US1015314A - Instantaneous water-heater. - Google Patents

Description

G, H. HARRINGTON. INSTANTANEOUS WATER HEATER.

\ APPLICATION FILED APR,5, 1909.

Patented Jan. 23, 1912.

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G. H. HARRINGTON.

INSTANTANEOUS WATER HEATER. APPLICATION FILED APR.5, 1909,

1,015,314, Patented Jan.23, 1912.

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- UNITED STATES PATENT orrson.

GEORGE H. HARRINGTON, OF CINCINNATI, OHIO.

'INSTANTANEOUS \VATER-HEATER.

Specification of Letters Patent.

Patented Jan. 23,1912.

Application filed April 5, 1909. Serial No. 487,901.

fctleet'ive iiea-ns "are employed for heating the water-as it traverses thecoils ofthe heater- 1 A further ob ect is'tlie production ofra heater?" whiehtjanew and improved ar- I rangeinntot'heating coils isemployed, and

in whichinean'sfare utilized for receiving the water of condensation and discharge it v fronrthe heater. I A further ob ect is the production ot nu-' protect automatic means for controlling the delivery of gas to the heater'and -the flow of waterthroughitliecoils of thexheater'. 25,

[Thesa ndfother "objects I attain inan apparatus enibod ving the features .herein de:

' T sc -1 nd ilh st-rated inl the drawings aco n ianying. tlnsapplication, and forming a In the drawings, Figure 1 is a sectional 7 view along" the line a a of Fig. 3, and illustratesa heater embodying my invention.

Fig.2 is "a transverse section of an automatic .gas and water controlling device, which ftn-msa part of my invention. Fig. 3 is a plan view from beneath. of the apparatus illustrated in Fig. 1. Fig. 4 is a sectional view along the line b7) of Fig. 1. Fig. 5 is a perspectiveview of the heater embodying my invention, the automatic controlling device being removed for convenience of illust-ration.

The apparatus embodying my invention. includes two coils; an inner coil and an .outer coil of copper pipe, which are mounted within about insulatingcasing, and which I are connected to a waterdistributing system. The water-is admitted tolthecoilsthrough a controller, which actuates aLgasyaIVe in a gasdelivery f pipe, and which controls the flow of water through the coils. The gas valve controls the delivery of gasto a gas-- burner, which :is located within the casing, inclosing-the coils, and is adjacent toa-nd below the coils;

Referring to the parts by means of the reference numerals: An outer coil, 6, and an inner coil, of copper pipe are located within a casing, which consistsof a top, 8, a base, 9. and a shell portion, 10. The shell, 10 is rigidly secured to the base. 9, and supports the top, 8, from which the coils, (3 and 7, are supported, by means of hangers, 11. The hangers, 11, are located between the inner and outer coils and are provided on each side with recesses, which are adapted to receive and hold in place the separate turns.

.of each coil. If deemed necessary, each turn, or several of the turns of each coil may be positively secured to the hangers by any suitable means, such, for instance, as wire loops. ,The lower end of the outer coil, 6, is

connected to a water admission-pipe, 12, by

means of a coupling, 13, which performs the additional function of securing the lower end of the coil to the shell portion, 10. The

coils areso arranged that the water entering through the pipe, 12, flows upwardly, m

circulating through the outer coil, and then downwardly, in' circulating through .the inner coil, and is delivered from the inner cull through a pipe, 15, which is connected to the lower end of the inner coil by means of a coupling, 16. The pipe 15 communicates with the water distribution system, and the coupling 16 secures the lower end of the coil, 7, to the shell, 10. The base, 9, of the casing is especially constructed for mounting a gas burner 17, which is located within the casing, below the coils. The

burner 17 is mounted on the base, by being fitted over a lug, or ridge, 18. formed on the upper face of the base and is secured in place by means of a pilot-light jet 19, and its connecting pipe, 20. The pipe 20, extends upwardly through an aperture in the top of the burner 17 and the jet 19, when in place on the pipe, 20, contacts with the top of the burner and rigidly secures the burner in place. The burner is soconst-ructed that the gas apertures, 21, are arranged-in several sets,- r 1e above the other. This is accomplished by constructing the burner with successive off-sets, one above the'other, and by providing-apertures 21 in the vertical faces of each ci -set. communicate with a gas and air mixing chamber 22, which is formed integrally with the base 9, and Which-communicates with the interior of the burner proper, through an opening 23 provided in the base.

