US1440673A - Heating system - Google Patents

Description

1,440,673 H. G. GEISSINGER. HEATING SYSTEM aan. 2, 1923.

ORIGINAL FILED SEPT. 9. 5 sHEEvs-SHEET ll mmf EN. .o QW

lm., 2 T923.

mmm

H, G, GEISSINGER. HEAT NG SYSTEM 0R G NAL. Fl LED SEPT.. 9, 1918.

5 SHEETS-SHEET 2 H. G. GEISSINGER. HEATING SYSTEM jms 9 1923 ORIGINAL FILED SEPT. 9, 1918. 5 SHEETS-SHEET 3 Jam@ 2, mo @9414@573 l H. G. GEISSINGERy HEATING SYSTEM. ORlGlNAL FILED SEPT. 9. 1918. 5 SHEETS-SHEET 4 I |57 i 6/ @g5 E 5@ m'ml Jlo 29 H. G. GEISSINGER.

HEATING SYSTEM. ORxslNAL Flu-:n SEPT. 9, 1918. 5 SHEETS-SHEET 5 y L\\ n. 7

l 53 f4 4M77/`g '521;

y lachiufsaif u Patenred lair 2,

G. GEVlSSNGE-R, 0F NEW YORK.

' there Y., vASSEGNO@ T0 VAPOR CAB. HEATING coarrririmmo, or crrroaeo, rumors, A coaroaafrron or new YORK.

HEATING SYSTEM.

,Applieaton led September 9, 19'18, Serial No. 253,322. Renewed .August 21, 1922. Serial No, 583,434.

.To all wlmi/'z t may conoci/nf.' y,

-Be it known that l, Harrer Gr. Giiissrreicr., a citizen'oi the United States, residing at ew Yorlf in the county orf l'flew York and Grate of New York, have inrented certain vnew and useful improvements in `@eating et which the 'following' is a speci- 4 ation. I `My invention relates to a heating system tor railwav cars and more particularly to low press'. v steam or r'oer system, although, in. broader aspects the invention is not liu'iited in its application to a heating' system of this particular type.

The construction herein described is a modification oi' or improvement. on the apparatus dei-'cubed and claimed in iny cepend- Vingy application Serial No. 9.5855521A 'iled .filepteniher 9, 1918 (patented as No. 1.404559 January A24th.y i922).

im i entr consists o. i., nomi .in-i

arrangements and devices. to he herein; described ano.

rlaiinec, for carryin g out rtain objects and L. n.. ,Y cyrille? is hotter the Lhe car he orerheatef i'ved entirely or its h eat at the water pipes and other 'leraloly a lved hy air from the the earj AFor shifte radiator valve under the control of a i thermostat@ device wil'1 i the car. together with certain arrangements for a( `ustahly atie ra diav ina' to the easing' of tl ishingr an aeuistment tor Valve and l of the connectionsvbe V trie motor and ralfe sothat this part o' the mechanism will operate properly; the capacity for adjustment in these respects being highly desirable ir" .not indispensable for the successful. operation of the apparatus underworlring conditions.. l I

To construct the air motor and, generally, the air system ot the apparatusso that there will he no leakage of air therefrom at any point.

To provide a suitable electrically actuated mechanism to which current may loe supplied., tern ofthe car, for governing the application oi air pressure to the motor of the radia-k tor valve iin-der the control of a therlnostatic mechanism located inthe Car. l

Ut incidental objects of the invention will appear from the 'following' description oi' the i'ire'l'erred embodiment of the invention iliustrated in the drawings appended .in these drawings y y gli" l is a. diagrammatic View illustrating the system. as a whole.

Fig'. 2 is a sectional plan orf the radiator fe-ivea Fic. Sis a: sectionalplan ot the emergency i relieving; 'the air ino-tor of pressure when necessary.'

Figa'. 4l; is a plan View of the radiator valve h the operating; motorsecured thereto.

5i 5 is a View7 in elevationrot the 'Valve and inotor showing'. the racheter-pipes and air inlet pipes in section.

Fig. 6 is a side View of the partsshown in the prece-dirp; two figures.

