US 1927477 A
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p 1933- J. N. WALTON 1,927,477
MACHINERY PACKING Filed June 29, 1929 Wyn r0? WITNESS l [ya a E (/Zl (all/VX 147 IZ.
Patented Sept. 19, 1933 UNITED: STATES PATENT OFFICE MACHINERY PACKING Julian N. Walton, Brooklyn, N. Y., assignor to The Anchor Packing Company, Philadelphia, Pa., a corporation of New Jersey Application June 29, 1929. Serial No. 374,927
My invention relates to machinery packing and more particularly to a packing involving a fibrous core enclosed in a metal covering.
Heretofore machinery packing comprising fibre covered with metal has been known but such packing has in all cases been of limited use due principally to a lack of requisite flexibility to enable its use in glands of relatively small diameter without destructive distortion.
Now, in accordance with my invention I pro-' contains a powdered lubricant, as graphite, with-.
in the metallic cover and. the fibrous core is desirably lubricated, as with oil, before it is covered.
The packing embodying my invention in its simplest form involves a strand composed of a core and the twisted metallic cover, but it will be understood that similar strands may be braidedor twisted together in various ways for the production of larger strands which in turn may be twisted or braided together to form still larger strands; and. it will be understood that the simple single strand or twisted or braided strands may be formed into rings of various sizes which may be compressed if desired.
Having now indicated in a general way the nature and purpose of my invention, I will proceed to a detailed description of a preferred embodiment thereof with reference to the accompanying drawing in which:
Fig. 1 is a view showing a strand of packing embodying my invention, the strand being opened out adjacent one end to disclose its component parts.
Fig. 2 is a view of a strand of packing composed of a plurality of strands, such as are shown in Fig. 1, twisted together.
Fig. 3 is a view of a strand of packing composed of a plurality of strands, such as are shown in Fig. 2, braided together.
Fig. 4 is a plan view of a packing ring formed from the strand shown in Fig. 3.
Referring more particularly to Fig. 1, the packing in accordance with my invention comprises a fibrous core A, as a strand or the like, composed of asbestos, flax, hemp, or the like, and a metallic cover B, as for example, a strip of tin, aluminum or other metallic foil.
The core A may be saturated with or coated with a lubricant, as, for example, petroleum oil or grease, though it will be understood that such is not essential to my invention, and desirably there is included within the cover B a lubricant C, as for example, powdered graphite, graphite admixed with oil, a grease, or the like.
In the production of the packing, embodying my invention, the core and cover, with a lubricant if used,'are associated in parallelism as shown in Fig. 1 and the core and cover twisted together so that the cover becomes twisted about the core, as for example, by rolling upon a spool which is bodily rotated on an axis at right angles to its own axis of rotation, as described and claimed in an application for United States Letters Patent filed by me for improvement in process. and apparatus for manufacturing packing, filed June 29, 1929, Serial No. 374,926.
In the twisting of the cover B about the core A, as described, the cover becomes spiralled about:
the core, while at the same time fully enveloping it and, due to the fact that the strip forming the cover is of very substantially greater width than is the core, the cover is, due to the twisting, in effect crowded lengthwise, as shown in the twisted strand D, Fig. 1. As a result of the spiralling of the cover about the core and the endwise' crowding, any given length of core is covered by a greater length of cover with the result that the strand produced is flexible to a high degree and when flexed as in the formation of a packing ring will accommodate itself nicely to a gland.
Referring now to Figs. 2-4, it will be noted that the, strand E comprises four of the strands D twisted together, while the strand F is composed of four of the strands E braided together. The ring G is formed from the strand F and subjected to compression to consolidate the strands E of which it is composed.
The several developments shown in Figs. 2-4 of the packing strand shown in Fig. 1 partake of the advantages of the strand D and it will be appreciated that the strand Dis usable alone, or
as it may be formed into rings, if desired sub-i jected to compression, or as it may be developed along the lines indicated for purposes of illustration in Figs. 2-4, or otherwise.
It will be understood that the packing in accordance with my invention is usable for a wide spiralled about the core and crowded lengthwise relatively thereto.
2. A machinery packing including a plurality of strands braided together, each of said strands comprising a plurality of component strands twisted together, each component strand comprising a fibrous core and a metallic foil cover spiralled about the core and crowded lengthwise relatively thereto.
JULIAN N. WALTON.