One of the dilliculties in instantaneous These apertures 21 heaters isdue to the water of condensation which forms on the heater coils and by dripping ofi of the coils on to the burner, causes the burner to rust out, and to otherwise deteriorate. The water vapor which results from the thorough combustion of the gas supplied to the burner, is condensed upon coming into contact with the cold copper coils, and under some conditions, collects in such quantities that it must be taken into consideration heater; The burners are usually placed directly beneath the coils, and, consequently the water of condensation drips on, or into them, and causes the difli'culties above re-- ferred to.- I avoid all these diliic'ulti'es by placing the burner 17 directly beneath the intermediate s ,ace which is surrounded by the inner coil and by providing a cop er, or other rust proof drip pan, 24, locate on the base portion, beneath the coils and around the burner 17. The pan drains through the outlet. 25, which is provided in the base 9. The top 8 is provided with a vent 26 for the gases, resulting from the combustion within the casing. This ventmay be connected by means 0 suitable pipto a flue forthe purpose of carryin o the fumes. A deflector hood is locat between the burner 17 and the vent 26, and is so arranged that it increases the travel of the heated ases within the casing, and brings them into more intimate contact with the water tubes of the heater. This hood consists of a flat disk 27 made of sheet metal and supported by the upper turn of the inner coil and located adjacent to the vent'26. A downwardly extending -skirt 29 is secured to the disk 27 and is located in close proximity with'the coil 7. This skirt, however, extends only part way down the coil. The heated gases arising from the burner .are carried upwardly by convection. The

hood deflects these convection currents so that they travel downwardly along the a ron 29 and then upwardly through both coil; on all sides of the apron 29. The lowerportion of the inner coil is closer to the burner, and, consequently, receives the direct sensible heat of vthe burner, and since the hot water is delivered from the lower end of the 'inner coil, the hottest water is subjected to the hottest gases fr .-m the burner.

'The shell 10 is formed in three pieces, an inner and an outer shell and an intermediate heat insulating portion. A portion 30 of the shell lO'is hinged to the other portion of the shell, and forms a door which extends the entire height of the coils and provides a means of admission to the coils, and the burner. This door is provided with what I term a non-positive catch 31, by which it is secured i i the closed position. The catch "31 consists of a short piece of sprin steel,

which is secured to the edge of the cor 30 in building -a successful and is eprovided with a slight depression 32, adapt to engage a ridge 33,'of corresponding height, provided on the stationary portion of the shell. While this latch holds the door closed, it does not positively lock it in this position," and it therefore ellminates the danger which might arise from an explosion within thec'asing.

The automatic controlling device consists of a cylinder34, which communicates directly with the" pipe, 12, and with a water supply ipe '35. A plunger 36 is located wit in t e cylinder 34 and is so arranged that it will move to actuate agas valve 37 when a faucet is opened on thedelivery side 30 of the instantaneous heater. The plunger 36 islocated in the cylinder between the pipe 35 and the ipe 12, and passage; 37 are provided in t 0 cylinder wall, around theplungen for uttuig these pipes into. 35. communication. 5 ring '38 is located within the linder be ow the plunge-rand operates to. orce theplun er ppwhrdly so as to close the upper end o 'thepaasage 37. A small bv-pass 39'extendsth1'ough the wallv of the cylinder and connects. the passages-- 37 with the portion of the cylinder 'above the plunger '36 when the plungeris in a position to close the upper end oi the pea sage. With this arrangement, the plunger is exposedon each side to the water pressure, and when these op osingwater pressures are equal, it is he d by the ressure of the spring 38 in its upper posit on, that is, in t e positionin which closes the 10o upper end of the passe e 37. When a faucet is opened in the distri ution system on the sgpply side of the heater, the pressure is r water pressure above the plunger then preponderates, and, by overcomin the pressure of the spring 38 forces the p unger downwardly and uncovers the upper end of the passage 37, and thereby causes a flow of water through the pa age, and cohsequently through the coils 0 .the heater.

The fall in pressu'le below the plun er in the cylinder 34, varies directly wit the amount the Etucet is open, and consequently, when the t'auott is wideopen, the plum er will-be forced to its lowest position, so't at thepassage 37 will be wide open andn maximum amount of water will flow through the coils. The plunger 36, in respondln to the variations n pressure below it, in the cylinder 34,, as has been described, actuatesthe s valve '37. This yvalve consists ""of a,va ve disk 40'which' is inclosed within a globe valve casiug,.and which is connected to a valve stemtll. The disk 40 seats on a diaphragm 42, which extends acrossthe casing between the admis sion and delivery ports of the valve. A

spring 43 st crounds the outer portion of 13.0

need in the system and,.consequently, in the cylinder 34, below the plunger.- The ,,sit ion. and-the pilot-nut 44 is employed to Lvar thetension of the spring l3. and. consequeutly. to vary the operation of the valvel -I YTlieyalve asiug is secured to the cylinder 3.4bymeans of a bracket 46. which i suitably secured in place. gas delivery pipe 47 conm'iimicat'es with the inlet port otthe. valve 37'. and a gas delivery nozzle 4% communicates with the outlet port of the valve. turn cock 49 is located between the nozxie 43 and the valve casing. Th: casing of the turn-cock proje ts through an aperture formed In a bracket 50, which is formed mtegralwith the base portion 9 of the heater.

