Title:
Practice golf club
United States Patent 2388463


Abstract:
This invention relates to practice golf clubs of the type wherein movable weights are employed to produce shocks and sounds, and more particularly to a novel practice club wherein special advantages are derived from a movable weight at t the lower end Portion of the club. Prior to this invention,...



Inventors:
Benecke, Louis A.
Application Number:
US47227643A
Publication Date:
11/06/1945
Filing Date:
01/13/1943
Assignee:
Benecke, Louis A.
Primary Class:
Other Classes:
434/252
International Classes:
A63B15/00
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Description:

This invention relates to practice golf clubs of the type wherein movable weights are employed to produce shocks and sounds, and more particularly to a novel practice club wherein special advantages are derived from a movable weight at t the lower end Portion of the club.

Prior to this invention, the shafts of practice golf clubs have been loaded with movable weights designed to move and produce audible sounds and shocks in response to proper strokes of the clubs. l( These old theories arise from a fundamental idea of producing an audible noise to indicate a proper stroke, at the same time displacing an abnormal load in the club.

However, in actual use of a golf club, objections 1 appear in a displacement of the weight of any part of the club. Any noise occurring during the stroke of a club is a'very disturbing factor, and if such noise is accompanied by a shock due to a hammer blow in the practice club, the 2C novice will be faced with highly disturbing conditions quite remote from his normal future use of a regular golf club.

In using an ordinary golf club, an expert player will carefully consider details involved in the 28 weight at various parts of his club, and assuming that there will be no disturbance of the weight, and no noise, or no shocks at his hands, the expert will carefully prepare for his predetermined stroke. Any disturbance of the expected weight, or any noise, or any shock at the hands of the player, will interfere with his predetermined stroke.

Bearing in mind that the object of any practice golf is to educate the novice for actual conditions he will find in using a regular golf club, it appears that the old practice clubs involving a deliberate disturbance in the weight of the club, as well as audible sounds and shocks at the hands of the player, for the purpose of indicating proper strokes, are highly disturbing factors, quite remote from the conditions in normal use of a golf club. Obviously, practice wherein these disturbing conditions are intended to indicate a proper swing of the club, is extremely remote from conditions to be found in actual use of a regular golf club.

Therefore, an object of the present invention is to produce a practice golf club which overcomes one or all of these undesirable conditions. More specifically stated, an object is to overcome objections due shifting weights, audible sounds, or shocks at the hands of the player when proper swings are made with a practice golf club.

Such conditions do not teach the user how to make proper strokes in the normal use of a regular golf club, wherein each of said conditions would be an unexpected disturbing factor. In other words, these old practice golf clubs educate the i pupil for conditions radically different from the conditions he will find in actual use of regular clubs, and my object is to overcome defects in these old teachings.

Study of this very old problem has led to a o development of the present invention wherein the improved practice golf club has an educational value deliberately created to immediately prepare the user for conditions he will find in actual use of regular clubs.

SWith the foregoing and other objects in view, the invention comprises the novel construction and arrangement of details herein shown and described to illustrate one form of the invention.

However, it is to be understood that the scope m of the patent extends to variations and modifications within the scope of the terms employed in claims hereunto appended.

Fig. 1 is a side view of a practice golf club embodying features of the present invention.

Fig. 2 is a section on the line 2-2 in Fig. 1, drawn to a larger scale, and s howing a head slidable on the lower end portion of the shaft.

Fig. 3 is a bottom view of the head and shaft shown in Fig. 2.

To illustrate one form of the invention, I have shown a practice golf club having a shaft 4 provided with a handle 5 at its upper end, and a head 6 at its lower end. The head 6 is slidable on the lower-end portion of the shaft, and while said head may be of any desired shape, it is preferably in the form of a ball or roller, free to rotate around the axis of the shaft 4.

Without limiting the invention to specific details shown in the drawing, I will refer to Figures 2 and 3 wherein the head 6 is in the form of a ball having a bore 7 slidably fitted to the shaft 4, and a larger bore 8 to receive a sleeve 9. This sleeve is slidable on the lower end of shaft 4, and it may be secured to the head 6 in any suitable manner. For example, connecting screws 10 may be interposed between said sleeve and head, as shown in Figures 2 and 3.

In this form of the invention, a stop collar II is fixed to the shaft 4, so as to limit displacement of the head 6 relative to the shaft 4. The collar II is confined between a stop shoulder 12 at the upper end of the bore 8 and a similar shoulder 13 at the upper end of the sleeve 9.

