US821991A - Hot-water heating system. - Google Patents

Description

No.. 821,991. PATENTEDMAY 29, 1906. J. G. DEMAREST. HUT WATER HEATING SYSTEM.

APPLICATION FILED JULY7, 1904.

' y 5MM/@ UNITED STATES PENT OFFICE. y

JAMEs G. DEMAREST, on WEST. HoBoKEN, NEW JERSEY, AssiGNoE To CLARA A. BAKER, ojE NEW YoRK, N. Y.

HOT-WATER HEATING f SYSTEM.

lcatented May 29, 1906.

Application led July '7, 1994. Serial No. 215.600.

To a/ZZ whom t may concern,.-l Be it known that I, JAMEs G. DEMAREsT, a citizen of the United States, residing in West Hoboken, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Hot-Water Heating Systems, of which the following is a full, clear, and exact specification. f

My invention relates to hot-water heating systems, and particularly to that character of apparatus such as is usually employed for heating railroad-cars and the like, wherein a heating-coil is provided in operative contact with a coal fire or other source of heat and radiating-pipes eXtend from said coil throughout the car for carrying the heated fluid to places remote from the heater proper. In such systems it has been usual to employ a steam-jacket around a portion of the pipes, obtaining steam from the locomotive, and thus the heating fluid may be caused to circulate in the ipes without the necessity of a coal lire in t e stove or heater proper. In these systems,. however, it has required a considerable time to produce a com lete circulation of the Huid after building e in the heater or turning on the steam, owing to the increasing amount of piping required to fit out the more modern and very long cars, and it is this slowness in getting them under Way that my invention is designed to obviate.

In the accompanying drawings, illustrating one form of my invention, I have shown a diagrammatic arrangement of pipes, it being understood that the dispositlon thereof is shown conventionally only. v

In the drawings, l represents the heatercoil, which may be of any well-known type.

vTo the lower end of this coil is connected by a suitable joint the return-,pipes 2 3 of the circuits A and B. To the upper ends of the coil by a similar divided connecltionare attached the riser-pipes 4 5, carrying steam-jackets or steam-heaters 6 and 7 of any well-known type, the sectional view of the jacket 6 showing the preferable form which is fully shown in United States Letters Patent No. 498,924, granted to William C. Baker June 6, 1893, and which therefore need not be herein more particularly described. From the upper end of each steam-jacket is provided the pipes 8 and 9, leading into the expansion-drums 10j and 11, and from said expansion- drums pipes 12 and 13 lead to the radiating-pipes of each separate circuit around the car and back to the bottom of the. heating-coil. It will thus be seen that in my system I have two complete circulating systems, while utilizing but one heating-coil in the coal-burning heater, and by dividing the circuits in this manner the heated fluid has but half of the distance to travel, and I have found that a given-sized coil will produce a complete circulation in each branch in less than one-third of the time it takes to force the fluid through the same length of pipe were it in one continuous-circuit.

When it is desired to operate the system by the steam-heaters alone, it is unnecessary to require the two circuits to pass through the coil, and I have, therefore, provided a shunt-pipe 14, which ,connects the return of the system B to the lower end of the steamheater 7, and by closing valves 15 and 16 and opening valve 17 the systems A and B are made substantially independent and y distinct, as shown in the drawings.v It is possible, however, and insome instances it may be desirable, to so arrange the pipingthat systems A and B will not be entirely independent, but be connected in series lwhen valves 15 and16 are closed-that is,'the watercirculated from the systemA will return tothe bottom of system B, where it is subjected to the action of the heater 7 and is forced through the system B back to the bottom of y system A. The main steam service-pipe 18 supplies steam to steamheaters 6 and 7 through branches 19 and 20, having valves 21 and 22.

I have found that when operating the circulation in systems of this character it is advantageous to relieve any pressure which may be created at the ince tion of the operation; but care must be talen that no water is allowed to escape. To obtain this result, I provide the air-vents or relief- pipes 23 and 24, connected to the safety-vents 25and 26, so as to be above the possible water-line in the drum, and by keepmg the valves 27 and 28 open until the circulation has been completed and then closing them I have an ideal result.

