US333582A - williston - Google Patents

Description

(No Model.)

B. F. WILLIS'TON.

3 PISTON ROD PACKING.A

No. 333,582. 'Patented Jan. 5, 1886.

UNITED STATES PATENT OFFICE.

BENJAMIN F. WILLISTON, OF WEST BAY CITY, MICHIGAN, ASSIGNOR OF ONE-HALF TO SAMUEL A. PLUMMER, OF SAME PLACE.'

PISTON-ROD PACKING.

QPECIFICATION forming part of Letters Patent No. 333,582, dated January 5, 1886. Y

Application iiled October l2, 1885. Serial No. 179,590. (No model.) n n To all whom t may concern:

Beit known that I, BENJAMIN F. WILLIsToN, a citizen of the United States, residing at West Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Piston-Rod Packing; and

I do declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The object of my invention is to provide a Ineans of packing pistonrods by the use of coinpression-rings, and to arrange a device which is easily constructed and adjusted, and also durable, and which may be attached to engines that have a packing-box already arranged for ordinary packing; and it consists, chiefly, in the combination of a sleeve placed within an ordinary packing-box, with suitable packing-rings arranged within the said sleeve,

.and a means of admitting steam to compress the rings uponthe piston-rod, and means of Yregulating the compression of the rings to any desired point.

I illustrate the device in the accompanying drawings, in which Figures 1 and 3 represent ia longitudinal vertical section of a portion of a steam-engine cylinder which has been in use, having a common packing-box, and of my improvement thereto attached. Fig. 4 is a section of a portion of a cylinder-head and packing-box properly arranged, when new, to contain my improvement. Fig. 2 is a side view of the packing-ring and a section of the device at :n m in Fig. l.

a represents the head of the cylinder of a common steam-engine, and b is a packing-box extending from the cylinder in the usual manner.

c is the piston-rod passing through the box b and the head a.

d is a sleeve surrounding the rod c, and arranged to pass within the box b. Into the outer end of the sleeve and open to the rod c is formed a chamber, e, and in the opposite end of the sleeve is formed a similar chamber, 5o e', of somewhat greater widththan the chamber e, and for a short distance from the end of the sleeve the chamber e is provided with a female screw-thread, into which is passed the partf, which forms the inner end of the sleeve, as shown in Fig. 1. Within the chambers e and e are placed packing-rings h, which are fitted to entirely fill the chambers, except on the outside of the rings, where a considerable space is left between the rings and sleeve, for 6o the admission of steam to act to press the rings to the piston. These rings are formed of an inner ring, t', and an outer ring, Z, each ring being divided, to allow for proper expansion and contraction, and the dividing-openings are placed a short distance from each other, and the rings are prevented from turning by a pin, m, being placed in a properly-formed recess between the rings. This arrangement of the openings prevents the steam from pass- 7o ing through the openings and beneath the rings. Around the outside of the sleeve a chamber, n, is formed between the sleeve and packing-box, and ports o and o are formed through the sleeve, connecting the chambers n with the chambers e and e above the pistonrod, to admit steam to the chambers e and e', and similar ports, p and p', are formed below the piston-rod, to allow any condensedvapor to pass out. At the outer end of the sleeve 8o and around the outside part thereof is formed a chamber, r, into which isplaced the pack'- ing r', and the gland s is caused to press upon the packing r by the bolts t, holding the packing and sleeve rigidly in position, and preventing any leakage of steam therefrom.

One end of a steam-pipe, u, vis passed through the walls of the packing-box, and its opposite end is connected with the steamchest, steam-pipe, or boiler, to admit-a supply 9o of steam to the chamber n, and a valve, u', is placed in the pipe u, with which to regulate the flow of steam to the chamber, and a reliefpipe, w, provided with a suitable valve, y, is placed in the lower part of the packing-box, for drawing off the condensed vapor and for regulating the pressure within the chambers n, c, and e.

