US684991A - Metallic packing. - Google Patents

Description

No. 634,991. Patented ont. 22, 190|.v

, P. F. LEAnv.

METALLIC PACKING.

(Application med Apr. 4, 1900.) (No Model.)

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Nirnn STA-res yPATENT OFFICE.

PHILIP F. LEARY, OF FALL RIVER, MASSACHUSETTS.

METALLIC PACKING.

SPECIFICATION forming part of-Letters Patent No. 684,991, .dated October 22, 19 0]..

Application led April 4, 1900. Serial No. 11,422. (No model.)

T0 @ZZ whom i Tf1/wy conceive:

Be it known that I, PHILIP F. LEARY, a citizen of the United States, and a resident of Fall River, county of Bristol, Massachusetts, have invented certain new and useful Improvements in Metallic Packings, of which the followingis a specification.

My invention relates to metallic packings for steam or other joints, and comprises certain improvements therein intended to secure the more perfect equalization of Wear and a more complete adaptation to irregularities in the surface of the rod or other surface to be packed.

To these ends it comprises a sectional ring intersected at intervals from the inner to the outer face, all of which intersections are formed on a curve; preferably the arc of a circle. The number of pieces or sections may 'be varied for diiferent sizes of rings; but the underlying principle of forming all the intersecting cuts from the inner to the outer surface on a curve will remain the same. By referring to my formerpateut, No. 588,681, it will be seen that I there made a partial application of this principle; but it will be noticed that theworking of the parts on their curved joints maysometimes have a tendency to open up or disturb the straight joint sufficiently to permit a slight leakage. The packing made according to my present invention completely overcomes such a tendency.

Referring to the drawings, Figure lis a face View of my packing applied to a rod. Fig. 2 is a similar view applied to packing a cylinder or other inside surface. Fig. 3 is a side elevation showing my packing as it appears edgewise with the Spanner-spring. Fig. 4 is va similar View of the internal packing of Fig.

2 without the Spanner-spring. Fig. 5 is a face view of the packing as it would be applied for use with a cone-ring Where the gland is too small for a Spanner. Fig. 6 is a central section of the gland-packing and conering With the rod.

As herein shown, the packing-ring coinprises a series of approximately Wedge-shaped pieces b, Whose inner or Wear faces are concaved to fit the rod and Whose ends or jointforming surfaces are formed on the arcs of circles intersecting the inner and outer faces of the ring. Itwill be observed that the inner face of the piecev b is the wide face and that the piece tapers down to the outside face like a wedge. The pieces a are arranged intermediate of the Wedge-shaped vpieces and are formed with concave inner wear-faces and curved ends which, as shown in this instance, form arcs of the same circle. The adjacent ends of sections aand b are ground on the arcs ofequal circles,`one being convex and the other concave to form a perfect j oint.

Of coursein the rod-packingl the precise lines of the outside surfaces are not important; but I have shown this outer surface as circular and concentric With the inner or Wear surface, which is the most convenient form.

When a Spanner-spring is used, I may'form little shoulders or projections on the outside surface, as at a', to forni a bearing-point for the Spanner-spring c.y

It will be observed that the ring is made up of a series of sections having curved wearsurfaces (concave in Fig. 1 and convex in Fig. 2) and concave ends alternating with sections having similar wear-surfaces and convex ends. Y Y

In cases Where the gland is too small in diameter to accommodate the Spanner-spring and packing of the desired sizel' may bevel the lateral faces of the sectional ring and Aemploy a cone-ring e, which, as will be understood by those skilled in the art, by the,

action of a spring h, thrusting against the cap of the gland, operates to force all parts of the packing equally toward the rod 7e;

In Figs. 3 and 4 I have shown how precisely the same Ypacking may be used as an internal packing,the parts in this case being thrust outwardly against the inner surface of a cylinder or the like by springs d, interposed between the parts b and the piston or head vl,

said springs being heldin position by studs b'.

I prefer for convenience to so lay out and construct my rod-packing that the inner face of part h will be a little longer than the inner face of part a. By doing so as the inner faces become worn they will tend to become equal, since the more the Wedge-shaped piece c Wears down the shorter its inner face be- IOO comes, While the inner face a increases in length as it Wears down.

It will be noticed that both the outer and the inner faces of. the Wedge-shaped sections,

as well as the intermediate sections, present a curved surface which coincides With vthe outer and inner circles, respectively, upon which the packing-ring as a Whole is constructed. This construction permits this packing to be used both as an outside and inside packing.

Vithout attempting to indicate all the changes in forrn or arrangement of which my invent-ion is capable or all the modes of its use, what I claim is l. A sectional packing-ring comprising a plurality of sections having a wear-face and concave ends, arranged in alternation withV as described.

3. A metallic packing comprising a sectional ring containing a plurality of approximately wedge-shaped sections whose wear-surfaces and whose ends are formed on the arcs of circles, and intermediate sections, whose Wearsnrfaces and Whose ends are formed on the arcs of circles corresponding to those of the rst-named sections, the Wear-surfaces of the Wedge-sections being somewhat longerin eX- tent than the Wear-surfaces of the intermediate sections so that as the ring becomes Worn, the surfaces of tWo adjacent sections tend to become equal, substantially as described.

4. A sectional packing-ring comprising a series of approximately Wedge-shaped sec tions, Whose outside faces are of relatively less length than the inside faces, both of said faces having the saine curvature respectively as the outside and the inside surfaces of the ring itself, and a series of intermediate seetions Whose ends form joints with the firstnamed sections on curves intersecting the outer and inner faces of the Whole ring,snb stantially as described.

In Witness whereof I have hereunto set my hand this 24th day of February, A. I). 1900.

PHILIP F. LEARY.

AREA N. LINCOLN, GEORGE M. Hoon.

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