Патент USA US2406088код для вставки
“Aug. 20, 1946. 4 - > P. s. MARTIN ' I I 2,406,088 v HEAT REGULATOR . Filed Dec. 6, 1941 _ 2 Sheets-Sheet 1 ~57 ' \M \W/ Patented Aug. 20,’ 1946 2,406,088 UNI-TED STATES PATENT‘ » 2,406,088 HEAT REGULATOR? Perry S. Martin, Harrisonburg, Va, 7 3 ‘ Application December 6; 1941:, Serial No; 422,011?f ‘I , " ’ "I _ _ y 1 1- ‘ .. I i I 8 Claims. (erase-e5) 1 This invention relates: to draft regulating de vices‘ and has for its-principal object the provif draft tube l8, the frame work or‘chassis l9 sup porting the thermostat‘ ZOand-Y‘the casing 2 l. ' sion of a simple and efficient‘ regulator for use The draft tube IB- is square in vertical cross with space heaters burning solid fuel. ‘ section, snugly ?ttingv the‘ casting l6 and being A further object of the present invention, is 5 ' bolted‘ thereto as at 23', by means of avpairtof to provide a regulator for wood and coal burning brackets 24 spot welded to the end of ‘the draft stoves of a type‘ which will: keep’ the ?re in the tube. Thev rear ‘of' the draft‘ tube slopes at‘ari stove for a long period“ of time and meanwhile angle of about 45° providing a large 0Deni‘l'1g"2-5‘ ‘ will hold: the heat of the room at a constant de which is closed by the main damper ‘ziiipivoted: gree within a small margin; ' ~ 1 on: rod:v 2-‘! extending thru the sidewalls to‘the A still further object of‘ the present‘ invention draft vtube andbeingiheldr against‘ side to- side is the provision'of a regulator for .a coal or'a movement by the two? walls of the casing 21;‘ A wood, burning" stove: which‘ will‘ respond almost pilot valve 39 is loosely pivoted to the main entirely t'oithe temperature of the room when damper" 26,‘ as at 3l:, and carries a zigzag mem therooml is at the normal temperature desired 15 ber 33 serving a dual function, to limit the open and which will to some: extent respond to the ing of the’ pilotvalve 30‘ andeto afford attach heat; of. the stove should the‘. room temperature ment for thecon'trol-ling chain 34' which not only ‘ be below normal, thus giving an anticipating pulls the: pilot valve closed, but, preceding this action to the control.v ’ act, pulls the main. damper'shut. The upper Other objects of the. invention relate primarily 20 surface of the pilotdamper is much larger than to details and are more speci?cally set forth in the opening 361'through-themain» damper so the the claims. ' resistance to closing of. the pilot damper is greater With the present day electric thermostatic" than the resistance to turning of the main controlsithere islno‘ di?iculty' of any kind in; damper 26:.- on its axis 21. This pilot damper therefore opens ?rst and closeslast, in this way avoidinga ttoo- abrupt'opening or closing of‘ the maintaininga room: at a closely regulated de gree and ‘this is‘ still more‘ true'where the fuel: is-liquid'or gaseous. There'are, however,‘ many dwellings in. Which electrical-1y controlled devices cannot be used", and‘: still many others in- which the cost would: beprohibitive 'even. were the elec tricity available. The" present? regulator is draft. v ' 1 Theprincipal element of the chassis is'a chan nel membenthe‘welr of? which is bent at right. 30 angles at 31 to formva. vertical portion 38 and a adapted for: use with'either; acoal burning or a horizontal portion 39. The flanges 40 of this member‘ are necessarily severed near the bend 31. The: ba?le 38? forms one wall of .a vertical . ' passageway and the portion. 39? forms. the ?oor'of Figure 1 is 'a'central section through one form 35 a communicatinghorizontal passageway. ‘ Triang wood burning stove": 1 In'the drawings:- ofmy device; ‘ . v - ‘ - c gular stiffening elements‘ 41‘ not only strengthen ‘ Figure 2' is‘ a rear view with the rear panel of'the mirror ba?le removed. Figure 3 is a perspective illustrating a- portion 40 of the regulator with the casingremoved. Figure‘ 4i is a detail illustrating the knife edge bearing of the regulating 1ever. ' - Figure 5 shows the device‘ applied‘ to a coal‘ burning circulating heater. , the two arms of the channel member, but "like wise: afford means for supporting the upper plate Griuwhich is part of the casing although secured to the chassis;v . .. v ' ~v -. ‘ ' " Mounted on the-underside-of the web 39' cf the channel member is a relatively heavy steel plate 45 which extends rearwardiy‘ then downwardly and then slopes at an: angle of about 4¢5° from‘ the ‘Referring particularly to Figure l, the‘ stove 45 point 45'. As best s'e‘en‘in Figure‘ 4,>this. lliéga‘uge' illustrated is of the woo-d burning type, and is designated generally by the numeral. HI.v It has a sheet steel wall ll, a?anged b'a?