US576527A - Metallic packing - Google Patents

Description

(No Model.)

A. C. PAOKER. METALLIC PACKING.

No. 576,527. Patented Feb 2, 1897.

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\\\\\\\\\\\ mmll UNITED STATES I PATENT OFFICE.

ALONZO O. PAOKER, OF PITTSBURG, PENNSYLVANIA.

METALLIC PACKING.

SPECIFICATION forming part of Letters Patent No. 576,527, dated February 2, 1897.

Application filed March 21, 1896. Renewed December 28, 1896- Serial No. 617,293. (No model.)

To all whom it may concern:

Be it known that I, ALONZO O. PAOKER, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in' Metallic Packing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in stuffing-boxes, and has for its object the construction and arrangement of the parts thereof in such a manner as to efficiently apply and positively hold the packing to its position and work of preventing the escape around the piston-rod or valve-stem of steam, air, gas, or other pressure medium, as will be hereinafter fully set forth, described, and claimed.

Reference will be had to the accompanying drawings, forming part of this application, in which- Figure 1 is a vertical longitudinal section of a stuffing-box of a cylinder and of the elements of my invention in operative position. Fig. 2 is an internal perspective view of part of the casing, showing part of the walls and the location of the ports. Fig. 3 is an edge View of the band which holds the packingrings in operative position. Fig. 4 is a side and rim view of a packing-ring opened ready to slip upon the piston-rod or valve-stem and the accompanying ring therefor.

Reference will be had to the details of construction by figures, each referring to its own part throughout the several views.

The housing 1 is a stuffing-box of the ordinary construction common to most cylinders,

and within its cylindrical bore I place the cas-' ing 2, adapted to snugly fit the inner face of said bore, as shown. Said casing consists of a cylindrical body having, preferably, integrally formed upon its inner end and internal face the inwardly-reachin g annular walls 3 and 4, arranged a proper distance apart and having between them the compartment 5, the

purpose of which will be hereinafter set forth.

Said wallsterminate on nearly parallel lines, the inner wall 3 being slightly shorter in reach, both forming the bore of proper diameter to receive the piston-rod, the inner wall loosely and the outer wall snugly encircling such rod or Valve-stem. The wall 4 is provided with radially-disposed ports 6, which admit steam or other pressure to the annular chamber 7. Said chamber is formed by the outer parts of the body of the casing 2 and the sealing-diaph ragm 8, which has on the inner edge of its outer rim the recess 9, adapted to form a seat for the outer free end of the casing 2. Within the housing thus formed by the casing and diaphragm is mounted the packing proper, which consists of the lubricant-rings 10, reinforced and held in operative position by the disks 11, the retainingband 12, and the annular rings 13, as shown. The disks 11 have a bore of sufficient diameter to snugly receive the piston-rod, while their outer rims are inclined at right angles toward each other and form the lips 14. the outer edges of which are intended to impinge upon the outer edge of the tension-band,while upon the lower side thereof is provided the recess or groove 15.

I recess the outer edge of the lubricant-ring and thus provide a seat for the annular rings 13, which are preferably rectangular in crosssection and carry upon their outer corner, with'respect to the chamber 7 ,the radial flange 16, adapted to fit into the groove 15, and also meet and in conjunction with the rings 13 be provided with seats for the rings 13, and

also that as many rings may be employed as desired. 7

It is thought that from the drawings an the foregoing description the manner of constructing and assembling the several parts of my metal packing will be clearly understood. Should the inner face of the stuffing-box be rough or imperfectly formed, I prefer to use a disk of lead or other yielding material 17, placed against the outer face of the wall 18, against which the casing 2 is forced home, preventing the escape of steam or the like between the inner face of the stulfmg-box and the periphery of the casing. The outer wall of the stuffing-box is formed by the disk or gland 19, having integrally formed thereupon the inwardly-reaching hub 20 and the outwardly-extending flange 21, which latter is beveled or recessed on its free end and inner face, as indicated by 22. Said recess 22, in connection with the encircling collar 23, se cured to the flange 21 by set-screws or threads, forms a receptacle or auxiliary packing-box adapted to receive and retain a swab of oil waste and the like. The gland 19 is secured to the stuffing-box, preferably by set-screws, and the hub 20 is intended to hold the sealing-diaphragm 8 to its work and operative position, as shown. I prefer to cut the packing-ring entirely through 011 one side and partly through at anopposite point, (shown in Fig. 4,) that it may be readily placed in operative position without disconnecting the piston-rod or stem.

