US661384A - Metallic packing. - Google Patents

Description

No. Sabam.. 'Pitman Nov. 6, mun.

w. H. PnENnEnGAsT.

METALLIC PAcKme.

(Application led Jan; 19, 1900.3 (Nn Model.)

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WILLIAM HENRY PRENDERGAST, OF SAVANNAH, GEORGIA, ASSIGNOR OF ONE-HALF TO 'IIIEODORE D. KLINE, OF SAME PLACE.

METALLIC PACKING.

SPECIFICATION forming' part of Letters Patent No. 661,384, dated November 6. 1900. AppCaOll led January I9, 1900. Serial'No. 2,027. (No model.;

T all whom, it may concern.-

Beit known that I, VILLIAM HENRY PREN- DERGAST, residing at Savannah, in the co nnty of Chatham and State of Georgia, have made certain new and useful Improvements in Metallic Packings, of which the following is a specification.

My invention is an improvement in metallic packing for use on piston-rods, in air- Io pumps, and in other locations Where a tight durable packing is desired; and the invention consists in certain novel constructions and combinations of parts, as Will be hereinafter described and claimed.

I5 In the drawings, Figure l is a sectional View of a portion ofa cylinder-head and packing-box provided With my improvement. Fie". 2 is an edge View, and Fig. 3 a side View, representing a pair of packing-rings embodying zo my invention. Fig. A is a perspective'view of the spring-plate with the attached springs. Fig. 5 is a detail perspective view of. one of the sections of the packing-ring. Fig. 6 is a detail perspective view illustrating one end of one of the equalizingplates and the spring for engagement therewith, and Fig. 7 illustrates a slightly-different construction by which the packingring sections may be spring-actuated.

3o In the construction shown in Fig. l, A may represent the head of a cylinder, and B a packing-box held t-hereto by bolts C and packed atD in any suitable manner. The piston-rod E plays through the head A and box B, and upon this rod E, I lit the packingrings F, the spring-plate G, and the universal sections H II. The sections H and II have a ball and socket joint at their cont-acting edges to permit a slight rocking, as may 4o be necessary to compensate for vibration or displacement of the piston-rod. The outer side of the ring H' is flat to rest squarely against the square inner face of the box B, and the inner face of the ring H is (iat to lit squarely against the packingring, which abuts against it. The packing-rings F are alike and are each composed of a number of similar sections I, Whichare formed as shown in Fig. 5 and applied together, as shown in 5o Fig. 3, to form a complete ring. The sections I have their inner edges curved on the arc of a circle at I and their outer edges similarly curved at I2. At one end the section I has a projecting tongue I3, which extends from one end at itsouter side and is formed to ft in a corresponding recess in the upper rear end ofthe adjoining section. Thuseach section I is formed at its outer side with a tongue projecting from one end and a recess in its other end fitted to receive such tongue. 6o By making the sections alike one can be readily reinovcd and another inserted in its place, or they may be interchauged to secure an even wear or forother purposes, as may be desired.

An equalizing-plate J is tted over each ring and extends circumferentially, with its ends comparatively near together. These ends of the equalizing-plates are arranged for engagement by the ends of the springs K, 7o presently described, and this is preferably ei"- fected by providing the ends of the equalizing-plate .I with pockets at J', formed by returning the said ends of the plates J, as is best shown in Figs. 2, 3, and 6. The springs K extend circnmferentially along their respective equalizing-piates and engage at their ends in the pockets J', as will be understood from Figs. 2, 3, and G. By the described construction the spring exerts a tension which 8o the equalizingplate transmits to the sectional ring uniformly throughout the circumference of the ring. I thus secure an even pressure upon the sections of the packing ringsand reduce wear by securingan even distribution of the packing-pressure.