‘le l2. and an. opening M of the. intake. of air. Secured around 50 this opening Mby bolts extending throughthe ba?ie is a casting‘ l6 which is usually especially > plate has a T-slot' atiits free end, the‘stem of‘the" slot bearing. the‘ numeral. 41' an d‘ the ‘longer’ reach of the slot being numbered 48. The regulating 4 lever 59' has a. T-head which ‘rests on the-sloping portion. of the plate: 45, thus forming-a pairL of knife edges‘ 51' which'rmaterially“adds to ‘the chi ciency and ease of, controlxoff the regulator‘ - To‘ made for the particular style of stove and‘ may the bottom of the lever-.iesecured a‘ strap 51?, be sold‘ with either, the stove or the" regulator: or carrying @a'tits lower end, the chain. 34. p both. The. major parts-of‘ .thewregulator- are the; 65 1 Referring; particularly to; Figure ' 3; two small - 2,406,088 4. 3 . r J 7 formed by engagement of the damper withthe lower. end of the strap 54. Under such circumj Zigzag bearing members 55 ‘are ‘secured'to the ?ange 48, of the horizontal web of the channel member and in these bearing-pieces is mounted a ‘ stances air enters through the large space 83 be 'pivot rod 56, endwise movement of which is pre-v vented by engagement with the ?anges 48. A quite heavy cam lever 68 is secured to the pivot rod 56and bears at the end 6| of its horizontal air thus flowsfrom right to left in Figure 1, un tween the edge of the draft tube, and the casing and also through the holes 12 in the casing. This der the open damper entering the stove through. the casting l6 and the opening [4. At the same time there is a slow movement of arm on a cam 82 secured to a vertical post 83 ‘passing through theweb' '39, the plate 45 and the top casing'member 44.7 This post 63, preferably 10 air ‘from between the re?ecting ba?le face 18 and’ j the wall II‘ of the stove and also inside of the ual knob 64 turning about a dial 65 which may, . .7 ba?le 11. The latter air passes in part through permanently attached to the cam, carries-aman the open end '8'! of the re?ecting ba?le, partly through the optional opening"!!! in top of the casing and partly from left to right, in Figure 1, be marked in arbitrary numerals andwith arrows‘ “ showing warmer in one direction and cooler in the v15 At its lower. free end the cam lever 68 is tapped’ as at 86 to receivethe threaded end of the thermo-, stat unit 28, preferably consisting of a pluralityrfj, other. > ,. V ' l ‘ between the web 39 and‘ the upper sheet 44 of the casing, thence downwardly inside of the rear wall 2| of the casing thus passing’ across the " ' large area of the wafers of the thermostat, heat of corrugated wafers and having a stud‘ 61 to en-v ing thelatter by this relatively warmer air, which afterwarming the thermostat passes into the gage a rounded elevation 68 on the regulating lee ver. - i Y ' '* I stove across the upper surface of the draft damper The major portion of the casing 2| is a single 28, being directed in this path by the great quan sheet bent like a square U,"thus forming the back tity of air passing to the stove from the bottom and the two sides of the regulator.‘ .The casing has a'plurality of horizontalslots or openings 18 25 opening 83,‘; this air mostly passingbelow th draft damper which is now horizontal.-. V somewhat above the center and has opposed ver; ‘ The passage of the small’ quantity of'warmed tical openings. ‘H above the draft damper when ’ air is. a very important feature asit makes the closed; and also'has a number of similar slots or thermostat far more sensitive to increase‘in the openings‘ 12 in the rearwall which‘, is otherwise closed. ' The openings "provide for entry‘ of air 30 stove temperature and'would check the ?re if ‘ the heat increased too fast, even though'the room 7 ,to the draft tube. Theopenings ‘l8 allow ,ventie were still cold? Radiant heat from‘the heated wall liof the stove passes through the optional The openings ‘H allow entry. of additional air and openings 88 in the web 38 and this helpspto heat primarily afford a view of the draft damper. The slots “in the top of‘ the casing are optional but 35 the thermostat. Theelement 98 is a‘light'alu minum ba?ie adapted to prevent the passage of are foundto be quite convenient in affording a this radiant heat when the damper is entirely more-surej?ow-of air under certain conditions. ' lation of an insulating space, later to be described. ._ A channel‘ shaped heat ba?le TI is secured to closed. - As the temperature of “the stove increases the. the ?anges 48 of the vertical web 38 of the chan nel member and also to‘the triangular'stiffening » _ thermostat expands. . Since the screw~carrying anchored end is ?xed