In order to reinforce the packing-rin gs, if deemed necessary, I provide upon their outer face the median annular groove 24, intended to receive the encircling rin g 25, secured thereon in any preferred manner. The tensionband 12 is preferably made of steel or drawn brass, though other material may be employed, the ends of which are so tapered that when overlapping each other the lubricantrings are reinforced the same at all points of their periphery. By this construction and arrangement of parts it will be seen that I have effected the utilization of the impact of steam or other pressure medium to hold the lubricant-rings closely to their work of uniformly contacting the piston-rod or valvestem, preventing the escape and loss of such medium. Should the steam or other pressure be cut 0% from the cylinders, as in the case of locomotives and the like running by their own impetus, the lubricant-rings are still held snugly to the piston-rod (though not nearly so tightly) by the tensile property of the band 12. This arrangement automatically frees the piston-rod or valve-stem from severe wear when not performing their natural function. There being some play between the stufling-box wall and the inner wall of the casing and the piston, the steam follows the latter to the wall 4 and enters the chamber 7 through the ports 6. Should there be any condensation, the water will remain around the piston-rod, while the dry steam will enter the ports, and such result I claim is of great importance and value, this control of the steam and the means I have provided to effectually inclose the lubricantrings and separate the same from steam or water contact preserving their lubricant properties indefinitely. The ratio of pressure is controlled by the number and size of said ports, and such pressure may be nicely differentiated by such means, as will be read ily understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a metallic packing for steam and other pressure medium, the combination with a stuffing-box, of the casing 2 having inwardlyreaching annular walls 3, 4, formed integrally therewith the latter provided with radial ports 6; a closure for the outer end of said casing consisting of the sealing-diaphragm 8, packing-rings encircling the piston-rod and means forpreventin g the escape of the pressure medium through the housing thus formed, substantially as set forth.

2. A metallic packing for steam and other pressure medium consisting of the lubricantrings, 10, the outer edges being recessed to receive the reinforcing-rings, 13, said rings having the annular flange, 16; the disks, 11, adapted to reinforce the 1ubricantrings and having their free or outer edges inclined toward each other and formed to engage said annular flange; the tension-band, 12, reaching from one of said disks to the other and suitable means for holding said parts in operative position and permitting the impact of the pressure medium upon said tensionband, as and for the purpose set forth.

3. A metallic packing for steam and other pressure medium, the combination with a stuflingbox of the casing, 2, consisting of the cylindrical body, having on its inner face the integrally-formed annular walls, 3, 4-, theformer wall loosely and the latter snugly adapted to encircle the piston-rod or valve-stem and provided with ports near its junction with the body; the diaphragm, 8, in junction with the free end of said casing; the lubricantrings encircling the piston-rod within the housing thus formed, and means for incasing and protecting the lubricant-rings and permitting the universal impact of the pressure medium to the outer surface of said rings, as and for the purpose set forth.

4. The herein-described metallic packing for steam and other pressure medium consisting of the casing provided with the compartment, 5, formed by the walls, 3, 4, adapted to facilitate the separation :of water and dry steam, and the admission of the latter only through the ports in the inner wall, the diaphragm contacting the free end of the casing, the gland, 19, having the inner hub, 20, and the outer flange, 21, integrally formed therewith, said gland adapted to complete an inclosure of the stuffing-box and secure said diaphragm in operative position, and further provide the auxiliary packing, the collar, 23, securing such packing; and the lubricant rings secured within the housing formed by the diaphragm and the casing, substantially as described and for the purpose set forth.

I11 testimony whereof I affix my signature in presence of two witnesses.

ALONZO O. PACKER.

\Vitnesses P. M. CUSHING, T. B. CUSHING.

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