It is obvious that many modifications and IOO What I claim, and desire, to secure by Letters Patent, is-

1. In a hotwater heating system, a,plural ity of independent water-circulating circuits, each of said circuits including expansion means, a heating-coil included in one of said circuits, with means forbringingaid coil into communication with the other circuit, and an independent steam-heating attach'- ment in operative connection with each of said circuits, whereby each of said circuits may be operated independently or they may all be heated by the said heating-coil, substantially as described.

2. In a hot-water heating system, two independent circulating-circuits, each of said circuits including an independent expansion vessel, a heating-coil included in one of said independent circuits with means for bringing said coil into communication with the other circuit, and a separate steam-heater for operating each of said circuits, whereby each circuit may be operated independently or they may both be operated by saidheating-coil, substantially as described.

3. In a hot-water heating system two in'- dependent circulating-circuits, each of said circuits including an independent expansion vessel, a heating-coil included in` one of said independent circuits with means for bringing said coil into communication with the other circuit, and a separate steam-heater above the coil for operating each of said circuits whereby'each circuit may be operated inde# pendently or they may both be operated by said heating-coil, substantially asl described.

4. In a hot-water heating system, two independent circulating-circuits, each of -said `circuits including an independent expansion vessel, a single heatingcoil included in one of said independent circuits with means for f bringing said coil into communication with the other circuits, and a shunt-pipe insuch. other circuit around the coil, an independent r steam-heater for operating each of said circuits, whereby each of said circuits may be operated independently or they may both be operated by said coil, substantially as described.

5. In a hot-water heating system, two independent circulating-circuits, each of said Icircuits including an expansion vessel, a single heating-coil included in one of saidindependent circuits with means for bringing said coil into communication with the other circuit, and a shunt-pipe in such other circuit around the coil, an independent steam-heater located above the coil for operating each of said-circuits, whereby each of-said circuits'inay be operated independently or they may both be operated by the said coil, substantially as described.

6. In a hot-water heating system, a plurality of water-,circulating circuits, each of said circuits including expansion means, a single coil included in one of said circulating-circuits, and means for bringing said coil into communication with the other circuit, an independent steam-heating attachment upon each of said circuits, whereby each ofthe said circuits may be operated independently or they may both be operated byf the said coil, and an yair-vent connecting thehighest kpoints in the system, substantiallyas described.

7. In a hot-waterheating system,ftwo independent circulating-circuits, each of said circuits including an expansion vessel, a single coil included in one `of saidfindependent circuits, -and 'means for bringing said coil into communication with-the other circuit, an inde endent steam-heater for operating each of said circuits whereby the said circuits may be operated independently of'the said-coil, or they-*may both be operated by the said coil, and an air-vent connecting with the highest points in the system, substantially as described.

8. .In a hotwater heating system, two independent Vcirculating-circuits,-each of said circuits -including an expansion vessel, a single coil included in one of said independent circuits, and means for bringing said coil into communication'withlthe other circuit, an independent steam-heater for operating each 'of said circuits located abovethe coil, whereby i the said circuits may be operated-.independently of thesaidcoil, orlthey may both be op-y erated by the said coil, and an air-vent-connecting with the highest points in the system, substantially as described.

9. lIn a hot-waterheating system, two independent circulating-circuits, each of said circuits including an eXp ansion vessel, a single coil included in one of said independent circuits, and means for bringing saidicoil into communicationwiththe other circuit, a shunt-pipe insuch other circuit around the coil, and an independent steam-heater for operating each of saidcircuits, whereby the-said circuits may be operated independently of the said coil, or they may both be operated by the said coil, and lan air-vent connecting with the highest points in the system, substantially as described.

10. In a hot-water heating system, two independent circulating-circuits, each-of said circuits including an expansion vessel, a single coil included in one of said independent circuits, and means for bringing said coil into communication with Athe other circuit, a

shunt-pipe included in --such other .circuit IOO around the coil, an independent steam-heater In testimony whereof I have hereunto set located above the coil for operating each of my hand in the presence of tWo subscribing IOl said circuits whereby tlhe said circuits may be Witnesses.

operated independent y o the said coil or they may both be operated by the said doil, JAMES G DEMAREST and an air-Vent connecting with the highest Witnesses:

points in the system, substantially as de- ADOLPH F. DINsY,

scribed. CEAS. D. KING.

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