US149617A

US149617A - Improvement in packing-rings

Info

Publication number: US149617A
Authority: US
Publication date: 1874-04-14
Anticipated expiration: 1891-04-14

Description

E. SULLIVAN.

Packing Rings. "No.149,6l7. K lfuentedAfprilmnm,A

Wm Wm.

NITED STATES PATENT QEEICE.

EDWARD SULLIVAN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WILLIAM REA AND GEORGE T. ROBINSON, OF SAME PLAGE.

IMPROVEMENT IN PACKING-RINGS.

Specification forming part of Letters Patent No. 149,617, dated April 14, 1874; application iiled December 13, 1873.

To all whom 'it may concern:

Beit known that I, .EDWARD SULLIVAN, of Pittsburg, in the county of Allegheny. and State of Pennsylvania, have inventeda new and useful Improvement in Packing-Rings; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing forming a part of this specification, in,

section forming one ot' the laps, the section being smoked at one end to prevent it from welding, so that when the ring is cut opposite to the smoked part it shall be free to expand. It also consists in forming the division-lines of the laps on a bevel.

To enable others skilled in the art to make and use my invention, I will describe its construction and operation.

Hi-therto these rings have been made by casting, and then planing or cutting the laps B and C. This method, on account of the eX- tremely delicate work of finishing the laps to make their adjacent faces perfectly true, is very slow andcostly. Y,

Tosimplit'y, shorten, and cheapen the manufacture of these rings is the object of this in.- vention.

I cut a curved piece, a, as shown in Fig. 4, which, having smoked7 at one end, I set in the side of the moldr in which the ring A is cast. The molten metal unites with the unsmoked end of the piece a., and flows around, but does not weld with the smoked end. When the casting is completed, I cut or sever the ring, as at i', opposite to the smoked part of the piece a," then the ring is free to expand. This Way of forming the ring with its laps is easy and inexpensive, while the lines of division between the laps is perfectly true, and require no linishing.

I have found the old or plain lap is objectionable, because the end of the outer one throws up and admits the steam between them, which cuts off the corners, and causes the ring to leak. I prevent this by cutting the adjacentfaces on a bevel, as shown at c. The overlapping edge of the lap O guides and holds the lap B as the ring expands. The follower, being bolted against the side of the lap, prevents its lateral displacement.

The piece a may be made by casting a ring with a beveled upper edge and cutting it in sections. The hole c is made to cause it to unite more readily in casting. This piece may be smoked in the middle, and left free to unite with the ring at both ends.

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

1. The method of forming the ring A with its laps B and G, by casting upon a section, a, properly smoked, and freeing the laps by cutting, as at i, substantially as described.

2. The laps B and C, having a beveled line of separation, c, substantially as described.

ln testimony whereof I, the said EDWARD SULLIVAN, have hereunto set my hand.

EDWARD SULLIVAN.

Witnesses:

FREDERICK STANDIsH, T. B. KERR.