US931815A - Raking mechanism for furnaces. - Google Patents

Description

A. TUCKER. RAKING MEGHANISM FOR FURNACES.

lGPLIGAI'ION FILED MAY 21. 1908.

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A. TUCKER.

Y RAKING MEGHANISM FOR PURNAGES. y APPLIOATION FILED MAY `21, 1908. 931,81 5".l 1 Patented Aug. 24. 1909.

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A. TUCKER.

RAKING MECHANSM FOR FURNACES.

APPLICATION ILBD MAY 21. 1908.

Patented Aug. 24, 1909y g 2,9.g I, .7

A. TUCKER. RAKING MEGHNISM POE PURNAGES.

APPLIMUON HLBD MAY 21.1908.

931,81 5. Patend Aug. 24, 1909.

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ALLEN TUcKEmoE MINERAL' PorNT, WrscoNsiN, AssrsNcR 'ro THE NEW JERSEY ZINC con'- f AraNrncE NEWARK, NEW JERSEY, A CORPORATION or NEW JERSEY.'

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Be it that 1, ALLEN Tuciruma resident of Mineral Point, in .the county of Iowa and State of .Wisconsin, have invented c erjv 'tainl. new v...and useful Improvements vin the.fol

Mechanism for Furnaces, of which owing is a full, clear, 'and complete disclosure. 4 1

This invention relates to furnaces in which a rake is reciprocated for the purpose of stirring the contents of the furnace, land is particularly applicable yto that class of furnacesinwhich ore is roasted, suchaszinc and other ores'.` L'

The inventidn resides in mechanism for o erating the rake's of such' furnaces so that t e fr novement of the same always be under easy and immediate "control, and

era-te such furnaces is. reduced.

i whereby the number of men necessaryto .op-

Further advantages' and yiniprovements will' be hereinafter pointed out inthe followy specification' andclaims:

For a full, clear and detail description of one form of my invention, `reference may be had to the' following specification and to the accom anving 'drawings forming a part" Figure lis a side elevation of the mecham ism forl operating the rakes, and'also showing the ore roastingfurnace in vertical -section. Fig". 2 is. an end elevation of the furnace showingthe turn-table for transferring the rakes from one tier of roasting ovens to an- 3.5

other, and showing ythe platforms for the operator located adjacent thereto. Fig. 13 is a side elevation of the platforms onwhichl the operator stands, and also showing the Fig'. 4 isa plan; view of the rake operating'- mechanism, showing the means for transmitting power thereto'.l Fig. 5 is a diagram matic'view of a turn-ftable at one end of the furnace, and `on which are located the controller handlesfor controlling the rake op-'v ings, 10, through which the ore may he Application sied nay'zrisos. serial No. 434,065.

i :Specification Letters -Patent. P.ailtd Aug'. 1969i passed fromone oven to the next lower oven in the same tier. vThe lower ovens or mufes are separated by fire flues, 1.1, through which may pass. It is to be understood, however, that I' do lnot desire to be'limited to this par'- ticularform of furnace, as the bottom of the combustible gases for heating the .ore

one side thereof, sothat when the shaft-.12 Vis rotated-at 180 degrees, the-platfo'rr'nlmay be' brought opposite either of the two tiers of ovens shown. These platformsare preferably providedwith guides, 14, shown in Fi' s. 2 and-4, and also with anti-friction .rol ers, 15. The rake, 16, is slightly nar` rower than the distance betweenthe guides 14, and is constructed in any preferred4 `or .well known form, and operates to evitate or stir the ore in the oven in the wel .knowIr way. This rake preferably consists of a rec tangular frame-having triangular cross-bars and vertical bars or projections for moving the'orelaterally, The rake, 16, is Valso pro-4 vided withtwo sets of angularly arranged rods, 17, tol which the draw rods maybe connected. The draw rods, 1 8, are set 1n pairs opposite each tier of ovens or muliies,- a nd vare preferably operated by endless. chains,V

19, to which` they are attached at their 'outer ends. The draw rods, 18, are provided with hooks or similar devices, 20, lat their 'inner ends by which they'lmay be attached to the respective r'ods, 17, of the rakes, y16. Power is communicated to the sprocket chains, 19,`by means of sprocket wheels, 21,

fixed on transverse shafts, 22. v The inner',

ends'of these shafts, 22, are rprovidedwith bevel gears, 23, which mesh-with corresponding bevel gears, 24, fixed on a vertical shaft, ivo

25. These bevel gears 23 are so mounted on the shafts, 22, that they may b'e thrown and outof mesh with the' gears,' 24, by a.

mechanism hereinafter to be described. vThe shaft A25 also carries a bevel gear, 26, which meshes'with 'the 'bevel gear, 27, iiXedfvto 'a shaft, 28,- which may be driven in any suitf able waysruch as by any;r well known connection with an electric motor, 29.

