US876440A - Drying-cylinder. - Google Patents

Description

YPATENTED JAN. 14, 1908.

w. M. GUMMER. DRYING CYLINDER.

APPLICATION FILED APR. 29. 1907.

INYENTOR BYJMWWTTW.

AITEST 6 14751244, @EW

- WILLIAM M. OUMMER, OF CLEVELAND, OHIO.

DRYING-CYLINDER. g

No. area so.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed April 29. 1907- Serial No. 370.804.

Be it known that I',- W1LLIAM M. CUMMEOIR, a citizen of the United States, residing at Cleveland,- in the county of Cuyahoga and State of Ohio, have invented certain new and .useful' Improvements in Dryin' --Cylinders,

and dodeclare that thefollowing is a full,

clear, and exact description of the invention,

which will enable others skilled in the art'to which it appertains to make and use the same.

My invention relates to a new and original construction of drying cylinder ada ted to be installed in a dryin apparatus, al substantially as shown an described and particu-.

larly pointed out in the claims. V V In the accompanyin drawings, Figure I is a longitudinal sectiona elevatio'nof a drying apparatus embodying my new cylinder in working relation, and Fig. 2 is a cross section of the cylinder alone.

, style of cylinder shown in my application,

.inafter fully appear. v

cylinder as an entirety, which consists of a This invention is an improvement on the Ser. No. 352,858, filed January 18, 1907, and pending concurrently herewith, as will here- Thus, 0. represents the series of six separate longitudinal sections a in this instance, substantially segmental in cross section and arranged eccentrically to -.the axis of the cylinder as seen by com arison with concentric inner and outer circ es a and a, respectively. Said longitudinal sections or plates are spaced apart and supported at their meeting or adjacent edges successively by intervening bars, strips or ribs B to which the edges of the plates are riveted 7 and which operate as longitudinal supporting to unite the sections.

members for the cylinder, giving it t 1e needed strength in all its parts'as well as serving Said bars or rails furrovided with o e'nings 1) thereof which orm draft thermore are products of combustion ass from the furnace and enter the cylin er into direct contact with the material under treatment, and

the usual suction-fan-F at the front of the.

cylinder stimulates draft through these 0 en in s. Now', having-entered the body 0 the oy inder'throu h said draft openings I pro-- vide an interna constructionwhich erforms several important oiiices, as will )e seen. Thus, I build up an entering space or chain-- her just within said openings 1) which in a sense continues or extends the draft passage at least partially above thebody or mass of material that ordinarily accumulates atthe bottom of the cylinder to reater or less depth, so that the material wi '1 be prevented from crowding out through said draft open-- ings or filling them up to cut oif the draft,

and then there is the further utility in the construction of said chamber in that its walls guard said 0 enings against the materialas it-is droppe or cascaded from the lifts as they turn the material loose from about the top of the cylinder in successive rotation, and also of serving as lifts and deflectors for the material. Now, having reference especially to the construction of these internal draft chambers or passages, it is seen that there is a wall 1 for each member referred to herein as the shorter or outer wall which is built upon the edge of the higher of the two meeting lates while the opposite or inner wall 5 referred to also as a uard wall on account of its function, is para lel to wall 4 and is erectthe same level as the inner ed ethereof and is deflected thence at an ang e of a proximately 45 degrees, or less, across t c said draft chamber or space and across the plane of wall 4' to a point that brings its edge well into the-body of the cylinder, and into complete shielding relation to its chamber and the exit therefrom into the cylinder. Of course, there is nothing arbitrary in these relative ositions,dep1ths or widths of said walls, the i ea of the inc plate 5 being to serve the several functions and purposes hereinbefore specified and also to shed and deflect the material cascadedfrom ned inner portion'of wall or.

space behind said chamber guard plate 5, as

will readily 'be seen at the bottom of Fig. 2. It will be understood, also, that the fore oing description has reference more especially to conditions and constructions as they are found at the bottom of the cylinder, where in any event the cylinder is subjected to all its more important tests of operation, and on the-assumption that having a construction which meets the conditions or needs .at the bottom of the cylinder there is no occasion for apprehension about operations at the side'and top of the cylinder as it rotates.