Fig'. 7 is a 'iraoj'cie-.ntary View, somewhat .ian'iinatie in characterj Correspendingto for example, lf'roin the lighting sys-H `general organization olf the apparatus, A. designates the steam train pipe ot a railway car, B one of the radiators of the car, C a Ytou,if-Way 'Valve arranged between the train pipe and radiator for controllingthe 'flow ci medium to and troni the radiator, D one ot the pipes ot the air system of the car, E a compressed air-actuated motor 'for operatingthe radiator valve7 F an electroanagnetieally operated air Valve for governing; the' air pressure admitted to the air motor` and a thermostat located at a suitable place in the apartment of the car for controlling thecurrent to' the magnet et 'the air Valve F. The

heating; system shown for the purpose of `valve by hand. Emergency cock .l and the electro-magnetic air Valve F are preferably arranged in a cabinet at one end oi the car indicated in outline at li.

Before pioceedineA to describe in detail the con. fruction of the various instruineutalities composing' thev preferred embodiment ot my .invention shown in the drawings l will briefly outline the operation et the apparm tus in connection With the diagram, l.

The four-Way valve normally stands open,

as shown in Fig. f2. lt is held n this position by a spring 25. Steam from the train pipe A passes through pipe 26, and Vapor regulator into chamber 27 ot the four- Way valve` thence to chamber 28 ot the tourway 'valve and into the inlet pipe 29 oit the radiator B. 'lhe medium passes out or the radiator through outlet pipe 3Q faire chainA hers 3l and 32 and discharge pipe 33 which leads to the therrliostat chamber ot the ya@ por regulator this chamber bein open to the atmosphere. The construction ot the latter is familiar and need uot be ileecribed in des tailr lt will be understood that wl .n steam reaches the thermostat oit' the vapor regula tor the valre of the regulator is thirittled down so to limit 1--,[io-W. if this nieai Awaste of steam tr the rm ,torqv which is open at discharge end, is prevented the medium being* circulated through the radiator at a pressure not substantially above atmospheric pressure.

The thermostat G is adapted to maire. and break normally closed electric circuit 34, 85 which is connected by leads El@ c? With source ot supply ot electric current. For example, the circuit may be a shunt from the electric lighting` system ot the car. The thermostat is set to brealr circnitli, 35 at a. rise of temperature to a given point. For exif niple, il? the thermostat is employed for maintaining; a proper heat in the car during` periods ot occupancy it may be set to break the circuit `when thetemperature oit the car reaches C ldlahrenheit, shown as consisting` ot an arc member 3S which is adapted to bear against the contact 39 and a chord member 40 ot greater expansibility than the are memberN rlhe deformation olf the structure due to rise of temperature causes member 38 to draw away 'trom contact 39. For all temperatures under the temperature .for which the thermostat set member S58 bears upon contact 39 so as o maintain circuit 34, 35 closed.

Fig. l. thereforeq shows the car at a temperature below seventy degrees.. The radiator valve is open and ator is reeirine eteain to the ex .ction or the 'vapor reg4 veinperatu re in th i d by the "lllhen the Llater li. apartment of the car rises to ZOO Fahr-enheiti or such other temperature as the thermostat may be set for., the circuit 31h 35 broken ard current flows through a shunt circuit 41.., in which is arranged a resistance M and the actuating magnet 43 ot' the air 'valve l?. The resistance ot, circuit lll, mi i cater than the resistance of circuit when the l=- 'ter is closed there flicient current passing; through magnet 3l-ll to e'llect a change in 'the position oit the air controller F. lil-.lith circuit 35 broken. magnet 4t?) will be energized so that air taken trom air system D directed throueh pipes lili? 425 to the air motor lil I lich is thereby actuated to close the radiator valve., moving the valve men'iber thereof .,oin the tull line po- -sition to the dotted. line position. Steam now passesftror-i the chamber to the outside Pipe 'ifi leads y idei' Si?.

