US1674800A - Temperature-control device for heating systems - Google Patents

Description

`une 26, 1928.

J. Ross TEMPERATURE COTROL DEVICE FOR HEATING SYSTEMS Filed June 14, 1926 lll Patented .lune Z6, 1928..y

STAY

JAMES ROSS, OF EAST CLEVELAND, OHIO.

TEMPERATURE-CONTROL. DEVICE FOR HEATING SYSTEMS.

Application led .Tune 14,

This invention relates to a controlling device for heatinosystems and more particularly to a device for auton'iatically regulating the supply of fuel to thchcating unit and which is governed by the conditions existing at a given point in the system.

The main object of the inventionv is to provide a device of the character described which is adapted to bc connected in the return line of the heating unit to control the supply of fuel to the heating unit.

Another object of the invention is to provide a device of the character described which is simple and rigid in construction and which is well adapted for quantity production at comparatively low cost.

Another object of the invent-ion is to provide a control device for heating systems in which the expansion of a confined body of liquid is utilized to actuate a means for diminishing the supply of fuel to the heating unit in accordance with the temperature at a given point in the system.

. Further and` more limited objects of my invention will appear as the description proceeds and by reference to the accompanying drawing in which Fig. 1 is a diagrammatic view showing my control device connected in a heating system; Fig. 2 is an enlarged vertical sectional view of the prcferred embodiment of my control device, and Fig. 3 is a view similar to Fig. 2 taken at right angles thereto.

In Fig. 1 the numeral 1 designates a heating unit comprising a boiler 1, a combustion chamber 2 and a cold water supply pipe 3. To the upper end of the boiler 1 is connected a pipe 4 which leads to a radiator and connected with the opposite side ofthe radiator is a return pipe 6 in which is connected my control. device designated generally at 7. The fuel supply pipe 8 leads through the top of the control device 7. as shown, and the supply ofv fuel to the heating unit is controlled in a manner toA be hereinafter described.

YThe control device comprises a casing 9 and formed within the casing is chamber.

10 having a conduit 11 leading through the casing which serves as a vent and is normally closed by a plug 12. The lower end of the end of the chamber 10 is closed by a threaded cap 13 to which is connected a spring pressed plunger 14, the purpose of which will hereinafter appear. A bore 15 connects with the chamber l0 and lilfls 1926. Serial No. 115,814.

through the top of the casing and is closed by a screw cap 16. Slidably mounted in the bore 15 is a valve member 17 having a stern 18 leading through an opening in the top of the cap 16. The stem 18 is provided with a cap 19 which serves to limit the downward movement of the valve. The valve 17 is provided with a pair of ports 20 and 21 the purpose of which will hereinafter appear. Extending through the upper part of the casing, preferably at right angles to the bore 15, is a bore 22 to each end of which is connected the fuel supply pipe 8. Extending through t-he lower part of the casing, and preferably at right angles to the bore 22 is a bore 23 to each end of which is connected the return pipe G. From an inspection of the drawing it will be seen that the chamber. 10 is formed within the bore 23 and that the water returning from the radiator through the pipe 6 passes around the chamber 10 and contacts with the Walls thereof.

O per@ tion.

Gas or other fuel is supplied through the pipe 6 and is ignited in the combustion chamber 2 to heat the water in thevboiler 1. The hot water passes up through pipe l to radiator 5 and returns to the boiler through pipe 6 and control device 7 to the boiler. The valve member 17 is normally in the position shown in Fig. 2 with the port 2O in position to allow the fuel to be sup plied through pipe 8 to thel combustion chamber. lVhen the liquid in the return line and bore 23 reaches a predetermined temperature the water of other fiuid in chamber 10 will be 'correspondingly heated and Will; expand due to the rise in temperature and will actuate the valve 17 to diminish or cut off supply of fuel to the combustion chamber. Should the water in the return linebe hot enough to completely close the port 20, port 21 will be opened to allow suflicient gas to pass through to ignite the pilot light. The casing is provided with an opening 24 closed by a removable plug 25 and into which a separate conduit may be connected for the pilot light, should the same be necessary.

