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UNITED STATES f PATENT OFFICE.
SAMUEL D. S'IAUFFER, OF LANCASTER., PENNSYLVANIA.
STEAM-G EN ERATOR.
SPECIFCATION forming part of Letters Patent No. 461,454, dated October 20, 1891.
Application filed February 24, 1891- Serial No. 382,382. (No model.)
To all whom it may concern:
Beit known that I, SAMUEL D. STAUEFER, of Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvementsin Steam-Generators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to improvements in a sectional steam generator or boiler consisting of a hollow bottom section, hollow side and ond wall sections, horizontal tubes or pipes placed in the same vertical plane .connecting the end-wall sections, spiral coils of tubing joining the tops of the side-wall sections and the upper horizontal tube, spiral or conical -coils of tubing connect-ing the horizontal tubes in the vertical plane, and a removable hood or covering lined with some non-heatcondncting material to confine the action of the heat in the fire-box most directly to the arrangement of the coils and tubes, as will be hereinafter more clearly set forth.
The objects of the invention are manifold: first, the construction of a boiler in sections,
vso that the separate parts can be packed vompactly for shipment and readily set up at destination: second, that the several individual parts may be readily exposed for cleaning or repairs; third, having a great area of heatingsurface in a small place, and, fourth, dispensing with the usual crown-sheet.
The purposes of the invent-ion are attained by the devices illustrated in the several views of the accompanying drawings, in which similar letters of reference designate like parts throughout, and in which- Figure l is a front end elevation of a sectional steam generator embodying the elements of myinvention, the fire-box and ashpit doors removed; Fig. 2, a vertical crosssection, through the outlet-tube, showing the connecting-coils in full lines in place; Fig. 3, a view from the right of Fig. l, partially in sect-ion, to show the inside arrangement of the parts; Fig. 4, a perspective view of portions of a side and end wall detached, showing the opening in the end wall where the two are joined; and Fig. 5, a detail view showing one it a ridge or bead a', forming'a recess adapted to receive an end b of the hollow side walls B and B', while bolts b', extending through the end walls and longitudinally within the side walls, serve, by means of nuts b2, screwed home, to bind the parts together. These bolts may be omitted and any other approved means for attaching the parts may be used instead. v
Centrally located and in the same vertical plane are two pipes or tubes C and C', their ends itted into recesses a2, formed about oriflces through the inner faces of the end walls A and A. The pipe C, situated in the ridge, becomes the steam-drum, and the pipe C', eX- tending through the fire-bed, becomes water or fire pipe ofthe boiler, while bolts c and c', by means of their respective nuts, screwed home, serve to bind the parts together. Packingrings C2 are used to complete these joints, and the joints of the side and end walls may also be packed.
A number of flattened conical coils D of tubing connect the ridge pipe or drum C and the fire-pipe C. These coils are placed vertically and at desired intervals throughout the length of the boiler, and c2V designates the places where the extremities of the coils are joined to the respective pipes.
A numberof coils E of tubing connect the tops of the side walls B and Bwith the ridge pipe o'r drum C. These coils are shown inclined in the drawings, and are placed at desired intervals throughout the length of the boiler, and b2 designates the places where their lower ends are attached to the top of the respective side Wall B or B', while c3 indicates the places Where their upper ends join the ridge pipe or drum C.
Vhen an increased area of heating-surface is desired, coils may be doubled, asis clearly e shown in Fig. 5, where one coil E is placed IOO within another coil E2, and the conical coils D may likewise be doubled. Any number of coils may be thus hunched.
While the coiled connections j ust described are preferred, they may be dispensed with and horizontal tubes used in place, said tubes joining the front and the rear end walls A and A and bound together, as in the case of the pipes C .and C just described; but a bolt need not be passed through every tube. This construction being so evident,its illustration was deemed supertiuous.
F shows a portion of an outlet-tube, which is attached to one of the bosses c4 on the upper side of the steam-drum C, forming an outlet for the eduction of steam or heated water to the place where either is to be used. This outlet-tube may be attached to bosses on the outer face of either end wall, as at a3, near the top of the wall A in Fig. l, while G shows a'portion of an inlet-tube through a boss a4 near the bottom of the same-wall, forming an inlet for the induction of -return matter or water into the body of the boiler. This inlet-tube may also be applied to any of the bosses b3 shown near the bottom of either of the side walls.
I-I shows a fire-grate consisting of the usual grate-bars h, placed longitudinally from front to rear of the generator and immediately below the fire-pipe C', Awhere the extremities of said bars rest on abracketor projecting ridge d5, integral with the inner face of each end wall A or A. The grate divides the interior of the boiler horizontally into two compartments, O being the fire-box or combustionchamber, and O the ash-pit or air-chamber, while o' indicates the doorway or fuel-inlet to the former, and o the doorway or ash-outlet to the latter, both of which may be closed by doors in the usual manner, and'o2 indicates the smoke-outlet from the combustion-chainber through the rear wall A of the boiler. Y
Any other tire-grate of approved construction may be used in this connection, and all grates may be dispensed with or used in a modified form when either natural or manufactured gas is used as fuel, or any vapor- A above the side walls B and B and between the upper portions 0f the end walls A and A. Each section of the hood is formed 0f metal sheeting fi', lying on the upper edges of the end walls and extendingfrom the ridge of the boiler down over the sides to a point a little below the top of the respective side walls, where the lower edge of the section rests on lugs or projections b3, placed at intervals against the outer face of said side wall, and the sheeting has a flange t2 along each side edge projecting downward over the outer face of the'end wall, along which the flange eX- tends, and the lining is, which consists of any non-heat-conducting material, like mineral wool or asbestusfelt, and is securely attached to the under side of said sheeting by means of Wires 4, laced through the eyes of asbestus buttons 'i5 and through punctures t in the sheeting.