ston .valve 52 arranged to operate in the differential cylinders 4W. 5,0, `The lower piston 53 ot this valve closes a port 541-. between the magnet chamber 4i? and cylin* der 50. rl`he nr L) iet chamber has an exhaust port 55 in the bottom and a double telve 56A which is the armature ott magnet 4h37 nor mally closes port 55 but is raised, when the The thermostat isl cylinder 4S pency it umay he. desirable `-tent 'discomfort to the, pasf.=enersA to :pi-o-A vide :tor thenifinual operiation 'of the nadia- .i. ,1w C 1Q 1l b n" Loi ia we [f anceLs` as )een .noie V ce1 tainl arm in conne-cien with the desciziphonof the d ef.,

hilflos/3 magnet is eneigfized, toopen Athis port and elose port 541.. 'Whhn theymagnet is deeneijgrized7 that is to say7 when the teinpei'atui'eis Below that at Which theiniostat G is set to operate, air pressure troni pipe is aoplied to the upper oiiai'geiypiston 5T oft' the" l'nihie yzihe 52 so that thepoit is Closed.` When the magnet is eneigizeddue tothe breaking oit (-.ii'cuit PA, 3 5 hy the thermostat G, Valve 56 is moved to open exhaust port ind to Close port 54h Piessure yis relieved troni the c lindef`18, the double .jelwe 52. is iaijsed'and nii' pressure passes iioin' pipe 44 through Doit Aand cyhndeif() into inpej. and

thence te the aii motor. latter cohsists et zifstationei'j'/ piston anda niovahleeylindex .5i-L the cylinder earjfing iack@ which meshes with a sector ge" rl-.enthe reif'oluhie'iiaive ineinhei" Got e... .i 'tony-Way Valve. The paifts are sho pliied and. purelyv di l being; incite completely ..ihistfeted inthe othei' figures which.will` he iefenied to hereafte. The movement oitthe Anach closes the i/'ahe meinher e6. putting' .spring 25 under tension. s i

Jtith'this arrangement itwilihe observed that the radiator valve is normally held open hy spring; Theetoi'e it the contmllingstops functioning; due7 i'oi 'ex-` aniplei. to the teihueoi the lightine system ot the ce oihieh et anfpiess ail" system, the caff." Wilhnotvhe vclnoiivedl oi" As a railway 1oassengei` cai." con..

its heat. tains water pipes, tanks, and'"o thei1` Axtuies centaining Watei itis deeidediy. preferable to have the esi: oveiheated rather than man the 'ijish :oA f*'eesin.g Water pipes and fixtures through lac-h of proper heat in the cai, n case,y however, such failure of the -contiol ineehanisinoccuis duringpeijiods oi occu- 11 he..` described ein ent s. Whilchj w tailed',constuction of theialife .opeating 'meten fn case the conteo vanpstratusshouldf ltoix t toV he. ifeee,

u.in1 y evohihle .valve nieinhei" of three# W1. y ev than; the ff'uU hne no@ ion d esiej. nate..." lautoma if. coi vvto the {flotte-d line '.aosition designati.

s' 'Accumulatedmi' in ssn re in cylwilinext s .tue-tion 1ct] uidl pifessure lor 'ain motoi- E sa'own in e to ll, inchisve"` The opn in inuch sinianimatie "winner in.

'nio which valves of this type "the i'ixed'stop 78, n order eineigeiicv 59 ofthe inotoi canfthen tind exit in .this nosition, shut of? the suppiv i'esciihe.y the preferred rvconu pon a hase Gu/hich is adjustahly elainpe'd to theour-way Valve C by ineens, which will.

he heiei'natter descihed, The hase ofthe s formed with a circular opening '65 through Whichpiojeots the stein 660i the i'evoluhie valve inenhei.' 46 o the tout-Way waive vThe sectoil gear 6l is secuied-to the stein 66 of the 'valve 'a nut G7, theendot stein GG'heing tapei'ec and vsquare in Across section as indicated A68. The rack 60 which .meshes therewith recessed at 70 to @provide lugs Z1 through' which extend, 'iooselyedjusting and' pivot screws 7 2 that serew into e lug' 73 on the cylinde1-59. The i'ach veanpivot upon seiews 72 so that when necessai'v 'io disconnect the inotoi itifoni the waive this may he done hy Ltinning," hack thev rech indicetedfin dottedlines Fig. "he 'longitudinal' adjustment .ot :the meh; on the cyhndei, which can he' accomplished hy .ff fheadjusting scheiss 79 in and out, is nin v toi thevpuipose oi' positioning: the mok on the cylinder and `with respect toy the vsectoi gear so that atfthe outstroke oit the Winder the head Z4 et the'.Cylinder7 with Veivesj .of this type hein?r provided with hated hy hand)` andthis iei'etion. ofthe-parts made possible' hy ;f .f]onp;jtudina1 adjustii ot.' the iaek on the e,11indeigf The cyh. ineei.' is oimed3vith girooves'foi' guiding;