While I have described my control device as used with a hot Water heating systemy my device is equally well adapted for use with asteam, vapor or hot air system and I Wish my invention to be limited only in,

claims. I also Wish it to be understood that my invention is not to be limited to a control device in Which Water or any other' liquid is used in the expansion chamber as the device Will operate efficiently Without a liquid in the expansion chamber. It is merely necessary to provide a sealed chamber having a piston slidably mounted therein Which will vary the rate, of flow of the fuel in accordance with the temperature of the fluid adjacent the Walls of the expansion chamber.

It Will nou/f be clear that I have provided a device which Will accomplish the objects of the invention as hereinbefore stated'.

Having thus vdescribed my invention, WhatI claim is:-l i

(1,., A cont-rol device for heating Vsystems comprising aV casing, a. fuel supply conduit leading .through said casing, acliquid return conduit leading through .said casing, partitions in said liquid return conduit defining a chamber, a bore connecting said chamber with said fuel supply conduit, a

' valve slidably mounted in said bore for regulating. the supply o-f fuel to said heating unit. in accordance With the temperature at a. given point in the. syst-em.

In a. control device for heating systems, a casing, a. valve in said casing for regulating the supply of fuel to the heating unit, a liquid conduit leading through said casing, a chamberformed in said conduit adapted to be filled with liquid7 said valve projecting int-o said chamber and adapted vto be moved the expansion of the liquid in said chamber tol decrease the sup,- ply of fuel to said heating unit.

3. A thermostatic control device. fory heating systems comprising a casing, a fuel supply conduit extending through said casing, aI liquid return conduit extending through said casing below said fuel conduit, partitions vformed in said liquid return' conduit defining a chamber, a. bore connecting said chamber With said fuel supply lconduit,l a valve slidably mounted in said bore for controlling the supply of fuelto said heating unit.

4. A control device for heating systems adapted to be connected in the return line tothe heating unit, comprising a casing, a bore vextending through said `casing the opposite. endsI of which are adapted to be connected with al fuel supplyconduit, a, second bore `extending through saidI casing at an angle to saidfi'rst bore the opposite ends of which are adapted to ybei.connected Withr a Water return line, partitions formed in said last mentioned bore defining a chamber, al third bore connecting said first mentioned bore with said'chamber, al valve slidably mounted in said third bore for controlling the supply of fuel to said heating unit.

5. A device as set forth in claim l in Which said chamber is provided With a spring pressed plunger to take care of excess pressure in said chamber.

6. A thermostatic control device for heating systems comp-rising a. valve casing, a fuel. supply conduit extending through said casing, a fluid return` conduit extending through said casing at an angle to said fuel supply conduit, partitions formed in said fluid return conduit defining ay chambeiga bore connecting said chamber with said fuel supply conduit, a valve slidably ymounted in said bore for controlling the supply of fuel through said fuel supply conduit.

7. A control device of the class described comprising a. casing, a bore extending through said casing the opposite ends of which are adapted to` be connected with a fuel supply conduit, a second` bore extending through said casing at an angle to, said first bore the opposite ends of Which are adapted to be connected with. a fiuid return line, partitions formed in said secondA bore and defining a chamber, a thirdbore leading from. said chamber to the outsideof said casing Vand intersecting Vsaid first bore, a valve slidably mounted in said third bore and having one or more passageways therein and adapted to regulate the supplyof'fuel through `said `first bore ingaccordance with the temperature at a. given pointI within said casing.

8. A control device operable by the. force of expansion or contraction Within a sealed chamber, to control the supply of fuel to va heating unit and comprising a. casing,v a:

fuel sup-ply passageway .leading through said'ca'sing, saidv casing havinga bore therein.. at an angle to said .passageway and defining an expansion. chamber, a. pistonarranged VVWithin. the upper .portion of 4said bore and havingone or vmore ports therein. and adapted to be actuated by the expansion or contraction .of the lfluid within expansion .chamber to regulate the How of fuel through said passageway v in accordance with the temperaturepivithin said expansion chamber.

y In testimony whereof, I .hereunto affix my signature.

.imams Ross

Images