determine the amount of centrifugal force necessary to cause the pendant 30 to be moved out of engagement with the transfer bar 22. Thus, changing of the position of the dial 42 to indicate more or less yardage, as shown by the indicia and the arrow 46, changes the angle of the fiux transfer bar 18 such that any increase in said angle requires a greater amount of centrifugal force to move the magnetic pendant 30 away from the transfer bar 18. The yardage calibrations on the face of the dial 42 correspond with the degree of angle of the magnetic flux transfer bar 18, which, in turn, is calibrated in its position to the face and shaft of the club 14 and to the degree and directional pull of the centrifugal force created by the speed and are of the club when swung.

It now will be appreciated that it is merely necessary for the golfer to adjust the angle of the flux transfer bar 18 to the desired yardage indicated on the dial 42, and when the golfer swings the club with sufiicient force to cause the magnetic pendant 38 to leave the transfer bar 18, he has determined the amount of force necessary to drive a golf ball the indicated distance.

In accordance with a further feature of this invention, the circumferential edge of the magnetic pendant 39 may be provided with plane surfaces of different angular extent. This is illustrated in FIGURES 3 and 4 wherein the magnetic pendant 30 is provided with a plane edge surface 48 and with a plane edge surface 50, the latter plane edge surface being shown as approximately twice the angular extent of the plane surface 48.

It will be appreciated by those skilled in the art that the degree of plane edge surface with which the pendant 38 is in contact with the magnetic flux transfer bar 18 governs the movement of the pendant 38 and determines the amount of additional centrifugal force required to move the latter from the transfer bar.

Where, as described above, the pendant 38 is placed with an arcuate surface against the transfer bar 18, a point contact exists therebetween and a given amount of centrifugal force as determined by the angle of the transfer bar 18 will be required to dislodge the pendant 38 from the transfer bar. If, instead of a point contact, the plane edge surface 48 is in engagement with the trans-fer bar 18, a greater amount of centrifugal force will be required to move the pendant 3t) and as shown in the illustrative embodiment of FIGURE 4, this greater amount of centrifugal force will indicate an additional fifty yards to the drive of the golf ball. If a plane edge surface of greater angular extent, such as the plane edge surface 50, is engaged with the transfer bar 18, a still greater amount of centrifugai force will be required to dislodge the magnetic pendant fit} from the transfer bar 18. Since the plane edge surface 58 has twice the angular extent of the plane edge surface 48, this indicates that a distance of 100 yards in addition tothe yardage calibrated on dial 4-2 adjacent the arrow 46 will be achieved when the club swing provides sufiicien-t centrifugal force to dislodge the pendant 3t) from the transfer bar 18. Thus, it is manifest that the larger the plane angle of the magnetic pendant 30 in contact with the transfer bar 18, the greater will be the amount of club head speed and centrifugal force required to dislodge the pendant 30 from the transfer bar.

The golfer may check his follow-through at the end of the golf swing in the following manner. If, at the end of the follow-through, when the golf shaft is horizontal to the ground, the magnetic pendant 3i) has moved downward and outward toward the toe 4-4 of the club face, and has come to rest in such a position that the chain 32 forms a parallel line with the shaft of the club, the followthrough has been smooth and rhythmic. As the pendant leaves the face of the club at the end of a follow-through, maxi-mum club head speed has been maintained through the swing. If the pendant 38 leaves the face of the club head at any time during the swing, except at the finish thereof, when the shaft of the club is horizontal to the ground, the follow-through is incorrect. if the latter condition continues to exist, it may be that the rhythmic swing has met with interference caused by a braking action of the hands and arms or :by some other counteraction of the body.

Another illustrative embodiment of the invention is shown in FIGURES 6, 7, and 8 of the drawing. As explained hereinabove, the relative movement of the magnetic pendant with respect to the magnetic flux transfer bair during the swing of the golf club serves to indicate the characteristics of the golfers swing and enables the golfer to note and correct any mistakes which he may be making during the swing. Those skilled in the art will appreciate that it may be helpful to the golfer to determine at what point the magnetic pendant is dislodged from the magnetic flux transfer bar, should this latter condition occur during the swing. In accordance with a unique feature of this invention, audio detection means are provided with the training device to audibly indicate to the golfer when the pendant is dislodged from the flux transfer bar during the swing,

