US560848A - Water-heater - Google Patents

Description

' (No Model.)

W. J. EDWARDS.

WATER HEATER.

No. 560,848. Patented May 26, 1896.

B. GRAHAM. PNOTOAUTHU- WAS H l NGTU N. DE.

NITED STATES PATENT Prion.

WATER-HEATER.

SPECIFICATION forming part of Letters Patent No. 560,848, datedMay 26, 1896.

Application filed September 12, 1895. Serial No. 562,286. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM J. Enwnnns, of Chicago, inthe county of Cook and State of Illinois, have invented certain new and useful Improvements in ater-Heaters; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in gas water-heaters more especially intended for use in heating the contents of upright kitchen-range tanks and the like.

One principal object of the invention is to provide a construction in tubular water-heaters calculated to give the water to be heated a more than ordinarily advantageous circulation with respect to the parts to which external heat is applied.

Another principal object is to make such construction in the form of an integral casting containing only screw-joints, whereby'absolute exemption from leakage may be assured Still another object is to provide for the more complete utilization of the heat of the gas-burner, the parts being so constructed and arranged that after the jet-flames have acted upon the tubesof the water-heaterthey and the products of combustion may pass on and act effectively upon the bottom of the tank with which the heater is connected.

Simplicity of construction and consequent reduction of cost in making, assembly, and repair is also aimed at, as will appear more fully from the detailed description.

shown in central vertical section.

The invention consists in the matters hereinafter described, and more particularly pointed out in the appended claims, and it will be readily understood from the following description of the accompanying drawings, which represent the best embodiment of my invention now known to me.

In the drawings, Figure 1 is a view of the lower portion of an ordinary kitchen-tank with my invention, the tank and heater being Fig. 2 is a top plan View of the heater, the inlet and outlet pipes being shown in horizontal section and portions of one end being broken away to reduce the size of the figure. Fig. 3 is a horizontal sectional view taken in the line 3 3 of Fig. 1 and looking in the direction of the arrows. Fig. 4 is a transverse vertical sec tion taken in the line 4 4 of Fig. 2. .Fig. 5 is a front end elevation of the heater. Fig. 6 is a bottom plan View of the front end portion of the heater.

Referring to said drawings, A designates as a whole a kitchen-range tank of conventional form, comprising an' upright hollow cylinder A, supported by an open-topped standard A At the center of the bottom A of the tank is formed an aperture within which is threaded one end of a nipple or short tube A, the protruding end of which is exteriorly screwthreaded, as seen at a.

B designates the water-heater as a whole, which is shown as when made entirely of cast metal and in a single jointless piece. Said heater comprises as its principal features a plurality of parallel water-tubes B B, ar-

municating with the central portions of all of the parallel tubes 13 excepting the outer ones, which communicate with the upper chamber B At the center of the upper chamber B is formed a boss or hub b, which is centrally tapped at b to receive the nipple A said nipple at once serving to support the heater from the tank and to give communication between the lower part of the tank interior and the chamber B of the heater. A somewhat similar boss 19 is provided at the center of the lower wall of the lower chamber B and through this is tapped an aperture 1)", smaller than that of the upper chamber and in axial alinement with the latter. The'aperture 17*,

The circulation of the water from the boiler to the heater, through the latter, and back to the boiler is asfollows: The colder, and therefore heavier, water at the bottom of the boiler passes down through the nipple to the central upper chamber B and thence laterally outward at opposite sides of the chamber through the passages B to the outer ones of the parallel tubes B. Here the water again divides, going in opposite directions through said-outer tubes to the end headers B from which latter it flows through all of the inner ones of the parallel tubes to the lower central chamber B as indicated clearly by the arrows in sectional Fig. From the lower chamber the water rises through the pipe 0 to the upper part of the tank or boiler.

B B designate depending flanges, preferably and as herein shown formed integrally with the outer sides of the headers B and extending some distance below the lower surface of the parallel tubes, the purpose of said flanges being to form the side walls of a housing surrounding the burner. Said flanges are extended a short distance beyond the ends of the main body of the heater at each end thereof and their extreme vertical end margins turned at right angles inwardly to form retaining-flanges B B between which and the body of the heater removable end plates D D are placed by sliding them Vert-ically down with their end margins engaged with the ways b 1), formed between said flanges B B" and the body of the heater. The upper edges of the end plates are provided with inturned flanges B B, which limit their downward movement when the proper position is reached, the lower margins of said end plates being arranged to extend down coincident with the bottom margin of the side flanges B B when the flanges B B rest in contact with the upper surface of the heater, thus forming, with the side flanges B B, a valance extending entirely around the heater.

E E and E E designate a plurality (in this instance four) apertures arranged in a series extending across the lower side of each end plate D D, the several apertures of one plate being arranged opposite those of the other. The apertures E E of the plate D are preferably round and of proper size to receive loosely therein tubular burners F,while the apertures E of the plate D are smaller and of rectangular form to receive the correspondinglyshaped ends of bosses f, formed on the end caps or closures F of the said burners, thus serving both to support the ends of the burnertubes and to prevent said tubes from turning in their supports. The burner-tubes are thus supported immediately beneath the waterspaces of the heater and are of such length as to extend the full length of the heater and protrude some distance at the front or that end provided with the round supporting-apertures E. The upper sides of the portions of the tubes within the heater are provided with a plurality of evenly-distributed jet-openings f f The outer end of each burner-tube is provided with a reducing-cap f having a central aperture f of less diameter than the interior diameter of the tube, said apertures f being severally adapted to receive the ends of short branch gas or vapor supply pipes or nipples g, connected with a main supply-pipe G, which extends transversely across the end of the burner. The main supply-pipe G is suitably capped or closed at one end g, while its other end is adapted for connection with any suitable source of fuel supply. Each of the burner-tubes F is transversely slotted or provided with an aperturef located approximately opposite the end of the inlet-nipple g, and preferably upon the under side of the burner, through which slot air is entrained by the jet of gas issuing from the inlet-pipe g. The interior of the burner-tube thus per forms the function of a mixing-chamber. In order to hold the burner-tubes in position within their bearings in the end plates and at the same time support the supply-pipe G against the ends of said burner with the nipples thereof projecting within the latter, a bracket II, provided with a hooked end 11, which engages the supply-pipe G, is secured to the outer face of the end plate D by means of one or more suitable screw-bolts h. It will be obvious from the foregoing that by simply loosening and removing the bracket H the supply-pipes may be removed, the burners Withdrawn, and the end plates removed, thus separating the heater and its several individual parts.

