US300653A - Ietailic packing for piston and valve rods - Google Patents

Description

(No Model.) -3 She'ts-Sheet 1.. G. T. SLEEPER.

} METALLIC PACKING FOR PISTON AND VALVEBODS. No. 300,653. Patented June 17,1884.

(No Model.) A 3 Sheets-Sheet 2.

G. T. SLEEPER. I

' METALLIC PACKING FOR PISTON AND VALVE RODS.

No. 300,653. Patented June 17, 1884 EIIH .Wum

& L0 9 e h s m Av e h S 3 R E P E E L S T U (No Model.)

METALLIC PAGKING FOR PISTON AND VALVE RODS.-

Patented June- 17', 1884.

e J 0 o UNITED STATES PATENT CEEicE.

CHARLES T. SLEEPER, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 300,653, dated June 17, 1884.

Application filed Febiuary 29, 1884. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES T. SLEEPER, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Metallic Packing for Piston and Valve Bods, &c.; and I do hereby declare the following to be a full, clear, and exact description of the inventiomsueh as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to an improvement in metallic packing for piston and valve rods, 820.

The object of the invention is to provide a metallic packing that shall be complete in itself, and adapted to be applied to a piston or valve rod 011 the outside of the ordinary stuffing-box, whereby it may be relied on as the sole means for packing the rod, or may be used in conjunction with and supplemental to an ordinary stuffing-box packing. A further object is to provide ametallic packing that shallbeindependent of the stuffing-box, and adapted to be self-adjustable laterally, and thereby retained in perfect alignment with the moving rod, and thus cause the packing to be subj ected to even and uniform wear. A further object is to provide a metallic packing with devices for readily expanding and contracting the packing-rings to insure their fitting the rod in a steam-tight manner, and yet prevent both the rod and packing-rings from being subjected to any undue friction or wear. A

, further object is to provide sectional metallic packing-rill gs with overlapping joints, as will be hereinafter described, for preventing the escape of steam past the rings.

WVith these ends in view my invention consists in certain features of construction and combinations of parts, as will hereinafter be described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation of my improved metallic packing. Fig. 2 is a similar view with one of the rings removed to show the packing rings. Fig. 3 is a vertical section. Fig. 4 is a detached view in perspective of the camring and the follower. Fig. 5 is a detached plan view of one of the packingrings. Fig. 6 is an edge view of the packingring. Fig. 7 is a view in perspective of one section of the packing-ring. Fig. Sis a transversescction of a stuffing-box having my improvement applied thereto, and Fig. 9 is a plan view of the packing applied to a stuffing-box.

A represents a casing or box, consisting of 5 5 the two sections at a, which are provided with lugs I), through which rivets or screws b are inserted for securing the two parts of the easing together. Sections a a are constructed with inwardlyprojecting flanges b thereby forming an internal annular groove, If. Within the groove b is-seated the cam-ring B, the

periphery of which is provided with a segmental worm-gear, C, with which engages the worm C on the shaft C the latter being journaled in bearings c 0, formed in a projection, c on the sections of the casing. One end of the shaft C is provided with a handle, 0 for turning the shaft. By means of the worm and worm-gear the cam-ring may be turned in either direction and be retained against accidental displacement. Cam-ring B is provided with four cam-surfaces, D, each of which constitutes one-quarter of the circumference of the cam-ring. The casing or box A is slotted at d for the reception of the arms 6 e on each one of the followers F, said arms being constructed and arranged to move radially through or within the casing. Each follower is provided with an arc-shaped plate,- F. The cams D are each constructed with a groove, f, on its side, into which is received a lug, f, that projects from the inner side of one of the arms on-the follower. When the cam-ring is rotated in one direction, the cams engage the cross-bars g on the follower and gradually force the follower inwardly toward the center of the casing. \Vhen the cam-ring is rotated in the opposite direction, the followers are forced or drawn outwardly by the engagements of the lugsf in the groovesfin the sides of thecams.