This stop collar II is shorter than the distance between the stop shoulders 12 and 13, so as to permit limited sliding displacement of the head 6 on the straight shaft 4 when the practice club is in service. Such displacement will result in audible clicking sounds when the stop shoulders 12 or 13 strike the stop collar I . Briefly stated, the head 6 is slidable on the lower end of the shaft 4 and free to rotate about the axis of said shaft. The siding movements may be due to gravity, or to centrifugal force.

Rotary :head- for .preliminary sstrokes This form of the invention in'cludeS 'a head" slidable on the lower extremity of the shaft, and free to rotate in contact with the ground duringinitial movements of the clutch. Free-rotation -15 of the head is a desirable condition, which prevents disturbance in the short back and forth-i preliminary strokes usually :made. to determine the direction of the swing.

The backswing 20 As a result bf centrifugal force'and gravity, the slidable head is movable limited distance's at the extremity of the shaft;'ard such movements will result in annoying clicks'in addition to sh6cks at' the-hAnds of the user: However;'in the preferred form ifof the" inveritito, -a proper backswing will catug thie head to remain "at' the iextremity of the shaft, so there will be no -disturbing noise or shock durinig a proper backswiffg. On-the other harid, if the backiswingis'too slow, the head will slide" toward -the haridl, thereby producing a sound and a shock to advise futthfr-practice for this part of the swing. It' will be observed that these disturbing conditions do nit occur during 3; a proper-backswing.The downswing Thie-slidable head' Q'is preferably designed to remain in'its- extreme position-'at the end of the 4 shaft during-a proper ddownswing; thereby avoiding any "objectionable ndise or shock when this part of the swing is properly made.The follow through It is usuallywrery difficlt to teach a :person to folilowithrough-with a -rapid" full-swing. Thenovice-is likely 'to''assume-that the' stroke shouldend when-theihead' hits- the ball, and one- of the outstanding old problems appears in- teaching 5 hitirntd deliberately continue' the movement at a high'velocity. The new' device tis preferably desigined'to- produce- a 'disturbing click -and -shock when th6 pupil fails to continue at the velocity required for- a 'full swing.- The centrifugal force of the-desiredd velocity will-retain, theý shoulder 12 in contact with1the- ollar 11, but a lower-velocity will allow the 'head -6 to' drop by gravity until its-shoulder 13 strikes th6-collar- II. Again we find that the noise and shock are deliberately employed to advise the pupil of his mistakes. Further practice will induce him to acquire a "follow through" velocity great enough to avoid the disturbing factors, and a swing of this kind, lacking the noise and shock, will conform approximately to the conditions expected in actual use of a regular golf club.

I claim: 1. In a practice golf club wherein audible clicksindicate 'improper practice strokes; a shaft provided with'a handle at one end, a hdad freely.slidable on the opposite end of said shaft, said freely slidable head being movable toward said hindle in'response to an improper upward swing of the practice golf club, and stop elements carried by said shaft and slidable head to limit the sliding--movements -said stop elements including a stop member carried by the head separated "from"blit arranged to strike a stop member on said-shaft so as-.to limit the sliding .movement of saidhead when the practice club, is in service.

2. :A.practice golf club having a straight shaft provided with a handle at one end, a head rotatable around ther.opposite .end of said straight shaft, said rotatable head being in the form of a ball freely slidable on: the shaft and movable toward the handle: in response. to an improper- upward:swing, of;the practice golf club, and sepa-Srated stop .elements -carried by said shaft and head to limit the sliding movements.

3. A ,practice golf club-having a straight shaft provided; with a handle at, one- end, a -head slidable on the opposite end of said shaft, and stop elements:carried'by said head to limit its sliding movementsi '.saidc stop : elements being located withiit the- head: and-the shaft being provided with - a, stop- colla located between and adapted to audibly engage:said stoP elements, said stop Scollar- beingshorter. than the' distance between said -stopoýelements- so ,as toa permit limited sliding- displacement; of.-the head when the club is in service.

4. ýAn edUiational:golftclub having.a shaft pro5 videdAwithi-a ,handl&at::one-,end:,- and a pair. of stop-elefents- fixed tow its loppositeýend :portion,said-fixedtstOP celetmentsiý being separated- from each othdraflh a .directioCparaUlel .with. the axis of -saidshaft -ta-oose- signalling-:device confined 0by saidi fixtd-top lementspisaid loosely..confined signallirig device'-hiviiga an -axis. approximatelyparallel -with :said-shaft andbbeing: treely.movablein response to the influence of centrifugal. force andi gravity fronion nofjsaigdfiXed.stop :elements Sto -the otliher,-sos as&6tdproduce aan audiblei signalt in' respdnset 6-an'iamproperLupward -swing of thBe educational-clubNEKE LOUIS.::AýBENECKEJ: