USRE16985E - Steam-heatimg system - Google Patents

Description

June 5,1928, Re. 16,985 E. SHULTZ STEAM HEATING SY$TEM Original Filed June 12, 1926 V Qffzvenfzfi":

Earle 5771: if;

Reis'aued 5, 1928.

UNITE STATES Re. 16,985 PATENT OFFICE.

EABLE SHULTZ, :OE GHICAGO, ILLINOIS, ASSIGNOR '10 WARREN WEBSTER & GOI- PANY, OF 'CAMDEN, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

STEAM-HEATING SYSTEM.

Original-Io. 1354;759, dated January 3, 1928, Serial 1T0. 115,624, filed June 12,1926. Application for reissue filed February 25,

This invention relates to an improved system whereby the quantity of heat supplied to the heating system of a building, in, order to maintain in that building a constant temperature, is automatically regulated to be the amount necessary to replace the heat lossesfrom the building caused by the difference in temperature between the interior of the building and the exterior air, and by means of which the quantity of heat supplied to a building during the night, or other periodsaof limited or non-use, can be automatically reduced or shut off entirely for a length of time dependent upon the difference between the inside and outside temperatures; The important object of the invention is to accomplish these results by means of simple and eflicient mechanism an arrangement operatingentirely automatically under the control of temperature and time.

My improved regulating system is applied to heating systems in which a heating element such as steam is supplied to heating units such as radiators. Each radiator is, in accordance with my regulating system, provided with a restricted or metered inlet orifice, and in the steam supply pipe for the radiators is inserted a pressure regulator or reducing valve which is so set or adjusted, that if unhindered, it will permit flow of steam at the'maximum pressure needed to' supply the maximum quantity of heat to the. heating system. With this pressure regulator I associate an operating member or adjustment varying member preferably in the form of a solenoid whose energizing circuit is in turn controlled by a relaysole noid, and for controllingthe operation of this relay-solenoid, I adjust its electrical circuit by 'a temperature controlled regulator subjected preferably to' the temperature outside of the building in which the heating is being regulated. i

There aretimes, as for example during the night. when-it maybe desirable to reduce or to shut off the heating, entirely- I also provide as part of my system airegulator which is controlled conjointly by the outside temperature and'the time tomodify the operation of the operating solenoid to cause the reduction in or shutting off of the heat supplied to the radiators. This regu- 1928. Serial No. 257,040.

lator means automatically determines the portion of the day during which normal heat shall be supplied and that portion of the day or night during which the supply shall be reduced or cut off.-

Another important object of the invention is to provide such structure and arrangement that, upon failure of any of the various regulating devices to operate properly, the heat will be turned on full, thus preventing any damage to the heating system or the building by freezing.

Referring now to the drawings, the figure representsdiagrammatically the various operating and controlling elements, electrical circuits therefor and the cooperation thereof to produce'the results hereinbefore enumerated.

The heating system shown comprises the radiator units 1 connected with a supply pipe and with a return pipe 3 through which the condensed steam goes back to the boiler. In thesteam inlet of each radiator is a restricted orifice 4 which may be in the form of a metering bushing or nozzle structure ordinarily used for restricting the flow of fluid.

Interposed in the steam supply pipe 2 is the pressure regulator or reducing valve structure 5 which may be of any standard make, and by means of which is regulated the pressure under which steam will flow to the radiators of the heating system. In the type of valve structure shown, the valve plug 6 is secured on the stem 7, a spring 8 pressing against the valve plug and tending to hold it in closed position. At its lower end the valve stem ispivoted to the inner end of a balance lever 9 which close to the valve stem pivot connection is pivoted on thebracket 10 extending from the valve frame, the outer end of the lever adjustabl receiving the weight 11. In accordance wit my invention, this weight is placed and remainsat that point on the lever at which the valve 6 will be positioned to permit the .steamfnto flow ate the 'maximum pressure needed to supply the maximum vquantity of heat the heating units. The operation of my system then contemplates modificationof such valve setting or adjustment under sponsive r sponsive member may be of any special or The operating solenoid A forms part of the control for the pressure regulating valve and is directly associated therewith. It comprises the solenoid core 12 and the energizing winding 13, the core being connected by a link 14 with the outer end ofthe valve lever 9. The solenoid, under varying degree of energization, will oppose the pull of the weight 11 so that the arm will be raised and lowered to vary the adjustment of the pressure regulator valve structure 5.