K designates a metallic base on which the generator stands; but this base may be deep# ened and made hollow and openings -made from below through their bottoms into the side and end walls of the boiler, said opend ings to register with similaropenings through the upper face of the hollow base where said walls stand, as is clearly indicated by dotted lines K in the drawings, Figs. l, 2, and 3.
When desired, the met-al base may be dispensed with and the generator stand on a cement or on any other approved floor; but in this case, as well as when a solid metal base is used, there will be no openings in or through the bottoms of theseveral wall-sections.
lt will here be observed that by the construction and junction of the several parts, as described, the device forms a complete watercircuit throughout and that all pressure arising from the generation of steam or the heating of water is confined to within these parts; that this pressure, being' thus confined, the usual crown-sheet is dispensed with, and that the linedhood or bonnet serves to confine the action of the `heat in the fire-box directly to the parts; that fixing the water-level at about the point p the parts above said point become a superheater and that steam may be made dry; that fixing the water-level at about the point ,q will give the effect of an ordinary steam-boiler, and that by filling the entire device, together with the outlet and return pipes, with water it will become a hot-water circulator or heater; but in all cases, owing to the small quantity of water confined therein and the large area of heating-surface acting thereon, the device is a quick generator of steam or a rapid circulator of heated water, and always with the greatest economy or saving in fuel.
It will also be observed that my generator is equally as well adapted to high-pressure or IOO engine purposes as it is forheating, for it Y may be provided with the usual gages and levels or other means for safety, as well as with the usual appliances for regulating the draft.
Having now described the invention and fully set forth its application, what I do consider new, and desire to secure by Letters Patent, is-
1. The herein-described sectional boiler having no crown-sheet, consisting of hollow bottom, hollow side, and end wall sections, the sections joined, as shown, and having continuous internal communication, a horizontal pipe in the ridge and a horizontal pipe in the fire-bed connecting the interior ofthe hollow end-wall sections, coils of tubing connecting the interior of the horizontal pipes, coils of of ashes and for regulating the draft, all substantially as described, and for the purpose set forth.
2. The combination, iu a steam-generator having no crown-sheet,with a water-wall consisting of hollow end-wall sections, hollow side-Wall sections at the base, a drum at the ridge, and a water-pipe in the fire-bed, connecting the interior of the end-wall sections, and means provided for holding the sections together, of a non-heat-conducting hood resting on the upper edges of the end andside wall sections, 'covering the space between said sections, whereby a combustion-chamber is formed, substantially as described, and for the purpose set forth. Y
3. The combination, in a steam-generator, with a water-wall consisting of hollow endwall sections, hollow side-wall sections at the base, a drum near the top, and a water-pipe in the fire-bed, connecting the interior of the end-wall sections, and means to hold the sections together, of a tubular outlet lfrom the drum, a tubular inlet near the bottom, and tubular return connections joining said outlet and inlet, wherebya circuit hollow throughout is formed, substantially as described, and for the purpose set forth.
4. The combination, in a steam-generator, with a water-Wall consisting of hollow end sections, hollow intermediate side sections below, an intermediate drum above, and an intermediate water-pipe in the tire-bed, connecting the interior of the end sections, and means to hold the sections together, of a series of coils of tubing connecting the interior of the drum with the interior of the water-pipe, substantially as described, and for the purpose 'set forth..
5. The combination, in a steam-generator,
water-pipe in the ire-bed,'connecting the interior of the end sections, means to hold the sections together, and vertical tubular connections between the interior of t-he drum above and the interior of the water-pipe below, substantially as described, and for the purpose set forth.
6. The combination, in Aa steam-generator, of hollow end-wall sections,intermediate hollow side-Wall sections connecting the interior of the lower portions of the end-wall sections near their outer ends, an intermediate drum above and an intermediate water-pipe below, said pipe and drum having vertical tubular conical coil connections between themLand said drum and pipe connecting the interior of said end-wall sections, and tubular connections With the interior of the hollow side-Wall sections below and the interior of the drum above, substantially as described, and for the purpose set forth. f
7. The combination, in a sectional steamgenerator, of the hollow front and rear end sections, hollow intermediate side sections connecting the interior of the lower portions of said end sections, an intermediate steamdrum connecting the interior of said endsections near their tops, an intermediate waterpipe `connecting the interior of said end sections below, a series'of conical coils of tubing connecting vertically the interior of said steam-drum with the interior of said Waterpipe, and a series of spiral coils of tubing connecting the linterior of the drum above with the interior of the intermediate side sections below, substantially as described, and for the purpose set forth.
In testimony whereof I have hereunto subscribed my name in the presence oftwo subscribin g witnesses.
SAMUEL D. STAUFFER.
HENRY C. MUssER, DANL. H. HERR.