US2465163A

US2465163A - Corrosion prevention

Info

Publication number: US2465163A
Application number: US555580A
Authority: US
Inventors: Harry A Lockwood
Original assignee: Niles Bement Pond Co
Current assignee: Niles Bement Pond Co
Priority date: 1944-09-23
Filing date: 1944-09-23
Publication date: 1949-03-22
Anticipated expiration: 1966-03-22

Description

March 22, 1949.

mvENToR HEMA. Lamm/*UHU AGENT Patented Mar. 22, 1949 CORROSION PREVENTION Harry A. Lockwood, Meriden, Conn., assigner, by mesne assignments, to Niles-Bement-Pond Company, West Hartford, Conn., a corporation of New Jersey Application September 23, 1944, Serial No. 555,580

10 Claims.

The present invention relates to anti-corrosion apparatus and particularly to apparatus for preventing corrosion in a chamber having two openings of similar size, such as the barrel of a gun.

It is well known that the barrel of a gun must be kept clean and free from corrosion if it is to be accurate and to operate without jamming. The corrosion problem has been particularly diiiicult in the case of aircraft which may have machine guns mounted with their muzzles pointing forward. Some of these aircraft are required to fly for several hundred miles thru clouds or mist before reaching an area where the use of their guns is required. The moisture in the air may collect in the barrels of the guns and cause corrosion, so that when the pilot of the aircraft needs to use the guns, they do not function properly. It is also possible that the guns may not be used in several flights, with resulting corrosion during the period of non-use.

It is an object of the present invention to provide an improved method and means for preventing corrosion in the barrel of a gun.

A further object is to provide corrosion preventing means which may be applied to a gun so as to be positively secured in place, and yet be rapidly removed in the normal operation of the gun when its use is required, Without the necessity of making any special adjustment.

Other objects and advantages of the present invention will become apparent from a consideration of the appended specification, claims and drawing, in which Figure 1 represents an elevational View, partly in section, of an anti-corrosion device embodying the principles of my invention, and

Figure 2 represents an elevational View, partly in section, of the anti-corrosion device of Figure l installed in a machine gun.

There is shown in Figure 1 an elongated casing I0, which is filled with a suitable desiccating material l2, such as silica gel. The casing I is formed with an integral perforated end I4, and its opposite end is enclosed by a cap I5 having a groove I6 and a ange I'I. A sealing member I8 is provided for covering the perforated end I4. The casing IIJ, and the cap I5 are preferably formed of a plastic such as Tenite II (cellulose acetate butyrate). In constructing the device, the casing IG is filled from the end which appears at the left in the drawing. The cap I5 is then placed against the end of the casing Ill, and a suitable solvent, such as acetone, for the plastic is applied around the contacting surfaces of the cap and casing. As soon as the solvent dries, the cap and casing are integrally attached to each other.

The sealing member I3 is a boot moulded of synthetic rubber or other equivalent material, which serves the dual purpose of sealing the desiccator unit and the gun muzzle. The boot is provided with a bead 26 adjacent the opening therein. The boot I8 may be applied to the casing Ii by stretching the bead 2@ over the perforated end Iii. It should be noted that the external diameter of the sealing member I8 is larger than that of the casing I 0, so that the casing cannot be placed in the chamber of the gun Without removing the sealing member.

The casing I@ and the cap I5 together are shaped the same as a cartridge intended for use in the gun to be protected against corrosion by this device, so that said casing can be ejected by the operation of the ejector of the gun.

When the corrosion preventing device is to be applied to a gun, such as that shown generally at 2d in Figure 2, the sealing member I 8 is removed from the casing I0 by slipping off. The casing Ill is then placed in the cartridge chamber 26 of the gun, so that the air in the barrel can communicate thru the perforations in the end I4 with the desiccating material inside the casing Ill. The muzzle 28 of the gun is then sealed by stretching the sealing member I8 over it.

A gun protected against corrosion in this man-l ner may be carried a considerable distance without the occurrence of any undesirable corrosion due to moisture in the barrel. For example, if the gun is mounted in an aircraft, it may be carried several hundred -miles thru rain, fog and clouds, with no adverse corrosion effects. Furthermore, when the use of the gun is required, the pilot or other member of the aircraft crew merely has to operate his usual control, and the gun is immediately effective. The casing I0 is ejected from the cartridge chamber by the usual empty shell ejecting mechanism. The sealing member I8 is of course removed from the muzzle or torn open by the first bullet fired by the gun. There is no delay whatsoever in preparing the gun for use.

Although I have illustrated my invention as applied to a gun barrel, it should be readily apparent that it is equally applicable to the prevention of corrosion in other elongated chambers such as tubes or conduits, and in fact in any chamber having two openings of similar size. The particular type of sealing member disclosed may be applied to any opening having a peripheral projecting rim, such as a gun muzzle. Also, the invention may be applied to such a device under shipment, storage, service, or other conditions, as required.

While I have shown and described a preferred embodiment of my invention, other modifications will occur to those skilled in the art, and I therefore intend my invention to be limited only by the appended claims.

