US1916791A - Golf club - Google Patents

Description

July 4, 1933.

w.v J. HADDEN GOLF CLUB lFiled Aug. 23, 1928 Patented 4, 1933 y isierras r 1 LAM JAMES HADDEN, 0F GLASGOW, SCOTLAND, ASSIlli'lN'QlEt T0 DONALDSON MANUFACTURING COMPANYLHITED, 0F GLASGQW, SC'ILANDV Gonr etnia Application lec August 23, 1928, Serial No.

rlhis invention relates to metallic shafted metal headed golf clubs, that is, golf clubs comprising a metallicy shaft and a metallic head.

rihe chief object of the present invention is to provide such a golf club in which the shaft and head can easily and quickly he detached, primarily for the purpose of allowing a prospective purchaser to try anun.- loer mi di'erent heads and shafts together in order to select the combination most suited to his or her physique and style of play, and also tor facilitating transport and storage.

Where heads and' shafts are to he attached and detached often, tor a satisfactory cluh itis desirahlc-i that (i) The shaft and head yWhen secured together he rigidlyand very securely joined so as to provide a club having ali the charac-` teristics oi those of the more usual type, in v which the head and shaft are permanently sen cured together, and so 'as to withstand the impacts to which it is subjected in use. (2) 'ilhe shaft and head he easily and quichly detachable. l

(3) Gontinuous attachment and detachnient oi head and shaft should not damage either oi those parts in any Way.

@ther objects oi the invention are to attain the desideratnm set iorth in (i) and shove.

A further object of the invention is to provide an iron geit cluh that is, a metalheaded cluh, having easiijv detachable head and shaft, and in which a metal to nietai joint is provided hetvreen the head and `shait `lor it is Weil irnorrn that a `Wood to metal goin-t hetvreen head and shaft is unsatisiacin use, particulleriy in a club of the present type with a detachable shaft for,

owing to the rotative softness oi -wood it very soon. tie-cornes @imaged or Worn and the joint loecornes loose.

fi stili further object oi? the invention is to provide a metallic :drafted iron goh? cinto, the head and shaft of which are easily7 quickly separable, and which can he very secureiy ioined togethenhut which wili not necessitate the use of additional parts, he

5@ sides the head and shaft, for securing thein iilustratethe forces to which the gott chilo 301,672, aus in creat einem my ia, 192e.,

together, and will therefore not spoil the balance of the head by increasing the'weight at the joint. e

A still further object of the invention is to provide an easily detachable and ecient no joint for steel shaftediron gott clubs which is of a simple nature, robust, and oom-` paratively inexpensive to manufacture..

A stili further object oi the invention is to provide a steel shafted iron golf club having an easily detachable but tightly securable head and shaft, in which the joint between head and shaft will not decrease in etiioiency over a long period oi use'o the club, and of separation'and attachment of head and shait Y A stiilurther object is to provide a steel shafted iron goti club having an easily separable hut tiv htiy securalole heed and shaft, which, un er conditions einem", ,and under inass production conditions entaiiing inaccuracies in manufacture, 'will always ensure a tight and satisfactory joint between head and shafts in order that the invention may he clearly understood, a practical embodiment thereof will now he described With reference to the accompanying drawing, Whereonz Fig, i is a sectional vievv ot the metailio4 shaft tor iron goti' cluhsn Fig. 2 is a sectionai view showing the shaft secured inthe head, and

3 and i are, respectiveiy, elevation and pian oi the clulo striking; the haii, and.

is suhjeemd in use. p

in Figs. i and Et ot the drawing, the nu merel i denotes the tuhuiar ta aering metallic shaft, While nuinerai Q', denotes the forged steei head. is shown, the head termed in it e sochet, the outer 3 of which is hit-srn neiiy tap-ered, and innerpart ont 'which is internaiig7 screw;7 threaded., The shat il taw pered and is the counterpart ot the internaln l; tapered part 3. The taper entends up to @5 the point inarlred 5, e short distance troni its end, and the remainder 8 is made paraiiel sided or cyiindrical and in the form ont a. screw, so as to screw into the corresponding '6 is formed by suitably bending or shaping the metal by means ofldies or otherwise.

When the shaft is screwed into the head, the tapering parts 1 and 3 are brought into 5 inter-engagement, and, as the two contacting faces are of metal and are rigid, they bind frictionally very tightly together, in similar manner'to that in which a glass stopper grips the neck of a glass bottle. Owing to the fact that the joint is metal to metal, the shaft and head can be joined and separateda great number of times without causing damage or impairing the joint in any way. The construction forms an exceedingly simple joint, which is very easy to join and separate, no additional parts being necessary, and therefore the delicate balance of the club at the head is unaffected, as would be the case if ferrules, plugs or sleeves were '20 used. The use of the usual cross-pin is not even required. When it is desired to change the head or shaft, the shaft can be withdrawn readily by placing the head between the players feet and screwing back the shaft. 'T95 It is important that the inter-engaging tapared parts of the shaft and 'socket should be so proportioned that they are drawn very tightly together before the screwed part is screwed to its limit into 'the socket, and before the lower end of the tapered part of the shaft can come against the upper end of the threaded part of the socket, and also so that these do not give or wear with use so as to be relatively variable in diameter, as would be the case with a wooden part. To ensure the interengagement of the tapared parts in this way, the diameter of the shaft is usually made just too great to permit engagement with the ta ered part of the m socket the entire distance from top to bottom thereof. The result is that the l'ower end of the shaft stops short of the lower end of the socket, and the lower end of the shaft taper stops short of the upper end of the socket screw threads when screwed fully home. lf, therefore, say, the shaft is made slightly too small, the clearances thus formed will ensure inter-engagement.

