US924789A - Packing device for pistons, piston-valves, and the like. - Google Patents

Description

J. JONES & J. RIGG.

PACKING DEVICE FOR PISTONS, PISTON VALVES, AND THE LIKE.

APPLICATION FILED DEO.14,1908.

Patented June 15, 1909.

- 4 SHEETS-SHEET 1.

Walla/03W. A/Z/ J. JONES & J. RIGG. PACKING DEVICE FOR PISTONS, PISTON VALVES, AND THE LIKE.

APPLIQATION FILED DEO.14,1908.

924,789. Patented June 15,1909.

4 SHEETS-SHEET 2.

J. JONES & J. RIGG PACKING DEVICE FOR PISTONS, PISTON VALVES, AND THE LIKE.

I APPLIOATION FILED DEG. 14,}908. 9g4,739 Patented June 15, 1909.

4 sums-sum a.

J. JONES & J. .RIGG.

, PISTON VALVES, AND THE LIKE.

APPLIOATIONFILBD DEG.14,1908.

PACKING DEVICE FOR PISTONS Patented June 15, 1909.

4 SHEETSSHEBT 4.

,- exerted by one .or more springs,

Warren j l i fi PATENT orifice,

JOHN JONES, OF LITTLEBORUUHI-I, AND JESSE HIGG, OF R( )Ulll )i\l,l1, ENGLAND.

PACKING DEVICE FOR PISTONS,

Application filed December 14, 1908.

To all whom it may concern:

Be it known that we, JOHN JONEs and Jesse Rice, subjects of the King of Great Britain and Ireland, and'residents oi Littleborough and Rochdale, respectively, both in the county of Lancaster, England, consulting engineer and engineer and maker, have invented certain new and useful Improvements in Packing Devices for Pistons, Piston-Valves, and the Like, of which the following is a specification.

This invention relates to improved means for enabling the pistons of steam or other engines, pumps and the like, to be kept steam or liquirbtight in the cylinders or barrels in which they work, the invention being equally applicable to piston valves and, in fact, to pistons of any kind.

It refers to that class of device chiefly consisting of inner and outer ringsegmentsbearing against each other as a result of pressure the object being to provide an improvedarrangement of spring device for usein conjunction with the inner segments.

In the hereinbel'ore mentioned application for Letters Patent filed by us we described a combination of separated inner segment rings operating in conjunction with outer segment rings or packing ringsha-ving tenon joints, certain spring devices and screws being employed in connection with such to l'orni the complete packing arrangement.

Our invention particularly-relates to this class of device and will be fully described with reference to the accompanying drawings in which,

Figure 1 is a plan of structed in accordance with our present invention, Fig. 2 side elevation of same, Fig. 3 partial sectional side elevation, Fig. 4 partial plan showing a slightly modified arrangement, Fig. 5 side elevation showing the slide device hereinafter referred to for carrying the springs, Fig. 6 plan showing a modified arrangement, Fig. 7 side elevation of same, Fig. 8 partial elevation of same and Figs. 9 and 10 plan and elevation of a further modification.

In the foregoingdrawings similar letters indicate corresponding parts and from these it will be seen that-our invention consists in providing each end of the inner segment rings a with suitable slideways I). These may be formed so as to give a channel section in plan or may be arranged to have an Specification o Letters Patent' maohinea piston packing 'con-' PISTON-VALVES, AND THE LIKE.

Patented June 15, 1909.

Serial No. 467,393.

outstanding projection or projections, preferably of a parallel character, though, in end elevation, the sides c of the channel or the projection or projections may converge so as to present a wedge-shaped groove or a wedgeshapedprojection or projections. in conjunction with slide-ways or projections so formed we employ spring pressure devices adapted to be easily slid 'nto and out of posi tion between the ends of the segments, such devices consisting of brackets (1 adapted to iit one within the other with their ends 6 formed to fit in or on the slideways or projections formed in the segments.

