US1428516A - Furnace control mechanism - Google Patents

Description

C-' R. ABBOTT.

FURNACE CONTROL MECHANISM. APPLICATION men AUG. 1. 1921.

1,428,516; PatentedSe t.12,1922..

A TTORNEYS.

Patented Sept. 12, 1922.

n STATES CHRISTOPHEB. narrow,

or AnnnnsoN, INDIANA.

. runnacn conrnon MECHANISM.

I [Application filed August 1,

To ,allrphomjt may concern; V I Be itknown that I, Cirnrsrorigrnn R. AB BoTT, acitizen ofthe United States, and a resident of Anderson, .county of Madison, and State of Indiana, haveinvented a cer tain new and usefulFnrnace Control Mecha nism; and Iv do hereby declare that the following is aiull', clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts. 1 I 5 This invention relates to furnace control mechanism and the chief object thereof is to provide simple and positive means for controlling the check anddraft controlsof a furnace. H The features of the invention are such as will accomplish allot thefl foregoing objects. The full nature of the invention will be understood fromthe accompanying (drawings and, the] following description and claims. 1 i

.In the drawings, Fig. 1 is an elevational View of a furnace with theinvention associated therewith, "Fig. 2' isatop planviow of the invention; ,Fig.,3,is.a side velevational view of the invention. Fig; 1 is a sectional viewtaken on line; of Fig. 2.

"In the drawings 101'ndicates'a heating device or, furnace,that herein'illustrated being ofthehot water type, andfsaid furnacefor heating device is provided with, the usual draft 1l, closed a hinged plate and a smoke pipe 13'controlled byacheck valve 1 1. Herein the particular type. of mecha nism associated with the draft and check means or controls', is a;rock shaft 15 movable by. a ,counte'rweightedf reverie associated with ,which, is the counterweight, 17. I The lever isflalsoassociated through the, rod or cable .17 f with; {the draft valve "or plate 1 2. This control mechanism iis fold inthe art and forms no part of the invention, andv the particular type herein .illustratedf such that the control is automaticp tliat is, that the furnace is provided. withmeanssuch that as the steam pressure increasesbeyond aprede termined pressure, "the counterwei hted lever closes the: draft and opens the' c eck, and when the pressure ofthe steam heating system decreases, ,thes e mechanism is adapted to open thel idraft and close 1 the 19 21. Serial no. 488,907.

check, thereby maintaining a uniform condition. This feature is temperature operable, as well as pressure operable, and in the latter instance would be thermostatically controlled.

v.Heretofore it hasbeen the custom when the automatic control is to be rendered inoperative, such as during the night when the fire is to be checked, suitable means has been provided for locking the lever 16,so that the same will not be movable by the counterweight 17 and the controlling means heretofore, described. Also it has been the custom to disconnect the cable means 17 from said lever, thereby insuring that the draft will not be opened. In the present invention one endof the lever 16 is connected to a cable or chain 20 which is associated with suitable pulley means 21 and terminates in a ring 22. The full and dotted line positions in Fig. 1 illustrate the respective positions of the check and draft valves and the main controlling lever 16. Thus, when the parts are inthe full line position as shown, the check is open and the draft closed; while in theif suitable means is provided to hold the chain or cable 20 in its full lineposition, the fire in the furnace will be checked, and that when the cable means 20 is released, the draft will be opened. Means is provided for maintaining the cable 20 in its latched position and releasing the same at the desired time, and is illustrated in detail in Figs. 2, 3 and 4.. In said figures,"25- indicates a basememher, whichcarries at one end a bracket 26 which is slottedas at 27, and extending throu slot 2% are thealigned openings 28. The slot 27, as shown clearly in Figs. 1, and 3, is adapted .;to receive, the ring 22. A suitable bolt member 29 slidably supported in the aligned-openings 28 is adapted to maintain upon or lock the ring to the bracket. The opposite end of the bolt 29 is likewise slidably supported in a bracket 30 secured to the base plate 25. Thebracket 30 has an opening. 31 inalignment with the aligned openings 28. Concentric withthe bolt 29 is a coiled spring .32 which bears at one end saidbracketandtransversely of the against the brack'e't 26 andat the other end I comprises a lever 34 which is hingedly sup-.

