US742784A - Piston-packing. - Google Patents

Description

PATENTED OCT. 27, 1903.

G. B. PRALEY.

PISTON PACKING. APPLICATION FILED ILY so. 1902.

2 SHEETS-SHEET l.

N0 MODEL.

(avi/fummo PATENTED 00T. 27, 1903.

G. B. PRALEY. PISTON PACKING.

APPLmATIoN FILED JULY 3o. 1902.

2 SHEETS-SHEET 2.

N0 IODBL.

UNITED STATES GEORGE B. FRALEY,

Patented ctober 27, 1903.

PATENT OFFICE.

OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO PlsToN-PACKING.

SPECIFICATION forming part of Letters Patent No. 742,784, dated October 27, 1903. .111111102111011 nea July so, 1902. serai No'. 117,619. No moana To a/ZZ whom, it may concern,.-

Be it known that 1, GEORGE B. FRALEY, a

citizen of the United States, residing in the cityand county of Philadelphia, State of Penn- Sylvania, have invented a new and useful Improvement in Piston-Packing, of which the following is a specification.

This invention relates to a piston-packing capable for use in various kinds of engines; no and the objects and advantages thereof will be set forth at length in the following description, while the novelty of the invention will constitute the basis of the claims succeeding said description. In the accompanying drawings, forming a part of this specification, Figure 1 represents a vertical sectional elevation of an engine, the piston of which is provided with packing including my improvements. Fig. 2 is a seczo tional elevation, the section of which is taken at substantially a right angle to that of Eig. 1. Like characters refer to like parts in both figures of the drawings.

The numeral 1 denotes a gas-engine pro- 2 5 vided with a crank-casing 2, furnished with the usual bearings 3 and 4, in which is mount. ed the crank-shaft 5, to which are suitably,

united the connecting-rods 6 and 7, which are provided with the pistons S and 9. These 3o pistons are adapted to traverse the cylinders 10 and 11. Each of said pistons is provided with the usual snap-rings 12. Each cylinder is shown surrounded by an annular chamber 13, into which a suitable fluid may be con- 3 5 ducted by way of the valve-inlet 15, and after circulating through the same can be discharged from the valve-outlet 14. As the said chambers 13 and the inlet and outlet therefor constitute no part of the present invention,

4o it is unnecessary to describe the same at length. Each piston is provided with a cup 16, which ismade of leather or suitable material and which is adapted to act as a receptacle for oil, glycerin, or other lubricating substances, it being seen that between the outer edge of the cup and the head of the piston and inner Wall of vthe cylinder. is situated a packing-ring 17, Which thus protects the edge and side of said cup and prevents wearing of 5o the same.

The circular cups 16 are fastened to the upper ends of the pistons 8 and 9 by means of circular plates or disks 1S, screws 19 or their equivalents being passed through the plates, rings, and upper ends of the pistons, respectively, in order to unite the parts, the heads of the screws being countersunk in the plates or disks in order to present no protuberances on the upper faces of said disks. The packing-rings 17 snugly fit in rabbets in the upper ends of the pistons, and their upper sides are shaped to agree with the corresponding portions of the packing-rings, the fit between the rings and packings being a snug one.

The cups o r packings 16 are adapted to contain a lubricant, and their outer edges or margins travel lightly in contact with the inner surfaces of the cylinders, whereby said surfaces are properly lubricated, and the rings 17 in addition to preventing undue wear of the packing disks or cups 16 also limit the lateral `expansion of said cups, whereby the latter cannot be unduly laterally expanded by the entering charges of gas, as in case they 7 5 Were they would bind against the inner surfaces of the cylinders, and thereby affect the proper operation of the engine. i

The invention is not limited to use in connection with any particular type of engine; but that shown is of a type using carbon dioXid as the motive agent, and in an engine of this kind it is the custom to employ a heater in the acting side of the cylinder. Such a heater is shown in Fig. 2 and is denoted in a 85 general way by 20. This feature, as well as the supply-valve mechanism, forms no part of the invention, and hence a detail description thereof is unnecessary. In said Fig. 2, however, I have shown an arrangement of gearing between the crank-shaft 5 and the supply-valves, which I denote in a general way by 21.

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

1. The combination of a cylinder and a piston therein, a circular cup adapted to contain a lubricant, fastened to the upper end of the piston, constituting a packing and the outer Ioo edge of which is adapted to travel lightly in fit the outer portion of the cup and serving Contact with the inner surface of the cylinto prevent the Wear of the eup. der, and a ring tted to the upper end of the 3. The combination ofa cylinder and a pis- 2c piston and shaped upon its upper side to ton therein, aeircular cup adapted to contain 5 snugly receive the outer portion of the cup a lubricant, fastened to the upper end of the and serving to prevent the Wear of said cup. piston, constituting a packing and the outer 2. The combination of acylinder and a pisedge ofwhich is adapted to travel lightly in ton therein, a circular cup adapted to contain Contact with the inner surface of the cylinder, 25 a lubricant, fitted to the upper end of the pisand a ring tted in a rabbet in the upper end Io ton, constitutinga packingand the outer edge of the piston, shaped on the upper side to of which is adapted to travel lightly in oonsnugly receive the outer portion of the cup tact with the inner surface of the cylinder, a. and servin g to prevent Wear on said cup. plate upon the cup, fastening devices extending through the plate, cup and upper end of GEORGE B' FRALEY 15 the piston, respectively, to hold the parts to- Witnesses:

gather, and a ring tted to the upper end of JOHN A. WIEDERSHEIM, the piston, shaped on its upper side to snugly WM. CANER WIEDERSHEIM.

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