As indicated in Fig. 3, in which the sections of one packing-ring are indicated in full lines and those of the next ring in dotted lines, the joints of the sections of the adjoin- 9o ing packing-rings are staggered. To lnaintain the rings in this relation, I provide a connecting-pin L, which, as shown in Figs. l and 3, is arranged near the outer edges of the rings and extends between and connects the rings, as shown in Fig. l, so the said rings cannot rotate independently. By preference the pin L is secured in grooves formed in the outer edges of the packing-rings, being held in place by the overlying equalizingtoo plates, as is best shown in Figs. l and 3. The pin L is preferably formed to .fit the square or non-circular grooves in the periphery of the rings, the pin being thus held from rolling out of place. V

The spring-plate G fits on the piston-rod and rests at its outer edge G fiat against the innermost packing-ring F. At its inner side the ring G is provided With the spring-plates G2, which are secured at a point between their ends at G3 to the ring, With their ends detlected, so they Will bear uniformly against the endof the chest A.

The plate G is rabbeted, as shown in Fig. 4, forming the shoulder G4, against Which the deflected ends ofthe spring bear., so they cannot turn out of position, and the spring being double-ended and secured at the center has no tendency to tear the head off the rivet that securesit in place. This spring-plate G operates to keep the packing quiet When the en'- gine is rolling, and by the special construc.

tion of such plate this rolling action does not tend to displace the springs thereon.

The sections of my packing-rings being exact counterparts of veach other and not requiring to be cut or turned, I avoid the necessity for machine-Work, and the sections can be kept in stock and used at a moments notice.

My packing, as will be understood, is set down by steam, the pressure varying as to the Work required, so that When steam is shut off the packing Will relax and remain frictionless while the engine is rolling downhill, and the action of the rod will have no tendency to disturb the packing.

In'Fig. 7 I show a somewhat-different arrangement for setting the packing down on the rod, which may be used in air-pump stuffing-boxes or in other location Where there is not sufiicient space to apply equalizing-plates and springs K. Having thus described my invention, what I claim, and desire to secure by Letters Patent, is y l. In a packing substantially as described, the combination of the packing-ring sections, the equalizing-plate fitting over the said sections and extending circumferentially of the packing-ring, and the spring fitting over and extending circumferentially along the equalizcr-plate and engaged at its ends With such plate adjacent to the ends of the latter.

2. In a packing substantially as described the combination, of the universal sections having a ballandsocket joint at their contacting edges, the packing-rings composed o f sections fitted together, the equalizing-plates fitting over the ring-sections and extending circumferentially of the ring, Athe springs fitting over and extending circumferentially along the equalizing-plates and engaged at its ends with such plates adjacent to the ends of the latter, and the spring-plate provided With springs and adapted to exert pressure against theface of the packing-rings substantially as set forth.

3. In a packing substantially as described, the combination ofthe packing-ring sections and the equalizing-plate fitting over the ringsections and having pocket-like seats at its yends and the spring fitting over the equalizing-plateA and engaged at its ends in the pocket-like seats of the equalizing-ring.

4. In a packing, a plurality of rings fitted side by side and composed of sections fitting together to form their rings, the joints of the sections of one ring being staggered With respect to the next, and such rings being provided in theirperipheries With alined non-circular grooves, and a pin extending between said rings and fitted to and in said grooves substantially as set forth.

5. In a packing substantially as described the combination ofthe packing-ring sections, the equalizing-plate fitting circumferentially on the packing-ring and having its ends separated vand spaced apart, and spring devices exerting a tension directly on said ends of the plate in adirection to press such ends toward each other substantially as set forth.

6. In a packing substantially as set forth the combination of the packing-rings fitted side by side and composed of sections, the joints of the sections of the adjoining rings being staggered, and said rings being provided in their outer edges with grooves, the pin fitting in said grooves and connecting the adjoining packing-rings, and the equalizingplates fitting on their respective rings and over the grooves and pin therein substantially as set forth.

7. In a packing substantially as described, a spring-supporting plate which is rabbeted forming a projecting shoulder, and springs held to said plate alongside said shoulder, such springs being held at their middles to the plate and having their ends defiected and bearing edgewise between their ends and middles against the said projecting shoulder and the packing devices substantially as set forth.

WILLIAM HENRY PRENDERGAS'I.

Witnesses:

L. M. NoRWooD, GEO. W. BEoKETT.

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