ported at 35 upon the base plate 25,'and said lever, as shown clearly in Figs. 2 and 4,

straddles the bolt 29 and bears against the collar 33. Y

The means for latching the bolt'29 comprises a catch member 36which "is pivotally supported at 37. One end of said catch member, which is essentially a lever, is provided with a counterweight 38 for maintaining said lever in the position shown in Fig. 4, whereby the bolt 29 is secured in the position shown in Figs. 2 and3. A suitable extension 39 of the bracket 30 carries a guide member 40 which limits the transverse move ment of the lever 36, but permits itsrocking movement onthe pivot 37 in a'plane perpendicular to the movement of the bolt 29. The other end of the lever 36 or latching member is provided with a tripping portion herein shown in the form of a padded plate 41. Suitably supported on the extension42, which provides a pivotal support forthe lever 36, is an overhanging portion 43 which carries an-adjusting member 44 which may be locked inadjusted position by a lock nut 45. The adjusting member 44 v is herein shown in the form of a bolt whichengages a transversely extending portion 46 on s the lever 36, and it is by the aforesaid means that the normal position of'the lever 36 is adjusted. Also positioned upon the base member 25 is a supporting plate50 which terminates in an extension 51 substantially parallel to the lever 36. The extension "51 comprises a circular portion 52 and a wing portion 53. A suitable'clock 54 is provided with a dial 55, theusual alarm dial 56 with the several hands 57 ,the winding devices 58 and the setting devices 59. Saidclock carries a complementarily formed socket member 60, andsaid member is key-hole shaped to receive the ciroularand wing portion of the supporting bracket 50. The base member 25 is herein shown provided'with a slot 61 so that the extension "51 does not project very far beyond the base 25. Theclock 54 is provided with the usual alarm hammer 62 which usually is adapted to strike the alarm bell, but in the present instance is positioned adjacent tothe plate 41 and is adapted to strike the same, thereby tripping the lever 36011 its pivot 37 in opposition to the weight 38 to permit the bolt 29 to be projected by means of the spring 28 into such position that the ring 22 will be released from the bracket 26, thus permitting the weight 17, see Fig. 1, to become operative to actuate the lever and thereby open the draft 12 and close the check 14.

The invention claimed-is; v

1. In a clock controlled device,the com bination of a clock, yieldingly mounted releasable means, latchingmechanism therefor and releasable by said clock, a Weight for maintaining-said latching mechanism in the latching position, and means for adjusting :the latching position of said latching mechanism.

2. A releasing mechanism in combination with a cable normally under tension and a retainin member therefor,including a bearing brac ket having aslot 'therein' communieating with and extending"transversely o f said bearing, for receiving said retaining member, a bolt slidably supported in said bearing bracket and having an end adapted to bridge said slot for-retaining said retaining member and'said "cable and means for sliding said bolt to remove the's'ame from the slot and" releasing said member and'said cable fromthete'nsion.

3. A releasin me'sch'an'ismincluding a plurality of bearing brackets, one end bracket having a slot therein communicating with'and extending transverselyof the bearing, a bolt slidablysupported"insaid bearing brackets and having an'end adapted to bridge saidslot forretaining purposes, retaining means adj acent'theother end bra-cket for retaining the bolt in the bridging position, and yielding means for sliding the bolt from the bridging position when the retaining means is actuated.

4. A releasingimechanism' including a plurality of bearing brackets, one 'end bracket having a-slot therein communicating with and'extending transversely of the bearing, a bolt slidably supported in said bearing brackets and having an end adapted to bridge said slot for retaining purposes, retaining means adjacent the other end bracket for retaining the bolt inthe bridging positiomanabutment rigid with said bolt, a coiled .springfhaving one end bearing on'said abutment and the other end sta'tion'arily secured, and a movab'ly mounted resetting member for engaging the opposite side of the abutment for returning said bolt to the bridging positionin opposition to said spring.

5. A releasing mechanism including a plurality of bearing brackets, one end bracket having a slot therein communicating with and extending transversely of the bearing, a bolt s'lidably supported in said bearing" brackets and having-an end a dapted to bridge said slot for retaining purposes, retaining means adjacent the other'end'bracket forretaining the boltin the bridgin position, an abutment rigid with said 0a, a

coiled spring having one end bearing on said abutment and the other end stationarily secured, a movably mounted resetting member for engaging the opposite side of the abutment for returing said bolt to the bridging position in opposition to said spring, and means associated with the retainig means for automatically returning said retaining means to the retaining position simultaneously with the return of the bolt to the bridging posi- 10 tion.

In witness whereof, I have hereunto aflixed my signature.

CHRISTOPHER R. ABBOTT.

Images