US2275568A

US2275568A - Golf practice apparatus

Info

Publication number: US2275568A
Application number: US336389A
Authority: US
Inventors: Smith Arthur
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-21
Filing date: 1940-05-21
Publication date: 1942-03-10
Anticipated expiration: 1959-03-10

Description

March 10, 1942.

A. SMITH GOLF PRACTICE APPARATUS 2 Sheets-Sheet l Filed May 21, 1940 Anya.'

March 1o, 1942. A. SMITH 2,275,568

GOLF PRACTICE APPARATUS Filed May 21, 1940 2 sheets-sheet 2 Invenror Arthur Smith byfawww Patented Mar. 10, 1942 UNITED STATES PAT-ENT OFFICE GoLF PRACTICE APPARATUS Arthur Smith, Dedham, Mass. ApplicationMay 21, 1940, serial No. 336,389 y 1 Claim.

This invention relates to a golf practice apparatus of that known type which comprises a horizontal rotatable shaft carrying one ormore radially extending arms, each having a ball shaped end that simulates a golf ball and is adapted to be struck with the golf club of the golfer in a manner similar to that in which a regular golf ball is struck when playing golf.

The shaft is carried in a suitable supporting frame, and one object of the invention is to provide said frame with an upper surface which will yield somewhat if the golfer accidently strikes it, thus simulating very closely the reaction a golfer experiences if he strikes the turf on a golf course when swinging at the ball.

A further object of the invention is to provide a golf practice device of this type with a novel ball element which is made in one piece of light tough rubber and is constructed to provide a ball element which will have substantially the same feel when struck asa golf ball on the golf course. The apparatus herein shown is also provided with suitable registering means to register the force with which the ball element is struck, thereby giving an indication to the golfer as to how well-delivered each stroke is.

In order to give an understanding of the invention, I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claim.

In the drawings:

Fig. 1 is a top plan view of a golf practice device embodying my invention. f

Fig. 2 is a side View with a portion broken out.`

Fig. 3 is a section on theline 3 3, Fig. 1.

Fig. 4 is a View of the ball element.

Fig. 5 is a section on the line 5-5, Fig. 4.

My apparatus comprises a supporting frame in the form of an elongated box-like member I which is constructed with the two

sides

2 and 3 and the two

ends

4 and 5 and which is open at the top from the end 5 well toward the other end.

Extending transversely across the box-like supporting frame is a transverse shaft 6 that is journaled in bearings I carried by the

side walls

2 and 3.

Mounted on the shaft 8 is a ball element indicated generally at 8. This ball element is a unitary one-piece element comprising a hub portion 9 that is fast on the shaft 6 and two oppositely disposed radially extending arms III, each terminating in a ball portion I I. The ball element 8 is preferably made of light, tough rubber and which the hub 9, arms I0 and balls II all form integral parts of the complete structure.

Extending longitudinally of the box-like supporting frame I at the upper side thereof is a piece of leather I 2 which has a width slightly less than the transverse dimension of the opening in the top of said frame and which is supported at its ends only and is provided with a slot I3 through which the arms I0 project as the shaft 6 rotates. One end I8 of this leather member I2 is made fast to a bar `III which extends across the box-like member at one end of the opening in the top thereof and is supported by the

sides

2 and 3, said end I6 of the leather member being attached to the bar in any suitable way, as by means of screws I5.`

The other end I'I of ythe leather member I2 extends over the upper edge of the end 5 of the box and is secured to said end in some suitable Way. As herein shown, said edge I1 is clamped against the outside of the box end 5 by means of a clamping bar I8, the latter being held in its clamping relation by means of Clamping screws I9 which extend through the bar I8 and screw into an angle iron anchoring member 2B located on the inside of the box end 5.

s The leather I2 is thus suspended at its ends only and is unsupported at any point between its ends. The top of the box-like frame between the cross bar I4 and the left-.hand end of the frame (Figs. 1 and 2) is closed by a cover member indicated at 31.

The ball element 8 is so made that when the arms are in their vertical position, shown in Fig. 2, the ball I I at the upper end of the 'arm will be situated above the leather member I2 the conventional distance corresponding to that provided by an ordinary T.