one `end to en nw'vd ot' screws :ewed into Th hoi'e con# iwith. i hiet to ifhefl'lj ieedsthe air t The here ST closed hy a phi'g; 89

e pointed extremity 91 of which. projects into 'the `oiifice `oi.: 'diestein Se et' the piston. By adjus' .n o' the plug `90 the velocity ot the entei v theniotoir,l

f I.. D may he Vafied so as to `make theaction of -tile inotoidsiowei'oi? mojfe rapid, as may be Ydesired A; stop screw '92 extends through 46 ot the valve andj, .1

lace` hetoie stopv Ine-ets lthe stopl 78 stehst. hecause their ail-e oi'dinlii'iiji manipu n se piston nds an adjustable point'- iso ` `the support 81 to providean adjustable abutment for the cylinder 59 on its back stroke.

The back s yrohe ot the cylinder 1s brought about, when the cylinder is relieved of pressure,rby means' oil `the spring 25. The spring attached at one cn-d `to a stud on an upright member 9L; projecting from the base 04rothe motoraud at the other end enone extremity ofthe lever95 which is pivoted on a stud 96 fixed to a projection 9'! on the base otthe motor. The other eX- tremity ci the lever hears against a stud98 von a lug-09 'formed on the Vcylinder 59. rl-he forward head 100 'of the cylinder at vthe forward end thereof is secured to the cyl- 4inder by' screws 101, a packing 102 being interposed between the head and cylinder so as toprevent any leakage of air.

The radiator valve C is a tour-Way valve oit a construction commonly used in connecon with 'VPOI lcar heating" Systemsfthe sector gear 61 taking the place of the usuall handle. The stem 66 oi the revoluble valve member l5 extends through a bonnet 103y outlet pines 29, 30 are tapped. A. screw 108 passes through the base and lug 106 and has a threaded engagement with a nut 109 which is designed to lit a'ainetthe under diaoonal Jface ot the bosses. By this `means the Inotor may be clamped more or less rigidly to the valve casing. Another bolt 110 passes through theoppositeedge ot'the base and engages a nut 111 which bears against the are castings and struction and cor counted upen. .In order to accruat lower diagona iaces oifa pair o'heXagonal bosses'112, 112 into which the pipes 26a and 33 are` tapped.y Qn this side of the base there-is no lug;` to bear against the upper di- 141.-,\e'-C+ii'}\ i .1- 1- -106 agana lares or ic Jasses, smy 1 as ug on the iront side of the device, so that byv ,tightening bolt 110 the base of the motor vmay be shifted to'lraise or lovver the rack 69 :th respect to the sector gear on the valvesteni GG oikvthe tour-way valve, as best l i. n T, this ad'pistment being necslioxvu in essary in vieu of Aese valies uour oit 'pai s cannot be Y and rigidly position thc motor with respect to the' tour-way valve -;\.sii1g,.tivo set screws y113 yare threaded through the base ot the motor so as to bear against the top of the valve casing. l y.

