US324754A - George dick - Google Patents

Description

(No Model.)

G. DICK.

PISTON PACKING.

Patented Aug. 18 1885; Z 72 15 JJV VEJVTOR WI TJV'ESAS'ES y, 95 W 724 Attorneys.

NITFD rare GEORGE DICK, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TO JOHN EMORY BELL, OF SAME PLACE.

PISTON-PACKING.

SPECIFICATION forming part of Letters Patent; No. 324,754, dated August 18, 1885.

I Application filed June 3, l885. (No model.)

T 0 all whom, it may concern.-

Be it known that l, Gnoncn DICK, a citizen of the United States, and a resident of Baltimore, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Piston-Packings; and I do hereby declare that the following is a'full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw ings, which form a part of this specification, and in which- Figure l is a side View of my improved piston-packing for steam-cylinders. Fig. 2 is aside view of the same with the packing-rings removed. Fig. 8 is a front view ofthe device, with parts broken away in order to show the construction more clearly. Fig. 4 is a ver-.

tical cross-section taken on the line 00 x in Fig. 3; and Fig. 5 is a detail view in perspective of one of the segments of my improved pistonpacking.

The same letters refer to the same parts in all the figures.

This invention relates to piston-packings for steam-cylinders; and it has for its object to provide a simple, economical, and durable packing which shall be self adj usting, and which shall. possess superior advantages in point of simplicity, durability, and general efficiency.

\Vith these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, A designates the bull-ring of my improved pistonpacking, which is composed of a series of seg ments, 1- I3, the ends of which are provided with inwardly-extending lugs (l (3, having perl'oralions D l) to receive the connectingbolts IQ I l, having nuts F F, by tightening which the said segmental sections may be securely connet-ted. Between the ends of the several sections suitable plates or washers, G G, may be interposed, for the purpose of causing the ring to lit neatly and tightly in the cylinder, and o to compensate for wear whenever necessary.

The outer edge or periphery of the bullring is provided with a series of annular grooves, H II, which are for. the double purpose of reducing friction during the operation of the device and to cause a more tight and perfect fit of the device in the cylinder by the gradual accumulation of steam in the said grooves.

The hullring is provided at each end with an annular angular recess, I, having a flange, J, at the outer end thereof. Seated in the innor end of each of these recesses is a plain fiat packingring, K, which may be rectangular in cross-section, as shown in the drawings hereto annexed, and outside of each of the rings K is arranged an angular, or, in cross-section, L- shaped, packing-ring, L. The rings K and L are provided with slits M, in order that they may be readily sprung into the recesses in which they are to be seated, and where they are retained securely by means of the flanges J. The packing-rings K and L will tit tightly against the walls of the cylinder, and the slits M of the said rings will break joints,- so as to prevent steam from passing by the said rings.

\Vhen the angular packingring L has been sprung into its operative position, its upper outwardly-projecting flange, L, extends over the upwardlyprojecting short annular flange J of the bull ring, and the steam, entering the space between the upper flat edge ofthe flange J and the outwardlyprojecting flange L of the angular ring L, will operate to still further expand the ring L, and thereby cause a more tight and perfect fit ol' the device in the cylinder, as will be readily understood.

The operation and advantages of this inven tion will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed.

The construction is simple and inexpensive. The bull-ring being made in sections, as described, may be much more easily applied to the piston than the solid bull-rings ordinarily used, which latter frequently have to be sawed or parted before they can be adjusted, and atterward joined, unless the piston-rod be disconnected, which, for many reasons, is objectionable. Again, by making the bull-ring in sections, as described, thin plates or washers .may be easily interposed between the several l sections, so as to compensate for wear, thus rendering the device more durable. The construction and arrangement of parts is such that the wear is evenly distributed, and not, as is often the case, concentrated upon one side of the cylinder, the importance of which is obvious.

13y constructing the bull-ring with the short outer annular flanges, J J, and arranging the angular packingring L in the manner described, the piston is to a certain extent steampacked, and a more tight and perfect fit of the piston in the cylinder is effected.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States-- 1. Abull-ring for piston-packings composed of a series of segmental sections provided at their ends with inwardly-extending lugs hav ing transverse perforations and suitable c011- necting-bolts, substantially as and for the purpose herein set forth.

2. A bull-ring for piston-packings composed of a series of segmental sections suitably connected together, pieccsor washers interposed between the abutting ends of the several sections, substantially as and for the purpose herein set forth.

3. A bull-ring for piston-packings composed of a series of segmental sections suitably connected together, said bull-ring being provided at each end with the annular angular recess in combination with thin and the short annular flange, in combination with the slotted annular plain or fiat packingring and' the slotted annular angular outer packing-ring, arranged as described, for the purpose set forth.

4. The combination, with the bull-ring provided at each end with an annular recess and a short annular flange, of two packingrings, the inner plain or fiat and the outer L-shaped in crosssection, and arranged as described, for the purpose set forth.

5. As an improvement in piston-packings, the combination of a bull-ring composed ofa series of segmental sections provided at their ends with inwardlyextending perforated lugs, suitable bolts connecting the said sections, annular angular recesses at each end of the said bull-ring, flanges formed at the outer ends of the said recesses, and the plain and L-shaped packing-rings having slits, as herein described,

-! said rings being sprung into the recesses at the ends of the bull-ring, substantially as and for the purpose herein set forth.

In testimony that I claim the foregoing as my own I have hereunto affiXed my signature in presence of two Witnesses.

G EORGE DICK.

WVitnesses:

JNo. T. MADDOX, J. M. WI-IERRETT.

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