in space by the‘positioning of the lever 68, such expansion of the thermostat The front wall ‘18 of this member is chromium plated soas to be heat re?ecting, while the inside of this sheet is of the normal dull ?n‘ ish of the steel‘sheet. A similar piece of chro ' pieces M. ' mium plated steel is attached centrally within the frame of the regulator, this consisting of an an‘ $8. causes-an increased pressure on the ridge'BB of the regulating'lever 58' which turns on itsknife edge bearings 51 and pulls on the chain 34. The angle of pull plus the weight'of the pilot 38 causes a movement of the entire mass pivoted at 21 in-; ‘ gular piece 88 spot welded or otherwise secured to the plate 45; Its re?ecting surfaces 8| and 82 provide a central ventilated insulating'space 85, cluding the counter-weight 83 and this movement continues as lOl'lg as the thermostat is expand the front wall of which is the web 38; the rear 50 ing; that is, ‘until such time as the main draft damper 26 is entirely closed. 'Ilhe pilot damper ‘ wall, the portion 82; and‘the bottom wall, the in‘- > is now fully open and an appreciable amount of . tegral portion 8| of the sheet 88. The two side further expansion of the thermostat is required I . Walls of thisspace are formed by the two par allel walls of the outer casing, but these are large: ly removed'in this area by the cutting of the slots 65 18 at both sides. The purpose of this space 85 'is to prevent heat from passing from the stove to the thermostat 28.. The re?ecting surface 18 like wise aids. in this feature, as does the webv 38. These several members are heated by the radiant heat'from the stove and were it not for this venj tilated insulating space 85 which cools the sur rounding metal, a much greater quantity of heat would be ' conducted through the metal ' to the thermostat. vI may heat insulate the thermostat from the cam lever‘ 68 by a small ?bre washer 84, but in practice do not ?ndthis necessary. ' ‘ The operation of the device is as follows: > The knob 84 ‘is moved to select the chosen heat to be maintained, which action it will be. noted raises or lowers the upper end 6! of the lever 68 with consequent increased movement of the anchoredv end of the thermostat. Assuming the before the increased pull on the chain 34' closes this'pilot damper 38; This is an important fea ture as it bars all possible sudden cessation of the draft and causes the ?re to ease down,which is particularlyimportant with fuel having a high volatile content. ' ' ‘ ' ‘ When the heat requirements have thus been - met, thereis no‘movement of air from left to. right in the upper air passageway of the regula-~ tor,that is, between the .web 38 and the top wall 44, such heat as may rise passing freely through the openings 14 and 81. There is, how .ever, a movement of room temperature air from the bottom opening 83 upwardly'past the thermo-. - statand from right to left in the upper hori zontal space above the channel member. _ Since the metal of the regulator is slightly warmer than the'room temperature, this current of air passes‘ out, through the openings. 14 and 81. As the dampers 2'6 and 38 are now entirely closed, they room to be. colder than desired, the main damper also are at a temperature above that of the room. ’ 26 is wide open, that ishorizontal, the stop being " _Air_follows the heated slopingsurface‘ of this 2,406,088 5 metal and passes out through the opening 81 through the two or more holes 88 in the channel member. The thermostat 20 is quite near the opening 83 so it is bathed almost exclusively in air at the temperature of the roomand radiation of heat from the stove is blocked by the re?ect to room temperaure almost exclusively when the heat requirements of the room are substantially met. 3. The device of claim 2 in which the air pas sage includes three parallel ba?les between the thermostat and the space heater at least one of ing surface 18, the vertical wall of the ?anged channel member l9, the ventilated insulating the walls being of a re?ecting surface. 