he operating solenoid is controlled in accordance with the variation in the temperature of the outside air by the regulation of the resistance of the solenoid energizing circuit by means of a relay solenoid B, whose operation is directly controlled by variations in the temperature of the outside air. This relay solenoid comprises a core 15 and an energizing winding 16, this winding being included in the energizing circuit which includes a battery 17' and a temperature remember 18. This temperature re- That shown is in the form of a thermometer tube through which extends a resistance wire 19 and in which is mercury 20. The resistance wire is includstandard design.

ed in the energizing circuit for the relay B and as the mercury rises and falls in the tube, due to changes in temperature, more or less of the resistance wire will be short circuited by the mercury and the resistance in the relay energizing circuit thus correspondingly decreased or increased.

The relay core 15 has a rod 21 extending upwardly therefrom which carries-a contact finger 22 in electrical engagement therewith. Extending from the upper end of the rod 21 is a spring 23 which is adjustably an c'hored to a supporting bracket 24 by means of a screw 25. This spring acts in opposition to themagnetic pull of the energizing windinglG 0n the core 15 and tends to hold the core out of the winding. The spring and the energizing winding thus together control the vertical movement of the rod 21.

Adjacent to the path'of the contact finger 22 is a resistance coil 26 with which the contact finger engages during vertical movement of the r0d.21. The lower end of this resistance coil is connected by the conductor 27 with one terminal of the energizing winding. 13 of the solenoid A, the other terminal of the winding connecting through conductor 28 with the supporting bracket 24, a battery 29 being included in the conductor 28. As the rod 21 is vertically moved, more or less of the resistance 26 will be included in the energizing circuit for the relay'A, such circuit being from the batter 29 through conductor 28, spring 23, 1'0 21, contact finger22, resistance 26, conductor 27, and through the solenoid winding back to the battery. As the pressures requred in the heat carrying medium, such as steam,-do not vary in simple proportion to the difi'erence in temperature between the inside and outside of the building to be heated, but as a power of that difference, the resistance 26 has its turns graduated and, in the arrangement shown, the diameters of the turns increasetoward the upper end of the resistance coil so that the resistance will increase more rapidly as the outside temperature falls. Such rapid acceleration of theresistance 26 as the temperature falls will correspondingly reduce the current flow through the energizing circuit of the solenoid will then permit the pressure regulating valve to quickly increase the supply of steam to the radiators. To assist in the proper adjustment of the energizing circuit for the solenoid A, a manually adjustable resistance device 30 may be included in the energizing Cll'Cllll). 1 I u Thus the amount of heat supplied to the radiators is automatically regulated in proportion to variations in outside temperature, as indicated by the thermometer 18. During the day normal heat control is desirable, but during the night, or certain parts thereof, it may be desirable to materially reduce A which or to entirely cutoff the heat supply. Such relay solenoidB. The time controlled r'egu-.

lator comprises a clock 31 whose hour hand 32 makes one revolution in 24 hours. As the hand revolves, it makes consecutive wiping contact with contact pins 33 selectively set at the time divisions of the clock dial, the annular panel 34 of insulating material being shown as supporting these contact pins and insulating them from each other. I have shown contact pins set at the divisions for the hours 1 to 8 a. m., and the hours 4 to 11 p. 111. The pins for the hours 1 to 8 are connected by the conductors 35 with a vertical row of contact buttons 36 on a bar 37 of insulating material positioned adjacent to the upper end of the solenoid rod 21 at the left side thereof. Similarly, conductors 38' connect the pins for the hours 4 to 11 with the vertical row of contact buttons 38 on the at the right of the rod 21. Each bar thus has eight pins and the pins of the opposite rows are horizontally aligned. Contact blades 40 and 41 extend laterally in op site directions from the upper end of the rod 21 for engagement, respectively, with the contact buttons 36 and 38 as the solenoid rod 21 moves vertically, these-blades being insulated from each other and from the rod 21. The contact button supporting bars are preferably adjustable longitudinally as by means of screws 42 mounted on supportingbrackets 43.

