US534A - Improved steam-generator - Google Patents

Description

NITED 'STATES PATENT Critica,

WILLAM CREED, OF BOSTGN, MASSACHSET'IS.

IMPRQVED STEAM-G EN ERATOR.

Specification forming part of Letters Patent N o. 534, dated December 26, 1837.

To all whom, it may concern.-

Beit known that I, WILLIAM CREED, of Boston, 1n the county of Suffolk and Commonwealth of ll/Iassachusetts,have invented anew and useful Improvement in the Steam-Boiler which I call Creeds Patent Steam-Generator, and I do hereby declare that the following is a full and exact description.

The improvement consists of the following parts, viz:

Reference being had to the drawing, y is a cast-iron head, being a portion of a globe made fast to the shell orouter casting (marked A and B) and east with holes or sockets to receive theiends of the tubes, (marked 17,) said holes `to be largest 'at the bottom and tapering gradually to the top, and to be of a number and size corresponding to the number and size of the tube, as hereinafter described, and said head must be of proper size and thickness, according to the power of the engine required. The tubes to be inserted into the head y are for the conducting of fire, heat, and smoke, and are cast of iron in one entire piece, communicating together in a neck at the top, which neck communicates with the box or drum C. The number of tubes thus cast together may be three, four, or more, according to the size of the boiler, and are fixed in sets from near the center outward, being smaller toward the center and increasing in size toward the circumference in the proportion drawn iu that part of the drawing marked Plan of cast-iron head and Section from A to B one-quarter size. The bottom of the tubes is .cast bell-mouthed of such size that the bottom of the bell will enter from above at the top of the holes in the head, and above the bell-shaped part is a flange or nest for the tubes, which more than covers the top Qf the holes in the head. The tubes, being inserted into the head, are to be firmly secured by iron or any fire-proof cement, Well calked up from belowto the anges 011 the tubes. The form of the bottom of the tubes and the holes with the spaces to receive cement (marked or) are shown in that part of the drawing marked section from A to B. The sets of tubes thus cast together and fastened into the head at the bottom and fixed to the box or drum at the top by securing the necks with a ange and common lead joint made fast by Vfour bolts or screws, (marked l 1 l in the drawat their upper ends, so as to form one common orifice at b4, where they are connected to the drum C by a fiange and screws. The head is secured by bolts to the outer shell or casing, so that in case'of cracks or accidental injury it may be easily taken out and replaced. The

.box or drum C is of cast-iron in the proportion of No. l and No. 3 in the drawing and hollow in the center, with a hole in the top of a proper size to receive the funnel d, and with holes to receive the necks of the tubes, which holes run from the circumference into the cavity in the center. There are in the topof the box or drum two man-holes (marked 71,) for the convenience of clearing away soot or other obstructions, or for placing or removing` the tubes, as hereinafter described. Should any one of the tubes or the whole set become damaged by long use or accident, they may be removed by a person entering the manhole Z of the whole boiler or shell and the man-hole 71 of the box and screwing off the bolts l l l which confine the necks of the tubes by anges, and then the cement of the bottoms being cut out or the bottoms being broken off the set of tubes may be turned onequarter round and drawn out at the man-hole Z, and another set may be put in itsplace in the same lnanner as at first, when the repair will be complete.

The smoke-funnel (marked d) has two joints of cast-irou of an oval form, in order to give room each side for the man-holes of the box. One joint is fastened -by a fiange to the box and turns, as in the drawing, to the inner side of the shell or outer case, where it meets it with a ange. The other joint has a flange to match that of the first joint, and they are to be bolted together through the shell, which is cut to allow the escape of the smoke. The second joint then turns upward, so that a'sheetiron ue may be affixed to it perpendicularly,

and the sheet-iron may be con lined to the joint, either bya flange or any closeshuttin g joint, as may be convenient.

rlhe remaining parts of a complete boiler are of the common form well known to all competent steam-engine builders.

A B is the case or shell containing the water below around the tubes and the steam above the water-liue.

Z is the man-hole at the top of the boiler.

: is the steam-pipe and safety-valve.

g g g are th ree gage-cocks at different levels to ascertain the height ot the Water.

m is the feed-pipe running through the side of the shell and turning down in the center between the sets of tubes to a proper distance from the bottom. i

o is a bottom man-hole for cleansing and repairing.

q is the furnace-door.

p is the furnace.V

fr is the bars or grating upon which the fuel is thrown.

u is the grate or sitter for ashes.

t is the ash-pit.

n in No. 2 is a valve for admitting cold air.

on in No. l is the blow-01T pipe or cock.

s is a soapstone or any other fire-proof lining for the furnace.

e is the soot-door for cleansing' the funnel.

I is the damper in the funnel.

By reference to the drawing, which is a part of this specification, tte whole construction, arrangement, and adapt-ation of the different parts will be immediately understood by any person versed in this branchof mechanics.

The advantages and characteristics of this improved steam-generator are as follows: It is simple in its construction, easily built, and

easily repaired by having extra sets of tubes at hand. It is cheap, the extra work and materials over a plain boiler being but trifling. Itis durable, for, being` of cast-iron of adequate thickness, it will not soon burn out, is not injuriously affected from its form by expansiou and contraction, nor will it be liable to bursting, breakage, or collapse. It is adapted for any kind of fuel-wood or soft coalbut is capable of being used to peculiar advantage With hard coal. lt exposes a large surface of heated metal to the Water, and in all other respects is as simple, plain, and safe as a common boiler. It is portable, for from its construction upon arches of cast-iron, (not heretofore mentioned, but shown in the drawing,) without the expense of brick-work or extra construction, the boiler can be moved Jfrom one place to another, in a building or boat, with little expense or inconvenience, and without taking it in pieces.

The improvement desired to be secured by Letters Patent consists in constructing of two or more tubes in sets of one piece, uniting at their upper ends in one common orifice, where they are connected with a drum terminating in a smoke-pipe, the whole being constructed, combined, and arranged substantially in the manner herein described. g

In testimony whereof I, the said WILLIAM `CREED, hereto subscribe my name, in the presence of the Witnesses whose names are hereto subscribed, on the 4th day of December, in the year of our Lord 18257.

WILLIAM CREED.

Vitnesses:

CHAs. H. LocKn, A. MOORE.

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