US684321A

US684321A - Piston packing-ring.

Info

Publication number: US684321A
Application number: US3434800A
Authority: US
Inventors: William W St John
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-10-25
Filing date: 1900-10-25
Publication date: 1901-10-08
Anticipated expiration: 1918-10-08

Description

Patented Oct. 8, |90I.

No. 684,32l.

w. w. sT'. amm. PISTON PACKING RING.

(Application led Oct. 25, 1900.)

(No Model.)

UNITED STATES PATENT OFFICE.

VILLIAM lV. ST. JOHN, OF BINGIIAMTON, NEW YORK.

PlsToN PACKING-eme.

SPECIFICATION forming part of Letters Patent No. 684,321, dated oetobet' s, 190i. ppumion mea October 25,' 1990,Y seal No. 34,348: (No mais To all whom t may concern:

Be it known that I, WILLIAM W. Sr. JOHN, a citizen of the United States, residing at Binghamton, in the county of Broome and State of New York, have invented certain new and useful Improvements in Piston Packing-Rings; 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 of reference marked thereon, which form a part of this specification.

My invention relates to that class of packing-rings for pistons in which the split ring is made steam-tight by a filling-piece of peculiar construction and arrangement.

The object of the invention is to produce a packing-ring of such cross-section that one of the sections ts into a rabbet in the other and provided with a filling-piece to form a tight joint; also, to produce the filling-piece with a tongue on its inner side, which fits into a corresponding rabbet in the ring; also, to arrange the filling-piece so that it closes the joint of the ring in a thorough manner; also, that it can be milled in while the ring is in the lathe and when put in can be turned off with the ring; furthermore, that the recess in the outside face of the ring admits steam all around it, and small holes in this part of the ring admit steam under the ring to press it against the bore of the cylinder, and, finally, that a perfectly-tight ring can be produced at a small cost. The recessed part may be of any width toll the groove, as it does not affect the packing-ringsurface.

With these objects in view my invention consists in the peculiar construction of certain parts and the novel arrangement of parts, as will be more fully described hereinafter and specifically pointed out in the claims, reference being had tothe accompanying drawings, in which- Figure l represents a plan of the packingring. Fig. 2 is a side or edge view of the same, showing the filling-piece. Fig. 3 is a similar view showing the holes for admitting steam under the ring. Fig. 4 is a cross-seetion of a piston with the packing-rings in position.

In the drawings, A represents a packingring of the cross-section sliown in Fig'. 4, into which the auxiliary ring B, of I; shape, fits, having one side fitting into a rabbet to retain it in position. These rings are cut and secured together by the rivets a, a, (shown'in Fig. 3,) while the opposite side is provided with the lling-piece O. In this view holes b b are shown for admitting steam under the ring A to press it out against the bore of the cylinder. The filling-piece C is provided with a tongue c on its inner side, that iits into a rabbet, and it is held in place by a rivet or pin d at one end, while the other end is free, so as to allow the ringto expand, as required. The tongue extends laterally into a rabbet arranged between the two faces of the ring C, and not as it has been heretofore donet'. e., extending sidewise from t-he ends of the lling-piece and into rabbets in a circumferential manner. In my piston packing-ring the tongueis also arranged to extend laterally around the inner edge of the iilling-piece and is milled out of the thickness of the fillingpiece, while in all others known to me the said filling-piece is parallel and the tongue extends longitudinally from the ends thereof. The recess for the filling-piece in the face of the ring admits steam all around the ring and can be made of any Width desired for packing purposes. Au opening or hole e through the follower D or outside of the groove serves to admit steam under the ring, if desired. A short spring may be used to hold the ends` of the ring down.

It will be readily observed by those skilled in the art that this ring will make a perfectlytight packing for a piston, it is not liable to get out of order, it will not cause binding of the piston in the cylinder, can accommodate itself to the bore of the cylinder and yet form a tightjoint,preventing any leakage of steam, which is a very objectionable feature in piston-packing and causing loss of horse-power; it can be readily produced at a reasonable cost, and it can be easily applied to steam, hydraulic, hot-air, pneumatic, or other engines.

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

1. In a piston-packing, the combination of IOO the piston with the divided packing-ring and a filling-piece having a ange projecting therefrom and a rahbet in the packing-ring,

into which the ange of the filling-piece is 5 seated, substantially as speeied.

2. In a. piston-packing, the combination of thepiston, and the divided packing-ring, with a filling-piece, having a ange projecing Icherefroxn and a rabbet in the pack- Io ing-ring, into which the said ange of the lling-pieee iS seated, spring and means for fastening the filling-piece to the packing, 3.11V

as set forth. u In testimony whereof l affix my signature in presence of c wowibnesses. l v

WILLIAM W. ST. JoIIN.

Vitnesses:

WALTER S. FLINT, ALBERT S. BARNES.