I claim as my invention:

1. A device for preventing corrosion in a gun iarrel, comprising a casing shaped like the rear )ortion of a cartridge and which casing is idapted for complete insertion in to substan- 'fially close the cartridge receiving end of the run barrel, said casing having performations in ts forward end, dehydrating material in said zasing, and a removable sealing member closing iaid perforated end having an edge portion ex- ;ending laterally beyond the side of said casing sufficiently to prevent insertion of the casing in ;he chamber of said barrel without removal of iaid member.

2. A device for preventing corrosion in a gun iarrel, comprising a casing shaped like a cartridge :'or said gun barrel and having perforations in its v'orward end, dehydrating material in said casing, ind a removable sealing member closing said per- .'orated end, said sealing member having an edge Jortion extending laterally beyond the side of ;aid casing to prevent insertion of the casing in ,he chamber of said gun barrel without removal if said member, said member being adapted to Je sealingly applied to the muzzle of said gun Lfter its removal from said end so that said barlel forms a chamber closed by said casing and ;aid member and having the air therein exposed yo said dehydrating material thru said perforated end.

3. Apparatus for preventing corrosion in an alongated tube, comprising a casing having one and perforated and adapted for insertion in one and of said tube, dehydrating material in said easing, and a sealing member normally sealingly engaging said perforated end of said casing and Ldapted after removal from said end to seal the )ther end of said tube.

4. Apparatus for preventing corrosion in a gun iarrel, comprising a casing having one end per- 'orated and adapted for insertion in the breech )f said barrel, dehydrating material in said casng, and a sealing member normally sealingly en- :aging said perforated end of said casing and Ldapted after removal from said end to seal the nuzzle of said barrel, said sealing member com- )rising a generally cylindrical rubber boot, closed Lt one end and having a bead around its open and, said bead being adapted when stretched ver said perforated end or said muzzle to mainain said boot in sealing engagement therewith.

5. Apparatus for preventing corrosion in a uhamber having two openings of approximately qual area, one of said openings having a periph- :ral projecting rim, comprising a casing having ne end perforated and adapted for insertion in he other of said openings, dehydrating material n said casing, and a sealing member normally ealingly engaging Ysaid perforated end of said asing and adapted after removal from said end o seal said one opening, said sealing member omprising a generally cylindrical rubber boot, losed at one end and having a bead around its pen end, said bead being adapted when tretched over said perforated end or said rim to maintain said boot in sealing engagement therelith.

6. A device for preventing corrosion in a gun rarrel, comprising a casing shaped like a carridge for said gun barrel for complete insertion n the chamber thereof, said casing containing .ehydrating material and having perforations in ts forward end and a groove and flange at its `pposite end for engagement by the shell ejector ""casing containing dehydrating material seal the chamber of a gun barrel, including means whereby said casing is ejected as a cartridge from said chamber, and a perforated closure at the forward end of said casing.

60 HARRY A. LOCKWOOD.

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

UNITED STATES PATENTS Number Name Date 45,020 Cleu Nov. 15, 1864 388,804 f Wooster Aug. 28, 1888 540,748/ Layton June 11, 1895 558,840f'/ Purves Apr. 21, 1896 1,856,867v Frederick `et al. May 3, 1932 1,868,961/ Ahrens July 26, 1932 1,877,685 f/Ottenheimer Sept. 13, 1932 G5 1,893,525 f Sherer Jan. 10, 1933 /12315949 W Cronsnedt Mar. so, 1943 2,327,334. Parker Aug. 17, 1943 @7,385,901 Ayers Dec. 7, 1943 2,341,310 i Calhoun et al. Feb. 8, 1944 7o FOREIGN PATENTS Number Country Date 12,087 Great Britain 1915 associated with said gun barrel to remove said casing from said chamber.

7. Apparatus for preventing corrosion in an elongated tube, comprising a casing conforming generally to the interior of said tube for insertion in one end thereof, said casing having one end perforated, dehydrating material in said casing, and a member sealing said perforated end and comprising a generally cylindrical rubber boot, closed at one end and having a bead around its open end, said bead being effective when stretched over said perforated end to maintain said member in sealing engagement therewith, said member also being adapted after its removal from said end to have said bead stretched over the other end of said tube to seal said other end, said casn ing and said member thereby forming with said tube a closed chamber whose interior air is exposed to said dehydrating material.

8. A device for preventing corrosion in a gun barrel, comprising a casing shaped like a cartridge for said gun barrel for insertion in the chamber thereof, said casing containing dehydrating material and having perforations in its vforward end, and a member sealing said forward end, said sealing member being readily removable from said end and adapted to seal the muzzle of said gun barrel, regardless of the external diameter thereof.

9. A device for preventing corrosion in the barrel of a gun, comprising a cartridge-shaped cas` ing containing dehydrating material and having one end perforated and adapted for insertion in the breech of said barrel, and a sealing member vnormally sealing said perforated end of said casing and adapted after removal from said end to seal the muzzle of said barrel; said casing having means whereby it is automatically ejected by the normal operation of said gun, and said sealing member being adapted to be automatically removed by the normal operation of said gun.

10. An article of manufacture comprising a and adapted to t wholly Within and substantially