US71664A - Charles m - Google Patents

Description

yatten 1ste-s. salmi ffirr. t! i CHARLES M. TEMPLETON, OF CONCRD, NEW HAMPSHIRE.

Letters Patent No. 71,664, dated December 3, 1867.

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Be it known that I, CIIARLESM. TEMPLETON, of Concord, in the county of Merrimack, and State of New Hampshire, have invented a new and useful Improvement in PackingBoxcs and Metallic-Steam Packing for VSteam-Engines; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and theletters of reference marked thereon, of which drawings- -f/ Figure l is a4 lateral section of my packing-box and .packing-rings in position when in use vexcept whenf/ the piston-rod or stem is removed. Y Y y Figure 2 is a section of the same with the follower and packing-ring removed, :1nd also without/thc/piston y ,/j ro'd or valve-stem. i f" Figure 3 is a sido elevation of the inner portion of my packing-ring. I, Figure 4 is a plan of the top of the inner portion of my packing-ring. /J Figure 5 is a section of my packing-ring and follower, with the piston-rod 0r valvefsteml in place.. Figure 6 is a section of my follower without the packing-ring, and withihe'rorl or stem removed. vFigure Tis a section of the packing-ring. Figure 8 is a plan looking down into the follower.

Figure 9 is a plan of the top of my packing-ring. J v// Figure 10 is an isometrica] drawing of one-half the follower, shloriiig the inside thereof, and the bevels on the inside thereof.- I7/ l p Figure 11 is an isometrical drawing of my packing-rin/gfwith one section or segment thereof removed to show the inside thereof, and the arrangement of tho parts.

Figure 12 is au isometrical drawing of the sentir/ln or segment of my packing-ring which completes fig. 11. Figure 13 is a plan of the bottom or low.er'end of my packing-box, of which fig. 1 is a section, and shows the positionof'lthe aperturesV pierced t/hroiigh' said box for the adinission'of steam to act upon the'lottom of the follower. Y v. y/

The nature of my invenijreonsists in constructing a metallic packing capable of expansion -and contraction, in such manner aslte'clasp thevpiston-rod or valve-stem tightly .when working steam, and partially releasing the sumer when `steam-pressure is relieved, and in adapting the packing-box to the purposes of my invention. /2/'10 enable others skilled in ltheart to make and use my invention, I will proceed to describe its construea tion andomode of operation.

.f I construct my packingbox of any required size, substantialyin the form indicated by the portions of /g's- 1 and 2, marked P. place at thebottom of said packing-box, the composition lining orhushing L, which is iixcd in its place, and through which passes the rod or stem, and above this lining or bushing, and in a groove turned for the reception thereof, I place a spiral spring, the use of whichwill be hereinafter more fully explained. I then construct-my follower F, (fig. 6,) which'fts in the inside of my packing-box i'n the chamber marked D,- in fig. 2. My said follower is constructed in vthe shape indicated in the drawing, iig. 10, and` hevelled inside, as shownv in said iig. 10, and in the sections, gs. 1, 5, and 6, and inside thereof is placed my packing-ring, which is operated by said follower as hereafter shown. And said follower, when in place, rests on the said spiral spring,

and\a small steam-chamber is left between said follower andthe lining or bushing L, and said steamchamber is connected with the cylinder or steam-'chest by the apertures h h h 7l, (fig. 13.) then'con'struct my packing-ring in three sections or segments, and each section or'segment is composed of two parts, the outer portion marked l Il., and the inner portion marked r, (iig. 12,) and said parts are further shown in the sections, figs. 1, 5, and 7.

Said packing-ring is shaped to the piston-rod or valve-stem, and the ends of the segments thereof filed away,

to permit said ring to close round said rod or stem, as said followeracts upon said ring, or as said ring, or

piston-rod, or stem is Aworn away by friction. And when the portions composing said ring are in place, 'they are in position4 shown by the plan of. the top of said ring, (fig. 9,) and in the drawing, iig. 11. The said outer and inner portions are arranged to break joints, as shown in said figures, and are kept in their relative positions by small steady-pins, inserted for the purpose of preventing said outer and inner portions from revolving upon each other, so that the jointsmay fall together and thus permit the escape of steam. The letters A A, B1B, C C, a a,

