US191892A - Improvement in stuffing-boxes for steam-engines - Google Patents

Description

. UNITED STATES for- Letters Patent of the United States on form, and so as to provide an annular rim, A,

CHARLES T. SLEEPER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TO GEORGE G. BENEDICT, OF SAME PLACE.

IMPROVEMENT IN STUFFlNG-BOXES FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. 91,892, dated June 12, 1877 application filed February To all whom it'may concern Be it known that I, CHARLES T. SLEEPER, of Chicago, in the county of Cook and State of Illinois, have invented new and useful lmprovements in Stuffing-Boxes for Steam-Engines, and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which e Figure 1 represents a longitudinal central section of a stuffing-box embodying my said invention, and Fig. 2 represents a cross-section of the same, taken on line m m, Fig. 1.

Like letters of reference indicate like parts;

The object of my invention is to improve the stuffing-box for which I made application the 20th day of March, 1876; and it consists in providing the laterally movahle cone with an internal flange or shoulder, against which the packing-rings rest; and, also, in combina tion with the packing-rings, of a double follower, as hereinafter more fully described and claimed. 7 v

In the drawing, A represents a section of the cylinder-head, whichis made in the usual projecting from the'outer end thereofiaround the piston-rod in the ordinary manner. 0 is the stuffing-box proper, which is fitted into the rim A and permanently bolted thereto, and in the position shown in Fig. l. D is the piston-rod,which passes centrally through the stuffing-box C. E represents a series of packing-rings, which are made from any suitable soft metal, and are fitted around the pistonrod within the stuffing-box. F is an annular cap, through which the piston rod loosely passes, and is screw-threaded externally at its end adjacent to the stuffing box, and is screwed into an annular flange on the outer end of the stuffing-box, by which means the stuffing-box and cap are firmly connected together. G is an annular sleeve fitted into the chamber of the cap F and around the pistonrod, and is provided with an internal conical chamber, through which the piston-rod passes,

and into which the packing-rings are forced from the chamber of the stuffing-box. H and H are annular rings or followers, which are fitted into the chamber of the stufling-box and ,G, and the end of the sleeve resting against the cap is ground to a steam-tight joint, so as to admit of a lateral movement of the sleeve within the cap without leakage of steam between the cap and end of the sleeve, the object being to allow the packing-rings to adjust themselves to the piston-rod should the latter be ontof line with the stuffing-box.

The packing-rings are made less in diameter than the diameter of the bore of the stuffing-box, for the purpose of admitting of any lateral movement of the piston-rod without causing the packing-rings to bind against the wall of the stuffing-box.

The grossdiameter of the follower H is such as to fill the bore of the stufling-box, and the diameter of the opening in the follower, through which the piston-rod passes, is greater. than the diameter of the rod; and the gross diameter of the follower H is less than the diameter of the bore in the stuffing-box, and the opening in the follower, through which the piston-rod passes, is equal to the diameter of the piston-rod, by which means the follower H is allowed to move laterally with the piston-rod independent of any lateral movement of the follower H, the object being to prevent any sediment which might accumulate in and escape from the boiler from passing between the packing-rings and wall of the stuffing-box.

The sleeve G is provided, at its end farthest from the stufiing-box, with an internal shoulder, f, against which the packing-rings rest. This'shoulder is curved or formed at an angle to the plane of the piston-rod, so as to allow the thin edge of the packing to ride up the inclined surface of the shoulder, which admits of a movement of the packing from the stuffing-box sufficient to keep up the supply of packing in the sleeve as the packing is worn away by the friction of the piston-rod, while at the same time the shoulder prevents the packing from being forced from the chamber of the sleeve by the pressure of the steam against the followers.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, with the stuffing-box O and series of packing-rings E, adjusted within the stuffing-box, of the sleeve G, having the conical chamber to receive the packin g-rings as the same are forced from the stuffing-box, and provided with the curved or anand series of packing-rings E, of the followf ers H H and spring J, substantially as and for the purposes specified.

CHARLES T. SLEEPER.

Witnesses:

N. O. GRIDLEY, N. H. SHEBBURNE.

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