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Publication numberUS2255956 A
Publication typeGrant
Publication dateSep 16, 1941
Filing dateJun 26, 1939
Priority dateJun 26, 1939
Publication numberUS 2255956 A, US 2255956A, US-A-2255956, US2255956 A, US2255956A
InventorsWatt Oscar G
Original AssigneeWatt Oscar G
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dual service heating system
US 2255956 A
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Description  (OCR text may contain errors)

Sept. 16, 1941. o. G. WATT 2,255,956

DUAL SERVICE HEATING SYSTEM Filed June 26, 1939 2 Sheets-Sheet 1 .93 w I I TI -WAY VALVE INVENTOR 0.9a?! (i (0827 BY QM; 1 w

ATTO NEYS Sept. 16, 1941. Q w 2,255,956

DUAL SERVICE HEATING SYSTEM Filed June 26, 1939 2 Sheets-Sheet 2 MULTI-WAY VALVE m L; n A

INVENTOR RNEYS Patented Sept. 16, 1941 UNITED STATES PATENT OFFICE 2,255,956 DUAL sEavroE HEATING SYSTEM Oscar G. Watt, Tulsa, Okla.

Application June 2 6 1 939, SeriaI'NoJZBL ZSI s cli'iiis.

This invention relates to an improved method and apparatus for a heating system, and more particularly, but not by way of limitation, to a double or dual servicedomestic hot water supply and house heating system. The present application is a continuation-in-part of my application Serial No. 216,349, filed June 28, 1938.

In many sections of the country where gas and individual heaters are employed for home heating purposes, the rooms of the home are usually heated by small gas heaters having an open flame. Many disadvantages are incident to this type of heating, in that the gas flame is subject to the possibility of being blown out by normal circulation of room air, thus endangering the house and its occupants to the hazard of a fire or explosion, or asphyxiation from gas or carbon monoxide gas fumes. Furthermore, in many sections of the country where natural gas is not abundant, but due to warm climatic conditions, a. costly and bulksome heating plant is not necessary. And more specifically, in any climate, at certain times of the year such as early spring and late fall, it is desirous to heat certain rooms of the house such as a bathroom or dressing rooms yet the weather is not cold enough to warrant the operation of the individual house heating plant. Also at night after the house heating plant is shut down, a warm bathroom is often desired.

Furthermore, it has been found that in closed gravity heating systems heretofore known, utilizing the domestic hot water supply, such as those disclosed in the patents to Cowles et al., No. 835,812 and Thompson No. 1,240,101, the system can be utilized for supplying either the domestic hot water to the plumbing fixtures or the-heating units individually, but none of these systems provide-a single circulating system capable of a dual service for simultaneously supplying both the heating units and domestic hot water to a faucet. wherein both services can be utilized at exactly the same time without one service interfering with the other.

It is therefore an important object of this invention to provide a heating system for home or buiding heating utilizing the domestic hot water circulating system and equipment supplying the various plumbing fixtures throughout the house for simultaneously supplying hot water to radiators for heating purposes. A

And still another object of the invention is to provide a home heating system that is healthful in that it does not burn up the oxygen in the room air and is maintained at such a conbe either automatically or manually controlled.

'And still another object of this invention is to provide a home heating system of closed hot water gravity circulation type employing the same equipment for the heating radiators that is utilized for supplying hot water for the various plumbing fixtures of the home, a system that supplies heat to the various rooms of a home any time there is hot water for the plumbing fixtures, said system being independent of any auxiliary or additional home heating plant.

And still another object of this invention is to provide a closed system of home heating by high pressure hot water radiators that has eliminated most of the conventional equipment such hot water circulating type that is simple in design and construction in that it needs less attention for operation, economical and durable in that there is less equipment to purchase, keep in repair and depreciate.

And still another important object of this invention is to provide a single hot water circulating system that will perform a dual service of supplying circulating hot water to within a few inches of the faucet of a plumbing fixture of a dwelling, as well as supplying hot water to high pressure radiators as a medium for room heating purposes, said services capable of being rendered simultaneously without one service interfering with the other.

