US625406A - Patrick meehan - Google Patents

Description

Patented May 23, |899. P. MEEHAN.

BILER.

[Application led June 3, 1S98.\

v2 Sheets-Sheet I.

(No Model.)

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No. 625,406. 'Patented may 23, |899.

P. MEEHAN.

BILER.

(Applx'mtion- 1 ed June 3, 1898.) (No Model.) 2 Sheetsi-Sheet 2.

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NiTnD STATES PATENT OFFICE.

PATRICK MEEHAN, OF LOVELLVILLE, OHIO, ASSIGNOR TO THE MEEHAN BOILER AND CONSTRUCTION COMPANY, OF SAME PLACE.

Bo'lLER.

SPECIFICATION forming part of Letters Patent No. 625,406, dated May 23, 1899. Application'fled June 3, 1898. Serial No. 682,427. (No model.)

To all whom, it 77u53/ concern:

Beit known that I, PATRICK MEEHAN, a resident of Lowellville, in the county of Hahoning and State of Ohio, have invented a new and useful Improvementin Boilers; and I do hereby declare the following to be a full, clear, and exact description thereof.

illy invention relates to steam-boilers.

One of the main objects of my inventionis to provide a vertical water-tube boiler so constructed that the bent tubes which connect the upper and lower drums may be uniform in length, which does away with the necessity of tubes of different lengths and bends.

My invention comprises the new and novel features set forth and claimed hereinafter.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accom panying drawings, in which Figure l is a sectional elevation of my improved boiler. Fig. 2 is a like view from the side. Figs. S and 4L are views showing the interior of the upper drum and the construction of the downflow-tubes. Fig. 5 is a cross-section of lower drum, and Fig. G is a plan view of mud-drum.

Like letters indicate like parts in each of the figures.

The letter d designates a suitable furnace having the grate-bars d and suitable openings for the introduction of fuel and the removal of ashes. The furnace, however, forms no part of my invention and any other suitable construction may be used.`

Extending up from the furnace et is the shell or casing b, which surrounds myl improved boiler, said casing having the smokestack b at the upper end thereof.

Fitted in the furnace ct are the drums c c', while at the upper end of the casing b is the drum d. These drums c, c', and d have the round ends e, but intermediate of said ends are the fiat portions f. The lower drums c c each have one such iiat portion f, while theV upper drum d has one on each side. These flat portions f have the openings forlned therein to receive the ends of the tubes 7L h. The

tubes h enter the openings in the drum c and the tubes 7L those in the drum c'. The upper ends of the tubes enter the iiat portions on opposite sides of the upper drum d. With the tubes bent in substantially the manner shown it is apparent that by the use of the fiat portions f all the tubes h h are of the same length and have the same bends. Furthermore, by having the tubes all of the same length there is no unequal expansion, and consequently there are no unequal strains. The iiat portions f do not, however, interfere with the strength of the drums, as they do not extend the entire length of said drums; but said drums have the regular round ends, which give strength and rigidity.

The downiiow-tubes i t" are preferably outside the casing b and enter the round ends e of the drums. The downflow-tubes t" extend up within the upper drum d to about the water-line, and the upper ends of said tubes are iiared outwardly, as at 7c. For the reasons more fully hereinafter set forth the upper ends of the tubes i' have the shields m.

l/Vithin the lower drums c c are the m'uddrums fn. These mud-drums are supported within the drums c c by the supports n'. The tops of thedrums '11, are perforated, and at each end thereof are the lids o, by means of which access may be had to said drums for purposes of cleaning. The lower ends of the downflow-tubes ft' t" enter the mud-drums n.

Leading from the drums c c are the blowoif pipes r, said pipes connecting with the main blow-off pipe r'. Blow-off pipes r2 lead from the mud-drums n into the blow-off pipes r of larger diameter, both of said pipes colnmunicating with the main blow-off r. By this construction the drums c c' and muddrums n may all be blown off at one time by simply turning a valve in the main pipe r.

