US1428976A - Metallic packing - Google Patents

Description

F. E. PAYNE,

METALLIC PACKING.

APPLICATION man 050.1. 1918.

Patented Sept. 12, 1922.,

ill/)7 55 Wank 51 d 72/ M24 MK/M Patented Sept. 12,- 1922.

UNITED STATES FRANK E. PAYNE, 0F GLENCOE, ILLINOIS.

METALLIC PACKING.

Application filed December 7, 1918. Serial No. 265,674,.

T 0 all to ham it may concern:

Be it known that I, FRANK E. PAYNE, a citizen of the United States, residing at Glencoe, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Metallic Packing, of which the following is a specification.

My invention relates to improvements in metallic packing, such as is used to prevent leakage of steam, water, oil and other gases, vapors or fluids.

The object of the present invention is to provide a metallic packing which is particularly effective in preventing leakage of hot oil and superheated steam and other high temperature media.

In the accompanying drawings, I have illustrated a packing. which will serve to represent one form of the invention.

Figure 1 is a perspective view showing the manner in which said packing is made.

Fig. 2 is a cross sectional view thereof.

Fig. 3 is a similar sectional view showing the packing rolled or pressed to rectangular cross sectional outline, and

Fig. 4 is an elevation of a short length of completed packing bent to form a ring.

The packing consists essentially of a flexible core 1 adapted to withstand high temeratures without deterioration. Said core is preferably metal made from loose strands or small wires, which may be interlaced, twisted or braided in various different ways. Copper wire is preferably employed for this purpose, although other metals and other forms are contemplated. Such a 'core is flexible, compressible and capable of withstanding considerable pressure without crushing and also has sutlicient. tensile strength to enable it to be bent and otherwise distorted without breaking easily. Said core is then rendered impervious to fluid pressure by covering it with a suitable coverin or wrapping 2, which is preferably made 0 metal foil. Copper ribbon is preferable for this purpose, although I do not limit myself to this material. The metal ribbon may be readily wrapped around the core by rotating the latter in a specially arranged machine, the metal ribbon being wound on the core spirally. A single layer or plurality of layers may be wrapped-about the core depending on thekind of service in which the packin is tobeemployed. Where more than one .ayer of wrapping is employed, the metal ribbon may be wound back and forth. Where the core is loosely braided, the wrapping, which is drawn tightly about the core, serves to compress the same somewhat and render the finished product compact and impervious to fluid pressure without interfering with its flexibility. In other words, the finished length of packing may be bent into circular form without opening cracks, which would permitleakage of steam, oil or other fluids or gases.

Where the metal ribbon employed has sufficient tensile strength to enable it to be wrapped tightly about the core, without breaking or tearing, the necessary compactness is obtained merely by causing a little friction on the ribbon as it is being fed to the rotating core or as it is being revolved about the core in case the core is stationary during the winding operation. \Vhere very thin metal foil is used, however, it is sometimes desirable or necessary to'wind on with the ribbon a tension member of, strin or wire to prevent tearing of the ribbon. tlcll tension member is illustrated in one of my prior applications and in prior patents of John Crane, Nos. 1,151,344 and 1,206.306. Where the packing is intended for very hi h temperature conditions, the plain metal foil is wound about the core. \Vhere temerature conditions are not extremely high, it is desirable in certain cases to coat the foil with a lubricating compound 3, such as graphite, as the foil is being wound on the core, or prior thereto.

The packing is usually completed in long lengths, and 1s circular in cross section, as shown in Fig. 2. The cross sectional outline, however, may thereafter be changed in any way desired A very common form is the rectangular outline shown in Fig. 3.-

This section is obtained by running the packing through rollers. or otherwise compressing it: Long lengths of packing are thereafter cut up into smaller lengths, and may be bent into circular form, as shown in Fig. 4, to form packing rings, or they may be otherwise bent to adapt them for the particular service for which they are intended. The packing may also be formed as a flat gasket or closed ring.

Packing, constructed as herein described and consisting perferably of copper ribbon wound about braided copper wire, is particularly adapted for use with hot oil or superheated steam, where temperatures of possibly 800 or 900 F. are reached. However,

various-other classes of service are dontem plated.

What I claim is:

1.' A packing comprising .a flexible, compressible; core consisting of a plurality of metallic strands, and a metallic wrapping therefor to render said core impervious to fluid pressure and forming, the wearing surface therefor.

2. A metallic packing comprising a core of interlaced metal wire forming a flexible, compressible member, and an outer covering of metal ribbon wound spirally on said. core to render the same impervious to fluid pres-- sure.

3. A metallic packing comprising a core of braided wire and a copper ribbon wound I back and forth thereon spirally in a plurality of layers.

sible core of braided copper wire, and .a

wrapping of thin copper ribbon about said core to render the latter impervious to fluid. pressure.

6. A packing comprising a flexible core consisting of a plurality of metallic strands,

a metallic wrapping therefor to render said core impervious to fluid pressure and forming the wearing surface therefor, and lubri eating material applied to said wrapping.

In testimony whereof, I have subscribed my name. I

FRANK E. PAYNE.-

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