I do not make speciiic'claim herein to the construction of the four Way valve and its operating motor shown in Figs. 5 to 11 in- .1. ,44eme elusive, as this subject matter` claimed by itself 1n a copending application tiled as a division Ahereofl November 23, 1918, Serial The preferred construction of the thermostatically operated controller for governing the pressure to the valve motor is 'shown` in F ig. 12. The magnet 43 is arranged ony y -a core 114 which forms part'of the casing r115 defining what has been termed the magnet chamber e7. The lower end ofthe core has secured thereto a *polev piece '116. l The valve structure 56 comprises'an upper valve 4member 117 to control `port 5&1, ajlovver valve member 118 to controll the exhaust portk 55 formed in a plug 119 arranged in the base 120 of the casing '115, and a disc 121 arranged directly under the pole piece1'16, the disc constituting the armature of magnet 43. The valve 53 has set into its face a resilient disc 122 adapted to close the' opening at the upper end of port 54. On the other side ofv valve 53 is a packing 123 adapted 4to close ythe vgland 12a through which the stemofv theldouble valvestructure 52 passes when the latter is in its upper position. The upper valve member 57 of the double valve is provided `with; a packing 125 to prevent any escape of air at this lace. f f

llhile I have described my invention iny a preferred.embodiment it will be under-stood that modifications might'be made Without departure from the kprinciples oi the invention. 4I vvishv it to be understood, therefore, that the invention is not to be considered as limited to the constructions, arrangements and "devices shown and described, the'scope of the invention being defined by claims appended hereto.

I claim: v y I 1. In combination with a railway car having a steam trainpipe, compressed air system and a sourceof supply of electric current, ka radiator locatedin the car having a valve to control the supply of heating medium thereto, an'air motor suppliedv from said compressed'air system for moving the valve v Ito one position, manually'foperated means Jfor moving the valve, lan electro-magnetically actuated controllingv device for governing the airjpressure suppliedl to the motor, thermostatic means `in the car for controlling the current to the magnet of said airk controlled device, and an emergency valve 'for relieving the motor of air'pressure so as to permit the valve to be `moved to another position.

2. In combination Withfa railway car-having a steam train pipe, compressed air sys- -tem and a source of supply of electric current, a radiator located in thecar having a valve to control the circulation of heating" medium thereto, manually operated means for moving the valve, an air motor supplied from said compressed air system for closing said valle, a spring` for opening the valve, a valve adapte-l when in 'one position to admit air to the air motor and in another position to relieve the motor of air pressure, an electro-magnetically actuated valve for, controlling the position 'of said air valve, and a thei'mostatic device which, at arise or temperature in the car to a predetermined point, causes the energization oit' vsaid inagiiet.

ing' a steam train pipe, compressed air system and a source et supply oic electric current, a. radiator locateiil in "the car having a yvalve to Acontrol the supply or heating `medium thereto, an air motor sugpliedicroin said compressed air system for closing said valve, a spring for opening` the valve, an electro-magnetically actuated controlling` device which, when its magnet is energized, allows the air pressure to act on the motor, a normally closed circuit through said magnet, and a circuit breaking thermostat having a normally closed circuit Awhich the thei uostat breaks, at a rise of temperature in the c to a given point and Which less resistanceV than and in parallel tion with the circuit through said magto mai 'ain the medium iii the 'iitiug coil a pressure'not substaniu excess oi atmospheric pressure, a o y valve interposed bet-Ween the vapor lrep"u lator andthe inlet and, voutlet ents of the ot its valve memher, directs steam "from the vapor regulator into the radiating; Acoiland returns medium :trom the radiating coil to the thermostat 'ro-if the regulator, and in `the other position closes theradiator and short circuits steam to the thermostat of the vapor regulator, a spring;l to open said valve, an`

air motor to close the same, an electro-magnetically actuated controlling device which, When'its, magnet is energized, vcauses air pressure to be applied to the motor, electric circuit through said magnet, Aa ciri-uit breaking theremostat having a normally closed circuit Vincluding,- said source of electric current, which the thermostat breaks less y v y l said; air val" e o. ln combination with a railway car hav' a vapor regulator which radiating coil ifvhich,lin one position ou a rise ot temperature in. tie car ttov to admit heating' medium to" the` radiator,

an air motor to close the valve, an air ivalv'ef inotor,a circuit breaking thermostatin a normally closed vcircuit With a source of supply ofi electric current adapted to break its circ at' arrise oit temperature to a given pf'iint,y and means actuated by the breaking or said ,circuit for'operating Y to admit airtothe-v motor.

