US524391A - Charles d - Google Patents

Description

-('No Model.)

l 2 sheets sheet 1. G. D. MOSHER. BUILBR ORSTBAM GENERATOR.

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(No Model.) 2 Sheets-8heet 2. v G. D. MOSHER.

BOILER 0R STEAM GENERATOR.

' No. 524,391. v Patented Aug. 14, 1394.

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" UNITED STATES PATENT OFFICE.

CHARLES D. MOSHER,

OF NEW YORK, N. Y.

BOILER OR STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 524,391, dated August 14,1 894.

V Application filed January 7,1393. Serial No. 457.603. (No model-) To aZZ whom it may concern.-

Beit known that I, OHARLEsD. MOSHER,

of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Boilers or Steam-Generators, of which the following is a specification.

This invention relates to that class of boilers or steam generators, in which a water drum or receptacle located at or near the level of the grate is connected by a plurality of tubes with a steam drum or receptacle 1ocated at a higher point, the said tubes being arranged so that theircontents will be subjected to the heat of the fire, as shown in Letters Patent of the United States, No. 432,7 60, granted to me July 22, 1890. 'In'the generator shown in said patent, two water drums and two steam drums are employed, the drums extending lengthwise of the furnace.

Mypresent invention has for its object to provide a generator of the class above indi- 'cated, of more compact and less expensive construction than those heretofore made, and to this end the invention consistsin the im: provements which I will now proceed to describe and claim.

Of the accompanying drawings, forming part of this specification: Figure 1 represents -a front elevation of my improved boiler, a

portion of the casing being shown in section.

Fig. 2 represents a longitudinal section on line 22, Fig. 1. Fig. 3 represents a top plan view, showing a portion of the casing in section. Fig. 4 shows a detail perspective sectional view illustrative of a separator device employed in the steam drum.

The same letters and numerals of reference indicate the same parts in all the figures.

In the drawings: a represents the grate of the furnace or fire-box, the same being contained in a-suitable casing, composed of the sides 2 2, front end 3, rear end 4 and top 5.

22 represents the water drum, which extends across the fire-box at one end of the grate, the lower side of the drum being preferably at or near the level of the top of the grate.

0 represents the steam drum, which is 10- cated'at the opposite end of the fire-box from the water drum and at a higher point. The

steam and water drums are substantially parallel with each other, and both are arranged at right angles to the direction of the length.

d d 01 represent the group of tubes which connect the upper portion of the water drum with the upper portion of the steam drum.

Said tubes are bent to form. loops, each of which, occupies a vertical plane extending lengthwise of the fire-box,

the tubes being bent so that their lower portionsare inclined from the water drum toward the front end of the fire-box, while their upper portions ex-,

tend in a substantially horizontal, or if preferred slightly inclined direction along the upper portion'of the casing, their intermediate portions being inclined upwardly from casing, all as and constitute a close wall of. tubes, extend ing from the front wall of the casing back to the point f, from which point to the steam drum the tubes (1 are separated by spaces e The tubes at at the opposite side of the group are arranged in close proximity to each other, and form a closed wall of tubes extending from a point near'the water drum nearly to the steam drum, the ends of the tubes 61' that .join the steam drum being separated by spaces 6 which permitthe esoapeof the products of combustion to the stackorchimney g. Thearrangeinent of the tubes in loops, each occupying avertical plane and extending lengthwise of the fire-box, enables each tube to have a considerably greater length than has been possible under the arrangements heretofore adopted, so that I am enabled to obtain a much greater area of heating surface in a generator of a given size than heretofore. This result is due to the 5 products of combustion to the space between parts of the fire. The close wall formed by the tubes (1 at the back side of the group retains the products of combustion within the space between the tubes (1 and 01' until they reach the chimney, while the close wall formed by the intermediate inclined portions of the tubes 61 at the opposite side of the group interposed between the fire and the steam drum protects the latter against injury from the heated gases in case the steam drum should accidentally become empty. The steam drum is additionally protected by a partition i, which may consist of asbestos or other nonconducting material, and is suitably aifixed to the front Wall of the casing and to the rear portion of the steam drum. The elongated openings 6 between the lower inclined portions of the tubes 01 permit free access of the the tubes d (1' along the entire length of the fire-box.

