US561794A

US561794A - Metallic rod-packing

Info

Publication number: US561794A
Authority: US
Publication date: 1896-06-09
Anticipated expiration: 1913-06-09

Description

(No Model.)

J. KELLEY.

METALLIC ROD PACKING. No. 561,794. Patented June 9, 1896.

a J/ I .7 110 13 ii 1 i ANDRQIVI 5.6MHAM.PHOTOUTHUYVASHCNGTOHJC UNITED STATES PATENT OEEicE.

JOHN KELLEY, or EAST sr. LOUIS, ILLINOIS.

METALLIC ROD-PACKlNG.

SPECIFICATION forming part of Letters Patent No. 561 ,7'94, dated June 9, 1896. Application filed June 17, 1895. Serial No. 553,040. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN KELLEY, of the city of East St. Louis, St; Clair county, State of Illinois, have invented certain new and useful Improvements in Metallic Rod-Packing, of which the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming a part hereof.

My invention relates to an improved metallic rod-packing; and it consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

In the drawings, Figure 1 is a longitudinal sectional view of a piston-rod stuffing-box, the same having my improved packing applied thereto. Fig. 2 is an edge elevation of one of the expansible rings of which I make use in carrying out my invention. Fig. 3 is a top plan view thereof. Fig. 4 is a horizoir tal sectional view taken approximately on the indicated line at 4c of Fig. 2.

Referring by numerals to the accompanying drawings, 1 indicates an ordinary stutting-box, through which the piston-rod 2 reciproca-tes, and said stuffing-box is provided with the usual gland 3, the same being held to the stuffing-bon by bolts 4:. The annular space between the end of the gland 3 and the head of the engine or pump cylinder within the stuffing-box 1 is occupied by myimproved metallic packing, and said packing, as shown, comprises an annular casin g 5, having an open end, and the inner face of said annular casing, adjacent said open end, is screw-threaded, as indicated by 6. The opposite end of said casing is closed, with the exception of an aperture '7 of the same diameter as is the aperture through the head of the engine or pump cylinder through which the piston-rod passes. This casing 5 is intended to be located directly again st the head of the pump-cylinder, and a soft metallic ring 8 is located in the outer edge of the face of said casing 5.

9 indicates a second casing having an open end int-eriorly screw threaded, as indicated by 10, and provided on its opposite end with a head 11, through which is formed an aperture 12 of the same diameter as is the aperture '7 in the casing 5. Said head 11 is provided with a projecting portion 13, that is exteriorly screw-threaded, and the diameter of said projecting portion 13 is such that it may be readily screwed into the open end of the casing 5, the screw-threads on said projecting portion 13 engaging in the screwthreads 6 in said casing 5. There may be a series of these casings 9, it only being essential to partially fill the stuffing-box 1; but I find that one of the casings 5 and one of the casings 9 are sufficient in the stoning-boxes ordinarily located upon engine and pump cylinders.

14: indicates an annular cap-plate provided with a centrally-arranged aperture 15, and also provided with an exteriorlyscrewthreaded head 16, that is of such a diameter as that it will readily pass into the screw threaded end of the casing 9.

The metallic packing-rings comprise segments 17, but slightly less than true semicircles, and said rings are slightly less in diameter than are the interior diameters of the casings 5 and 9. Formed in the peripheries of the segments comprising these rings are grooves 18, the same being semicircular in crosssection.

Formed in the bodies of the segments 17 and extending inwardly from the grooves 18 and at points on the segments opposite one another are recesses 19.

Springs 20 comprise single lengths of resilient metallic wire bent into semicircular form in order to fit in the semicircular grooves 18. The ends of these springs 20 are bent inwardly toward one another, and said ends engage in the recesses 19, formed in the segments 1?. The normal tendency of these springs 20 is to force the ends of the segments 17 against one another, thereby slightly decreasing the diameters of the apertures through the rings.

Formed in the meeting ends of the segments 17 and directly opposite one another are rectangular recesses 21, in which are located plates 22. It is intended that there be a pair of these rings located in each one of the casings 5 and 9. To break joints between the ends of the segments forming the pairs of rings and to cause each pair oi rings to move together,in one ring of each pairI locate a dowelpin 23, and in the mating ring of the pair is ness as that when in pairs they are located in t the casings they will completely occupy the spaces between the ends of said casings and the ends of the opposite casings or cap.

The casings are made in sections in order that they may be easily applied to or removed from the rods and stuffing-boxes without necessitating the detaching of the rod from the cross-head.

The casings with their rings occupying the space within the stuffing-box do not take up any more room than is ordinarily occupied by the paekings now in use.

hen the casings containing the rings are located within the stufiing-box and upon the piston-rod and said piston-rod is reciprocated, the tendency of the springs 20 is to force the meeting ends of the segments of the rings toward one another, thereby causing the inner faces of said rings to engage very tightly upon the surface of the piston-rod. As there are a series of these rings, any direct blowing through or leakage of steam between said rings and the piston-rod is impossible. A certain amount of steam will necessarily pass between the ring nearest the head of the cylinder and the inner wall of each casing to the space between the peripheries of the first series of rings and the inner face of the first casing; but said steam will be prevented from further escape by reason of the plates 22 cutting off its passage into whatever space there might be between the first set of rings and the piston-rod.

By constructing the segments 17 of the rings of suitable material the use and necessity of lubricating substances are dispensed with.

Thus will be seen how I have constructed a metallic rod-packin g that is perfectly water and steam tight, is easily and quickly placed in or removed from position, is very compact. and is extremely durable and effieient.

I claim- The combination, with the stuffing-box l, of metallic packing for piston-rods comprising the annular casing 5 having the interiorly-screw-threaded end (5 and the aperture 7 in the opposite end, said casingbeingloeated directly against the head of the cylinder, the soft metallic ring 8 the body of which is square or rectangular in cross-section located in the outer edge of the face of said casing 5 and arranged and designed to be pressed into the corner formed by the juncture of the wall of the stuffing-box with the head of the said cylinder, the casin g 9 having the interiorly-scrcwthreaded end 10 and provided on its opposite end with the head 11, said head having the aperture 12 and the projecting portion 13 which is exteriorly screw-threaded for insertion in the open end of the casing 5, the annular cap-plate 1%, having the aperture 15 and the exteriorly-screw-threaded head 16 for insertion into the screw-threaded end of the casing 9, the metallic packing-rings consisting of the segments 17 having the grooves 18 which are semicircular in cross-section and the recesses 19 at points on said segments op posite one. another, the springs 20 consisting of resilient metallic wire bent into semicircular form to fit in the semicircular grooves 18 and having the ends bent inwardly toward one another said ends to engage in the recesses 19, the plates 22 located in the rectangular recesses 21 formed in the meeting ends of the segments 17,the dowel-pins 23 fixed in one of said metallic rings to engage in recesses 24: in the mating ring, the object being to break joints between the said rings which are arranged side by side to fill said casing 5. substantially as andfor the purposes stated.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN KELLEY.

YVitnesses EDWARD E. LONGAN, MAUD GRIFFIN.