ln combination ivith'a" railway'ca-r,` a. radiator, a source ofsupply of''heatir iV medium,l a. source ol* supply ofair under pressure and a' source ot4 supplyof electric' current, valve ivljiich normally ystands open to admitjheating medium to vthe radiator, air 'motor to' close the valve,'nan

air valve `to goifern the supply otair pressure to the motorv a circuitbrealring thermostat in a normally closedv circuit with a source or' supply lol' electric current"adapt*- ed to breakv its circuit vat" a riseo tenn-` perature to a given pointaand an electromagne' energized when said circuit is broken for operatingv said air. vallve tov admit airA to the motor. A

ln combination with. la railway car, aV radiator, a" source oi' supplyv of heating -medium, a'source of supply of air under pres#y sure and a source of supply ot electriccurrent, a valve which normally stands openv to admit heating"mediunrto the radiator, air motor to close the valve, anaifr valve adapted to be moved to and held in its operative po-fy Isition tor adm-itting'aiij' to said motor, acin' cuit, breaking thermostat ina normally` to govern the suppl-y et air pressure to the closed iii'ciiitovith vthe source of su''iplypl4v electric current adapted' to break its circuit at a rise of temperature to a given point, andl means actuated by the breaking oi:v said cir` cuit for operating.saidair valve to admit air to thermotoi. l

8. ln combination 'With a railwaycar, a

radiator, a source 'et supply ofV liellii;` me! dium, a, source of supply ot' Vairunder pressure and a sourceot" supply ot electric current, a valve which normally stands open to admit heating` medium tothe radiator, an air motortofclose the valv eanaii' valve to-gov;-A

ics

ern the supply of air pressure to the motoigfa"l l circuit breakinp,l thermostat in a normally` closed# circuit withV the source of supply of electric current adapted tobreak its circuit at a rise oi temperature to a given point,panrjl`V a magnet in a circuit of greater resistance than and in parallel with the thermostat circuit which when energized causes said air` v valve to be opened to admit air tothe motor.

9. ln combination vitli a railway car, a radiator, a source of supply of heating` me-` dium, a source ot supply'ot air under pressure and a source oi' supply of electric cur'- rent, a valve which normallystands open to.' admit heating medium tol the radiator an;

ing a circuit breakin@ air motor to close the valve, an air` valve to govern the supply of air pressure to the motor, a circuit breaking thermostat vin a normally yclosed circuit With the source oi:`

supply of electric current adapted to break its circuit at a rise of temperature to a given point, a magnet in a circuit oi greater resistl ance than and in parallel With the thermostat circuit which, When energized, causes said air valve to be opened to admit Vairto the motor, and an emergency valve for relieving the motor of ressure. y

l0. lny com ination with a railway car, a

, radiator, a source oi sup'ply of heating medium, a source of supply ci air under pressure and `l a source of supply or' electric current, avalve to admit heating mei of temperature to a given point, and a magnet in a circuit of greater resistance than and in parallel With'the thermostat circuit which, 'When energized, causes said air valve tofbe opened-to admit air to the motor. 3G i ll. ln combination with a railway car, a radiator and a source ot supply of heating medium, a valve Which .normally stands open to admit heatingy medium to the radiator, a motor to operate the valve, manually opera"- ed -means for moving the valve, mechanism comprising a thermostat, actuated at a rise ottemperature to a` given point, tor actuating said motor to close said'valve, and means for disconnecting-g the motor from the radiator valve so asto permit the valve to be operated manually.

l2. ln a heating system for a railway car, the'combination of a radiator, a valve Which normally stands open `tor admitting heating A'm'ediiun to the radiator, a fluid pressure actuated motor to close said radiator valve, and a Vcontrolling device for governing the application of motivefluid to they motor compristhermostat having a closed circuit broken )by the thermostat at a vrise oftemperature to a given point. i 13. ln a heating system for a railway car,

the combination of a radiator, a valve which normally stands open for admitting heating medium to the radiator, a fluid pressure actuated motor to close said radiator valve, a v alve to control the now of motive fluid to the motor, a circuit breaking thermostat having a closed circuit broken by the thermostat at a rise of temperature to a given point, and an electromagnet energized when said circuit is broken for opening the valve governing the tloiv ot motive fluid to the moi tor. f

