US1166099A - Method of making packing-rings. - Google Patents

Description

J. B. WENZEL.

METHOD OF MAKING PACKING RINGS.-

APPLICATION FILED JAN.9, 1914.

Patented Dec. 28, 191.5.

owe/EX JACOB B. WENZEL,

OF CHICAGO,

ILLINOIS.

METHOD OF MAKING PACKING-RINGS.

specification of Letters Patent.

Patented Dec. 2%, 1915.

Application filed January 9, 1914. Serial No. 811,257.

To all whom it may concern Be it known that I, JACOB B. WENZEL, a subject of Hungary, residing at Chicago, in the county of Cook'and State of Illinois, have invented certain Improvements in Methods of Making Packing-Rings, of which the following is a specification.

The objects of this invention are to provide an improved packing ring which shall have uniform tension for its entire circumference; to produce such tension by hammering or distorting the material of which the ring is composed, and afterward grinding or shaping the ring; to thus enable the hammering to be easily and conveniently done, without the marks of it being apparent in the finished ring; to provide a hammered ring which can be readily and cheaply manufactured, and to obtain other advantages and results as may be brought out in the following description.

Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several figures, Figure 1 is a view of a ring blank which has been sawed or cut; Fig. 2 is a cross-section of the same on line A-A, looking in the direction indicated by the arrow; Fig. 3 shows the ring after it has been hammered; Fig. 4 is a cross-section of the same on line BB looking in the direction indicated by the arrow; Fig. 5 is a view of the ring completed by grinding, and Fig. 6 is a cross-section of the same on line C, looking in the direction indicated by the arrow.

In the specific embodiment of the invention shown in said drawings. 1 indicates a plain circular ring 'of any suitable material, preferably metal, which is of substantially uniform cross-section at all points, preferably rectangular, and sawed or parted as at 2 to permit the expansion and contraction incident to use of the finished ring. The material of which the split ring thus described is composed is distorted or its density variably changed at different points of the ring so as to give it such a uniform tensicn that if its size is changed it will remain circular and the tendency to return to its normal size will be uniform all around the ring. In carrying out my present invention, this distortion or modified density is secured by compressing the material or metal of the ring at one or both of the opposite end edges 3, 3 of the ring which lie in substantially parallel planes. This compressing may be done in any suitable. manner, such as by rolls or dies, or by simply hammering the said surfaces 3, 3 either by hand or by machinery. The compression must be greatest at that point of the ring directly opposite its split 2 and from that point decreases toward each end of the ring; furthermore, the compression is preferably not uniform transversely of the ring in radial direction, but is greatest next to the inner curved surface 4 of the ring and diminishes radially outward toward the outer curved surface 5. This is all shown and illustrated in Figs. 3 and 4 of the drawings, where 6, 6 indicate the hammered portions of the opposite end edges of the ring, each of said hammerings being most pronounced opposite the split 2 and gradually diminishing in both directions toward the ends of the ring, the hammered surfaces being beveled or inclined inwardly toward the center of the ring.

While I have thus described in detail one way of compressing the ring, which I have found to give good results in practice, this is merely for illustration, and I do not wish to be understood as restricting myself thereto. The compression can be effected or accomplished in any desirable manner suggesting itself to those skilled in analogous arts, and by the use of proper machinery can be done with great rapidity and cheapness and yet with great accuracy and uniformity. After the ring has been compressed so as to distort the metal forming said ring, or change its density crosssecticnally of the ring at different points of its circumference, the ring is simply ground or otherwise shaped so that its cross-section is again rectangular or the opposite end edges restored to parallel relation. so that the ring will make a good joint. This is of course done by removing all the metal projccting beyond a plane perpendicular to the axis of the ring through the point of greatest compression. so that the width of the completed ring 7 as shown in Figs. 5 and 6 is that of the narrowest portion of the inner surface of the compressed ring 8 as shown in Figs. 3 and 4. The completed ring. therefore, while of rectangular cross-section, as was the blank 1 started with, is of somewhat less width than said blank, as shown in the drawings. The loss of metal is however slight, and the ease and rapidity of manufacture is great.

It will be understood that in hammering th ring blanks to compress the metal and secure uniform tension, a plurality of blows may be struck, either of the same force and varying in distance apart circumferentially of the ring, or of force varying circumferentially of the ring and delivered at equal distance apart.

By my improved method of manufacture, a packing ring is obtained which is of uniform tension and at the same time has smooth outer surfaces unbroken by any indentations or scorings.

Having thus described the invention, what I claim is,

1. A method of making packing rings, consisting in compressing an annular blank in varying degree circumferentially, and grinding or otherwise removing material from a surface of the ring to which pressure was applied until the ring is of the desired cross-section.

2. A method of making packing rings, consisting in compressing in a direction parallel to its axis an annular blank of substantially uniform cross-section in varying degree circumferentially, and grinding or otherwise removing material from the ring to bring its end-edges into parallel planes.

3. A method of making packing rings,

consisting in compressing an annular blank in a direction parallel to its axis and in varying degree circumferentially, and grinding or otherwise removing material from a surface of the ring to which pressure was applied until the ring is of the desired crosssection. I a

4. A method of making packing rings, consisting in compressing an annular blank in a direction parallel to its axis, said compression varying both transversely of the ring on radial lines and also circumferenti'ally of the ring, and'grinding or otherwise removing material from the ring to make it substantially uniform in cross-section.

5. A method of making packing rings, consisting in compressing an annular blank in a direction parallel to its axis in varying degree both transversely of the ring on radial lines and circumferentially of the ring, and grinding or otherwise removing material from the ring to make its end edges substantially parallel to each other.

JACOB B. WENZEL.

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