US634277A - Steam-generator. - Google Patents

Description

No. 634,277. Patented 00L 3, |899. G.' W. SHIELDS.

STEAM GENERATUB.

(Application led Aug. 6, 1898,)

Patented oct. a, 1899.52 G. W. SHIELDS.

STEAM GENERAToR.

(Application med Aug. a, 189e.)

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GEORGE W. SHIELDS, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-FIFTH TO ROBERT M. KELLY AND ROBERT M. KELLY, JR., OF SAME PLACE.

STEAM-G EN ERATOR.

SPECIFICATION forming part of LettersPat-ent No. 634,277', dated October 3, 1899. Application tiled August 6, 1898. Serial No.6871906. (No model.)

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Beit known that I, GEORGE W. SH1nLDs,a citizen of the United States, residing at Louisville, in the county of Jefferson and State of 5 Kentucky, have invented new and useful Improvements in Steam-Generators, of which the following is a specication.

My invention is an improvement on the steam-generator invented by me for which ro Letters Patentofthe United States, numbered 110,298, dated December 20, 1870, were issued to me, and is hereinafter fully described, and illustrated in the accompanying drawings, in Which- Figure l is a side elevation with part of my steam-generating apparatus in vertical section to show the construction of valves and connections. Fig. 2 is a top plan View of the grate, tire-bed, and my steam-generating apzo paratus, showing their relations to each other.

Similarletters refer to similar parts throughout both views.

A represents the lire-bed; B, the boiler; F, the furnace, and E a series of lap-Welded pipes placed transversely in the fire-bed, commencing at the bridge-Wall ct and extending back to the after end of re-bed, as shown in Fig. 2.

O and D are check-valves (shown in vertical section in Fig. l) that control the flow of 3o Water in the series of pipes E.

H is a mud-drum placed transversely beneath the boiler, with which it is connected by the pipe or drum-leg h.

G is a circulating-pipe connecting the muddrum H, through the circulating-valve O and the connecting-pipe e, with the series of pipes E.

O is a vertical chamber placed at one side of the mud-drum H and connected with it by 4o the pipe g.

p is a cylindrical valve within the chamber O, controlling the aperture of the pipe g, and p' is a screw placed in the top of the chamber O for the purpose of closing the valve p when desired.

I represents the supply-pipe, through which the water forced into the lower part of the chamberO by the feed-water pump when the valve p is closed passes through the valve D,

5o the connecting-pipe e, the pipe series E, and

the pipe e into the boiler B, near the waterline. The valves C and D are arranged in reverse order, so that the action of one closes the other, and work automatically.

S is a blow-off cock to relieve the pipes of any sediment that may accumulate.

When the feed-pump is not Working, the water from the boiler passes down through the pipe or drum-leg h into the drum H and circulating-pipe G, thence through the valve C, and, closing by its weight the valve D, thence by the connecting-pipe e into the first of the series of pipesE at the bridge-wall, and, becoming heated, passes on through the series and, rising through the pipe e', empties into the boiler near the water-line, keeping up a constant circulation and entering the boiler always hot. When the feed- Water pump is working, the valve p in the chamber O is closed, and the water passing through the pipe I and the valve D closes the valve C and passes through the connecting-pipe e into the series of pipes E in the fire-bed and, becoming heated, rises through the pipe e into the boiler. There is no time that the pipes E are not full of water. Only one opening in a boiler is necessary to attach my improved generator, and only two other connections are necessary-one of the pipe G With the muddrum and one of the pipe I with the valve- Achamber O.

The valve-chamber O, connected with the feed-pump by the pipe I and with the drum H by the pipe g and containing a check-valve, is part of the usual means of supplying a boiler with Water. The screw p' for fastening down the valve is part of my device.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- 9o l. The combination with a steam-boiler, its furnace, and a discharge-pipe discharging into said boiler, of a feed-water-supply pipe, having an automatic check-valve, a circulatingpipe having an automatic check-valve at one end and its other end connected With the boiler, said check-valves operating reversely andby pressure as described, and abranch pipe connecting said feed-Water and circulating pipes together between said valves and extending to the inlet end of said dischargepipe, substantially as shown and described.

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2. The combination with a steam-boiler, its furnace, pipes E discharging into the boiler near the water-line and arranged to be heated by the furnace, a mud-drum, and a pipe leading from the boiler to the mud-drum, of a chamber having openings near its top and bottom, a pipe leading from the upper opening to said mud-drum, a valved circulatingpipe leading outward from said mud-drum, a valved supply-pipe leading from the lower opening in said chamber, a branch pipe leading from the space between the valves of said circulating and supply pipes to the inlet end of the pipes E, and a valve in said chamber having its seat between said openings, said valve having means for locking it to its seat against the pressure of inflowing water, substantially as described and for the purposes set forth.

3. The combination with the steam-boiler, it-s furnace, pipes E discharging into the boiler and heated by said furnace, a mud-drum, and

a pipe leading from the boiler to the muddrum, of a chamber having openings nearits top and bottom, a pipe connecting the upper portion of the chamber with the mud-drum, a circulating-pipe leading outward from said mud-drum, a supply-pipe leading from the lower opening in said chamber, said circulating and suppl)7 pipes having opposing ends, an automatic check-valve at each of said opposing ends, said valves being operated reversely and by pressure as described, a branch pipe connecting said supply-pipes together between said automatic valves and also leading to the inlet end of said pipe E, and a valve in said chamber having its seat between said openings.

Subscribed by me in the presence of two witnesses.

- GEORGE W. SHIELDS.

lVitnesses:

GEORGE A. JONES, J r., ALFRED E. BECKMAN.

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