US772788A

US772788A - Metallic packing.

Info

Publication number: US772788A
Application number: US19218404A
Authority: US
Inventors: Brewster W Cribb
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-02-05
Filing date: 1904-02-05
Publication date: 1904-10-18
Anticipated expiration: 1921-10-18

Description

No. 772,788. I PATENTED 001*. Is, 1904.

I Brw. GRIBB. METALLIC PACKING.

- APPLIOATION FILED FEB.5, 1904.

N0 MODEL. "2 SHEETS-SHEET 2.

G V B.

' band therearound; Fig. 3, a side elevation of tral section, similar to'Fig. l, with the form of citizen of the United States, residing at Omaha, in the countyof Douglas and State of Nebraska,

. contact with the rod by the force of the exface of this gland-plate is provided with a cir- Patented October 18, 1904.

PATENT OFFICE.

BREWSTER w. CRIBB, or OMAHA, NEBRASKA.

METALLIC PACKING.

SPECIFICATION forming part of Letters Patent No. 772,788, dated October 18, 1904.

Application filed February 5, 1904.

To all whom it may concern:

Be it known that I, BRnwsTER W. CRIBB, a

have invented certain new and useful Improvements in Metallic Packing; and I do herebydeclare the following to be a full, clear, and exact-description of the invention, such as will enable others skilled in the art'to whichit appertains to make and use the same.

My invention relates to metallic. packings for reciprocating rods, and especially to that class wherein the packing is held in intimate pansive fluid therearound. v

The object of the invention is to provide a simple, cheap, durable, and effective metallic packing, and comprises a plurality of separable sections so constructed and arranged relatively to eachother as to be readily taken off or applied to the rod without disconnecting the rod itself.

To more fully disclose my invention, I will describe the same as applied to the cylinder of the ordinary type of steam-engine, and referring' now to the drawings illustrating the same, in which like letters designate the same parts in the several views, Figure 1 isa central section throughthe stufiing-box and glandplate, the piston and packing being shown in. elevation; Fig. 2, aside elevation of one of the sectional packing-rings with the retainingthe follower or joint ring; Fig. 4c, a plan view of the retaining-band for the sectional packingring; Fig. 5, a diagrammatic view illustrating the preferrednormal shape of the retainingband, the dottedlines indicating the position it assumes when secured around the packingrings; Fig. 6, aside elevation of the abutmentring; Fig. 7, a side elevation of another form of the follower or joint ring; and Fig. 8,a cenjoint-ring illustrated in Fig. 7 applied thereto.

A designates the stufiing-box on the cylinder-head, and B the piston-rod.

C is a plate used in lieu of the usual gland and which I term the "gland-plate. The inner Serial No. 192,184.. (No model.)

cumferential groove to receive therein acopper gasket D, adapted to be flattened against the outer face of the stuifing-box for forming a steam-tight joint between the gland-plate and stufling box. As illustrated, the gland-plate C will be detachably but securely fastened to the stuifing-box by suitable bolts or screws 0. The packing proper consists of oneor a plurality of rings E, formed of suitable metal, preferably hard Babbitt metal. These rings comprise a plurality of segmental members E, preferably of semicircular conformation, the ends of which are beveled to form a sliding joint when the rings are assembled. This beveled surface may be of any suitable disposition; but I prefer to cut away the ends of the rings, as illustrated in Fig. 2,'so that each sectional member of the ring is provided at one end with a concave bearing-surface and at its opposite end with a convex bearing-surface a, the said bearing-surfaces extending in an unobstructed manner transversely of the members, and the ends of the members are pro vided with the convex bearing-surface, being also cut away to form the rounded surface 0 so that the end. will not project over the peripheral surface of the packing-ring as the inner surface of the same is worn away by the reciprocating rod. These packing-rings are held from longitudinal displacement by the abutment-ring F and the joint-ring G.

The construction of the abutment-ring F is clearly shown in Fig. 6 andcomprises the sectional members F, the abutting ends of which are provided with flat faces F which prevent the members from closing in and bearing on the rod, as do the sections of the packing-ring.

The ring F is slightly greater in diameter than the packing-ringsxE', so as to form 'a projecting shoulder for maintaining the position of a retaining-band (hereinafter described) on the packing-rings. The sectional members F of the abutment-ring F are held in position in any suitable way, preferably, as shown, by a copper wire f, extending in a groove around the periphery thereof.

The joint-ring Gr comprises the sectional members Gr G the ends of one of said members, G, being slotted, as at to receive the tenon member formed on the other said section, and are held in their assembled position by the soft metallic rivets g.

The bore of the joint-ring G is slightly larger than the reciprocating red, as indicated by dotted lines in Fig. 1, and the outside diameter of said ring is slightly less than the bore of the stufiing-box, this construction being preferable to allow for any vibration of the reciprocating rod.

H represents retaining-bands adapted to extend around the periphery of the packingring and hold the same assembled when there is no steam in the chamber, it being understood that the intimate contact of the packing-rings with the reciprocating rod is caused by the pressure of the expansive fluid thereupon. These retaining-bands H comprise a strip of resilient metal provided with the aperture H at one end and a hooked tongue portion H at the other. These bands may also 'be provided on their under face with the teeth or projections h, adapted to be embedded in each section of the packing-ringfor instance, by a slight tap of a hammer. These projections engaging the sectional members of the packing-ring will serve to make a more perfect unison of movement between the sections, as it will be obvious that being thus connected together the movement of one member toward the reciprocating rod will impart a corresponding movement to the other member through the medium of the retaining-band, thus compensating for any unevenness-of fluid-pressure on the sectional members.