bar 39 positioned opposite the bar 36 the armature tongue is connected by a tension spring 48 with the bracket 24 so that as the tongue is swung into engagement with either electromagnet pole it will be held in such position by the spring until pulled out of such position by the attraction of the other electromagnet. A conductor 49' connects the contact blade 40 with one terminal of the winding of the electromagnet 44 whose other terminal is connected with one pole of the battery 50 while a conductor 51 connects the contact blade 41 with one terminal of the winding for the electromagnet whose other terminal connects with the same pole of the battery, the .other pole of the battery being connected with the clock through conductor 52. 7

Associated with the electromagnet 45 is a contact 53 which is engaged by the armature tongue when the electromagnet is energized, and this contact is connected by conductor 54 with a contact member 55 insulated from the re la-y rod 21 but adjustable longitudinally thereon adjacent to the contact finger 22 and being adaptedto engage with the resistance 26 as the rod 21 moves vertically.

The electromagnets 44 and 45, the. contact button bars 37 and 39 and the various supporting brackets may be mounted on a panel 56 on which may also be mounted a guide fitting 57 for the relay rod 21.

\Vith the above arrangement two sets of time circuits are formed. The first set includes the conductors 38 and these circuits may be called shut-off circuits, each circuit extending from the battery through the clock hand,-thro"ugli one of the conductors 38', the corresponding contact button on the bar 39, the contact blade 41, conductor 51, electromagnet. 45, and back to the battery. The other set of circuits includes the conductors 35 and these circuits may be called turn-on circuits. Each extends from the battery through the clock hand, through one of the conductors 35, the corresponding contact button on the bar 37, conductor 49, electromagnet 44, and back to the battery. The electromagnet 45 may therefore be called the shut-ofi' electroinagnet and electromagnet 44 may be called I the contact buttons, reading downwardly,

, correspond with the hour pins to 8, and

on the bar 39, going upwardly,'thecontact buttons correspond with the hours 4 to 11. Therefore, when the contact blades 40 and 41 have been shifted by the solenoid B into engagement with certain contact buttons on the bars 37 and 39, therespective circuits will not be closed until the hour hand engages With the time pins connected with the I respective contact buttons. As the contact blades 40 and 41 receives their -movement from the solenoid B, the particular contact buttons 36 and 38 engaged thereby, is dependent upon outside tempe-rature, and as the contact buttons are connected, each with a particular contact pin onthe clock. it follows that the first closure of a shut-off or turn-on circuit in accordance with temperature will determine the time at which such circuit will have its final closure made 'by the clock hand. The warmer the outside temperature, the earlier the shuteofi' circuit will beclosed, and the warmer the outside temperature, theflater the turn-on circuit will be closed. I

\Vhen a shut-off circuit is closed, the electromagnet 45 will be energized and will draw the armature tongue 46 against the contact 53 and this closes a shuntcircuit including the contact member 55, conductor 54, contact 53, armature tongue 46, spring 48, and the bracket 24. \Vhen the shunt path is closed,

the energizing current for solenoid A, in-

stead of flowing through the spring '23, rod

21 and contact finger 22 to the resistance 26,

will flow through the shunt path to the resistance at a point below the engagement of the contact finger 22 with the resistance so that the current flow through the energizing circuit will be increased proportionate to the resistance removed from the circuit and measured by that part of the resistance coil '26 between the contacts 22 and 55. Such reduction in resistance causes increase of the current flow through the energizing circuit and greater attraction of the solenoid core 12 so that the pressure regulating valve will be adjusted to reduce the steam flow.

The contact member 55 being adjustable relative to the contact finger 22, the degree of resistance reduction can be adjusted for.

bar should have a length not less than the length of the coil 26-so that if 'the contact member 55- is adjusted to be at a distance froin'the contact finger 22 equal to the length of the coil 26, it will always make contact with the extension 58 and never with the resistance 26, no matter what the position of the rod 21'may be during its range of movement. If the contact member 55 is at v Jthe posit-ion of the rod 21.

a less distance from the contact finger 22, it will either make contact with resistance 26 or with the extension 58, depending'upon As soon as a turn-on circuit is closed, the electromagnet 44 will withdraw the armature tongue from the contact 53'to open the shunt circuit, and the energizing circuit for the solenoid A will be controlled directly by the movement of the contact finger 22 to effect normal heating regulation. The time controlled regulator thus determines during what portion of the day there shall be normal heat regulation and during which part of the day or night the heat supply shall be reduced or cut off.