Advantageously; this highly desirable result may be provided with the illustrative embodiment of the invention shown in FIGURES 6 through 8 of the drawing, As there shown, the training device 6t) comprises an outer case 62 made of a non-magnetic material, such as plastic, which is fastened to a metallic member 72. as by means of the rivets 92 or the like. As particularly shown in FIGURES 7 and 8 of the drawing, the metallic member 72 is generally formed of an elongated U-shaped housing having an angular flange 74 extending from one leg thereof and a magnetic flux transfer bar '70 extending from the other leg thereof. Preferably, a block of mag netic material is positioned in the enclosure defined by the legs of the metallic member to enable the latter to be firmly positioned against the front face 49 of a club head 12. In one particular embodiment of the invention, the block of magnetic material 88* is comprised f 7 a resilient magnetic material, such as barium ferrite in a rubber base, commercially known as Piastifoarn. However, it will be readily appreciated by those skilled in the art that other types of metallic material may be used for the block 98.

it can be seen that the magnetic block 9% within the metallic member 72 together with the angular flange 7 serves to properly position the invention on the front face of the golf club head. By reason of the angular position of the flange '74, the invention serves to accommodate various types of club heads of diiferent depths to provide greater utility and flexibility for the invention. When, as shown in FIGURE 8, this embodiment of the invention is operatively positioned upon the club head 12, the magnetic block ll is magnetically held against the face of the club head with the magnetic flux transfer bar '76" in position to receive the magnetic pendant 3i As a further feature of this invention, a shaped retainer spring 96 is secured to the metallic member 72, as by means of the rivet 166', or by any other suitable fastener means. The retainer spring 95 comprises a resilient lock portion 9% extending between the main body of the metallic member YZ and the magnetic flux transfer bar '79. The metallic member 72 also is attached to the pressure member 94 which extends upwardly into the plastic case 62 from one leg of the metallic member 72 for operation as explained with greater detail below.

A clicker spring '82, advantageously formed of an elon'- gated resilient leaf spring member, is secured at one end thereof to the plastic case 52 so as to be freely movable at its other end which is operatively associated with the lock portion 98 of the retainer spring. Advantageously, the lock portion 98 of the retainer spring may be provided with a concave groove to receive the free end of the clicker spring 82 when the latter is placed in operative position.

The clicker spring 32 also is provided with a dished portion '84 which is adjacent the pressure member 94 of the retainer spring. As shown in FIGURES 7 and 8, the fixed end of the clicker spring '82 may be provided with suitable slots 36 which mate with the outstanding ribs 88 formed in the plastic case 62; to insure a secure fastening of the clicker spring to the case.

The plastic case 6G is formed with a hub 64 having a circular opening therein through which a set pin 66 is inserted. To prevent the set pin 66 from being removed from the case 6%, advantageously, the inner end of set pin 66 is provided with a suitable enlarged head or flange 80. In the operation of the invention, the device is positioned on the face of the club head 12 and is securely held thereon by the magnetic action of the block Qfr and the angular flange '74-.

The set pin 66 is depressed such that the head 89 moves the freely movable end of the clicker spring 82 inwardly where it is h ld in cocked position by the groove of the lock portion 98 of the retainer spring 95. At this time, the pressure member he places reverse pressure on the dished portion 84 of the clicker spring to facilitate the cocking of the latter.

The magnetic pendant 38' is linked to the lock member 98 of the retainer spring by means of the nonrnagnetic cord or chain 32. When the magnetic pendant 3% is positioned in engagement with the magnetic flux transfer bar 70, as shown in FIGURES 6 and 8, the clicker spring 82 will remain in its cocked position.

If, during the swing of the golf club, the magnetic pendant is thrown outwardly from the magnetic flux transfer bar in the manner described above, this outward movementwill pull the lock member 93 of the retainer spring outwardly to release the clicker spring. At this time, the clicker spring'will produce an audible clicking sound due to its return to its original position, as shown in dotted lines 32a in FIGURE 8. It can now be appreciated that the release of the clicker spring by the action of the magnetic pendant becoming dislodged from the flux transfer bar and being thrown outwardly, provides an audible click which tells the golfer at what point during his swing this condition takes place. Accordingly, the clicking signal is made available to aid the golfer in determining his faults during the golf swing. This audible information is in addition to the information derived from the position of the magnetic pendant in the manner described hereinabove.

Manifestly, for the next training swing, the clicker spring 82 may be recocked by merely depressing the set pin as to depress the end of the clicker spring to be held in cocked position by the lock portion of the retainer spring.

While there has been shown and described a specific embodiment of the present invention, it will of course, be understood that various modifications and alternative constructions may be made without departing from the true spirit and scope of the invention. Therefore, it is intended by the appended claims to cover all such modifications and alternative constructions as fall within their true spirit and scope.