The parts of the bracket which slide one within the other preferably consist of two ternal diameter corresponding to the diameter of those on the other bracket. The tubes on the latter may, however, be replaced by solid pins of the same external Mounted on the external or larger tubes, of which there are two pairs in connection with each pressure device and in large pistons sometimesniore' than two, are spiral springs 9 adapted to exert pressure endwise sons to force the brackets d against the segments and thereby put pressure onthe outer ring or packing segments h which come directly in contact with the cylinder wall in which the piston works. By employing two or more sets of springs between each of the inner segment joints, equalpressure is given to the packing ring-silt, transversely oi them, so as to keep them in perfect alinement with the cylinder wall.

i indicates bolts or studs preferably the former, passed through both the outer and inner segments and j are nuts adapted to keep the two segments together at or about centrally between the tenon joints .k such as were previously described in our former patent.

In the partial plan shown in Fig. 4 we ar-- range along the front side of the spring device a plate m adapted to fit in additional grooves a formed in the ends of the segments a. The plate has a sliding fit in the grooves so as n t to restrict the circumferential movement toward or from each other of the segments. This plate is for the purpose of entirely covering t 1e joint between each two sections of j segments and so render them -more completely steam or liquid tight. The arran ej ment of segments just described and t e method of oining them enables the outer diameter.

tubes f, those on one bracket having an inrings 72 to be entirely dispensed with as in Fig. 4. v

In Figs. 6 to 8 a modification of the same idea is illustrated. faces of each pair of segments where they join together are formed flat at 0 and against this flat surface is secured a bracket 1), a stud or bolt 9 being employed for the purpose, such stud being passed through the end of one of the oining segments only. One end of the bracket 1) has a slidable lit in a groove 7* formed in the segment while 'the other end of the bracket has formed in it a groove or slideway b or is provided with a projection of a similar character to those already described. The spring devices employed in connection with this form. of packmg are exactly thesame as those previously place of the plate at shown in Fig. 4.

'-In the modification illustrated in Figs. 9 and 10 the outer segment rings h are dispensed with. Like letters indicate similar parts to those in the other views In this case two sets of segments a are employed forming two complete rings, one upon the .to that of the piston rod.

. and junk ring,

shape other. The several oints of each ring are arranged to overlap those of the others on their plane faces but-otherwise their construction is similar to that'in Fig. 4, as is also this arrangement of plates at and springs g. In addition to the latter, pins or projections s are formed on the segments to hold in position springs t, which have their axes parallel By these latter means the two sets of C01 iplete rings may be pressed toward theflangeon the piston block respectively. Further the inner segments in all cases may be of channel in transverse section so that the connecting Web or side which presses against the inner surface of the outer segments or against the cylinder wall may be made thinner, while strength is retained by the webs.

The arrangement of double spring pressure and segment devices hereinbefore described In this case the inner p takes the makes a most admirable packing device for j the purposes referred to exerting equaland constant pressure throughout the whole circumference and depth of the i packing rings against the internal wall of the cylinder in which the piston works and consequently equal wear of both working surfaces occurs. I We are aware that it has previously been i proposed in pistons to cmployT-shaped short I spindles having swiveling heads, the spindles telescoping into one another andsupporting on them a compression spring while t is heads bore against lugs on an inner expansion ring bearing against the outer or packing rings. One telescoping spindle only' vith its spring was employed opposite each joint of the expanding ring. I/Ve do not claim anysuch arrangement.'

What we claim as our invention and desire to secure by Letters Patent is 1 The combination, with piston segments provided with sockets on their adjacent end portions, of telescopic guides provided with brackets at their ends which are slidable in which is capable of j the said sockets, and springs encircling the said guides and pressing the said brackets apart. i

2. The combination, with piston segments 1 provided with sockets on their adjacentend i portions, of telescopic guides provided with brackets at their ends which are slidable in the said sockets, plates overlapping the joints of the said segments and bearing against each pair of brackets, and springs encircling the said guides and pressing the said ,I brackets apart.

In testimony whereof we have hereunto set our hands in the presence of two witnesse's.

JOHN JONES. J. RIGG.

I Witnesses AMY. E. EV INS, l J GREAVES.

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