Briefly reviewing the operation, the drawing shows the 5 oclock a. m. turn-on circuit closed, which means that the temperature issuch at 5 oclock in the morning that the heating system should begin its operation under normal control. If the outside temperature were lower the current flow through the solenoid B would be less and when the outside temperature is comparathe rod 21 would be correspondingly raised by the spring 23 to set the turn-on circuit for final closure by the clock. For example, if the rod 21 had been raised to the button connected with the three oclock pin, .then

when this pin were engaged by'the hour hand at 3 oclock a. 1n. the shunt circuit would have been broken and the heating system restored to normal control. If the outside temperature were high. the turning on of the system for normal regulation would be delayed.

The normal regulation continues usually during the day. and reduction or shut-ofi of the heat is desirable at night at a time detively low,- closure of the shut-ofi circuit may be delayed until say 11 oclock p. m.

It will be noted that in the case of accidental opening of the energizing circuit for the solenoid B, the spring 23 would raise the rod 21 to cause the contact finger 22 to include all the resistance 26 in the energizing circuit for the operating solenoid A sons to de-energize this solenoid and permit the weight 11 to adjust the pressure controlling valve for the full flow of steam. Likewise, should the energizing circuit, for the solenoid A accidentally become interrupted, the solenoid would be tie-energized and the pressure regulating valve would turn the steam on full. The heating system would,

therefore be protected against freezing during cold weather should such accidental current interruption occur.

I thus produce asimple, reliable and eflicient regulation system which, in accordance with variations in outside temperatures, accurately controls the supply of heating element to heating units, and which automatically reduces or entirel shuts oif the heat supply to the units durlng desired time periods.-

I claim as follows 1. In a heating regulation system, the combination with a pressure regulating valve for regulating the pressure of fluid heating medium, of an operating electromagnetic device connected with said valve to control the operation thereof, an energizing circuit for said electromagnetic device, an electromagnetic relay controlling the resistance of said energizing circuit, an energizing circuit for said relay, and a device responslve to outside temperature for controlling said relay circuit whereby said ,operating electromagnet will control said valve in accordance with variations in outside temperature.

2. In a heating regulation system, the combination with a regulating valve for regulating the flow of heating fluid to a. heating system, an electromagnet device connected with said valve to control the operation thereof, an energizing'circuit for said device, means automatically controlled in accordance with variation in outside temperature for adjusting the resistance of said energizing circuit, and time controlled means for automatically modifying said energizingcircuit at predetermined time periods.

'3. In a heating regulation system, the combination with a regulatin valve for controlling the flow of heating uid, of an electromagnetic device connected with said valve to control the operation thereof, an energizing circuit for said electromagnetic device, a variable resistance for said circuit,

means controlled by outside temperature for adjusting said resistance, and time controlled means for automatically modifyingsaid resistance at predetermined time periods.

4. The combination with a heating system,

of a regulating valve, an operating electromagnet device for operating said. valve, an energizing circuit for said device, and temperature controlled and time controlled mechanisms cooperating to adjust the resistance of said energizing circuit and thereby control the operation of said operating de-- vice.

5. The combination with a heating system,- of a regulating valve for controlling the flow of heating medium tosaid system, an electromagnetic operating device connected to control the operation of said valve, an energizing circuit for said device, a resistance for portioned said circuit, means controlled in accordance With outside temperature for adjusting said resistance,

and time controlled means cooperating with the temperature controlled means forshort circuiting part of said resistance at predetermined times.

6. The combination with a of a regulating valve for regulatin of heating fluid, an electromagnetic operating device connected with said valve to con-' trol the operation thereof, an energizing circuit for said device, a variable resistance for said circuit, a relay electromagnet associated with said resistance to control inclusion thereof in said circuit, an energizing circuit for said relay automatically controlled" in accordance with outside temperature, a shunt circuit for shunting part of said resistance, and time and temperature controlled means cooperating to determine the closure of said shunt circuit.