The letter s represents the ordinary manhole, provided With the cover s', which is held in place in the ordinary manner by the bolt s2. Secured to the cover s' is the arm t, which has the roller t' journaled in its upper end. This roller t runs on the track t2, secured to By this constructhe interior of the drum.

tion when it is desired to gain access to the drum the cover is released from the bolt s2 and is then pushed back to the position shown in dotted lines, Fig. 4, the roller traveling on the track t2. In this manner all necessity for the handling and lifting of the cover is avoided, and as they weigh considerable and it is difficult and awkward to remove them the advantage is at once apparent. To adjust the cover in place again, it Ais only necessary to draw it back and apply the bolt, as before.

When my improved boiler is in use, the water and steam pass up through the tubes h 77, as said tubes are exposed to the direct action of the heated products of combustion coming from the furnace. As the tubes h h enter the upperdrum (Z intermediate of its ends, the Water in the upper drum will be raised when said tubes enter and will fall olf toward the ends, as illustrated by the dotted lines in Fig.

4. The water then descends by way of the doWnow-tubes z' i. As the tubes t" extend up within the drum CZ to about the Water-line and adjacent to the ends of the drum said tubes being unobstructed carry down the scum and other matter which floats on the surface of the water. The shields m, together with the daring ends of the tubes t', assist in the admission of a greater quantity of water to said tubes. The water passing down the tubes i enters the mud-drums n, and the sediment is deposited in said drums, the Water passing out through the perforations into the drums c c. In this manner the drums c c' are freed from agreat deal of sediment. The sediment once deposited in the mud-drums n cannot well escape, and the consequence is that the water circulating through the tubes is cleaner, and said tubes Will not clog up so readily. When it is desired to blow o the drums and mud-drums, it can all be done through the one main pipe.

All the tubes h h', or the upfloW-tubes, can `be made of the same length and bend, so that in constructing the boiler tubes of different lengths and bends do not have to be employed. This is a great advantage, as the tubes can be made and bent in large quantities and in less time, While at the same time if a tube is to be replaced it can be readily obtained. The dat portions for the insertion of the tubes being intermediate of the ends permits of the regular round ends on the drums, so that said drums are not weakened by said fiat portions, but the ends are rigid and firm.

What I claim as my invention, and 4desire to secure by Letters Patent, is-

l. In a boiler, drums having flat portions intermediate of their ends and round ends, and tubes connecting said drums, substantially as set forth.

2. In a boiler, drums having fiat portions intermediate of their ends and round ends, and bent tubes connecting said drums, substantially as set forth. j

3. In a boiler, upper and lower drums, tubes connecting same, a mud-drum in the lower drum having perforations therein, the downflow-tubes entering said mud-drum, substantially as set forth.

4. In aboiler, upper and lower drums, tubes connecting same, a mud-drum in the lower drum and communicating with the lower drum, the downflow-tubes entering said muddrums, a blow-off pipe leading from said lower drum, and a blow-off pipe leading from said mud-drum into said first-mentioned blow-off pipe, said blow-off pipes communicating with a main blow-off pipe, substantially as set forth. o i

5. In a boiler, upper and lowerdrums, tubes connecting same, the down flow-tubes having unobstructed openings and extending up Within the upper drum, substantially as set forth.

6. In aboiler, upper and lowerdrums, tubes connecting same, the doWniiow-tubes having unobstructed openings and extending up Within the upper drum to the water-line, substantially as set forth.

7. In aboiler, upperand lowerdrums, tubes 'connecting same, the doWnflow-tubes extending up within the upper drum, said downflowtubes having outwardly- Haring ends, substantially as set forth.

8. In a boiler, upper andlowerdrums, tubes connecting same, the down flow-tubes extend'- ing up within the upper drum, and shields at the upper ends of said downflow-tubes, substantially as set forth.

In testimony whereof I, the said PATRICK MEEHAN, have hereunto set my hand.

PATRICK MEEHAN.

IVitnesses:

RoBr. D. TorrEN, JAMES I. KAY.

IOO

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