4. In a, draft regulator for space heaters of the space 85 and the re?ecting surface 82. type burning solid fuel, a damper for controlling the admission of air to the stove, walls forming As a con sequence, the thermostat at such times is sub stantially exclusively under control by the room air and responds very quickly to any change in temperature. It will be noted that the bosses 90 provide an air space between the casing and the draft tube and chassis, also that the sheet 80 makes a fairlysnug ?t with the casing, being wider than the channel member l9. When used with a coal burning stove as in‘ a vertical passageway conducting heated air from the stove upwardly, walls forming a second ver tical passageway, a thermostat within said'sec~ 0nd passageway and operatively connected to the damper to increase or diminish the ?ow of air to " the stove, a horizontal air passageway communi cating with said two passageways, and means cooperating with the walls to form a ventilated Figure 5, the regulator is secured to the ash pit air space between said vertical passageways and ' 86 by an appropriate casting 89. The slot 9| in 20 below said horizontal passageway located at sub-' the mirror baf?e 11 is provided to receive the stantially the elevation of the thermostat, said casing 192 of the circulating heater so as to posi air space serving to cool the walls of the passage tion this baffle in the space between the stove ways to a temperature only slightly above that V and its light metal casing. \The operation of ‘ of the room. the regulator when used with a circulating heater 25 5., In a regulator for a solid fuel burning is substantially the same as has previously been heater, a damper for controlling the admission described. of main combustion air to the heater, a thermo What I claim is: stat operating said damper, and a series of walls 1. In a draftregulator for solid fuel burning ' between the heater and the thermostat for shield space heaters, a horizontal draft tube, a draft 30 ing the thermostat from radiant heat from the damper controlling the ?ow of air therethrough heater, said walls providing a portion of the to the heater, a vertical baffle-above the draft boundary of an air passageway, alternately di-, tube, a re?ector cooperating with the vertical recting room temperature air and heater warmed Fba?ie to form a vertical passageway adjacent the heater, walls forming a second vertical air pas air to the thermostat as the damper is opened and closed, a plurality of said walls having heat sage spaced from the previously mentioned pas re?ecting surfaces facing in the direction of the sageway, walls forming a horizontal air passage heater. ' communicating with the upper ends of the two 6. The device of claim 5 in which at least one vertical passageways, a thermostat within the of said walls is a wall of a ventilated heat insu second‘ passageway, and a sloping wall directing 40 lating space substantially at the level of the thermostat. ' heated air from the spaced passage to a point just above the draft tube, whereby when the '7. In a regulator for a heater, a metal frame damper is open heated air will pass upwardly work, a thermostat adjustably carried by said between the ba?ie and the re?ector and thence framework, means controlled by the thermostat‘ downwardly past the thermostat, thus making 45 for regulating the heater, a casing surrounding the thermostat more responsive to changes in the framework on three sides, and projections on said frame-work for holding the casing in spaced the heater temperature when the damper is open relation to the frame-work in order to provide and the room is cool than it would be if the an insulating air space between the casing and heated air were not thus circulated. 2. In a regulator for a solid fuel burning space 50 the frame-work, whereby to shield the thermo stat from heat from said heater passing through heater, walls forming a heat insulating space the casing walls. ventilated to the room to be heated, additional walls cooperating with said walls to form an air 8. In a heat regulator for a room heating stove, passage completely encircling said space and a pair of vertical walls, a sloping wall joining said having a hot air entrance, a hot air exit near the ' walls to form three sides of a heat insulating heater and a room air inlet further from the space of which the sloping wall is the bottom, a heater, a thermostat in said passage above the thermostat mounted adjacent one of said vertical room air inlet, adjacent said heat insulating space and distant from the hot air outlet, and means governed by the thermostat for control ling the flow of combustion air to the heater from said room air inlet whereby when said means nearly shuts o? air to the heater, a flow of cold air will be induced in said air passage from the room air inlet past the thermostat to the hot air outlet, thereby making the thermostat responsive walls, means controlled by said thermostat for regulating the stove, and means including said sloping wall for directing air heated by the stove = downwardly past the thermostat and toward the vertical wall further from the thermostat, said heat insulating space being open to room tem perature and located between the stove and. the thermostat. PERRY S. MARTIN.