And still an additional object of this invention is to provide a single system of closed hot water circulation that will perform a dual service of supplying circulating hot water to within a few inches of the plumbing fixture of a dwelling, as well as supplying hot water to radiators as a medium for air heating purposes, said circulating system so constructed as to maintain constant circulation and to exhaust any air in the system or radiators through the regular use of a hot water faucet of a plumbing fixture, although the faucet may be located at a lower necessity of having may have been standing in the pipes between the tank and provide a system or hot maintain complete and raised to a-higher elevation than the faucet. Other objects and'advantages of theinvention willbe evident from the following detailed description readimconhmction with the acco'm panying drawings which illustrate one form of my invention. I

Inthedrawings: Fig. 1 is a view in broken elevation of the improved dual service system of hot water I'circulation for domestic hotwater supply and room to draw any cold water that v a hot water faucet 2c of a lavatory 22. a byfaucets, this circulation to continue, although some point in the circulating line has been,"

heating. with portions of the structure in which it J isinstalledinsection. '3. Fig. 2 is a detail view in front elevation showing the arrangemen of one of the heating units with a plumbingjfixture showing the two-way or transfer valve for con trollingthe' supply and 'retumof circulating hot water. v

- Fig.3isatopplanviewofflg.2;

Fig. 4 is a detail view of-a portion of lineinthecircuiatingsystem.

Referring now tothe sponding parts are designated by like numerals of reference, and more particularly to Fig. 1,

and more particularly the supply;

I tern is free of air.

pass line 24 extends from a side orifice of the valve it into communication with a downwardly extending return line 25 dischar i g to the tank 2 at a point adjacent to the bottom thereof.

From the foregoing, it will be apparent that with the valve 16 set in proper position, hot water will circulate by gravity from the top of tank 2 up through the supply pipe l2, to the two-way valve l8 and back through the by-pass line 24 and the return line 25 to the bottom of tank 2, as long as there is a difference in the temperature of the water in the pipes l2 and 25, and the sys-' In a closed system (closed to atmosphere) as the present invention, any air that may be present in the system will be eliminated by opening the lavatory faucet 20 wherein air will be forced from the tank up through the pipe l2 and exhausted out through faucet 20 to provide a system which will remain free of air by the regular use of the fixture faucets. In order to utilize. this single system of .closed domestic circulating hot water supply as a means for heating the various rooms of a house,- building or the like, and thus perform a dual service; it is only necessary that a heating meafi's' such as hot water high pressureradiators be added. It is to be understood that the transfer valve I6 is installed in the supplyline l2v at :a point at least ashigh as the top of a radiator 26.- In this arrangement (as clearly shown in Figs.2 and '3), an auiciia'ry. hot water supply line 28 extends from the valveli into communication with-the top of the radiator 26. A return line 3! extends from the bottom of the radiator 26 into communication with the return drawings wherein com-j 40.

reference character 2 indicates a hot water boiler I ortankusuallydisposedinthebasement4ofa home, however, rangement or location of the hot water tank 2 can be made according to the construction of the building or home with which it is to be utilized.

it will be apparent that any ar'- A city water line 8 communicates with the city water main (not shown) and the hot water tank 2 for s pplying cold water at city main pressure, which in most instances varies from 25 to l00 pounds per square inch. A valve 8 is interposed in the line 6 which in open position allows water to flow through line i where it is discharged into the tank 2 at a point adjacent to the bottom of the tank. The inflow of cold water continues until the pressure in tank 2 and of the pipes of the system to be hereinafter referred to, equals the city main pressure, thereby producing a high pressure system capable of a high velocity flow.

;Water discharged in tank 2 may be heated by various means, but the present invention discloses a conventional gas fired heater ll arranged adjacent to tank 2, and communicating therewith by pipes II and I". With the heater II heating the water in tank 2, the water is expanded and causes circulation throughout the system. A thermostat 9 is provided in tank 2 for controlling the temperature of the water in the tank. A hot water supply pipe l2 extends from the top of the tank 2 through floor M of the building into communication with a two-way or transfer valve Ii line 25 for the tank 2. The valve It may be any conventional type of twoway transfer valve, however, it is preferable to use a double-seating valve having four orifice openings for receiving pipe connections 12, It, 24 and 28. Any rotation of. the valve handle 32 (projecting from the wall) does not affect flow of fluid from supply pipe l2 to supply pipe I! and there will always be circulation to the lavatory faucet 2l| regardless of the position of the valve. However, it

will be apparent that the valve can be rotated to allow discharge of hot waterintothe pipe 28 for supplying hot water as a heating medium to the radiator 26, simultaneous with .the flow of hot water into the pipe I. With the valve Ii manipulated to supply a heating medium, circulation of the hot water is from the pipe l2 through the valve l6, pipe 2!, radiator 2i, pipe 2|, and back to the return line 25 and the tank '2, it being understood that with the valve in this position, return circulation through line 24 is closed. With the valve rotated to cut off the supply to line 28, return circulation from the faucet 20 is through lines 24 and 28, therefore assuring that with the valve set in one extreme positionor the other, return circulation to the tank can only be one way, i. e., either through lines 24 and 25, or through radiator 26 and line 30 to line 25, thus preventing the possibility of a short circuit in the circulation of the water.