Upon some engines I place a packing, t', between the outer part of the packingbox b and the projecting part of the gland s, instead of the packing i". The amount of room being greater, I can form thereby a more secure joint, and one that allows the packing to be more easily replaced.

When the parts are in a proper position, as herein described, the valve u is opened and steam is admitted to the chamber n, and, passing through the ports o and 0 to the chambers e and e', it forms a pressure within the chambers, which acts tov compress the rings h upon the piston-rod, and thereby prevent the escape of steam from the cylinder through the rod-opening, and the rings being flexible' they are allowed to expand and contract, so that a rod that has become considerably Worn away and uneven can be securely packed by the rings and work equally as well as a piston-rod that is perfectly true and even. The pressure upon the rings is regulated by the relief-valve i, which is operated to allow a portion of the steam to escape from the chamber a, so` that just the required amount of pressure can be arranged to compress the rings, to insure a close-fitting joint without an undue quantity ot' friction being produced.

The sleeve may be used with one inner chamber only, the chamber e being omitted, and in some cases this would be sufficient; but by having the two sets of rings, as described, the operation is more satisfactory and complete.

By having the part fscrewed into the inner end of the chamber e the width of the chamber can be adjusted to properly iit the width of the ring h, and by this means the ring may also be easily removed and replaced when applied to an engine which is already tted up for other packing, having the inner end of the packing-box beveled, as shown in Fig. 8, and which also shows an end piece, f', screwed into the outer end of the sleeve, similar in all respects to the piece f, which is screwed into the inner end of the sleeve, as before explained. This construction of the .parts is used when the packing isplaced within a packing-box the gland s of which is imperfectly fitted.

In fitting up new work the packing-box Z),

as shown in Fig. 4, is prepared at its inner end to fit upon the side of the packing-ring, and the sleeve d is arranged with the chambers e of just the proper width to receive the rings h, so that when the gland s is properly secured the rings 7i will have just the proper working-room required.

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

l. In a piston-rod packing, the piston-rod c and packing-box b, in combination with a sleeve, d, located within the packing-box and surrounding the piston-rod, the chambers e and e on the inner part of the sleeve, the packing-rings h within the said chambers, the chamber a between the sleeve and packingboX, the ports o and 0 and p and p', connecting the chamber n with the chambers e and e', the packing r', thegland s, holding the said sleeve in position, the steam-supply pipe a, provided with a valve, u', connected with the packing-box, and a relief-pipe, fw, provided with a valve, y, connected with the under side ot' the said box, substantially as and for the purpose set forth.

2. In a piston-rod packing, the combination, with the packing-box provided with pipes for admitting steam to and from the boX, of asleeve provided with inner chambers for holding compression-rings and surrounding the piston, and an outer chamber between the sleeve and packing-box, and steam-ports connecting the said outer chamber with the inner chambers, and with compression-rings placed within the said inner chambers and surrounding the piston, substantially as and for the purpose set forth.

3. In a piston-rod packing, a compressionring formed of an inner divided ring, i, surrounding the piston, and an outer divided ring, Z, surrounding the said inner ring, and with their dividing-openings placedin such positions as that one ring shall close the opening in the other ring, and a pin, m, passed through recesses between the rings and adapted to hold the rings in their position relative to each other, substantially as and for the purpose set forth.

4. In a piston-rod packing, the piston-rod c and packing-box b, provided with pipes arranged to admit steam to and from the box, in combination with a sleeve, d, placed within the packing-box and provided with the chambers e and e', the removable end pieces, f andf, passed into the open end of the said chambers e and e, the rings hwithin the chambers c and e and surrounding the piston, a chamber, u, between the sleeve and packingbox, and the steam-ports o and o andp and p', connecting the chamber n with the chambers e and e', substantially as and for the purpose set forth.

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

BENJAMIN F. VILLISTON.

Vitnesses:

W. H. POWER, J. E. THOMAS.

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