What is claimed as the invention is:

l. The improvement of a training attachment for a golf club comprising a retaining member adapted to be positioned on the head of a golf club, a magnetic flux transfer oar secured to said retaining member for engagement with the face of the club head when the retaining member is operatively positioned on the club head, a magnetic pendant comprising a case formed with an opening therein and a magnet positioned in said Opening, said magnet being adapted to be magnetically secured to the face of said club head, and non-magnetic linking means connected between said transfer bar and said magnetic pendant.

2. The improvement of a training attachment for a golf club comprising a resilient retaining member adapted to be positioned on the head of a golf club, a magnetic flux transfer bar secured to said resilient retaining memher for engagement with the face of the club head when the retaining member is operatively positioned on the club head, a magnetic pendant comprising a case formed with an opening therein and a magnet positioned in said opening, said magnet being adapted to be magnetically secured to the face of said club head, and non-magnetic linking means connected between said transfer bar and said magnetic pendant.

3. The improvement of a training attachment for a golf club in accordance with claim 2 further comprising dial means secured to said transfer bar for rotation therewith, said dial means being calibrated with indicia indicative of the force necessary to cause said pendant to be dislodged from said transfer bar for each angular position of said transfer bar relative to said club face.

4. The improvement of a training attachment for a golf club comprising a magnetic flux transfer bar adapted to be positioned onthe face of a golf club head, and a magnetic pendant comprising a case having a magnet secured thereto, said magnet being adapted to be magnetically attracted to the face of said club head and to said magnetic flux transfer bar, the movement of the magnetic pendant relative to said golf clue face during each golf swing being indicative of the characteristics of said golf, swing, and dial means secured to said magnetic flux transfer bar for rotation therewith, said dial means being calibrated with indicia representative of the force necessary to cause said pendant to be dislodged frfom said transfer bar at selected angular positions there- 0 5. The improvement of a training attachment for a golf club in accordance with claim 4 wherein said magnetic pendant case is formed with plane peripheral surface portions of difiercnt angular extent, each of said plane peripheral surface portions when positioned adjacent said magnetic flux transfer bar serving to require a predetermined force in addition to that represented by said dial indicia to dislodge said magnetic pendant from said transfer bar.

6. The improvement of a training attachment for a golf club comprising a retaining member adapted to be positioned on the head of a golf club, a magnetic flux transfer bar secured to said retaining member for engagement with the face of the club head when the retaining member is operatively positioned on the club head, a magnetic pendant comprising a case formed with an opening therein and a magnet positioned in said opening, said magnet being adapted to be magnetically at tracted to the face of said club head and to said magnetic flux transfer bar, and audio means responsive to the movement of said magnetic pendant on the golf club head during the swing of the golf club to produce an audible indication to indicate said movement to the golfer at the time during the golf swing when said movement occurs.

7. The improvement of a training attachment for a golf club in accordance with claim 6 wherein said audio means comprises a clicker spring freely movable at one end thereof for clicking movement from one position to another.

8. The improvement of a training attachment for a golf club in accordance with claim 7 further comprising a lock member secured to said retaining member, manually actuatable means for setting said clicker spring in said one position to be held by said lock member, and means linking said magnetic pendant to said lock memher whereby movement of said magnetic pendant releases 30 9. The improvement of a timing attachment for a golf club comprising a magnetic retaining member adapted to be positioned on the head of a golf club, said magnetic retaining member comprising an angular flange adapted to receive club heads of various dimensions, a magnetic flux transfer bar secured to said retaining member for engagement with the face of the club head When the retaining member is operatively positioned on the club head, a case of non-magnetic material enclosing said retaining member, resilient audio means mounted within said case with one end fixed to said case and the other end freely movable within said case, a lock member within said case, manually actuatable means to cause the freely movable end of said audio means to be retained by said lock member, a magnetic pendant comprising a case formed with an opening therein and a magnet positioned in said opening, said magnet being adapted to be magnetically attracted to the face of said club head, and to said magnetic flux transfer bar, and non-magnetic linking means connected between said lock member and said magnetic pendant such that movement of said magnetic pendant during the golf club swing actuates said lock member to enable release of said audio means therefrom with an audible sound to indicate to the golfer the time during said swing when movement of the magnetic pendant takes place.

Smith Oct. 6, 1942 Lewis Oct. 27, 1959

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2297806 *Apr 14, 1941Oct 6, 1942Paul J SmithMagnetic holder for pencils or the like
US2909868 *Mar 28, 1958Oct 27, 1959Lewis Clarence WAnimated toy
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5348522 *Dec 4, 1992Sep 20, 1994Brotman Eric MAuxiliary magnetic weights and method of using same
Classifications
U.S. Classification473/233, D21/759, 116/284, 446/404, 73/514.39, 446/129
International ClassificationA63B69/36
Cooperative ClassificationA63B69/3632
European ClassificationA63B69/36D2