US1698551A - Furnace regulator - Google Patents

Description

Jan. 8; 1929.

T. LONG FURNACE REGULATOR Filed May 12', 1927 (y 34 jug. i. 31 I 3' 3:0 I 1 g IN.VENTOR ATTORNEY rvbearingfor the actuating lever.

' with a furnace Patented Jan. 8, 1929.

THOMAS none, or scorn BEND; INDIAN i I 2 unniest; Q REGULATO Ba v Application filed May 12,

This invention relates'to improvements in v furnace regulators,and the objects' thereof; are v to provide automatic means for operating the draft andcheck dampers of a" fur-' nace and thereby'regulate the fire therein;

and to provide in connection with the automatic regulating means a device controlled by the coal door wherebysaid dampers are automatically closed upon opening coal door. Another object is to provide means for adjusting said" automatic means from a pointremote from the furnace.

, These'objects are accomplished by the construction illustrated in the accompanying drawings in which I Fig.1 is a diagrammati'cal view of {the invention appliedto a furnace of ordinary construction, theview being aside elevationthereof ;v

' Fig. 2 is a similar view showing-afront' elevation ofjthes I Fig. '3 is aside elevation of'a thermostatic rppliance formingfpa-rt of" the invention, parts being broken away; V I Fig. 4 is a fragmentary plan view of' the' structure shown in Fig; 3, a portion being in section; V

Fig. 5 is a front elevation of an actuating lever for the thermostatg' and Fig. 6 is a perspective view of afulcrum The characters appear'ng i the" descriptiO H; refer to parts shown in the drawings and designated thereon by 'jcorr'esponding The invention comprises in -combination 1 which is provided with a coal door2,"a Fdra ft damper 3 andfits ashdoor it and a check damper 5'lin its smoke pipefi, and althermostatic' meansflhaving connections "with said dampersgfor their op- V Th,e thermostat consists io'f an gezgpansion member 7, preferablyin theg foringof, a tube, the tube 1 being positioned in the dome '8' of the furnace; there being afix'ture 9lon' the I forward part of the tube for securing itin place. On the front end of ithe 'tube which jpr ')trud e's from the fixture, is; mounted'a housing 10, the vforward endv of which is curved and has a vertical'disposed opening 11 therein, the bottom of said .housing also having an opening 12 therein. oscillating inembe l3eXtends through the sidewalls 14: and 15 of the housing in which it is sup ported, and has a fixedeccentric 16 thereon earan of the tilting 19,27. Serial no. 190,715.

17 providedwith a weight 18 at itsouter v end, by, which arm the eccentricis adjustably 1 turned upon the axis of'the oscillating member accordingly as'said arm is r'nolvedfij"An.

having" a bifurcated'head- 20 is mounted upon said eccentric, whichfec centric extends laterally through said head, and which lever extends through-thejop'e'n-i ing 12- in"the housing. 1 A rod" 21 extends actuating lever 19 longitudinally through the expansion mem "v ber'7; which rod is composed of metalthat' is less susceptible toexpansion when heated thanthe expansion tube 7; the rear-end of; the rod being-secured to the corresponding endof the tube 7 by a plug 22 in which the rod is threaded. The forward end of'the.

rod projects through the head 20 of th'eac tuatin lever -=andhas adjusta bly{secured thereoh a fulcrum block 23, vvhich block has wedge shaped bearings 24 that bear *res e'c tively in correspondingnotches 25in the front of said head, there being a nut-26 on said rod for adjusting saidblocki On the forward end of the rod 21 is adjustablyse cured a bracket 27 upon which is'pivotally mounted an indicator names thatprotrudes through the slotlljand has a bent finger 28" of the housing. Said hand has" an upwardly extending "lotted" arm 29 that is engaged by a "stationary pin wardly from the top of the housing and e'xj tends loosely through the slot" in said arm, so thatwhen said 1'0Cl'21 l$ moved'lo'ngitudi that'overlaps the curved front face- 30 that projects downy fall? through the io o he, pansion a member 7 the hand 2 8'is caused to turn up on its pivot more or less accordingly. Like wise the actuating lever 19 is caused to mrn upon the eccentric 16 through themediur'n of the rulcmm block and the rod 21thro'ugh the I action'by the expansion member. v Positioned above th floor isa standard 31 upon which is pivotally mounted an adjust- 'ing'lever 32 that is connected with the weight 18 on the adjusting arm 17 by meansfoff a cable 33, there being a sector 34 on the standa ard for securing the lever 32 in adjusted positions. Beneath the floor '30 is secured a han er 35in which is p ivotally 'supported'a bar 36, one end of which supports a and'th'egopp'osite endof "which is connected with the latch 38'on the Ic'oal,v door 2' by. means of a chain 39.] The hanger 35 is so located relative to the coalswivel pulley 37,

door that when the door isopened, the tilting bar is permitted to tilt so that the pulley 37 is lowered thereby.