7. The combination with a heating system, of a regulating valve. for regulating the flow of heating fluid, an electromagnetic operating device connected with said valve to control the operation thereof, an energizing circuit for said device, a resistance for said circuit for controlling the current flow therethrough, a shunt circuit associated .with said resistance, and clock controlled means for controlling the connection of said shunt circuit.

8. The combination with a heating system, of a regulating valve for regulating the flow of heating fluid to the system, an electromagnetic operating device connected with said the flow regulating valve to control the operation thereof, an energizing circuit for said de vice, a' variable resistance for said circuit, temperature controlle means for controlling the adjustment said resistance, decrease ot-said' resistance causing said operating device to control the valve to decrease the heating fluid supply, a shunt circuit associated with said resistance, and clock controlled means governing the connection of said shunt circuit, closure of the shunt circuit decreasing the resistance independently of said resistance adjusting mechanism.

9. In an automatically regulated heating system, the combination of heating units each having a restricted inlet opening so prothat the quantity of heat carrying medium admitted to the unit can be regulated by variations in pressure in the heat carrying medium, a pressureregulator for var ing the pressure in the heat carrying me ium, and a temperature controlled regulator for automatically controlling said pressure regulator. v

10. In an automatically regulated heating system,; the combination of heating units each-having restricted inlet openings so proportioned that the quantity of heat carrying medium admitted to the unitcan be reguheating system,-

for modifying Sure regulator to latedby variations in pressures in the heat carrying medium, apressure regulator for varying the pressure in the heat carrying medium, operating means for automatically controlling the. operation of said regulator, means dependent/upon outside temperature for controlling the operation of said operating means, and additional means controlled conjointly by outside temperatureand timed the operation of said operating means to cause operation of said presdetermiued time period the quantity of heat' supplied to the unit. a

11. In combination with a heatingsystem comprising heating units, a pressure regulator for varying the pressure in the heat carrying medium, operating means for operating said pressure regulator, means dependent on outside temperature for auto matically controlling the operation of said operating means to cause operation of the pressure regulator in accordance with outside temperature, and additional means controlled by time and dependent upon outside temperature for modifying the operation of the operating means during predetermined time periods to cause adjustment of the pressure regulator to shut down the quantity of heat supplied to the heating system.

12. The combination with a heating system, of a regulator for controlling the flow of heating medium to said system, an electromagnetic operating device connected with said regulator to control the operation thereof, an energizing circuit for said device, a' variable resistance in said circuit, a relay electromagnet device and a contact moved thereby in association with said resistance, an energizing circuit for said relay electromagnet and a device responsive to outside temperature for controlling the current flow through said energizing circuit whereby said resistance will be adjusted to control the energizing circuit for the operating'electromagnet in accordance with outside temperature, an additional contact adapted totravel reduce during a certain prewith said first mentioned contact in 'association with said resistance, a shunt circuit including both contacts, coils in said shunt circuit causing short circuiting of that part of the resistance which is between said contacts whereby the op'eratibn of said operating device will be modified, and time controlled means closing said shunt circuit at a certain time, dependent upon the outsidetemperature at such-time.

13. In combination with a heating system comprising heating units, of a regulator for regulating the flow of heating medium to said units, an electromagnetic operating device connected with said regulator to control the operation thereof, an energizing circuit for said operating electromagnet, increased current flow through said circuit causing opera.-

. perature for moving to vary the amount energizing shut-01f circuits each including said electromagnet, a time device for causing a shut-oil circuit at a certain time dependent upon the outside temperature at that time whereby the shunt circuit will be closed and the resistance in said energizing circuit reduced to lating valve,

adjust cause operation of the operating device to said regulator for decreased flow of heating medium, and a second electromagnet controlling the opening of said shunt circuit, turn-on circuits each including said second electromagnet, and a time device for causing a circuit through said second electromagnet at a certain time dependent upon the temperature at such time whereby said shunt circuit will be opened and current flow through said operating device restored to normal.

