US101840A - Improvement in piston-rod packing - Google Patents

Description

N. PETERS. PHUTO-UYHOGRAPNER, WASHINGTON. D

naar sara @anni (119mm.

Latem Patent No. 101,540,y dma .41ml 12, 1810.

M IMPRovnMENT m Prerow-Ron PACKING.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known thatwe, PETER Eomonn and J Arms ECKFORD, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and useful improved Metallic Packing; and Wedo hereby declare that the following is a full, clear, and ,exact description of the construction and operation of the same, reference being had to the annexed drawings making part of this specification, 'in \vhich-" Figure 1 is an axial section of a cylinder-head-packing-case and stuihng-box, showing our improved packlng.

Figure 2 is a perspective view of the different parts of the packing, together with the case for -holding'it.

V Figure 3 is a perspective view of a modification of our invention hereafter described. A A, g. 1, is the cylinder-head.

B, piston-rod. C C', the packing-case.

a. w a a are metallic segmental packing. D D' are rings, formed respectively of segments a laaandaa, a.

b, an annular brass spring; c, an annular steel spring; and ad, an ordinary gland. v

The segmentsa-tt a and a' a a are all 'constructed of the same form and siz'e, and when in place1 forming two rings around the piston-rod, constructed to t' closely together, and so arranged with respect to each other as that the; segments forming the respective rings will not bein a right line, but overlapping or breaking'joints, as shown in fig. 2. The objectiof this overlapping -or breaking of thejoints is the prevention of the escape of steam. The annular brass spring band b is placed'around the rings DD', and is made of `a width greater than the two rings, D 1).', so that the edges of this' band, when in place, project soinewhat as shown at ff,'ig. -l, andis of a width equal to vthe space between the inner faces of the two parts of the packing'case C C', whenin position. Around this brass .band is placed the'an'nular steel spring band c, which is made 'of less `'width than'the band d, and the spring of which is so set as to press the segments of the rings D D firmly to the ,piston-rod, as shown ing. 1, andas the inner surfaces of these segments are wom away bythe friction ofthe piston-rod, this spring still keeps themA rmlypressed to the piston-rod, vand thus prevents the wear on the segments from opening a passage for the steam.

We construct O with an annular recess, into which l(D fits, as shown at g g', iig. 1. These parts are ground so as to form a steam-tight joint.

O, iig. l, is constructed with an annular projection,

' fitting into a countersink in the cylinder-head, as shown in iig. 1, and ground so as to form a steam-tight joint.

The gland d, in addition to its usual function, holds the dierent parts of' the packingcase firmly in their v places in the stuffing-box.

The modificationv of our invention shown -in Iig. 3, and which we regard as the better modeV of carrying it out, is composed .of a segmental ring, L, a ,pieceof which appears to bel out away for the better exhibition of its interior, which has an interior permanent projection, N, onits center, extending around it, and

two series of movable segments, M and M', at either side, respectively, of the jpermanent projection; the segments M, N, and M' being of course of the same depth and breaking joints as shown.

The advantage of'this arrangement of the `segments consist-s in 'the fact that there vis less liability for the escape of steam. Over" this, and for the purpose of compressing the segments to the piston-rod, but one annular spring, P, is shown, which 'is made of steel; the edges of the ring L answering the purpose -that the edges of the ring b answer iu the arrangement first described.

The segmental rings 'above described are made of brass, and each ring composedof three segments.

It is clear, however,'that two or more segments' may be used yin each' ring,'and. that other metals may bevused. instead of brass, but the number of segments shown and described, together withthe kind of metal described, we consider preferable. And although our inventionhas been' described with reference to the stuffing-box of a cyliuderheadyet there are other uses to which it may be applied, which will suggest themselves to any mechanic.

Having thus described ourinvention, wedo not claim segmental packing simply, nor Ado we claim seg-` mental packing Wher'e the same is kept in position around the piston-rod or other spindle by the actionv vof steam; but

What we claim as new, 'and desire to secure by Letters latent, is l 1. In combination, the segmental rings D and D', inclosingring oi""soft metal, and spring c, when said spring is used to bind; the segmental rings to the spindie, without the action of the steam, substantially as shown and described.:

2. The packing-case, composed of the parts O and C', fitted between the cylinder-head and gland, in the manner. shown, in combination with the segmental packing and inclosing-rings, when the same is constructed as shown, to prevent the ingress of steam to the stuing-box.

PETER' ECKFORD. JAMES ECKFORD.

Witnesses: p

JAMns MOORE, M. W. OLIVER.

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