US2420668A - Filler fixture having a wear ring and a support ring - Google Patents

Description

May 20, 1947. 1-. F. KNIGHT 2,420,668

FILLER FIXTURE HAVING A WEAR RING AND A SUPPORT RING Filed Sept. 18, 1942 Patented May 20, 1947 UNITED STATS FILLER FIXTURE HAVING A WEAR RING AND A SUPPORT RING (Granted under the act of March 3, 1883, as amended April 30, 1928; 3'70 0. G. 757) 4 Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to a filler fixture such as would be used in charging an ammunition component with explosive.

It is the object of this invention to provide a filler fixture which permits the rapid loading of shell with explosive charge in comparative safety. It is also the object of the invention to provide a fixture which can be replaced in part without replacement of the entire fixture, when a part of the fixture becomes worn. The fixture consists of a funnel secured to a holder which is adapted to engage the threads of the filler hole of a shell. The holder is preferably made up of two rings: a supporting ring and a wear ring, the latter being readily replaceable. The replaceability feature is desirable because of the considerable wear imposed on the threads by the continual screwing and unscrewing to which the ring would be subjected in use. The component parts are made of a nonsparking material, such as copper or its alloys, or even of non-metallic materials.

The specific nature of the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawings in which:

Fig. 1 shows a center longitudinal section of a fixture made according to the invention.

Fig. 2 is a bottom plan view of the device of Fig. 1.

In the drawings, a funnel 2 is shown secured, as by soldering, to a holder adapted to engage the threaded opening of a shell to be filled with explosive. The holder may, if desired, be made all in one piece, but it preferably comprises an internally tapered support ring 4 bearing the funnel 2, said support ring being formed with an externally threaded dependent extension having a discharge opening it at its lower end, and an internally and externally threaded wear ring 6 releasably threaded on said dependent extension of said support ring as indicated at 8. Separation of the said rings by unscrewing while said holder is being screwed into or out of the threaded opening of a shell is prevented by a plurality of set screws Ii] carried in suitable bores in the said wear ring 6 and adapted to engage said support ring 4 upwardly of said dependent extension thereof. The external threads 12 of wear ring 6 are arranged for engagement with the threads of the filler opening of a shell. There are only two of these threads, to permit quick assembly and disassembly of the holder and shell. However, repeated use of the holder, resulting in wear on threads l2 to the point where they are useless, does not make the whole fixture useless, because ring 6 can be removed and replaced by a new ring having good threads.

The holder is preferably provided with a nipple Id at the outlet end of the discharge opening I6. The said nipple is arranged for seating in the upper end of the fill tube of said shell, the upper end of which is shown in dotted lines at I8, thus providing effective sealing means for the shell while being filled.

I claim:

1. A filler fixture for loading .an explosive charge into shell having an internally threaded opening, comprising an internally and externally threaded wear ring, said external threads being arranged for assembly in the threaded opening of said shell, a support ring internally tapered for the receipt of a funnel and having an externally threaded dependent hollow extension with a discharge opening at its lower end, said support ring being constructed and arranged to be screwed into said wear ring and extend therethrough into the opening in said shell, and releasable locking means carried by said wear ring and engaging said support ring above said extension whereby the joint rotation of said wear ring and said support ring is assured in the assembly or disassembly of said fixture and said shell.

2. The structure of claim 1 characterized in that said releasable locking means carried by said wear ring comprises a plurality of set screws supported in suitable bores provided therein in engagement with the outer surface of said support ring above its threaded extension.

3. The structure of claim 1 in which the said support ring is provided with sealing means for the shell while being filled comprising a nipple carried on the lower end of its threaded extension adjacent the discharge opening therein.

4. A filler fixture for loading an explosive charge into a shell having an internally threaded opening, comprising, in combination, an internally and externally threaded wear ring, said external threads being arranged for assembly in the threaded opening of said shell, a support ring provided with a tapered internal cavity and having an externally threaded dep hollow e 'sion with a discharge opening at its lower end,

said support ring being constructed and arranged to be screwed into said wear ring and extend therethrough into the opening in said shell, a funnel permanently secured in the tapered cavity in said support ring and communicating with said discharge opening, sealing means for said shell while being filled carried on said hollow extension at the lower end thereof adjacent the discharge opening therein, and releasable locking means comprising a plurality of set screws carried by said wear ring in engagement With said support ring above said hollow extension whereby the joint rotation of said Wear ring and said support ring is assured in the assembly or disassembly of said fixture and said shell.

THOMAS F. KNIGHT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 358,021 Deasey Feb. 22, 1887 1,899,095 Knight et a1 Feb. 28, 1933 2,192,498 Hyman Mar. 5, 1940 1,205,666 Rosenfeld Nov. 21, 1916 1,865,926 Laing July 5, 1932 FOREIGN PATENTS 15 Number Country Date 808,489 France Nov. 14, 1936

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