WVithin the interior of the box or casing A are located the two sectional packing-rings H, each one consisting of the two sections h 71.. Each section is made with the ends reduced in width at t i, which reduced ends enter the interior recesses, i in the opposite section. The peripheries of the sections are cut away at P, so as to form overlapping joints i on the periphery. Thus it will be observed that when the two sections are interlocked or joined they will form overlapping joints j j, which will effectually prevent the escape of steam, and yet allow the sections to be contracted in diameter to compensate for wear. These rings are made of any metal or alloy suitable for the purpose of' a metallic packing. Encircling the packing-rings are thetwo semicircular bands J J, which fit against the rings, and receive the pressure exerted by the followers to compress the rings. These bands may be made of steel or any hard metal, and prevent the followers becoming embedded in the rings, and thereby insure the free operation of the latter; but, if deemed advisable these bands may be dispensed with. Annular rings K K, of slightly less diameter than the inner diameter of the box or casing A, are placed on the outer face or surfaces of the packing-rings to serve as hearings or seats. My improved packing may be secured in the manner illustrated in Fig. 8. The casing is seated against the end of the gland L of the stuffingbox L, the ring K resting against the gland and constituting a seat for the casing, with its contained packing.

M represents the studs of the stufiing-box, which extend through the face-plate N, having a flange, n, that rests upon the end of the stuifing-box, thereby forming an interior receptacle for the casing A. The face-plate is.

secured in place by the nuts m, screwed onto the outer ends of the studs M. A nut, 0, encircles the piston-rod P, and is screwed into the face-plate, the inner end of the nut engaging the ring K on the outer side of the packing. By regulating the adjustment of the nut O the packing may be retained in snug contact with the end of the gland, and thereby be prevented from moving with the piston-rod, and yet be allowed a free lateral movement, so as to be self-adjustable, and be retained in perfect adjustment with the piston-rod. The nut O is provided with a socket, 0, inits side, into which is received the end 0 of the spring the opposite end of which is bent downwardly, as at q. The face-plate is provided with a series of holes or sockets, q. When the nut is properly adjusted, the end (1 of the spring is inserted in one of the holes'q in the face-plate, and thus the nut is prevented from becoming displaced; and, further, the nut automatically takes up any wear in the face-plate or gland or annular rings seated against the packing. The spring Q constantly tends to rotate the nut and force it against the ring K. The continued use of the packing will result in wear of the faceplate, rings K K, or outer surface of the gland, owing to the lateral adjustment of the packing while in use; and in order to preserve a steam-tight joint between the packing and the gland or cylinder under all circumstances I have provided the spring Q, which acts on the nut in the manner stated. I do not limit myself to this particular device for accomplishing this result, as other constructions and arrangement of parts might be employed for this purpose.

From the foregoing it will be observed that the improved packing may be readily applied when the ordinary stuffing-boxes are employed and without necessitating the removal of or any change being made in the stufling-boxes, so that comparatively little expense is incurred in the application of the improved packing. As the adjusting-shaft is located outside of the stufiingbox, the packing may be readily and quickly contracted in diameter to compensate for any wear, and thereby insure a steamtight joint. This packing has advantages not possessed by that type wherein steam or spring pressure is resorted to for setting the packing, as it serves to pack the rod, irrespective of the direction in which pressure is exerted, while in the type referred to the packing will be operative only when the pressure is outward or in one direction. Again, it has another advantage over the steam or spring actuated packing, in that the rings are mechanically adjusted so as to preserve a uniform and even contact with the moving rod, and thus obviate any undue wear or friction, while in that type of packing wherein the rings are set by steam or spring pressure the force exerted on the rings is oftentimes sufficiently powerful to bind the rings upon the rod with such force as to rapidly cut away and destroy the rings. By turning the worm-shaft the cam-ring is rotated, and operates to force the followers inwardly, and thereby subject the outer peripheries of the packing-rings to a uniform and even inward pressure, and thereby contract their inner diameter sufliciently to cause them to snugly engage the piston-rod and form a steam-tight joint there with. New packing-rings may be readily inserted without removing the casing fromthe rod, it being simply necessary to loosen the nuts retaining the face-plate in place and move the face-plate on the rod asuflicient distance to allow of the disengagement of the ring seated over the side of the packing-ring. The old rings may be then removed and new ones replaced.

