US357191A - Relief-valve for engine-cylinders - Google Patents

Description

PEL-L. RELIEF VALVE FOR ENGINE CYLINDERS. No. 357,191.

Patented Feb. 8, 1887.

iinesses UNITED STATES THOMAS M. FELL, OF TENAFLYyN Elv JE RSEY.

PATENT Urn-Ion.

RELIEF-VALVE For: ENGINE-CYLINDERS.

SPECIPICATION forming part of Letters Patent No. 357,191, dated February '8, 1887.

Application tiled June 14, 1886. Serial No. ltl llzl. (X0 model.)

To all whom it may concern.-

Be it known that I, THOMAS il/IARA FELL, of Tenafly, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Automatic Relief- Valves for "Steam Engines; 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 drawings, and to the letters of reference marked thereon, which form part of this specification.

This invention has relation tothe class of engine attachments known as cylinder relief-valves- It has forits object the automatic escape of" the water of condensation generally accumulating in the cylinders of the engines, and also the exhaust of any waste steam caused by the leakage of the piston or other cause.

The invention consists in the construction and arrangement of a cylinder with attachments in which is placed a piston to which two rods are adjustably secured. These rods operate the valves that control the exit-ports, the said piston being operated by the initial pressure of the steam from the main cylinder, and also in other details of construction, which will be more fully hereinafter described, and pointed out in the claims. v

Referring to the drawings, Figure l is a longitudinal section, and Fig. 2 a cross-section, through one of the valves. Fig. 3 is a sectional View .in detail of another means of stopping the valves.

A is the cylinderfprovided with two openings, a a, to which pipes may be attached that will lead to each end of the main cylinder, the pipes and cylinder not being shown, as the operation of the device can be understood Without them. Opposite the openingsa a, arethe eXhaust-portsbb, andleading from these ports are pipes F for conducting to some convenient point the water of condensation and the ex haust steam not regularly carried off.

Within the cylinder is the piston B, it being provided with grooves to form a water-packing for the same.

To each side of the piston is adj ustably secured the valve-rods G O, which project out through the headsH H of the cylinders. Stuffthem from leaking.

ingboxes G G are formed in the heads, so. that the val ve-rods may be packed to prevent The cylinder-heads H are of peculiar construction. On their outer sides they are provided with the usual stuffing boxes, and on the inner sides with a cushioncylinder, or, in other words, with two chambers having a disk between them, only for different purposes. This head can be smoothly bored out without any trouble, and may be cast in a single piece; also within the cylinders are the semi-cylindrical valves D D to control the exhaiist-ports. These valves are provided with lugs d (1 upon their upper sides, between which the square portion of the rods 0 O is inserted. This square portion I lie screwed upon the rod and held in place by a jam-nut, or it may be made as apart of the rod. Thus the valve is prevented from turning by the square portion. At one end of the square portion is formed by an enlargement pistons ii, and upon the inner side of the heads are formed cylinder-sff, into which the pistons 'i loosely fit. The object of the piston and cylinders is to prevent the solid blows that would otherwise be struck upon the heads of the cylinders, which would injure them, by forming an air or steam cushion for the pistons. The saidcylinder confines the air to .a certain extent, so that when the pistons are moving rapidly the air or steam checks the momentum of the piston, and after the momentum is overcome the air or steam gradually escapes between the sides of the cylinders and the pistons, allowing the piston to comp lete.its stroke.

The arrow in full line represents the live steam, and those in dotted lines exhaust-steam and water of condensation.

The operation is as follows: Steamhas entered the right-hand side of the cylinder and had moved the piston to theleft, thereby closing the exhaust-porton the steam side and opening the oneon the exhaust side, holding the valves in this position untilsteam from the main cylinder enters at a, when the valves are shifted and the exhaust takes place from the other port. The projecting valve-rodsin- .dicate whether the device is operating or not.

What I desire to claim, and secure by Letters Patent, is

1. In an automatic cylinder relief-valve, the

combination of the cylinder with the piston and the valves, the valves and piston being Wholly contained within the cylinder, substantially as described.

2. In an automatic cylinder relief-valve, the combination of the cylinder with the piston, the adjustable valve-rods attached thereto, and the valves, substantially as shown and described.

3. In an automatic cylinder reliefvalve, the combination of the cylinder with the piston, the valves, the rod, and means for cushioning the same, substantially as shown and described.

4. 111 an automatic cylinder relief-valve, the combination of the cylinder with the piston, the valve, the valve-rod and cushioning-piston, and the cushioning-cylinder in the cylinder-head, as set forth.

5. In an automatic cylinder reliefvalve, the combination of the cylinder with the piston, the valve, the valve-rods projecting from the cylinder, and the exhaust and inlet ports, as set forth.

6. In an automatic cylinder relief-valve, the

combination of the cylinder having the main 25 piston and adjustable piston-rods, the cush- In testimony that I claim the foregoing as 5 my own I affix my signature in presence of two witnesses.

11108. M. FELL.

\Vitnesses:

O. DUFFY, F. R. HARDING.

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