In using the deviceJ the golfer stands alongside of the box member I and swings at the ball II in the same way that he would at a golf ball on the golf course. When the ball is struck, the ball element and` the shaft will be given a rapid rotative movement, the speed of rotation depending somewhat upon the effectiveness of the blow.

The complete apparatus comprises a registering or indicating device `connected to the shaft 6 and which operates to register the number of times which the shaft is rotated when the ball II is struck.

This registering `device comprises an indicating pointer 2| fast on the upper end of a vertical shaft 22 that is journaled at its lower end in suitable bearings 23 situated within the frame and the upper` end of which projects through and slightly above the cover member 31. Extending across the top of the frame is a bar 36 through which the upper end of the shaft 22 extends and which provides a bearing for such upper end. stationarily mounted on the bar 36 is a graduated dial 24 and the pointer 2| is situated close to the dial and moves over the face thereof as the shaft 22 is turned.

'Ihe vertical shaft 22 has a worm gear 25 thereon which meshes with a worm 26 on a shaft 21 extending longitudinally of the box-like element and journaled in suitable bearings 28. The shaft 21 has a worm gear 29 thereon which meshes with and is driven by a worm 38 fast on the shaft 6.

The rotation of the shaft 6 will, therefore,

to the indicating pointer 2|.

When the ball element Il is struck by agolf club, the force of the blow will set the ball member 8 and the shaft 8 in rapid rotation and the shaft will continue in rotation until the momentum of the spinning element 8 has been expended. If the blow of the golf club is jwell delivered and the ball isA squarely struck, the spinning element 8 will acquire a greater momentum than if the ball is topped or sliced Consequently the pointer 2| will be moved a greater distance over the dial 24 when the ball is squarely struck than when the ball is topped or sliced.` By notingv the extent to which the pointer 2| is moved as a result of any stroke, the golfer can determine whether the stroke was properly made or was a faulty stroke.

If desired, the dial 24 may be graduated. in terms which will represent a theoretical vdistance which the golfball wOuld be driven by any stroke.

The use of the leather element i2 to simulate thesurface of a golf course is of considerable advantage because if in practicing his strokes, the golfer accidently strikes the leather member I2,

Vthe latter will yield somewhat and will produce arm l has a cruciform shape in cross section,

each arm Ill presenting thetwo side ribs 32;. the

front rib 33 and the rear rib 34. The ball end II of each arm has approximately the same diameter as the hub 9, as clearly seen in Fig, 4, and the rear rib 34 of each arm, which is on the side of the arm and the ball opposite to that on which the ball is struck, extends from the ball to the hub, and the outer face of the rib is tangential to both the ball and the hub, as also clearly shown in Fig. 4. The rib 33 on `the front of each arm is shown as of lesser width. The purpose of providing a wider or thicker rib 34 on the rear side of each arm is' to re-inforce the arm so that it will withstand better the blow of the go'lf club without too great a yielding movement. 15V

i A' spinning element 8 having this construction is.wel1 adapted to take any punishment to which it may be subjected by the blows of the golf club,

" and at ,thesame time, it provides a ball element which,:when struck, produces in the golfer much the'same reaction as the receives when he strikes a golf ball on the golf course.

I claim:

A golf practice device comprising an elongated box-like supporting frame open at the top from one end well toward the other end, said other end of the frame being closed at the top beyond said opening, a strip of leather of slightly less width than the transversedimension of the opening in the top of said frame extending from one end to the other of said opening, means securing the ends of the strip of leather to the frame at the ends of the opening only, said strip having a slot and being unsupported along its sides between its ends and thus being suspended from its ends only, a rotary `shaft extending across the frame beneath the slot and journaled in the frame side walls, a unitary ball element of rubber mounted on said shaft and having two oppositely disposed radial arms each having a ballshaped end, a vertical shaft situated at the closed end of the frame and extending slightly through the top thereof, a graduated dial stationarily carried by said frame closely adjacent the top thereoLsaid shaft extending through said dial,

r a pointer secured to said vertical shaft and adapted to operate over said dial, and a driving connection between said vertical shaft and said firstnamed shaft. Y

- ARTHUR SMITH.