Adjacent each end of the furnace, and at each side of the turn-tableof `platforms 13,'

with a transverse horizontal shaft, 33, bymeans of b'evel gears or similar devices, 34.'

The shaft, 33, is connected-'with a controller; 35, which controls' themotor 'connected 'with themaindriving shaft for the rake operatmg mechanism.v f This controller is preferablyT constructed so that a movement of the controller handle in one direction from a median position will give one movement, saya forward movement, to the draw rods, while Aa movement of 'the controller 'handle in the opposite direction `from 7the median position will give a reverse or backward move'V ment. Y Instead of locating the controller handles on the fixed platforms on lwhich the operators stand, the controller handles and the shafts on which .they lare 'mounted' may be attached to the 'turn-table for .transferring the rakesfrom'one tier of ovens to theothen This modification lis clearly Aillustrated in Figs. 5'and.6. In' this arrangement' of the apparatus, each platform, or stage. of the turn-table '13is provided with a bracket, 36, on which .the vertical shaft137, is carried. The -controller handles, 3.8, are -attached .to this shaft and operate to revolve the shaft 37 by the turn-table, to start, stop or reverse the motor, 40, for reciprocating the rake bars, 18. -In this formof the apparatus, the

-leads of the' motor are connected with the -controller by suitable contact rings', 41., and contact strips, 42, the number of such rings and strips, of course, depending upon the number of leads required.

It will be apparent that-any number of draw rods may be operated' independently or simultaneously, draw rod may be operated independently of the others at the end -of the furnace, I provide means', for*v throwing the 'driving mechanism forthe draw rods into and out of' operative connection therewith. For this purpose t e gears, 23, are slidably mounted upon the shafts, 22, being sphned thereto, so that the power fromthe shaft'22 will be communicated to .the gears 23, while at the 'same time they are free .to move longitudinally on said shaft. For the purpose of moving the gears 23 longitudinally on the vshafts 22 'are' .provided rotatably and longie5 tudinally movablesleeves, 43, which, when so as to cause the controller, 3,9, also carriedv yand in order .that onevosc'illated or rotated, nillhave 'a correspond# ing longitudinal. movelnent'such as bythe use of a well-known pin and spiral slot op` erating in connection .With'the ,support or bearings,*44. The sleeves 43 are rotatedA .7o by means 'ofY radially projecting levers 45. Eachof. theselevers 45 is .connected tothe ends of a pair of-ropes or cords, .46 and 47, which are carried 'by suitablesheaves supported on the framework of the'a paratus., andthe ropes are so located' that t eir ends terminate'adjacent the'respective )latforms, 30, on which the'operator stands, and fit should be noted' that the ends ofthe ropes or cords for moving the transmission gears longitudinally extend to those platforms which correspond to the height' of a particular rake 4,barfto be operated. These cords-or ropes', 46 and' 47 .are preferably provided with counter weights', 48,' which not onlykeep the said-cords taut, but' also tend to counter.- balance the Weight of the partsin operating `the transmission gears.- The detailsi'of operation of my improved mechanism Will'be apparent from the abovel description, but it may be said .that when in use the 'turn-table, 13, is located opposite one verticaltierofovens, and su Aposlngtlic ore -to have been distributed tlirough -the different. ovens or..mufIies of the furnace, after having been insertedthrough the first opening, 9, the first rake ofthe correspond'- ing oven, 2,'is .drawn through 'the sai'd'oven from one 'end to the -otherfsay from the 'left handtoward the'right, where it is then alf vloo lowedto 'remain on the turn-table at-that end of thefurnace. The next lower oven is raked in a similar manncr, but in the opposite direction, and sd until all'thc rakcs have' -b'een transferred to the turn-tables at the loa4 opposite ends of the' apparatus.f Both turn.- table's are then rotated 1S() degrees',thereby vbringing the Takes' o )posite theother tier of ovens or muffles. i`he same;operation'- is- 'then repeated, except that the rakes .are 110 drawn' through the ovens 'inthe reverse -directiolnfuntil they 'are 4all. 'deposited on the turn-tables from which the ,started The turnetables are then rotate( back to their original position 'and the cycle isthen 115 complete.