J J designate screw-plugs employed to close the core-holes necessary for casting the hollow parts of the heater integral and aifording access to the interior to remove sediment.

I I designate igniting-apertures in the end plate D, through which the several burners may be conveniently lighted after the gas or vapor has been turned on.

The water circulation of the burner having been described need not be here repeated. It will be obvious, however, that a very large amount of heating-surface is provided, and also that the water in its circulation from the point at which it enters the heater constantly approaches a hotter and hotter part of the heater in its tortuous passage through the latter until it finally reaches the exit-pipe at the center and hottest part of the heater. This arrangement greatly facilitates and augments the circulation of the water, and the latter is therefore rapidly raised in temperature. Furthermore, all the products of combustion,after having acted on the heater, pass upward through the spaces between the watertubes and act upon the concave bottom of the tank, thus further aiding in heating the water.

The construction set forth, in which the entire heating-coil is cast integral and contains only screwjoints, is a feature of importance, inasmuch as it is comparatively easy to make screw-joints fit and remain perfectly tight in use, while in the case of rectilinear joints and scams it is very difficult to do so, and leaks are of common occurrence.

I claim as my invention- 1. A tubular water-heater provided with a centrally-located top inlet above a series of connecting-tubes, passages leading radially outward from said inlet to the outer tubes, and a centrally-located exit-opening communicating with the inner tubes, substantially as described. I

2. A water-heater provided with a centrallylocated top inlet, a passage leading radially and horizontally outward from said inlet and communicating with a return-passage, said return-passage being arranged in a horizontal plane below and parallel with that of the outward passage,and a centrally-located exitopening communicating with said return-passage, substantially as described.

3. A tubular water-heater provided with a centrally-located top inlet, passages leading radially and horizontally outward from said inlet, a plurality of tubes or return-passages communicating with said outward passage, and a centrally-located exit-opening with which said return-passages communicate, substantially as described.

4. A tubular water-heater provided with a centrally-located top inlet, a passage leading radially outward from said-inlet, and a plurality of tortuous return-passages communicating with said outward passage, and a centrally-located exit-opening with which each of said return-passages communicates, substantially as described.

5. A water-heater provided with a centrallylocated inlet, a passage leading radially outward from said inlet, and a plurality of return-passages communicating with said outward passage, openings extending through the heater between said return-passages, and

a centrally-located exit opening through which each of said return-passages communicates, substantially as described.

6. A water-heater provided with a centrallylocated top inlet, passages leading radially outward from said inlet, a plurality of watertubes arranged parallel with each other, transversely of said radial passages, header-chambers at each end of said parallel water-tubes, with which the latter communicate, passages connecting said radial passages with said heaters, and a central eXit-openin g with which said parallel water-tubes communicate, substantially as described.

7. A water-heater provided with a centrallylocated top inlet, passages leading radially outward from said inlet, a plurality of watertubes arranged parallel with each other transversely of said radial passages, intervening spaces between said parallel water-tubes, header-chambers at each end of said parallel tubes with which the latter communicate, passages connecting said radial passages with said headers, and a central opening with which said parallel water-tubes communicate, substantially as described.

8. A water-heater provided with a centrallylocated upper inlet-chamber,passages leading radially and horizontally outward from said inlet-chamber and communicating with a plurality of return-passages arranged in a lower horizontal plane, a centrally-located lower chamber with which each of said return-passages communicates, and an exit-pipe leading from said lower chamber upwardly, said heater being formed of a single integral casting, substantially as described.

9. The combination, with a tank having an exteriorly-concave bottom, of a water-heater arranged beneath and adjacent to said concave bottom and provided with a centrallylocated upper inlet-chamber communicating with the lower part of said tank, passages leading radially and horizontally outward from said inlet-chamber, a plurality of returnpassages arranged in a lower plane parallel with and communicating with said outward passages, a centrally-located lower. chamber with which each of said return-passagescommunicates, and an exit-pipe connected with said lower chamber, passing upwardly through said upper chamber and the inletopening thereof and communicating with the upper part of the tank, said exit-pipe being of less exterior diameter than the diameter of said inlet-opening, substantially as described.

10. A water-heater comprising a heatingcoil arranged in a horizontal plane, intervening spaces between the parts of said coil, a depending flange surrounding said heatingcoil, and a burner arranged beneath the coil, substantially as described.

11. The combination with a tank having a concave bottom, of a water-heater arranged beneath and adjacent to said concave bottom and provided with an inlet-opening, a heatin g-coil arranged in a horizontal plane, communicating with said inlet-opening, intervening spaces between the parts of said coil, a depending flange surrounding said heatingcoil, and a burner arranged beneath the coil,

WILLIAM J. EDWARDS.

Witnesses:

ALBERT H. GRAvEs, WILLIAM L. HALL.

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