Instead of making the different parts in the manner shown and described, they may be made in half-sections, to enable them to be applied to therod without disconnecting the latter.

While I have shown and described one form of packing embodying myinvention, I do not restrict myself to the exact construction and arrangement of parts shown and described, as it is evident that many slight changes in the construction and arrangement of parts might be resorted to without departing from the spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a metallic packing, the combination, with a casing or box and sectional metallic packing-rings located therein, of followers engaging the rings at different points on their peripheries, and means, .substantially as descr1bed, for imparting simultaneous movement IIO 300,653 I I s with a casing or box and metallic packingrings located therein, of radially-adjustable followers, a cam-ring for actuating said followers, and worm-gearing for rotating the camring, substantially as set forth.

4. In a metallic packing, the combination,

with a casing or box and metallic packing- 7 rings located therein, of radially-adjustable followers and means, substantially as described, for positively and simultaneously moving said followers either inwardly or outwardly, substantially as set forth.

5. In a metallic packing, the combination, with a box or casing and metallic rings located therein, of radially-adj ustable followers, bands interposed between the followers and packingrings, and a cam-ring for actuating said followers, substantially as set forth.

6. In a metallic packing, the combination, with a box or casing and metallic packingrings located therein, of radially-adjustable followers and a cam-ring, said followers and cam-ring being connected by lugs and grooves, substantially as set forth.

7. In a metallic packing, a box or casing made in two sections, in combination with a cam-ring seated in an annular groove formed on the interior of said sections, substantially as set forth. 1

8. In a metallic packing, the combination, with a box or casing and a cam-ring seated in an annular groove formed within the casing, said ring being provided with a segmental worm-gear, of a worm-shaft journaled in bearings formed in a projection formed on the box or casing, substantially as set forth.

9. In a metallic packing, the combination, with a box or casing and' sectional packingrings located therein, of followers engaging the packing-rings atdifferent points for contracting the packing, and annular ring-bearings seatedagainst the outer face of the packing-rings, substantially as set forth.

10. The combination, with a stuffing-box, a

box or casing containing adjustable packingrings, and followers engaging the rings at different points, of an annular ring-bearing seated against the gland of the stuffing-box, and a face-plate for retaining the casing in place, substantially as set forth.

11. A sectional metallic packing-ring for piston andvalve rods, and adapted to be contracted in size to compensate for wear, the ends of the sections being formed with double overlapping joints on the sides and periphery of the ring, each section of the ring comprising more than a half-circle, substantially as set forth.

12. The combination, with a stuffing-box, of a casing provided with metallic packing, and a face-plate for retaining the casing between the stuffing-box and face-plate, substantially as set forth.

13. The combination, with a stuffing-box and a box or casing containing adjustable metallic packing-rings, the latter engaging the rod outside of the stuffing-box, of a face-plate and a nut for retaining the box or casing in place, substantially as set forth.

14. The combination, with a stuffing -box and a laterally-adjustable casing containing metallic packing-rings seated against the end of the gland of the stuffing-box, of a faceplate and a nut for retaining the packing rings against displacement, substantially as set forth.

15. The combination, with a rod, of a detachable casing or box provided with adjustable metallic packing, and means, substantially as described, for allowing the packing a self-lateral adjustment, and for preventing it from moving in the direction of the movement of the rod, substantially as set forth.

16. The combination, with a box or casingprovided with adjustable packing, of a device, substantially as described, for automatically compensating for wear of the bearings between the packing. and the gland or cylinder, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES T. SLEEPER.

Witnesses:

GEO. F. DowNINe, S. G. NOTTINGHAM.

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