14. In combination with a heating system comprising heating units, a regulating valve for regulating'the flow of heating medium to the unit, an electromagnetic operating device controlling the adjustment of said reguan energizing circuit for said device, means dependent upon outside tem perature for regulating the current flow through said energizing circuit, and additional means controlled by time and outside temperature for modifying the current flow through said energizing circuit during a certain period whereby to cause adjustment of the regulator valve to decrease the quantity of heating medium flowin to the heating system during such peri p 15. In combifiation' in a heating system, a

plurality of radiators, a common supply 'diators, each radiator main for supplying heating fluid to said rasupply'main through a regulable but normally fixed orifice to control the rate of flow to the respective radiators for a given'pressure in the supply main, andmea'ns responsive to temperature to regulate the pressure of the heating fluid in said mains.

16. In 'a heating system, the combination of a supply main for heating fluid, a plurality of radiators having\connection with said ma1n through orifices for controlling the relative flow of heating fluid to each radiator, a pressure regulator in the supply main for. maintaining. a 7 given pressure of the heating fluid supplied to said orifices, and

being connected to the means responsive to temperature 'for controlling the setting of said regulator.

17. In a heating system, a radiator having a fixed orifice to control the inlet of heating fluid thereto, a supply main for heating fluid to be supplied to said orifice, a pressure regulator for holdin a predetermined pressure upon said oriii ce, and temperature responsive means for controlling the setting of said regulator so that the rate of flow of heating fluid through the orifice to the radiator is adjusted to the requirements for heat to be given as by the radiator. I

18. In a heating system, the combination of radiators each having a restricted inlet opening so proportioned that the quantity of heat carrying medium admitted thereto can be regulated by variations in the pressure of the heat carrying medium, 'anautomatic pressure regulaton'for varying the pressureof the heat carrying "medium, adjustment varying'means for varying the adjustment of said automatic pressure regulator, and temperature controlled means governing said adjustment var/y ng means.

19. In a steam heating systempthecombination of radiators each havinga restrict- I ed inlet opening so proportloned that the quantity of steam admitted thereto can be regulated by variations in the pressure of the heat carrying medium, an automatic regulator for varying the pressure of the can be regulated by variations in the pres-- sure of the heat carrying medium, an automatic pressure regulator for controlling the pressure in the heat carrying'medium, regulable means for varying the setting of the pressure regulator, and temperature controlled means governing such regulable means Whereby'it may automatically vary the setting of the pressure regulator commensurate with variations in temperature.

' 21. In a'heating system for-a building, the combination of a plurality of radiators therein each having arestricted inlet ing so proportioned that the quantity of heat carrying medium admitted thereto can be regulated by variations in the pressure thereof, an automatic regulator for varying the pressure of the justment varying means for varying the adjustment" of said pressure regulator, and thermally sensitivemeans exposed to variations in temperatures external to the building for governing the adjustment varying means.

carrying medium admitted thereto openheat carrying med1um, ad-

22. In a heating system for a. building,

the combination of a plurality of radiators therein each having an inlet opening so proportioned that the uantity of heat carrying medium admitte thereto can be regulated by variations in the pressure of the heat carrying medium, an'automatic pressure regulator forvarying the pressure of the heat carrying medium, regulable means .for varying the setting of the pressure regulator, and temperature controlled means governing said regulable means whereby it may automatically vary the setting of the pressure regulator commensuratewith variations in the atmospheric conditions external to the building.

23. In a heating system, the combination I of heating units having each a restricted inopening so proportioned that the uantity of heat carryin medium admitted thereto can-be regulate by variations in" the pressure'of the heat carrying medium, an automatic pressure regulator loaded to a variable degree for varying the pressure of the heat carrying medium, means for loading said regulator to avariable degree comprisin motor means and a temperature controlled device for'governing the action of said motor means.

25.- In a heating system for a building, the

combination of heating units each having a restricted inlet opening so proportioned that the quantity'of heat carrying, medium admitted thereto can be regulated by variations in the pressure of the heat carrying medium, a loaded diaphragm pressure regulating valve for automatically regulating the pressure of the heat carrying medium, means for varying the loading of said valve comprising motor means and a temperature controlled device subject to temperature outside of the building for governing the action of said motor means.-

In witness whereof, I hereunto subscribe my name this 1st day of February, 1928."

EARLE/SHULTZ.