il. in a heatine` s 'stem tor a railwa car s y TY v,

the combination of a radiator, a valvetvhich normally stands open for admitting heating V medium to the radiator, a 'fluid pressure actuated-motor to close said radiator valve,

valveto control the HOW oi motive iiuid to the motor a circuit breakin 'thermostat havpressure actuated motor to close said radiator valve, a valve to control the flow of motive fluid to the motor, a circuit breaking 'thermostat having a closed circuit broken by the thermostat at a rise of temperature to a given point, an electro-magnet in a circuit oiE greater resistance than and in parallel with the thermostat circuit adapted ivhenenergized to open the valve governing the flow ot motive fluid to the motor, and a manually operated emergency valve betr-veen said last named valve and the motor for relieving the motor of pressure.

l/c, ln mechanism tor controlling the flow ot heating medium to aradiator, the combination e a normally open radiator valve, a circuit breaking thermostat in a normally closed electric. circuit, and an electrically operated `device in a'shunt from the aforesaid cii'nuito'll greater resistance thanvsaid circuit which, when energized, causes said radiator valve to be closed.

i 17, ln a heating system, the combination oi a'radiatona valve tol govern the introduction of heating medium tothe radiator,

a fluid pressure motor to operate the valve,

and means tor controlling the application of motive luidto the motor comprising a valve which is itself moved by fluid pressure, an electro-magnetically operated valve for controlling the application or pressure to said lastnamed valve,'and accircuit making andl sov breaking thermostat the operation of Which controls the energization ol the magnet.

18.111 a heating system, the combination oi' a radiator, a valve to govern the introduction oit heating medium to the radiator,

a lluid pressure motor to operate the valve, and means toiycontrolling the application o'i'motive duid to the motor comprisingk a double piston valve, an eleotromagnetically actuated valve which, in accordance with its position, causesthe application or pressure iiuid to 'one end or the other lof said double piston valve and brings about the relief oi pressure from the other end thereoi", and a circuit making and breaking thermostat the operation of Which controls the energization of the magnet.

19. in a heating system, the combination i diameter, a double piston valve arranged in said valve chambers, a magnet chamber having an exhaust port to the outside latmos-A.

pliere, a port leading to the smaller valve chamber adapted to bey closed by said double valve, a port adapted'to be connected with a source of supply of luid under pressure, a pipe connecting the magnet chamber with the smaller valve chamber, a magnet in said magnet chamber, an armature for the magnet and twov valves associated with the armature, one of which closes the port through Which the pressure fluid enters the magnet chamber vvhenthe armature is attracted to the magnet, the other of which closes the exhaust port from the magnet chamber When the magnet is deenergized, and thermostatic means for energizing and deenergizing saidmagnet.

20. Inl mechanism for controlling the flow of heating medium tok a radiator, the combination of a radiator valve, a circuit breaking thermostat and an electrically actuated apparatus :tor vcontrolling the movements ot the valve arranged in a circuit parallel with the thermostat circuit and of greater resistance thanl the thermostat circuit whereby said apparatus Aisactuated only when the thermostat circuit is broken.

2l. Ina heating apparatus, a heatingelement and an .electrically actuated device governing the operating of saidv heating element, and ak circuit breaking thermostat arranged ina circuit of less, resistance than and in parallel with the circuit `oit said electrically actuated devi'ceivhereby said thermostat controls the operation or said device.

22. In a steam lheating apparatus, a radiator and an electrically actuated device tor governing the introduction of steam to said radiator, and al circuit breakingthermostat arranged in a circuit of less resist- -ance than and'in parallel ,with the. circuit of said electrically actuated device whereby the thermostat controls the operation of said device.

23. ln' a'heating apparatus, a radiator, a radiator valve, .a motor to operate said valve, an electrically actuated device to con--` trol. said motor, and a circuit brealringthermostat arranged'in a circuit oil iess resistvance than and in paralleltvith. vthe circuit a heating eleation thereof comprising a circuitvbreaking thermostat'and an electrically actuated device arranged in a circuitnot greater resistance than and in parallel -With the thermostat circuit. v

HARRY e merssirenal

Images