US451478A

US451478A - William e

Info

Publication number: US451478A
Authority: US
Publication date: 1891-05-05
Anticipated expiration: 1908-05-05

Description

(No Model.)

w. E. 0-001) 860. 0. LINDROTH. PISTON.

No. 451,478. Patented May 5,1891.

Wifnesses: 6 inveni'o"s s UNTTED STATES XVILLIAM E. GOOD AND OARL-OSKAR LINDROTH, OF PHILADELPHIA, PENN- .SYLVANIA, ASSIGNORS TO THE SOUTIDVARK FO COMPANY, OF SAME PLACE.

PATENT EEicE.

PISTON.

SPECIFICATION forming part of Letters Patent No. 451,478, dated May 5, 1891.

Application filed November 20, 1890. $erial No. 371,988. [No model.)

- T at whom it may concern:

Beit known that we, WILLIAM E. G001) and CARL OSKAR LINDROTH, both of the city and county of Philadelphia, State of Pennsyl- Vania, have invented a certain new and useful Improved Piston, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

Our invention relates to the construction of pistons and has for its object to provide a piston of improved construction and of which the outer ring, called the bull-ring,

can be readily removed and adjusted without I5 separating the piston proper from the rod to which it is attached. This is especially important in compound engines in which the high and low pressure cylinders are arranged in line with each other and with their pistons secured to the same rod.

The novel features of our invention will be best understood as described in connection with the drawings in which they are illustrated, and in which- 2 5' Figure 1 is a side elevation showing ahigh and low pressure cylinder arranged in line with each other and with their pistons secured to the same piston-rod. Fig. 2 is a face view of the piston with the follower-plate re- 0 moved. Fig. 3 is a cross-section taken on the line 1 2 of Fig. 2, and showing the followerplate in place. Fig. lis a sectional view taken 011 the line'3 4 of Fig. 3; Fig. 5, a sectional View taken on the line 5 6 of Fig. 4?, and Fig.

3 5 6 a side view showing hoW the parts ofthe bull-ring are fastened together.

A and B are respectively the low and high pressure cylinders of the engine; 0, the space between the two cyinders; D, the piston-rod;

E and E, pistons situated, respectively,in the high and low pressure cylinders.

The piston is made up of the piston proper or piston center, which is secured to the piston-rod, an outer ring, called the bull-ring,

which is secured around the periphery of the piston center, and which we preferably form in sections, so that it can be removed readily from the center, and finally the packingrings, which are secured in grooves in the bull-ring.

In the drawings we have indicated the piston center by the letter F, f being the central hole in which the piston-rod is secured, f a flange projecting beyond the face of the piston center on one edge, f a recess formed in the opposite edge to receive a follower-plate, f a threaded screw-hole, and f f &c., transverse grooves formed across the face of the piston center to receive keys or wedges.

G is the outer or bull ring of the piston, which is secured to the face of the piston center and should have aface of the same breadth as the piston center. In the outer face of the bull-ring grooves g g are formed to receive packing-rings, and the inner face of the bullriug is provided for inwardly-projectinglugs or flanges g g, &c., which fit between the flange f on one side and the follower-plate on the other. In these inwardly-projecting lugs key-grooves g are formed, so that they will register with keygrooves f in the piston center.

An important feature of the construction of the bull-ring is that it should be made in sections, as shown, lugs g g being provided at the edge of each section, so that abutting sections can be bolted together, as shown. It is sufficient that theb ull-rin g should be formed in two sections, and this plan is illustrated in the drawings.

H is the follower-plate which fits into the recess f and has a projecting flange h, which extends above the face of the piston-center surface, together with the flange f, to hold the bull-ring in place upon the center. The follower-plate is held in position by means of screws 1, which pass through it and enter the threaded perforations f 3 in the piston center.

In order to prevent the bull-ring from turning on the center and also to provide means for adjusting it from time to time, so as to keep the piston-rod in the cent-er of the cylinder, we provide keys or wedges J, adapted to enter the registering grooves f 9 the adjustment preferably being effected by means of the insertion or removal of thin plates or UNDRY AND MAOHINE shims, indicated at K. These shims and keys are inserted before the follower is secured to the piston-center and are held in place by the said follower.

IOO

13y carrying the face of the bull-ring over and key-grooves f formed along; its face, of

the followerand the flange f we are enabled to a follower II, having a flange 71 a divided secure the packing-rings (indicated by the letbull-ring G, adapted to fit between and over I 5 ter L) close to the outer edge of the piston, flanges f and 7L, grooved to receive packing- 5 thus securing abroad bearing-surface and in- I rings, and having also transverse grooves 9,

swing that the said surface shall not diminregisteringwith grooves ffiand adjusting-keys ish with the adjustment of the Wedges. J, adapted to fit in grooves g g.

Having now described our invention, what WILLIAM E. GOOD. we claim as new, and desire to secure by Let G. O. LINDRO'III. 1o ters Patent, is Witnesses:

I11 a piston, the combination, with a piston LEWIS R. DICK,

center, as F, having a flange f on one edge FRANCI." 'l. CHAMBERS.