US1329762A

US1329762A - Applying pressure to the interior of closed vessels

Info

Publication number: US1329762A
Application number: US263399A
Authority: US
Inventors: Albert E Guy
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-11-20
Filing date: 1918-11-20
Publication date: 1920-02-03
Anticipated expiration: 1937-02-03

Description

A. E. GUY. APPLYlNG PRESSURE To THE INTERIOR 0E CLOSED VESSELS.

APPLICATION FILED NOV. 20 |918.

Patented Feb. 3, 1920.

.ALBERT E. GUY, OF THE UNITED STATES ARMY.

PLYING PRESSURE T0 THE NTERIOR 0F CLOSED VESSELS.

Specification of Letters Patent.

Patented Feb. 3, 1920.'

Application filed November 2G, 1918. Serial No. 263,399.

(FILED 'UNDER THE AUT 0F MARCH 3, 1823, 22 STAT; L., 625.)

To all whom it may concern:

Be it lmown that l, ALBERT E. GUY, major, Ordnance Department, 'United States Army, a citizenof the United Statesysta tioned at "Washington, l). C., have invented an Improvement in Appiying Pressure to the Interior oi Closed Vessels, of which the following is a specification.

The invention described herein may be used by the Government, or any of its oliicers or employeesdn prosecution of work for the Government, or by any other person in the United States, without payment of any ro alty thereon.

iyfhis invention relates to a method wherein pressure is applied to the interior of closed vessels,lsaid applications involving the law of expansion of 'uids and solids under change in temperature.

.The invention is used in the treatment of the interior walls of a vessel to increase their resistance .to internal pressure and is intended particularly for gun tubes, which must withstand ver high internal pressure each timea shot is red.

It is also adapted for fitting linings in cylinders, tubes, and the like, and especially for relining gun tubes. It 1s very well adapted for use in connection with the process of treating tubes by pressure disclosed in m application filed October 17, 1918, Seria No. 258,652. Y

The objects of the invention are rapidity and ease of operation, low cost and adaptability to different conditions of manufacture and use.y The invention consists in the method and in the apparatus hereinafter de-.l

scribed and claimed.

The preferred means and mode of applying they invention toa gun 'tube is as follows, reference bein made to the accompanying drawings w ich showsui'table apparatus for carrying out the inventions. The same characters are -used to designate similar parts in the several views.

Figure 1 of the drawings isa side view, partly in section, of a gun tube, wherein a liner is to be'secured by an application of this method.

Fig. 2 is a similar view of the muzzle end of a gun tube showing a slightly modified arrangement of the parts when relining a 1n tube after the liner has been rihed.

eferring to the drawings by numerals, 10 indicates the gun, the interior or which may be provided with one or more shoulders as indicated at 11 and may be slightly tapered toward the muzzle of the gun as shown at 12.

A liner 13 is inserted into the gun tube from the breech end, and Ihas a snug lit throughout its entire length., Said liner, as will appear later, may be rifled in the usual manner, prior to its insertion into the gun tube.

A rod or coreV 141 is arranged to extend entirely through the gun, having at one end a Vlarge head 'or disk 15 adapted to bear against one end of the tube, and at its other end with a washer 16 mounted on a seat 17 near the end of the core to bear against the other end of the tube. The washer 16 is held firmly in position by. a nut 18 threaded on the end of the core which extends beyond washer 16, thus locating the core in place.` l

As a seal to the ends of the gun tube, paclrings are inserted as shown at 19 and annular rings 20 secured by set screws 21 are. arranged in contact with the packings to maintain same in contact with the

members

15 and 16 and form a perfect joint between the parts.

A space 22 is provided between the core 14 and the inner wall of the liner in which a pipe 23 of relatively heavy walls or small bore is coiled about the corel from end to end of the gun tube. Said pipe 23 isin communication at one enti with a passage 24 formed in the muzzle end of the core 14 and at its other end with passage 25 at the breech end of said core. A

The space 22 is filled with any substance having a higher coeilicient of expansion than the containing parts of the gun.

A pipe 26 from any source (not shown) for the supply of a temperature changing duid is connected by `branch pipe 27 with the muzzle end of the'coil 23 through passage 24, and a return or exhaust pipe 28 is in communication with .the breech end of f lil llt)

gun and the retaining band 33 a small space 36 is` provided to permit the insertion of a the portion 32 of the saw for removing by this method has liner after treatment been completed.

rl`he pressure produced Within the gun tube by the means described may be designed suiicient to stretch the inner gun beyond the elastic limit of the steel, and a permanent deformation or set of the inner layers of the steel is the result. .The

operation is stopped before the outer layers When A are stretched to their elastic limit. the pressure is relieved, the outer layers of the steel tend to return to their original size, thereby compressing the inner layers, which have been stretched too far to return to their original size and Which remain slightly stretched and hence under compression om the outer layers. The condition of the metal in the inner and outer regions of the gun tube after treatment by this method is similar to that of a composite gun formed by shrinking outer bands on the inner tube to compress the metal.

The operation is obvious and consists of lilling the space 22 surrounding' the core, with a substance having a greater coeiiicient of expansion than the surrounding metal, and conning same therein by sealing the end ofthe space. A temperature changing iuid may then be 23 to expand the ller and produce the desired result. The pipe 23 has Walls of sufcient thickness to withstand high external pressure, but thepi tings need not be o special thickness since Wall Of the I passed through the pipe ing 27 and 2 8 and itthey may not be subjected to-either internal or external pressure.

While the apparatus shown is of a character to clearly illustrate the application of the improved method, changes may be made in the form of apparatus Within the scope of the appended claims.

What I claim is:

1. The method of generatin pressure in the interior of the bore of a tu e, consisting of filling and sealing the tube and passing a temperature changing medium-through the interior of the tube.

.2. The method of generating pressure in the 'interior of a sealed tube containing a filler and a core of predetermined relative proportions, consisting of causing the expansion of the ller by passing a temperature changing medium therethrough.

The method of securing a liner in a sealed tube containing a filler and a core of predetermined relative proportions, consisting of applying a temperature changing medium to the iller Without detrimental effect to the metal of the tube.

4. The method of generating pressure inside the bore of a sealed tube, consisting of lling the tube and changing the temperature of the iller by a circulating medium.

5. The method of generating pressure inside the bore of a sealed tube, consisting of filling the tube and applying a temperature changing medium to the filler only.

6. The method of generating pressure inside the bore of a tube, consisting of filling the tube and applying a circulating temperature changing medium to the `filler only.

7 The method of generating pressure inside the bore of a tube, consisting oli formin a space adjacent the inner Wall of the tu e, filling the space with a substance, sealing and heating the substance by a circulating medium.

ALBERT E. GUY.