, bb, c c, are stamped upon the'outer andvinner segments of my packingfring, simply as guides in adjusting the same in place. 'Io-close the top of my packingbox, Iconstruet the gland T T, (figs. 1 and 2,) with the bushing or lining L L', through which passes the piston-rod or valve-stern. The face of said gland fits into the groove around the edge of,said packing-box, as shown i'u figs. 1 and 2,- Aand the said packing-ring is ground, so that the top thereof fits to the face ofthe said glandaeeurately and steam-tight, and said gland is held in'its place by screws as the glands of ordinary packing-boxes are held in place. The position of said screws is indicated by the dotted lines in said figs. 1 and 2. To' adjust my packingin position for use, I place said packing upon the rod or valve-stem, as shown, iig. 5, and it is then placed'in the chamber 'D, (fig. 2,) and the gland screwed in place, and the packing will then be in the position indicated in the section, iig. 1; the piston-rod or ralve-stem passing through the groove or aperture therefor, shown in said section. The spiral spring coiled around the chamber C, (iig. 1,) acts only to hold the follower and packing-ring up to the face ofthe gland with sufficient forceto prevent the same from rattling when steam is not` actingrupon the bottom of said follower, and also to prevent sediment from collecting between said face of said gland and the face of said ring, as would be unavoidable in case said ring should be allowed to drop away from said gland when steam was not applied. It will be under'- stood-that when in use the lower or bottom end, (speaking with reference to the drawing, fig. 1,) is attached to \the cylinder-head or steam-chest. l I

To explain the operation of my packing, I will suppose'the steam to be admitted to the cylinder upon the Side f the piston-head next the packing-box. The piston-rod will by t'ne movement of the piston be-drawn into the dindon and the expansive force of the steam, vadmitted to the small chamber C through the apertures h h, will exert upon the bottom of the follower the same pressureper square inehfthat it exerts upon the pistonhead itself. This pressure upon the bottom of the follower, forcing the same upwards orr outwards, will obvi `o'usly cause the bevels upon the inside tlxcreoftoact with a corresponding degree of force upon the bevels on the outer periphery offmy packing-ring, and the external and internal bevcls of my follower being at'the same angle with the pistou-rod, the said packing-ring will close'together upon the rod equallyat the bottom and top of my ring, and at the Sametime, by the same pressure, the outer face of said packing-ring will be forced against the face of the gland thus Aforming simultaneously two steam-tight joints, one of said joints being i formed around the rod or stem by theinnersu'rface of my packing-ring, and one formed upon the gland by the face of'said ring.v It. will be observed that-hc steam which may penetrate along the piston1od, through the bottom of my follower to my packing-ring, cannot escape farther. Not through the ringitself, for the segments of the outer and inner portion thereof, break jointsand the outcrperiphery of the inside ring 1 r is accurately fitted to the outside ring, the parts thereof being subjeetedto no friction or attrition toV impair the accuracy of thejoints` between the two. Nor can steam escape along between thevrod or ring, for the reason that said ring is 4compressed upon said rod in a steam-tight joint by the action of thcjollower. Nor can it escape along between the inner periphery of the follower and the outer periphery of the ri g; because it will be arrested by the gland fitting in the groove around the packing-box. Nor between said gland and the face of the packing-ring, because of. thejoints of the packing-ring upon the gland made simultaneously with the jointof the ring upon the. rod or stem by the action of the follower. The piston-rod having passed into the cylinder to the full lengthkof'the stroke, the steam enters the other side of the piston-headand forces out the rod. The steam exhausts 'in outer end of the cylinder, and the pressure upon the bottom ef my follower is relieved, and the clasp of the paeking, o ring upon the rod is freed by reason thereof, andthe friction of the packing upon the rod is correspondingly lessened. In case my packing is applied to valve-stems, in this case the pressure of the steam, when steam is given the engine, is not unequal as when applied alternately to one and the other sidevof the piston-head. But said pressure acts constantly upon the steam-chest and upon the bottom of my follower, and with a correspondi d' d #Y ing constancy upon my follower, without regard to the direction in which vthe valve-stem is moving, and of cour-se the clasp of the packing on the valve-stem is constant and equal. There' must of course be a constant attrition between the packing and the rod or stem working through the same, and the rod or stem and packing are constantly wearing away. As my packing wears away upon its inner surface, it will be seen that my follower, travelling outward onthe bevels of the ring, will hold said ring to thc rod in the same relative position `as when first adjusted, and my packing must last until the inner segments r r1' of said packing-ring are nearly worn away by friction.

My follower and packing-rings are made of brass or composition metal, and may be made of any metal adapted to the purpose, and will long ontlast any fibrous material that is in use for-packing.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

The packing-ring, consisting of the-.outer parts Il. R i., and the inner parts i r1". the same being arranged to break joints with each other, in common with the follower l", ull operating as and for the purpose descr-Hind.

CHARLES M. 'IEM PLE/VON.

Witnesses: Y

CnAs. I. SAN'noNn, W. M. BUTTERFIELD.

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