The described form of the tubesd d 01 provides a deep recess extending backwardly from the steam drum,as shown in Fig. 2. I utilize this recess for the reception of a substantially horizontal hollow arm 0' extending from the steam drum into said recess and communicating with the interior of the steam drum. Said arm is preferably composed of a length of tubing, one end of which is closed,

and the other end flanged and secured by riveting or otherwise to the steam drum. The arm is connected by bent tubes d which communicate at their lower ends with side return pipes 12', which,with the vertical return pipes 12 constitute connections conducting the return water from the steam drum 0 to the water drum b, the horizontal pipes b extending along the opposite sides of the fire-box, substantially at right angles with the steam and water drums. The tubes d are connected at their lower ends with the horizontal return pipes b, and at their upper ends with the arm 0. The upper portions of the tubes 01 are bent inwardly, as shown in Fig. 1, the row of tubes rising from one ofthe pipes b being bent inwardly in one direction, while the row of tubes rising from the other pipe I) are bent in the opposite direction.

It will be seen that the tubes d largely increase or add to the heating surface of the boiler, and obviate the necessity of usingfire brick at the sides of the fire-box to protect the sides of the furnace. The steam generated in the tubes 01 passes to the steam drum through the arm a.

The steam drum is provided with a steam separator, which comprises a pocket It, affixed to the interior of the steam drum, and

a scroll-shaped continuation or extension of said pocket, composed of a series of slats 7c separated by slots or openings and an imperforate inner portion k The pocket It is closed at its bottom and ends, and is arranged to receive all the steam and water delivered by the tubes. The slotted part of the scroll communicates with the upper edge of the pocket, and receives steam and water therefrom, and constitutes a scroll-shaped passage, leading to a steam-pipe m, which conducts steam from the generator to the engine. The steam, in passing through the slotted portions of the scroll, parts with the entrained water by centrifugal action, the water being thrown outwardly and escaping through the slots, the steam reaching the imperforate inner portion of the scroll and passing from thence'through the pipe m.

I 'claim- 1. In a boiler or steam generator, the combination of a furnace or fire box, a water drum located at the rear end of the fire box, a steam drum located at the front end of the fire box, said drums extending across the fire box, a group of curved tubes connecting the upper portion of the water drum with the upper portion of the steam drum, said tubes being bent to form loops disposed in vertical planes extending lengthwise of the fire box, return pipes extending vertically downward from the steam drum alongthe front of the fire box and horizontally along the sides of the fire box to the water drum, and side tubes springing from the horizontal portion of the return-pipes and extending along the sides of the fire-box and constituting a lining therefor as set forth.

2. In a boiler or steam generator comprising a steam drum, a water drum and tubes ends and lower edge, and is arranged to receive the steam and water delivered by the tubes, a scroll shaped separator at the upper open edge of said pocket, the outer portion of said separator being composed of longitudinal slats separated by slots while its inner portion is continuous or imperforate, and a steam pipe extending from the inner portion of the separator through the wall of the steam drum, as set forth.

3. In a boiler or steam generator, the combination of a furnace or fire-box, a water drum located at one end of the same and extending crosswise of the fire-box, a steam drum substantially parallel with the water drum and located at a higher point, a plurality of curvedilr 2 v steam drum into said recess,-h0rizonta11y arname to this specification, in the presence of ranged return pipes at the sides Qftn'e fire: two subscribing witnesses, this 27th day of box, and bent tubes connecting said return December,- A. D1892. 1

V pipes 'withsai'd arni, said tubes increasing CHARLES D. MOSHER. v 1 5 theheaiting surface and protecting the sides Witnesses: v

pf the furnace, as set forth. 0. F. BROWN, -.In testimony whereof I have signed my k A. D HARRISON.

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