An idler 40 is supported by a post 41' beneath the floor at a point above the check damper 5, and a cable 42-42 is connected at one end with said check damper and is strung over the idler and pulley 37 accordingly.

its opposite end being secured to an arm 43 that projects from the side of the draft damper 3. The cable 42 has alsoadjustable connection with the actuating lever 19 at the outer-end thereof, and is of such length that normally when the check damper 5'is closed, the draft damper 3 will be held ajar, or, as the draft damper 3 is closed, the i 'by to the rod 21 so that the actuating lever 19 is swung upon the eccentric 1 6, and the cable 42 attached thereto is 1 vpulled downwardly, permitting the draft damper 3 to close and causing the check damper to open.- In this manner combustion of fuel in the furnace is retarded when the heat in the dome becomes excessive. WVhen the temperature in the dome recedes the tube 7 consequently contracts so that the rod 21 moves forwardly permitting movement of the lever 19 in the opposite directionfrom that in the previous instant, thus causing the draft damper 3 to open and the check damper 5 to close. I

When the coal door 2 is swungopen, the bar 36 is relieved, permitting the lever 19 to tilt and lower the pulley 37, causing the cable'42 to slacken, which permits both the 7 draft damper 3 and check damper 5' to close. 1 In this manner when fuel is being supplied expansion of the tube 7.

to the furnace through its coal door, the

' suction of the draft in thesmoke pipe causes an inrush' of air through the coal door which preventstheemission of smoke and fumes from the firebox into the furnace room.

close is somewhatgrea-ter than that of the draft damper, which is duetoplacing the connection of the cable l2 with the check damper closer to its hinge than the connection of the opposite end 42' of the cable with the draft damper. Or, the check damper may be weighted so as to overbalance the A draft damper In this manner, the

tendency is for the check damper to close and the draft damper to open opposed to the By raising or lowering the adjusting lever 32, the adjusting arm 17 is raised or lowered and the eccentric 16 is thereby adjusted and the poise of the lever lf) is altered so that the dampers 3 and 5 controlled by the cable 4242' which is attached to the actuating lever will be influenced accordingly at an earlier or later stage in the expansion of the tube 7. Thus, by positioning the adjusting lever 32 the dampers may be initially set so that the combustion in the furnace will be maintained at the desired rate, and by adjusting the bracket 27 properly on the rod 21, the indicator hand 28 may be set so that its finger 28, by its movement over the curved face of the housing, will indicate the t a tric influenced by said thermostatic means;

an indicating member influenced by said thermostatic means; a t1-lt1ng member including a pivoted bar and pulley supported on one end thereof ;,a connection between the other end of said bar and the coal door of said furnace wherebysaid bar is relieved when said door is opened so, as .to lower said pulley; and a cable extending over said pulley, one end of saidwcable havingconnection with said check damper and the other end thereof having connection with said draft damper and being movable so that normally when the check damper is'closed the draft damper will be opened, and vice versa, said actuating lever having operative relation with said cable.

2. In combination with a furnace provided with a coal. door, draft damper and a check damper, a thermostatic meansin connection with said furnace; an oscillating member in 7 H v with said arm; an actuating lever on said -The tendency of the check damper 5 to eccentric influenced by said thermostatic means; a tilting member including a pivoted bar and pulley supported on one end thereof; a connection between the other end of said bar and the coal door of said furnace whereby said bar is relieved when said door is opened so as to lower said pulley; and a cable extending over saidjpulley, one end of said cablehaving connection with said check damper and the other end thereof having connection with said draft damper and being movable so that normally when the check damper is closed the draft damper will be opened, and vice versa, said actuating lever having operative relation with said cable."

3. In combination with afumaceprovided with a coal door, draft damper and a check M u-qu opened so as to lower said pulley;

ing a pulley supported thereby;

damper, a thermostatic means in connection with said furnace; an Oscillating member including an eccentric thereon and an adjusting arm therefor; an actuating lever on said eccentric influenced by said thermostatic means; a. tilting member including a pivoted bar and pulleysupported on one end thereof; aconnection between the other end of said bar and the coal door of said furnace whereby said bar is relieved when said door is and a cable extending over said pulley, one end of said cable having connection with said check damper and the other end thereof having l connection with said draft damper and being movable so that normally when the check damper is closed the draft damper will be opened, and vice versa, said actuating lever having operative relation wit-h said cable.

4. In combination with a furnace having a coal door including a draft damper and check damper, a thermostatic means in connection with said furnace; an adjusting member; an actuating lever supported by said adjusting member influenced by said thermostatic means; a tilting member includa cable extending over said pulley and connecting said check damper and draft damper and being movable so that normally when the check damper is closed the draft damper will be opened; and vice versa, and an operable connection between said coal door and tilting member whereby said cable is slackened when said coal door is opened and both the draft damper and check damper are thereby closed. I

5. In combination with a furnace having a coal door including a draft damper and check damper, a thermostatic means in connection with said furnace; an actuating lever,

influenced by said thermostatic means; a tilting member including a pulley supported thereby; a cable extending over said pulley and connecting said check damper and drafts damper and being movable so that normally and both the draft damper and check damper are thereby closed.

6. In an appliance for controlling the draft damper and check damper of a furnace, a pivotally supported lever member including a pulley at one end thereof; a cable connecting said draft damper and check damper and extending over said pulley; a second cable connecting the other end of'said lever and the coal door of the furnace where y controlled mechanism influenced by the heat generated within the furnace, which mechanism has actuating relation with the first cluding-a pulley at one end thereof; a cable connecting said draft damper and check damper and extending over said pulley; and a second cable connecting the other end of said lever and the coal door of the furnace I whereby said lever is actuatedwhen the coal door is opened or closed;

In testimony whereof I afiix my signature.

THOMAS LONG.-

said lever is actuated when the'coal door i I is opened or closed; and a thermostatically v

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