US1892597A

US1892597A - Method of making rod packing

Info

Publication number: US1892597A
Application number: US576728A
Authority: US
Inventors: Walter K Queen
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-11-23
Filing date: 1931-11-23
Publication date: 1932-12-27
Anticipated expiration: 1949-12-27

Description

Dec. 27, ZERB] AUTOMATIC DEVICE FOR LIMITING THE SPEED OF INTERNAL COMBUSTION ENGINES, MORE PARTICULARLY OF TRACTOR ENGINES OR THE LIKE Filed May 28, 1950 F g 7 2 l 9 i 5 g H I 2 s 3 3 o o 5 I g 0 42' S 3 z I 12/ s a I I 1 5 as m/J-w/ 5 Patented Jan. 10, 1933 v UNITED STATES WALTER K. QUEEN, OF NEEDHA'M HEIGHTS, MASSACHUSETTS mn'rrron or MAKING non PACKmG Application filed November 23, 1931. Serial No. 576,728.

It has been found that the packing ring of my United States Letters Patent 1,716,977, June 11, 1929, although well adapted for its intended purpose, as shown by an extensive public use, is subject to a certain limitation, namely, that when the piston rod is removed for repairs thereto, or to the piston attached thereto, the packing is destroyed because the adhesive 'which retains the spirally-wound strip of asbestos in shape until it is placed in the stuffing box is dissipated by the heat to which it is subjected. E It is therefore the object of the present invention to provide a method of making a packing ring which has all the advantages of the ring set forth in said Letters Patent, and will retain its shape when removed from the stuffing box after a period of use as, for example, when it becomes necessary for any 0 reason to remove the rod packed by said ring.

To this end therefore my invention contemplates the use of a single homogeneous, relatively-thick strip of packing material such as woven fabric first arranged in cylindrical form with the ends thereof abutting (as distinguished from the cylinder formed by a plurality of adhesively-secured turns of the relatively thin fabric strip described in said Letters Patent) and the compression of the same into an annulus having an outer con vex conical surface and an inner concave conical surface with a slit through the wall thereof.

My invention will be described by reference to the accompanying drawing which is to be taken as illustrative and not restrictive. In said drawing,-

Figure 1 is a plan View of a relatively thick strip of packing material, for example, 0 woven fabric such as asbestos cotton wool and the like, with or without wire insertion;

Fig. 2 is a transverse section taken on the line 2--2 of Fig. 1;

Fig. 3 is a vertical section of a cylindrical ring formed by the fabric-strip shown in Fig. 1; j

Fig. 4 is a section, certain parts being shown in elevation, of a die whereby the cylindrical ring shown in Fig. 2 is converted 00 into an annulus having an outer convex conical surface and an inner concave fionical surface;

Fig. 5 is an elevation of the completed packing ring constructed in accordance with the present invention.

In the particular drawing selected to illustratethe apparatus employed for practicing my method, 10 is a single, coherent, homogeneous, relatively-thick strip of packing material such as woven fabric, for example, woven asbestos, which may be provided with wire insertion, as indicated at 11. The said strip of woven fabric is much thicker than the relatively-thin helically-wound strips described in my prior patent, the thickness in fact bein substantially equal to that of the wall of t 1e cylinder formed by a number of spiral winds of said relatively-thin strip shown in Fig. 6 of said patent.

The ends 12 of the fabric strip preferably .areinclined to the long sides thereof, al-

though they may be at right angles thereto. Thefabric strip is arranged" in cylindrical. form, as indicated in Fig. 3, with the @ds thereof abutting, and is then placed in a die plate 13 having a cone-shaped depression and compressed by the die member 14 having a conical portion corresponding with the cone-shaped depression of the die plate.

As the result of such compression there is formed an annulus having an outer convex conical surface 15 and an inner concave conical surface 16, the said surfaces preferably being parallel and uniting the concentric cylindrical working edges 17, 18 which, when the packing ring is in use, are in contact, respectively, with the rod to be packed and the inner periphery of the stuffing box. As indicated in Fig. 5, the wall ofthe annulus is slit, and where the ends of the strip 10 are inclined to the length thereof, such slit will be angularly related with respect to a generatrixt of the conical surfacesof the finished packing ring.

The packing ring formed in accordance with the present invention is used in precisely the same manner set forth in my prior patent and is self-setting because the pressure a ainst which the rod is, to be packed acts oil the forward portion of the working edge "x 11y prioipat glut 1iis be liment of my invention and means whereby 11y methaci may be reallzed 1n practlce, wlth- 011i: howevev innitmg myself thereto, What i 12. .2111: and desire to secure by Letters Patent A method of making a siitted frustoa1 packing-ring which consiss in cut-ting single, homogeneous, relativelyvi of woven fabric each the same 1 e l iwih' thereef, disposing said with the finds ihers dieing the same into c0- Ago-001111011]. annulus. hereof, I have hereunto subthis day of November,

T1333 QUEEN.