Between the walls 4 and 5 ofthe draft chambers I provide each'section c with a pluralityof more or less upwardly curved lift g ings between said sections and a walled draft blades 7, which carry their full capacity of material upward to near the top of the cylinderbefore discharge therefrom begins, and then the discharge is gradual and while the, fall of the material maybe more or less upon t e inner sides of walls next beneath the said material is finally discharged or cascaded from the top of'the cylinder to the bottom, and in its fall is deflected by the outer lIl-a clined surfaces of guard walls-5 behind the same.

, One of the important advantages of the present construction of the guard walls, 5, as compared with the right angled correspond ing walls in the application upon which this isan improvement, is' that these inclined guards discharge such material as falls upon them from lifts '7 from the top of the cylinder, thus causing the material to cascade through the entire width and depth of the cylinder and become exposed directly to the strong current of heat that passes through the body of the cylinder under the influence of the suction fan at the front, whereas in the right angled form of the said walls, and also in .right angled lift blades, the material is carried past the center of the cylinder to the opposite side before it is entirely discharged, and in such discharge it tends to fall on the backs of the other 11ft blades upon that side and against the sideof cylinder and does not get the benefit of the'long drop through the volume of heat in the middle of the cylinder as in the present construction. .The transversely curved lifts 7 likewise contribute to this better result as compared with right angled lifts used commonly heretofore. Said lifts are concave-convex in cross section but their concave, side is uppermost.

What 1 claim is 1. A drying cylinder formed in longitudinal sections having strengthening ribs be tween adjacent edges of said sections provided with draft openings, and'walled draft passages' inside the cylinder into which said openings discharge having varying elevation the higher of said walls being bent to an angle of inclination at their inner portions across the plane of the opposite walls into guarding relations.

2. A drying cylinder having longitudinal draft openings through the wall thereof and draft chambers in said cylinder having parallel walls of dillerent elevation on opposite sides lengtliwise,one of said walls being bent at an angle of inclination of approximately forty-"live degrees laterally and projected across the plane of the opposite wall.-

3. A drying cylinder consisting of-several longitudinal segmental sections having their meeting edges spaced apart and draft openbers.

chamber next within said openings, one wall of said chamber being erected on each of said meeting sections and the higher wall having an inclined extension projecting across said chamber andinto the interior of the cylinder, "thereby serving as a lift on one side and as a deflector, on the other and as a guard for said chamber. y

4. A drying cylinder formed in segmental sections lengthwise eccentrically arranged,

. spacing pieces between the meeting edges of,

said sections provided with draft openings and draft chambers lengthwise next within said openings provided with parallel walls, one wall being iixed on each meeting section and the higher wall having an inclined inner lilting and deflecting portion, and. transversely curved lift blades between said char in .dinal chambers, and the walls of one side of said chambers extending into said cylinder and having their inner portions arranged to receive and carry a portion of the discharge fronrsaid lift blades.

7. Adrying cylinder having aseries of walled draft chamberslengthwise inside and the walls on one side of said chambers having inner extensions at an inclination to the Walls on the opposite sides of said chambers and overlapping the same, and lift blades with concave carrying sides arranged between said Walled chambers.

8. A rotatabledrying cylinder'formed of a plurality of segmental sections spaced apart at their edges to provide longitudinal draft intakes, .and longitudinal deflecting plates within the cylinder having extensions pro jecting over said draft intakes to guard against the escape of material from said cyl.

tion' in the presence of two witnesses.

'WlLLIAM M. eU Mnn.

Witnesses 1 it. B. Moshe, l (3. MussuN.

'ieo

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