US2122023A

US2122023A - Javelin

Info

Publication number: US2122023A
Application number: US181808A
Authority: US
Inventors: Harry W Campbell; Tom S Graham
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-12-27
Filing date: 1937-12-27
Publication date: 1938-06-28
Anticipated expiration: 1955-06-28

Description

Julie 28, 1938. H. CAMPBELL ET AL 2,122,023

JAVELIN tzi/$77.507 77g Zd CCU? Filed De@I 27, 19:57

,a A; n L man @n3 ,if mZ/f 0.,'.

Patented June 28,1938 .z 1

9 claims. (c1. 27a- 759) y ."l'he present invention'relates to improvements in javelins. The purposel of this invention' is toA so constructL the point of the javelin as to make the` practice of and participation in thesport 1 5 of javelin throwing less pants and spectators fand make itpossible to adjust'nthe weight and balance'of the javelin. 'The invention contemplatesjthe provision of a safety point for rjavelins wherein fthe `entire `construction and mounting of the point upon the .javelin shaft is ysuch as -to absorb the shock when the javelin strikes an object, at the end'of the throw.

To carry out theA purposeof the invention varition andarrangement of Athe parts. yTwo such forms of the invention are shown in thevdrawing, although it is obviousv that other forms may embody the novel features of the invention.

will appear more fullyy from the :following description when taken in connection with the accompanying drawing which illustrates the two preferred forms of the invention.

In the drawing, Fig. 1 is a plan view of the point portionof thejavelin; 'p v j'Fig. 2 is an enlargement of the structure shown in Fig. l, with the point of the javelin shown in section to illustrate the construction thereof;

Fig. 3 is a fragmentary plan View, showing the javelin shaft and the mounting means for the point, and a Fig. 4 is a sectional view similar to Fig. 2, showing a slightly modified form of the invention.

Referring now to the drawing, in Fig. 1` there is shown a portion of a javelin including the usual wooden handle 5, a tapered steel ferrule 6, and our improved shaft point 1. -The ferrule 6 has a plunger 8 therein, which is rtapered to fit smoothly inside the ferrule and which is large enough to prevent its passing out the small end of the ferrule. This plunger is not secured in the ferrule and may be forced towardthe large end of the ferrule by pressure applied at the small end thereof.

The plunger 8 carries a screw threaded member ASI that threads into the plunger so that it can be removed. The member! also supports'a rubber tip I0 which has molded therein a metal sleeve II that is internally threadedto receive the member 9. Interposed betweenfthe tip I0 and the plunger 8 are a plurality of resilient washers I2 which may be constructed of any suitable material, such as rubber, and a protective member I3 that is hard enough to protect the resilient washers from the adjacent edge dangerous tov partici-` .'object at the end ofV its impact 'of the -point Illagain'st-'the objectacts to Ious modifications may be made infthe'cons'truc-y g 15.

The features and advantages of the invention UNITED*'srmrs of the 'ferrule-B.' Thevmember I3 .is a plugor.

sleeve which allows thev bolt 9 to plunge'up or@r down'. It may be constructedv` either ofahard fibrous material or metal. The'plug vI3 'acts as a guide for the bolt 9,`keeping the units "1,112,29'

and 8 `in true alignment,andvcentere d with 'r'e."

spect to` the .ferrule `6.

In operation, when'the javelin i'sthrown'and the point I0 strikesflight, the force of the compress the point Ill andthe washers 'I2,.and`

the ground or somezother since'theplunger 8 islfree to move, itmaybe 'l backed'up-in the fe'rrule The resultl'is 'a cushioning of the shock and a resultant reduc' tion in danger fromk injury if the. javelin should happen to strike anyr person.' Also, due to the i the point construction, there is little danger of the point being broken or bent so as to destroy its utility. vBetween the plug I3 and the plunger 8l there is a space I'I of suffiresilient nature of vcient width to enable the plunger action to take -place evenly and in perfect alignment. By inserting weights such as lead washers or shot in the space I1, the weight and balance of the javelin may be adjusted, should necessity arise. The pointv III may be made-of any suitable material. It isnot necessary that it bevrubber or'even. resilient to the extent that rubber is. The washersv I2 provide resiliency. The point I0 for ex ample may be `made of fiber or s'tandardfootballl cleat rubber. In the form ofthe invention shown in Fig. 4, the point of the javelin is of a more permanent construction, in that the ferrule 6 has the plunger 8 permanently fixed therein by a plurality of 1 rivets I4, and instead of using a series of rubberwashers around the member 9, we may use a mul. tiplicity of `fiberl washers I5. The rubber tip I0 hasthe screw threaded metal sleeve I I, the same as in the rst form. This form of the invention does not have the same degree of yield under shock that the plunger type has, since the pri--` mary yield in this case must come from the rubber tip I0. In order to take up any uneven-v ness, a brass bushing I6 may be inserted betweenv the plunger body 8 and the ferrule.

The present invention is capable of being applied directly to an existing javelin by merely cutting olf the present dangerous sharp weighted' num alloys now on the market, in order tcavoid l concentration of weight in the plunger itself.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. A javelin having a hollow ferrule, a point for the javelin comprising a resilient tip portion and a light Weight body mounted in the end of the ferrule and having means for fixing the tip to the ferrule.

2. A javelin having a resilient point mcveably mounted with respect'to thej'avelin shaft, said point comprising a plunger moveable in the forward end of the javelin, a threaded member pro-3 tip L8. A javelin having a hollow ferrule and a 3. A javelin having a resilient .point moveably mounted Vwith respect to the javelin shaft, said. .l point comprising a plunger moveable inthe for` jecting from the plunger and a resilient mounted on the free end of said member.

ward end of the javelin, a threaded member pro; jecting from the plunger and a resilient tip mounted on the free end of said member, said resilient tipbeing separatedifrom the plunger by a plurality of resilient washers.

4. A javelin having a shaft and a resilient point xed tothe shaft, said point comprising a rubber body having a sleeve therein of metal, and said javelin shaft having ascrew threaded member projecting therefrom to receive said sleeve.

5. A javelin having ashaft and a resilient point fixed to` the shaft, said point comprising a j rubber body having a sleeve therein of metaland said javelin` shaft having a screw threaded memberprojecting therefrom to receive said sleeve and a plurality of ber washers interposed between the end of the javelin shaft and the resilient tip. 1

6. A javelin having a hollow ferrule and a point comprising atip portion, spaced from the ferrule, a plunger movably mounted in the ferrule and fixed to said tip portion, and resilient means interposed between the tip portion and the ferrule.

7. A javelin having a hollow ferrule and a point comprising a tip portion, spaced from the ferrule, a plunger movably mounted in the ferrule and fixed to said tip portion, and resilient means interposed between the tip portion and the ferrule, said resilient means including a rubber --washen and means protecting the washer from the adjacent edge of the ferrule.

point Acomprising a tip portion spaced from the ferrule, ,-afplunger movably mounted in the ferrule and xedtosaid tip portion, and resilient meansinterposedbetween the tip portion and the ferrule, said resilient means being separated from the ferrule by a plug at the end of the ferrule and said plunger being spaced inwardly from said plug to provide achamber in which weights for balancing the javelin may be placed.

9. A javelin point comprising a tipportion, a mounting member projecting from said tip portion for'mounting it in spaced relation to the forward end of `va kjavelin shaft, means movably mounting said Amember in the end of the javelin shaft, Yand resilient means around said member between the tip portion and the adjacent end of the javelin shaft.

HARRYl W. CAMPBELL. TOM s. GRAHAM.