US52286A

US52286A - Improvement in balanced slide-valves

Info

Publication number: US52286A
Authority: US
Publication date: 1866-01-30
Anticipated expiration: 1883-01-30

Description

UNITED STATES PATENT OFFICE.

VIRGIL D. GREEN, OF WATERTOWN, WISCONSIN.

IMPROVEMENT IN BALANCED SLIDE-VALVES.

Specification forming part of Letters Patent No. 52,286, dated January 30, 1866.

To all whom it may concern:

Be it known that I, VIRGIL D. GREEN, of Vatertown, in the county ot' Jefferson and State of Wisconsin, have invented a certain new and useful Improvement on Valves for' Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters and marks thereon.

As is shown by the drawings forming part of this specification, my improvement relates to the balanced D-valvc, said drawings representin g my invention, Figure l being a perspective view thereof, Fig. 2 being a longitudinal, and Fig. a transverse sectional, view ofthe same, in each of the iigures like marks and letters being used to indicate like part-s when shown.

A indicates a hollow valve with eductionports W W, and F F steam-pipes working through stuffing-boxes d d and glands U U, the pipes being for the purpose of conveying the steam to theA valves.

G is a balance -plug passing through the top of the valve, and made steam-tight by means of stuffing-boxes d d and cap or gland M M, and held in place by set-screw J, or its equivalent, through the medium of sector B.

The area of the steam-plug G is in excess of the area ofthe steam-ports W W sutticient to balance the pressure of steam from the cylinder and to hold the valve to its seat and prevent its lifting.

K is abridge to the valve, which may be at tached or detached as the different engines may require.

It E are brackets locked and bolted to the inside of the valve, as shown in Fig. 3 of the drawings, for bridge K to rest on when the valve is used for reversing engines-for instance, in locomotives, when it is necessary to reverse the engine under a high rate of speed. The dotted line in Fig. 2 above the bridge represents the bridge raised oft' the bracket R at one end, which will relieve the steam in the cylinder. The dotted line E in Fig. 2 indicates a side view of the bracket, being shorter at the top for allowing the bridge to rise without binding.

Q is a spring between bridge K andv balance-plug Gr, to keep the balance-plug against sector B when the steam is shut oft' and the engine is yet in motion.

I P indicate valve-seat; o o, steam-ports; L. the exhaust-port. The valve is represented as standing on the center with the ports closed.

H H is a steam-yoke bolted to valve-seat or cylinder. C U are steam-passages through the steam-yoke to steam-pipes F F, as indicated by arrows. C in Fig. 3 represents the junction of the steam-passages through the yoke.

I is a flange for the attachment ofthe steampipe.

N is a knuckle -joint for the valve rod connection; E, valve-stems working through boxes S, as shown in Fig. 1.

T is a box for the sector to work in, the bearing in the box being elongated, as shown by the dotted lines in Fig. 2, there being no sliding surface to need lubricating, as the sector rolls at the top and on the balance-plug G.

Instead of the pipes F F being used as recited and shown by the drawings, they may be attached to the yoke and work through stuffing-boxes in the valve, or be attached to the steam-plug by making the plug hollow.

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

1. The hollow D-valve provided with ports for conveying steam to the cylinder, and having steam-pipes F Fattached to it, subst-antially as set forth. I

2. The balance-plug G, in connection with the valve I), for the purpose of balancing th valve, as herein described.

3. The valve or balance-plug G, in combination with the setscrew J, sector B, and spring Q, or their equivalents, for adjusting the plug, as herein set forth.

4. The arrangement of the brackets It It and bridge K, detached from the valve, for the purpose of adapting the valve to and relievin g the steam in the cylinder in reversing engines, and allowing the use of the valve in non-reversing engines.

5. The steam-pipes F F, arranged and operated substantially as set forth.

This specification signed this 15th day of September, 1865.

VIRGIL D. GREEN. Witnesses:

J. A. HALL, CEAS. H. WILBER.