communication with It will likewise be apparent that with any partial rotation of the valve, .fiuid can circulate simultaneously through the line 24 and the radiator 26. In this manner, the valve can be regulated to determine the supply of circulating hot water to the radiator, whether in whole or in part. This adjustable feature provides selective control of the heating medium supplied to the radiator, which can be varied according to climatic conditions. I

The foregoing description has only been concerned with the supply of a heating medium to the radiator 26 for one room of a dwelling, particularly to a bathroom having a lavatory. The present invention discloses the radiator disposed beneath the lavatory, but it will be apparent that the radiator can be disposed anywhere in the room as long as the proper communication is provided between the supply and return lines,

and the faucet. However, in order to supply hot water to a radiator or radiators arranged in a plurality of rooms in the dwelling, it is only necessary to provide auxiliary or branch extensions from the main supply line l2 and'return line 25.

It will be apparent that with a hot water circulating system obthis, type that; numerous radiators can be located adjacent and below plumbing fixtures-supplied with hot water, and many. arrangements can be made according to the arrangement of the dwelling. However, for purposes of illustration, the present invention discloses only one arrangement, wherein a T- connection 34 is provided in line 12 and comand pitches upward into communication with T- fitting 82, communicating with pipe 88 through a bushing 8i and jet nipple 81. Any air in the radiator S8 and pipe 88 will be discharged through pipes 80 and i8, and faucet I8, as will be hereinafter described.

Referring now to the sink i8 and laundry tub 88, it will be noted that they are located at a point which makes it necessary or desirable to place some part of the circulating pipes at a point higher than the faucets of these fixtures, thus creating a place in the system for the accumulation of air at the highest elevation of the pipes. Normally, an air pocket would not prevent water from being drawn from a faucet of the fixture, however, such an air pocket would prevent gravity circulation through the system when the faucets were close... The manner of installing the auxiliary circulating pipes so as to provide constant circulation, and likewise prevent any possible accumulation of air in such sumclent quantity to prevent circulation will now be explained.

municates with the auxiliary supply line 88 supplying hot water to a radiator 38. The radiator 38 is shown disposed in any conventional fixture Ill, such as a dressing table, cabinet, or the like,

however the radiator may be separately arranged in a room. A control valve 82 is interposed in the line 36 controlling the fiow of hot water to the radiator 38. An auxiliary return line 44 extends from the bottom of the radiator 38 into communication with a connection 48 in the main return line 25. It will be apparent that any air in the supply line 38 can be exhausted through the hot water faucet 20.

A second auxiliary supply line 48 extends from T-connection 50 and is provided with auxiliary or branch lines 52 and 54 extending therefrom. It will be obvious that the supply line 48 can have as many extensions as are practical, depending upon the number of radiators disposed in the various rooms of the building. In the present disclosure, line 48 is plugged at 51 but may be extended if desired. A line 55 extends from a T-connection 86 in line 54 into communication with a control valve 58 controlling discharge of hot water to radiator 68. With the valve 58 in open position, hot water is discharged into the radiator 60 for supplying a heating medium thereto. A return line 62 provides communication from the bottom of the radiator 80 to an auxiliary return line 84 communicating with the main return line 25. Line 64 can have as many extensions as desired. Hot water flowing in line 52 passes into pipes 66, 88 and 18 and into communication with a T-iltting 12, where an auxiliary line II provides communication with a hot water faucet ii of a plumbing fixture 18. Line 18 extends downwardly from the T-fitting 12 into communication with a hot water faucet 86 of a laundry tub or fixture 88. A line 90 provides a connection between faucet 86 and a T-fitting 99 communicating with the tank 2 to complete the circuit. It will be apparent that the line 88 acts as a return line.