Referring now to Figs. -3 and 4, when the club strikes the ball 7 with an im act denoted by A, two forces act on the clu namely, a maximum bending movement A y, where y is the distance from the centre or .gravity of the ball to the point on the shaft which bends most, and a torsion couple A at a given point, where is the horizontal distance from the centre of gravity of the ball to the given point on the shaft. 60 It will therefore be evidentLthat to get the best results out of the club, the shaft must be of material thin enough to bend and twist as required by the impact, so as to store energy, in .order that, during the follow 66 through of the club the shaft will give the the shaft is v kick inherent in goed' golf chbs. The

method of screw threading the lower end of the shaft itself in accordance with this invention therefore enables av detachable joint to beobtained without impairing the resiliency of the shaft in any way, without weakening the shaft by cutting a thread thereon,

and Without spoiling the balance of the club by using additional parts or by reinforcing the shaft, as for instance, by casting a sleeve -thereon and threading the sleeve.

The golf club illustrated is for a right hand player, and the parts and 6 have lefthended threads, so that, when the club strikes the ball or the ground, the aforesaid torsion couple tends to tighten the joint by screwing the shaft further into the head. 'For a lefthanded player the'threads would be righthanded.

lt will be noted that the surface area of the inter-engaging tapered parts is considerably greater than the area of the interengaging threaded parts, and this proportion may even be increased over that shown, because the threaded part mainly serves to draw the tapered parts into inter-engagement and retainthem there, the most important part of the joint being that at the tapered parte. The joint 'formed may therefore be termed a combined screw and push joint, the push joint being that formed between the tapering parts of shaft and head, in the manner described,

lt is to be understood that the invention is applicable to all kinds of iron heads fitted with metallic shafts.

l. A two piece golf club comprising in combination a metallic head and a tubular tapering metallic shaft which are quickly and easily detachable, or securable together withI a metal to metal joint, said head having a socket withA an inner cylindrical screw threaded part at the lower end thereof and an internal plain tapering part at the upper end thereof tapered to correspond with the shaft, of comparatively vslight taper and merging into said screw threaded part, and said shaft having a cylindrical screw threaded part at the smaller end thereof corresponding in size to the internal threaded part on the socket, the screw bein formed on the 'shaft by bending the meta of the shaft itself into screw formation'without thickening, reinforcing, or cutting. the metal, the smallest diameter of the tapering part of the shaft being slightly greater than that which allows engagement of the tapering parts of the shaft and socket over the whole length of the tapering part of the socket, said parts being proportioned to leave a clearance in the socket below the lower end of the shaft and the bottom of the socket.

2.. A metal headed golf club comprising 'two separate elements only, namely, a metaljoining the small end of said tapered portion and having screw threads impressed 1ntegrally into the metal thereof, a metallic head provided with a socket extending only of said shaft, the screw threaded cylindrical' portion of said shaft being ot such length that when the tapered portion of said shaft has penetrated the maximum distance into said socket there is a clearance between the extremity of said shaft and the extremity of said socket.

8. ln a two-piecei metal headed golf club, a tubular metallic shaft comprising a tapered portion and e cylindrical portion, said cyiindrical portion terminating said shaft and edjoining the small end of seid tapered portion and haring screw threads impressed integrally into the metal thereof, a ineteilic heed provided with a socket extending oniy part oi" the way through seid heed and seid socket having an outer tapered portion Whose meximuni diameter is outside end having an inner cylindrical portion contiguous to inner end of said tapered portion, the cylindrical portion o1 said socket heing screw threeded for receiving the screw threaded portion of said shaft, and the slope of the tapering ortion of said socket corres ending to the s ope of the tapering portion o said shaft, the minimum diameter of the tapered portion of said shaft being slightly greater than the inner diameter of the screw threaded portion of said socket, whereby the tapered portion o said shaft can not engage the threaded portion of seid socket, and the screw threaded cylindrical portion of said shaft losing of such length that the extremity of said sha-ft can not penetrate to touch the inner extremity of said socket.

9. in s. golf club, a shaft tapered towards its lower end and terminating in a cylindrical shank 'formed integral with the tapered portion and havinr threads of no greater diameter than the Tower end of the tapered portion, and e head having a noch formed with socket opening through its upper end, said socket being tapered downwardly to the saine degree as .the tapered portion of the shaft end having threaded lower portion of uniform diameter, said shaft having its threaded portion screwed into the threaded portion o' the socket with its lower end spaced from the bottom ot the soci-iet end the tapered portion o?? the shaft tightly wedged into the tapered portion of the socket 'to insure rrh wedging connection between the shaft and head.

testimony whereof l eiii:

WILLAM JMES my signature.

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