In order that more resiliency be given to the retaining-band H, it is preferred that it be normally formed as indicated in Fig. 5, the dotted lines indicating the position when it is fastened around the rings.

In Figs. 7 and SI have illustrated aslightlymodified form of the joint-ring. In this construction the mortise-and-tenon joint is dispensed With and the ends of the sectional members G and G have flat faces, the two members being securely fastened together by the screws The peripheral surface of the member G is recessed, as at G forming seats for the heads of the screws g the end faces of the member Gr being provided with apertures opening into the recesses G". These apertures in the member G? are adapted to register with screw-threaded recesses formed in the member G, in which the screws 9 0perate. The screws g are provided with transverse apertures adapted to register with apertures extending transversely of the member G" and through which are driven pins g for locking the parts securely together and preventing the screws from turning and the parts becoming loosened.

The conjoint thickness of the various rings is such that when assembled in the stullingbox chamber there is a small space(indicated by the letter X) for admitting the expansive fluid within the stufiing-box chamber and at the same time preventing the binding of the joint and abutment rings against the walls of the stufiing-box should there be viln'ation of the reciprocating red.

It will thus be seen that my metallic packing-rings and the associated parts for bold ing the same in position comprise sectional members, so that the packing may be readily put on any reciprocating rod at any time to replace any breakage that may occur to the packing, an important feature, especially in railroading.

I do not wish to limit myself to the exact details as shown, as modifications might be made without departing from the spirit of my invention; but

What I claim is 1. A metallic packing-ring, comprising a plurality of segmental members, the opposite ends of each of said members being of a concave and convex conformation, respectively, for forming an unobstructed bearing-surface transversely of the members, and the concave face of one of said members adapted to form a sliding joint with the convex face of the opposite member.

2. A metallic packing-ring, comprising a pair of semicircular members, the opposite ends of each of said members being of a concave and convex conformation, respectively, for forming an unobstructed bearing-surface transversely of the members, and the concave face of one of said members adapted to form a sliding joint with the convex face of the opposite member.

3. A metallic packing-ring, comprising a plurality of segmental members, the opposite ends of each of said members being of a concave and convex conformation, respectively, for forming an unobstructed bearing-sinface transversely of the members, and the concave face of one of said members adapted to form a sliding joint with the convex face of the opposite member, and a resilient band encircling said members for holding them in their assembled position.

4. A metallic packing-ring comprising a. plurality of segmental members, the ends of said members being suitably beveled off to form a sliding joint therebetween, a resilient band, encircling said members for holding them .in their assembled position, having a bent portion to increase its resiliency when encircling said members, and means for securing the ends of same.

5. A metallic packing-ring comprising a plurality of segmental members, the ends of said members being suitablv beveled oil to form a sliding joint therebetween, a resilient band encircling said members for holding,

them in their assembled position, and means for securing said band to said segmental memthe combination with a packing-ring comprising a plurality of segmental members, the opposite ends of each of said members being provided respectively with a concave and convex bearing-surface, the concave face of one of said packing-ring for preventing its displacement longitudinally of said rod, means for retaining the sectional members of said adjacent ring when assembled, and means for retaining the segmental members of said packing-ring when assembled, comprising a resilient band extending peripherally therearound. i 7 In a packing for reciprocating rods, the combination with the stuffing-box surrounding said rod, of metallic packing-rings within the bore of said stuifing-boX, comprising a plurality of segmental members, the ends of said members being suitably beveled offto form a sliding joint therebetween, means for holding said members together, a sectional abutment-ring located on one side of said packing-rings and means for holding the sections'of said abutment-ring together, a sectional joint-ring located adjacent the other side of said packing-rings and means for holding the sections of said joint-ring together, a gland-plate engaging the outer. face of said stufiing-box, and means for securing said gland-plate to said stufiing-box.

' 8. In a packing for reciprocating rods, the combination with the stufiing-box surrounding said rod, of metallic packing-rings within the bore of said stuffing-box, comprising a pair of substantially semicircular members, the ends of said members being suitably beveled off to form a sliding joint therebetween,

' means for holding the sectionalmembers of said packing-rings together, a sectional abutment-ring located on one side of said packing-rings, and means for holding the sections of said abutment-rings together, a sectional joint-ring located adjacent the other side of said packing-ring, and means for holding the sections of said joint-ring together, a glandrplate provided with an annular groove, a

gasket located within said groove and engaging the outer face of the stuffing-box, and means for securing said gland-plate to said stuffing-box.

'9.'The combination with the stuffing-box and reciprocating rod therethrough, of a metallic packing for said rod, comprising the sectional metallic packing-rings of lesser diameter than the bore of the stuffingbox, means normally holding the sections of each of said packing-rings together, an abutmentring adjacent said packing-rings, a joint-ring located on the other side ofv said packing-rings comprising a pair of substantially semicircular members, clamping means engaging the ends of said members, a gland-plate engaging said joint-ring, and means for securing said glandplate to said stufling-box.

10. The combination with the stuffing-box clampingscrews operating in said recesses and engaging the ends of the other said member, a gland-plate engaging said joint-ring, and means for securing said gland-plate to said stufling-box.

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

BREWSTER W. ORIBB. Witnesses:

R. F. WILLIAMS, J. I. ORR.