.' The nozzle 48 islocated'within the mixing 25. a 37 to the base 9.

The piping 20 of thelpilot-light is conchamber 22, and when secured in place on the casing of the turn-cock 49. secures- .1 he turn coek, and consequently. the gas valve n ected to one side of the casing 'of the o valve 37', so that it by-passes thegas around so.

the disk40 and continually supplies it to --the pilotlight.

p i passage 37.

theiberating coils -can be adjusted in('l'. =pend-- An adiustmg valve 53 is providedv in the so that the flow of water from ently of the plunger 36. Any su'itable valve y be employed for this purposehwhich maybe easilyadjusted and which will stay 'inflthe. adjusted position. A drain valve 54 Y fisfalso seemed to the. cylinder ill and com- 40 municates with rill? passage 37. The function of-this valve s. to drain the rails. and itaccomplishes tl. by admitting an mto thepassage 37. when the water has been shut: off from the pipeflfi and the faucets have been opened on the distribution side of the heater.

.A'plunger, or piston rod '55 is connected to the plunger 36. and -.extending through suitable packing glands in the bottom of the ,cylind'er 34. it. is adapted to engage and to actuate the valve stem 41 of the gas valve. When a faucet is opened on the distribution side 0f the. heater. the plunger 36. descends.

ashas been described, and opens the passage 37. At the same time, the piston rod 55.

" contacts with andimoves the valve stem 41 to open the valve 37and to cause a ll()\\ of gas to the burner 17. The gas thus admitted fltt'rthejburner 17 is ignited by the pilot-' light and the watcr flowing through the, coils of the heater instantaneously heated 1 bythecomlmstion. 'llu" plunger ilti. in moving dmvriwardly to operate the valve 37. must Overcome'the tension of the spring l 2 land, consequently. the operation of the automatic device maybe adjusted by adjusting the tension of the spring. 4

The water delivered by the heater may be maintained at a predetermined temperature, by varying the adjustment of the valve 53, which controls the flow of water through the cylinder Ei-t and by varying the adjustment of the spring 43 by means of the nut 44.

The plunger 36 occupies different posi-' tions. dependent upon the rate of water flow i through the coils t3 and T. and. consequently, the valve 37' is open more or less, and supplies variable amounts of gas to the burner, in accordance with the variations of watertlow. 'l'hismaihtains the temperature of the water delivered by the heater substantially qqual for'all flows.

'hen'it 's desired to render the heater the delivery side of the heater and below the heater. water is drained out of the coils than any of the faucets in the distribution system. the valve 34 will actas thedrain valve. when air is admitted through the distribution system by. the opening of one of the faucets. Y

'lheheater is adapted to be secured to a wall and is provided for that purpose with brackets. which are located-onlthefibase and on the top portions of the casin An air admission space .17 is maintained between the shell 10 and the base portion for admitting air to the interior of the casing. 'l'his air space supplies additional air'to the burner. and also is etlective in maintaining air currents through the casing and out of the futile-vent.

In accordance with the patent statutes, 1 have illustrated and described what I now consider to be apreferred embodiment of my invention, but I desire to be understood shown, and that various changes and moditiea'tions. may bemade without departing from the spirit and scope of my invention.

What I claim is:-

l. in combination with a water heater -omprisiug a coil. :1 gas burner for heating l coil. :1 gas delivery valve for controlling the delivery of gas to said burner. a source of water supply for said coil. :1 water valve between said source aud said coil and consisting of a cylimlrical valve casing. a water 5 passage upon the side of the casing and comand. consequently. when a faucet is open on.

that I do not limit myself to 'the apparatus through the faucet. It tlie'eoils'are lowermin;

municating with the upper-end lower ends of the casing, a reciprocating plunger within the casing, a coiled 5; ring between the bottom of the plunger an the bottom of the casing and adapted to hold the plunger nor malty over the upper end of the water passage, and a small by-pass connecting the upper end of the passage and the casing at a point above the normal position of the plunger, whereby the pressure of the water is normally communicated to both sides of the plan er.

2. n combination with a water heater comprising a coil, a gas burner for heating said coil, 9. gas delivery valve for controlling the delivery of gas to said burner, a source of Water suppl for the coil, a valve between said source an said coil and consisting of :1

cylindrical valve ca-sing, a water pa ssege upon the side of the casing and communicating with the upper and lower ends of the casing, a reciprocatin plunger within thecasing, means for hol ing the plunger normally over the upper end of the water passage, a small b '-pass connecting the upper. end of the passage to the upper end of the casing at a point above the normal position,

of the plunger, and a manually operated valve located in the upper end of the water passage and adapted to regulate the size of the passage.

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