US1653439A - Packing - Google Patents

Description

F. E. PAYNE Dec. 20, 1927.

PACKING Filed Feb. 8, 1925 Tall. .filiali fr/MIM 25 packmg;

Patented Dec. 2o, 1927.

IUNITED STATES l 1,653,439- PATENT OFFICE.

., FRANK E. PAYNE, OF CHICAGO, ILLINOIS, ASSIGNOR TO CRANE PACKING' COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

'l PACKING.

Application illed February 8, 1923. Serial No. 617,722.

. My invention relates to improvementsin packing, such as is used in connection with steam engines, air compressors, and pumps for fluids of various kinds.

The object of the invention is to provide an improved packing reinforced by a metal wearing face, such as lead or its alloys, but

constructed so as to be flexible, i. e., easily bent to conform to the contour of the rod which it surrounds and capable of being deformed to insure a tight t in the stuffing box. A further object is to provide a packing of this character in which the metallic wearing face is held t0 the body of the packing by side flanges' which notched to permit bending. An additional object is to provide a yielding backing, whereby the wearing face is pressed against the reclprocating or rotating rod as it wears away. x

In the accompanying drawings, I have illustrated several embodiments of my invention. V Fig. 1 is a cross-section 0f one form of Fig. 2 is a side elevation of a short length thereof;

Fig. 3 is a plan of a strip of lead as it appears before being bent to the shape of a channel to form part of the acking;

Fig. 4 is a modified form o a'strip of lead fora similar purpose;

Fig. 5 is a section of a modified form of packing;

v Fig. 6 is a side elevation of a short length thereof;

Fig. 7 is a section of a further modification;

Fig. 8 is a side elevation thereof;

F-ig. 9 is a bottom view thereof;

Fig. 10 is a section of a further modification; and

Fi 11' illustrates, on la reduced scale a comp eted packing cut to a predetermined length and bent to form a ring.

Y Referring to Figs. 1, 2 and 3, the body of the packing'l may be either a metallic packing or a fabric packing such as duck, `rolled up and compressed to a rectangular crosssectional form. Where a metallic packing is used, I prefer to construct the same by helivcall winding a strip or ribbon of metal foil bac and forth upon itself to form a cylindrical lengtlf of packing, which is, thereafter run between rollers or otherwise are slotted or constitute the sides or flanges of the channel y member, as shown in dotted lines in Fig. 2. With this arrangement the packing may be readily bent. A

The structure, as thus far described, is thereafter partially surrounded by fabric, which in one form may be referredto as a channel member 4, consisting, for example,

of duck, rubber or asbestos fabrics, the base of the channel being comparatively thick to form a yielding cushion or resilient backing' for the body of the packing. The sides of the channel serve as an aid in holding the resilient backing to the main body of the packing and act as wipers on the rod or shaft. One method is to stitch said sides to said packing, a`lthough they'may be vulcanized thereto ortherwise secured, or the sides may be V'omitted lentirely.

The completed pack'ng 1s then cut to suitable lengths and may be bnt to any desired form, such as the ring shape shown-in Fig.

11, for example. In said figure the inner wearing surface is composed of sheet lead with the resilientl material von the -outside thereof. The packing is 4t-hus suitably renforced byy the lead, particularly on` the wearing face, but is not too stiff to prevent it from b ein kbent tothe form of rings.

When a num er of these rings are placed around a reciprocating rod or rotating shaft and compressed into a stuffing box, the soft metal surface bears directly against the rod or shaft. As -the surface wears away slightly, the yielding cushion behind the metal wearing facemaintains sufficiently inthe wearing surface of the packing, to avoid leakage. When the wear increases due to long continued use, tightening of the stuffing box recompresses the Vpacking and particu-V vtimate contact between the rod or shaft and I larly the fabric cushion atthe back thereof. y

In this arrangement the packing gland need not be tightened except at infrequent inter-- vals. After the sheet lead wearing surface wears away, the metal foil, where used, be-

comes the wearing surface ofthe packing.v

In Fig. 4 I have shown a further modificafion in which a sheet lead plate similar to the one shown in Fig. 3 is not only notched but is also provided with perforations 5, to render the packing somewhat more flexible andv to rovide receptacles for graphite or other lu ricating material. Y,

In Fig. 5 the body of the packing may comprise any'suitable packing material, suc as fabric cores v6. Each of these is. partially surrounded by an L-shaped sheet metal structure or angle structure 7. The soft metal angles are provided with slots 8 to facilitate `bending. A resilient fabric cushion 9 1s also provided, which may be similar to that shown in the previous figures, and the face of the soft metal angle sections may be perforated, as in Fig. 4.' v

In Fig. 7 the core ofthe packing 10 may be of any material, such as the cores in the two previously described forms of packing. The outer casing -consists of sheet metal 11, bent so as to completely surround the main body of the packing. blits I sides and continue along the bot-tom of the lead sheath, as shown in Figs. 8 and 9, where` by the `packing is rendered more fiexible, and thecentral part is held in place without the use of a fabric channel. The packing may, if desired, be provided with a resilient backing, as in Figs. 1 and 5.

In Fig. 10 aform of packing is shown, in which the central part 13 may be^ made ofany of the materials previously described,

this central core being surrounded by a' sheath of soft metal 14:, such as lead or'lead alloys. -The core and its lead sheath have a substantially dove-tailed engagement, whereby they are locked together. A backin of .fabric or asbestos 15 is also provided, w ich conforms to the shape of the lead sheathlso,

t er

that the'entire `packing' islocked toge without stitching.. Said parts may be vulcanized, to ensure against partial separation thereof in'bending the same. The face of the metal may be provided with perforations 16, similar to those previously described and for a similar purpose. Inthis form, with a suitable back clearance on the core, there is an automatic feeding forward of the wear- 12 are `cut in the -in surface when the gland pressure is applied, due to the wedge shape of the parts.

In the various forms ofthe packing shown herein the lead surface may be bent over and clinched in a ainst the packing or core without necessari y providing a channel having f sides long enough to fully receive said core.

I claim: 1. A packing comprising a body of flexible packing material, a sheet lead channel member enclosing the same, and a second channel tate bending, anda second channel inclosingl said first channel, said second channel hav-y ing a base of cushioning material.

3. A packing compr'islng a body of flexible ,Y 5

ackin material a sheet metal member having a ange at the side thereof, said flange having notches cut therein, and a fabrlc cushion on the side of said packing material opposite said sheet metal member.

4. A packing having a `metallic face and metallic sides having slits therein te permit bending, said packing having yielding material oppositepsaid face to provide a cushioning element, and packing material between said face and cushioning element.

5.' A packing comprising a body of flexible packing material, a wearing face of soft lsheet metal secured thereto, said sheet metal having openings therein, and lubricating material Within said openings.

`6. A acking comprising a body of flexibley materia, a' sheet metal strip partially inclosing the same, said strip having slits out in the sides thereof to faclitate bending, and' a fabricl base on the side of said flexible materialopposite said sheet metal strip,said base having side extensions to hold it in place.

7 A packing comprisinv' a metallic face having rearwardly extending portions, a resilient backing attachable to said portions and a iiexible packing material interposed between said face and backing.

In testimony whereof, I have subscribed:

my name.

FRANK E. PAYNE.

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