Alluding further to the radiator 88, it will be noted that it is disposed in a remote position from the plumbing fixture, and in order to relieve air from the radiator 88 and its supply pipe 54, a. line 88 (preferably a 'small metallic tube) extends from the high point of a T-fltting I6,

The faucet 18 is in communication with the top and bottom of tank 2 through pipes I 2, 48, i2, 86, 68, I0, 98 and 25, thus providing a complete circulation of hot water to and from the tank. A check valve II is provided to prevent a backward flow when faucet I8 is opened. It will be noted that most of. the supply lines feeding the quick opening faucet I6 are of higher disposition than the faucet. In order to safeguard against a possible air lock in the auxiliary supply lines 52 and 18, two horizontally connecting lines 86 and 68 are arranged in floor 98 providing communication between lines 52 and 10. By properly sizing the pipes 66 and 68 in relation to the delivery capacity of pipe Ill and faucet I6, a sufficiently high velocity of water can be had through these pipes to force out all air in the pipes upon opening the faucet. In a closed system, high pressure water pipes do not accumulate much air once they are freedof air. The use of two smaller connecting pipes 68 and 88 instead of one horizontal pipe of the same capacity as pipe Ill, divides the horizontal flow of hot water the higher conduit 68 will serve as a containerof air for any period of time when the faucet I8 is not being used, while the lower pipe 68 continues to act as a circulating pipe for hot water by constantly maintaining a water filled circuit. It has been found in practice that a very small circulating pipe will pass enough water (even at a low velocity) to keep all supply lines sufilciently hot, although the total carrying capacity of the supply lines is much greater than the capacity of one small circulating pipe.

Refen'ing to Fig. 4, it is to be noted that the arrangement of pipes 66 and 68 is such that there will be a greater fluid flow, and at a higher velocity, through pipe 8 than through pipe 68 when faucet I6 is opeii. This is accomplished by connecting pipe 88 directly into the top of auxiliary supply pipes 52 and 18, thereby requiring only two right angle turns between the upward flow in 52, and the downward flow in II. The pipe 68 is interposed between the pipes 52 and 10 by the T-fittings 92, 92, elbows 86 and 98, thus creating more friction due to the increased number of turns. In the present instance, four turns are necessary for pipe 88, as compared with two for pipe 86. Water flowing through supply line 52 at a high velocity will have a tendency to flow in a straight line through T-fltting 82 and on to fitting as, du'e to the increased frictional resistance of the T-fitting 92 and elbow 80.

Alluding further to the pipe 80 for exhausting air from radiator 60 and supply line H, the pipe 80 contains in addition to the air to be exhausted, water at city main pressure, and will therefore discharge a small amount of water through the jet nipple 61 and bushing 8| intothe pipe 68 each time the faucet I6 is opened. The Jet 61 increases the velocity of water flowing from pipes 52 and 80 into pipe 6, in order to assist in exhausting any air accumulation at the high point of the system. It will ,be apparent that any number of radiators can have air exhausted by means of an exhaust line similar to pipe 80 connected to a jet nipple as shown in Fig. 4. It will thus be obvious that with the pipe 66 serving as a container for air, the

quickly exhausts any air in pipe '86" upon opening the faucet 16,. However,

pipe 68 has suflicient capacity to provide ample circulation of hot water to faucet l6, and the foregoing arrangement assures a constant circulation to faucet It, as well as means for relieving any air in the system. It will be obvious that faucet as can likewise be utilized to free the system of air. i y

The expansion of water in tank 2 when heated is provided for by the regular use of the hot water throughout the system. Howeve if 1 no 2. An improved dual service system of hot water circulation comprising a boiler, a plumbing fixture. a supply line connecting the boiler with the plumbing fixture, a control valve interposed in the supply line, a return line between the valve and the boiler providing circulation of the water, a t radiator, a first pipe connecting the radiator to the valve, a second pipe connecting the radiator to said return line, auxiliary radiators, piping connecting the supply line and the return line respectively with the auxiliary radiators, and means operatively connected with high velocity throughjl created by the jet 61, as well as the fiF-fitting i9,

it is understood that water is drawn from the faucets during the time the water. in the tank is being heated, the ex-; pansion is-received by the city water main as long as the valve 8 is open. In case the valve 8 should be closed during the time water is being heated, I

and no water is drawn from faucets, the line is provided with a safety valve I02 for relieving any excess pressure due to expansion. The pipe lli is provided with a drain valve I08. I

From. the foregoing, it will'be apparent that the invention provides a single system of hot {water circulation capable of performing the dual said piping and return line for discharging air therefrom, said means including a pair of pipes so constructed and arranged as to assure constant circulation of the water throughout the system.

