US816478A - Packing-ring. - Google Patents

Description

No. 816,478. PATENTED MAR. 27, 1906.

' H. KIRSCHNING, DBGD.

n. A. Kmsonmm, ADMINISTBATBIX. PACKING RING.

P T 9 AP LIOA ION FILED JAN 17, 1 06 2 SHE T 2.

UNITED STATES PATENT orrron.

EMMA AMALIE KIRSCHNING, OF BERLIN, GERMANY, ADMINISTRATRIX OF HERMANN KIRSOHNING, DECEASED.

PACKING-RING.

Specification of Letters'Patent.

Patented March 27, 1906.

To all whom it may concern.-

Be it known that HERMANN KIRSOHNING, deceased, late a subject ofthe German Emperor, and a resident of 132 Ackerstrasse, Ber- -'n, Germany, did invent certain new and useful Improvements in Packing-Rings, of which the following is a specification.

This invention relates to improvements in packing-rin s produced in the known manner by spira ly winding or rolling up strips of flexible material.

The novel feature of the improved packing-rings lies in the fact that adjacent coils or convolutions of the said strips of material are made in the form of troughs, channels, or the I like'th'at is to say, the surface of the strips is protuberant or convex on one side and recessed or concave on the other side, so that the protuberant surface of one coil is adapted to engage the recessed surface of the adjacent coil somewhat in the manner of a so-called feather or spline. The protuberant and recessed surfaces need not be continuous. If desired, certain portions-or sections of each coil may remain substantially cylindrical, but

- in that case also the arrangement is of course such that the rotuberant surface parts of each coil coinci e with recessed surface parts of the adjacent coil. By'this means the durabilit of the rings is considerably increased, and t e accidental unwinding or lateral spreading thereof, by which'they may drop out of the joints to be made tight, is prevented. In the absence of the spline and groove connections referred to the unwinding or spreading of the bent strips is particularly liable to. occur when the rin has become hot and wet. If, for examp e, an adhesive substance has been used to interconnect the coils of material, the said substance is of course rendered soft by heatand moisture.

For producing a packing-ring according to the present invention a single strip of material can be wound up in the manner indicated, or'a pluralit of such strips, wound separately or toget er, can be used. The material of which the strips consist varies, of course, according to the nature of the requirements. Fiber, asbestos, india-rubber, and the like can, for example, be used, and, if desired, strips of various materials can be made-to alternate with each other in the construction of a single ring. Thus, for instance,

strips of strong fibrous material can be used alternately with strips of softer material, such as woven fabric or asbestos, and the rings can be strengthened by means of rims, stays, trusses, or the like, of metal or other substantially rigid material.

' Theterm packing-ring used in connection with the present invention includes, of

course, annular, elliptical, 'and polygonal packings.

The invention will be fully understood upon reference to the accompanying drawings,inwhich.

Figures 1- and 2 are respectivel a crosssection and a plan of the unfinishe packing ring. Figs. 3 and 4 are res ectivel a cross- -sectionand a plan of a finis ed ac 'ng-r'ing. Figs. 5 and 6, respectively, an Fi s. 7 and 8 are respectively cross-sections an plans of otherwise bended packing-rings.

In the first place a strip or strips of fiat flexible material or materials are wound up 3 and 4 the strip of material forming the coi s b is bent in such a manner that in cross-section each part of the strip is V-shaped, with the apex c of the V directed toward the outer circumference of the ring.

Figs. 5 and 6 illustrate a form of construction 1n which the outer coils d" are outwardly bent, the inner coils e being inwardly bent.

The outermost and innermost coils'are bent at more acute angles than the colls between them, the acuteness of the sald angles decreasing as the central coil f of the layer is a I roached. The said coil f is not angular y cut atall; but both its inner and its outer surface are slightly angular in order to fit a ainst the respective adjacent coil-surfaces. TIie bending of the strips in the manner shown in Figs. 3 and 5 can either be efiected between suitably-shaped wheels or cylinders acting in lateral direction or by means of lateral pressure exerted on the wound strip with the aid of a suitably-shaped tool.

The packing-ring shown in Flgs. 3 and 4 comprises an internal ring or layer m of metal or the like. If desired, a similar ring or layer can be placed round the external circumference of the outermost coil 6. Metallic stri s can of course also be inserted between t e strips or coils forming the packing-ring.

In the form of construction shown in Fi s. 7 and 8 the strips of material of which t e packing-rm is formed are not so sharply bent as in t e ring shown in Fig. 5; but the degree of convexlty and concavity of the outer and inner coils d and e also decreases as the central coil f is approached, the latter having two convex surfaces. This formation of the ring is preferably produced by means of powerful axial pressure after the flat strips have been wound, the said pressure being, for example, exerted by means of a press.

The lon itudinal bending, channeling, or grooving of the stri s by means of axial pressure exerted on tfie wound ring produces very intimate interconnection of the coils and great stren th is imparted to the ring, more articular y if the arrangement is so madet at thefiber, grain, or thelike of the material runs in the longitudinal direction of the strips, so that the greatest possible amount of tensile strength is o posed to steam-pressure or the like to whic the ring is subjected. The passage of steam or other fluid between the coils is effectually prevented by the improved arrangement even in the case of large-rings such as those placed around manhole-doors and the like. If desired, the strips of material can be suitably impregnated before being wound, or the rings can be sheathed in a suitable manner after the strips have been wound. Neither of these 0 erations is novel in connection with pac (ingrings.

What is claimed as the invention, and de sired to be secured by Letters Patent of the United States, is

1. A packing-ring consisting of s irallywound strips of flexible material; eac winding of the strips being provided with projections engaging with corresponding recesses in the adjacent winding.

2. A packing-ring consisting of s irally wound strips of flexlble material; eac winding of the strips being provided with a lon itudinal projection extending throughout t e winding and engaging with a corresponding longitudinal recess in the adjacent winding.

3. A packing-ring consisting of spirallywound strips; each winding of the strips being concave-convex and the concave portion of each winding engaging with the convex portion of the adjacent winding.

The foregoing s ecification signed at Berlin this 15th day 0 December, 1905.

EMMA AMALIE KIRSCHNING, Admtnistmtriw 0 the estate of Hermann Kirschmlng, eceased. In presence of WOLDEMAR HAUBT, HENRY HASBER.

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