, DISCLAIM E R Re. 16,985.Earle Shultz, Chicago, STEAM Hns'rme SYsrnM.' Patent,dated June 5, 1928. Disclaimer filed December 10, 1934, by the assignee, Warren Webster cfc Company. s Hereby enters this disclaimer to those claims which are numbered 9, 15, 16, 17, I8, 119, 20, 21, 22, 23, 24 and 25 in said reissue patent, and which are in the following wor s, to wit:

the heatjca medium, a pressure regulator for varying the'pressure 1n the heat carrying medium, and a temperature controlled regulator for automatically controlling I said pressure regulator. v Y

15. In combination in a heating system, a pluralityof radiators, a common supplymain for su plying heating fluid to said radiators, each radiator being connected to the supp y main through a regulable but normally fixedorifice to control the rate of flow to the respective radiators for a given pressure in the su ply main, andl means responsive to temperature to regulate the pressure of the heating fluid in em mains.

. the relative flow of heating fluid to each radiator, afpr'eissure 'ieglulaton 111i]? supply u1 supp e tosai o ces,an

requirements for heat to be given off b the radiator.

18.11! a heating system, thecomb .ihlet op um; so proportioned that the quantity of heat carrying medium admitted jthereto can 0 regulated b variations in the pressure of the heat carrying medium, -Ian-autornatic pressure reg atorfor varying the pressure of the heat carrying medium, 1 adjustment varying means for varying the adjustment of said automatic pressure regulator, and temperature controlled means governing said adjustment varying means 19. In a steam heating system, thecornbination of radiators eachhaving a restricted inlet opening soxproportioned that the uantityof steam admitted thereto can 'be' regulated by variations in the pressure of t e heatcarrying medium, an; auto; matic regulatorjor varying the pressure of the steam, and means for automatically varyifig-thesettlng of the pressure regulator commensurate with variationsof tem- JPG 20. In a heating system, the combination of radiators eachhaviug a restricted inlet ope so proportioned that the quantity of heat carrying medium admitted thereto 03% regulated by variationsin the pressure of the heatcarrying medium, an automatic pressure regulator for controlling'the pressure in the heat 0 A medium, regulable means for varying the setting of the pressure regulator, and tem- 'cally vary the setting of the pressureregulatorcommensurate with variations in a temperature. 7 f 21. In a heating system for a .building,-the combination of a lurality of radiators therein each-having a restricted" at opening so. pro ortioned t at the quantity of heatmedium admitted thereto ean b'e reglfiated by variationsin. the

- regulator, and thermally sensitive means exposed to yariations in temperatures external to the for gove theadjustme'ntvarying means. v i r 22. In a heating system for a Euilding, the eombination of a plurality of radiators therein each having an inlet opening so proportioned that the quantity of heat oaT'ng mediumadmitted thereto can be regulated by variations in the pressure of the eat carrying medlum, an automatic pressure" regulator for varying the pressure i of the heat medium, regulable. means for,varying the setting of the pressure regulator, and telgfilerature controlled means governing regulable means whereby 1t may automati y' vary the settingoffthe p'ressure regulator commensurate with variations in the atmospheric conditions temperature controlled device for governing the action of said motor means.

23. In a heating system, the combination of heating units each having a restricted inlet opening so proportioned that the quantity of heat carrying medium admitted thereto can be regulated by variations in the pressure of the heat carrying medium, a pressure regulator for varying the pressure of the heat carrying medium, means for loading said regulator to a variable degree comprising motor means and a 24. In a heating system, the combination of radiators each having a restricted inlet opening so proportioned that the quantity of heat carrying medium admitted thereto can be regulated by varlations in the pressure of the heat carrying medium, an automatic pressure regulator loaded to a variable degree for varying the pressure of the heat carrying medium, means for loading said regulator to a variable degree comprising motor means and a temperature controlled device for governing the action of said motor means.

25. In a heating system for a building, the combination of heating units each having a restricted inlet opening so proportioned that the quantity of heat carrying medium admitted thereto can be regulated by variations in the pressure of the heat carrying medium, a loaded diaphragm pressure regulating valve for automatically regulating the pressure of the heat carrying medium, means for varying the loading of said valve comprising motor means and atemperature controlled device subject to temperature outside of the building for governing the action of said motor means.

[Qflio'ial Gazette, January 1, 1935.]

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