tvfill be obvio'us that the respectivedrav: rods are thrown into andout of operation-by 'pulling upon the ends o'f the respective cords, and 47, while their movements for- Ward .or backward Vare legulatedby means of the controller l1andles, 31,.

From the above description, it -will be seen that -l nt only produce: an exceedingly simple and easily o erated mechanism for reciprocating the ra es in furnaces, of the class described, whereby'the rakcs are at all times under 4complete and instant control, whereby the rakesmay be easily and quickly transferred from lone tier of ovens to an- 130 other, but also A'the arrangement described reduces the number ofl attendants necessary to efficiently maintain the action of the fur- I naces, since it is possible for one man at each end of a single furnace comprising two A vertical tiers of ovens, to'keep the furnace V1n continuous operation. Heretofore, itghas been necessary to employ two men at each end of the furnace, ,one man having charge of attachlng and detachlng the rakes to the dran' rods, while theother man has had. to. give his entire attention to the mechanism for reciprocating the rods. v j- Having thus described these forms of my invention, I do not Wish to 4be understood as being iim'itedto the exactvdetails of construction and arrangement of parts 'shown and devscribed-for obvious variations will occur to' persons skilled-in thenm, and which may be embodied in the apparatus Without depart'- ing from the spirit and scope of my invention. For instance,l the platforms, 30, for

Y theoperators, instead of being fixed, may have substituted vertically moving plat- 'fc`r table n .and adapted to`move nito posltion opposlte the end of each tier, and having she ves located on alcvel with each oven, operators platforms located .adjacent said transfer tables at the end of each tier of ovens, a series of rakes adapted to pass through both tiers of ovens, mechanism' for reciprocating said rakes, and controlling mechanism for said reciprocating mechanism having their ends located at said operators. platforms.

2. The combination with a. furnace having two tiers of ovens, a turntable located at each end of the furnace, and pivoteg'l centrally between the tiers so as to move into posltlon opposite the end of each tier, shelves carried j by said turntable on a level with each oven,

I operators" latforms located at each side of said turnta le adjacent the ends of each tier of ovens, a .series 'of rakes adapted to pass re'e-iprocating said rakes, controlling means for startmg and stopping sald mechanlsm, means for controlling the dnectlon of motlon terminating at `said operators platforms.

3. The combination with a furnace having a plurality of tiers of ovens of devices operat# ing within said `ovens and adapted to pass through thesame, transfer tables at each end of said'furnace, o erators platforms located adj acent'said tables, means for reciprocating at the ends of said ovens, means for reciprocatlng said rods, a source of power, means Vfor connectlng and dlsconnectlng sald source comprising slidable gears, means-for moving said gears longitudinally on their respective shafts and operating cords attached to said sliding means andhavingttheir ends-located adjacent the respective operators platforms. '4. .The combinationlwith a furnace having a plurality of tiers of ovens, of devices operating Within 'said ovens and adapted to pass through the same, means for Vreciprocating rods located longitudinally of and adjacent the ends of said ovens, endless chains attached to said rods, sprocket Wheels for driving said chains, shafts carrying said sprocket wheels, transmission gears slidably mounted operating parts connected with sa'id sliding means and having their ends located adj acent the ends of the furnace for operating ing shaft ada ted to be connected with each of said slidabli: ears, and means for'rotating said driving shaft 1n either direction.

Signed this 14th day of May, 1908.

ALLEN TUCKER.

l' llitnesses: W. R.- SMITH,

l FRANK E. HANSCOM.

thereof, said controlling' means having ends` through both tiers ofovens, mechanism for l vsaid d evice Within said ovens, said means comprlsin-g rods located longitudlnall'y of and of power with each of said rods, said means said devices Within said ovens, comprising on s'aidshafts, means for sliding said gears,

said sliding -means for said gears, a main driv-

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