improved dual service system of hot water circulation comprising a boiler, a plumbing fixture, a supply line connecting the boiler with the plumbing fixture, a control valve interposed in the s pply line, a return line between the valveand theboiler providing circulation of the water, a first radiator, a first pipe connecting the radiator to the valve, a second pipe connectin the radiator to said return line. auxiliary radiators, piping connecting the supply line. and the return line respectively with the auxiliary radiators, means operatively connected with said piping and return .line for discharging air therefrom, said means including a pair of parallel pipes so constructed and arranged as to assure constant circulation of the water throughout the syste 4. An improved dual service system of hot water circulation comprising a boiler, a faucet, a supplyfline connecting the boiler with the faucet, a multi-way valve interposed in said line,

a return line connecting the valve with the boiler to provide circulation of the water, a' radiator,

I apipe for leading water from the valve to the Changes may be made in the combination and 4 arrangement of parts as heretofore set forth in the specifications and shown in the drawings, it being understood that any modification in the precise embodiment of the invention may be made within the scope of the following claims without departingfrom the tion.

What I claim is:

1. In a closed gravity circulating system of hot water comprising a tank, hot water supply lines communicating with the tank and a plurality of plumbing fixtures, return lines from the plumbing fixtures to the tank, means comprising a pair of pipes interposed in. the supply lines at a point higher than any plumbing fixture for dividing the fiow of hot water into two channels, said spirit of the invenpipes so constructed and arranged to assure con-' stant circulation of water throughout the system.

radiator, and another pipe for leading water from I the radiator to the return line.

5. An improved dual service system of hot water circulation comprising a boiler, a faucet, a supply line connecting the boiler with the faucet, a multl-way valve interposed in said line,,a return line connecting the valve with the boiler to provide circulation of the water, a radiator, a pipe for leading water from the valve to the radiator, another pipe for leading water from the radiator tothe return line, an auxiliary radiator,

-',a pipe connecting the supply line with the auxiliary radiator, and another pipe connecting the radiator with the return line.

6. An improved dual service system of hot water circulation comprising a boiler, a faucet, a supply line connecting the boiler with the faucet, a multi-way valve interposed in said line, a return line connecting the valve with the boiler to provide circulation of the water, a radiator, a

pipe for leading water from the valve to the radiator, another pipe for leading water from the radiator to the return line, auxiliary piping connected to the supply and return lines andforming an auxiliary circuit for the circulation of water, said piping including a pair of parallel pipes to allow water from the supply line to flow simultaneously in plural paths to the return line.

7. An improved dual service system for hot water circulation comprising a boiler, a faucet, a

supply line connecting the boiler with the faucet,

a multi-way valve interposed in said line, a return line connecting the valve with the boiler to provide circulation of the water. a radiator. a

pipe for leading water from the valve to the radiator, another pipe for leading water from the radiator to the return line, auxiliary piping connected to the supply and return lines and forming an auxiliary circuit for the circulation of water, said piping including a pair of parallel 5 pipes to allow water from the supply line to flow simultaneously in plural paths to the return line, and a radiator interposed in the auxiliary piping.

8. An improved dual service system for hot water circulation comprising a boiler, a faucet, a supply line connecting the boiler with the faucet, a multi-way valve interposed in said line, a return line connecting the valve with the boiler to provide circulation oi the water, a radiator, a pipe for leading water from the valve to the radiator, another pipe for leading water from the radiator to the return line, auxiliary piping connected to the supply and return lines and forming an auxiliary circuit for the circulation of water, said piping including a pair of parallel pipes to allow water from the supply line to flow simultaneously in plural paths to the return line,

10 and a faucet interposed in the auxiliary piping.

OSCAR G. WATT.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5485879 *Apr 8, 1994Jan 23, 1996Bradford White CorporationCombined water heater and heat exchanger
US5660165 *Jun 7, 1994Aug 26, 1997Bradford White CorporationBack-up heater
US6142216 *Oct 15, 1997Nov 7, 2000Bradford White CorporationIndirect water heater
US7007748Sep 30, 2003Mar 7, 2006Bradford White CorporationIndirect water heater and method of manufacturing same
US7063132Dec 29, 2003Jun 20, 2006Bradford White CorporationMulti-wall heat exchanger for a water heater
US7063133Dec 28, 2004Jun 20, 2006Bradford White CorporationMulti-wall heat exchanger for a water heater
WO1991003688A1 *Aug 30, 1990Mar 21, 1991Myson Group PlcA pump module
Classifications
U.S. Classification237/19, 4/638
International ClassificationF24D3/00, F24D3/08
Cooperative ClassificationF24D3/08
European ClassificationF24D3/08