US815415A - Flour-sifter. - Google Patents

Description

' PATENTED MAR. 20 1906. ,l

' W. Gf GADUE.

y PLOUR SIFTER. l APPLIATION FILED JULY 26.1905.

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WiLLrAM'TGLGADUEOFBURLINGTON, VERMONT, AssrGNoR fro vGADUE inw, or BURLINGTON,l VERMONT, A

DUSTLEss-'rnoun srrrER @OMP y VG@RIDORATI'Oli' @Ff VERMONT.

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n Beitjk-nown thatL-WILLI-AMG. GADUE, a citizen of the United States, residing at Burlington, Ainthe county: 'of Chittenden and State; of-Vermo'ntfhave invented certain new and usefull Improyernents in: Flour-Sifters 'and I do 'hereby declare the following to be a full, clear, and exact-description oftheinven.-

i' tion', such-aswill,enableothers skilled in the art to which it appert'ains; to make yand usethe same.'

My invention consistsof certain improvements -in flour-sifters ofthe general `kind setm view of the agitator;

yAisthe body ofthe 'flounreceptacle orcan,

`which, as shown, is madin cylindricalformf It has atgj its upper en df-a 3suitable device for providing., a lateral `support-'for `theupper end l:0f-the agtatnlrsllaft; which :passes loosely through it, said `device'loeingrremovable', in-

` asmuch; as the shaft Aand agitator aref so f connected together .that they'are ftaken out fromand; put into'I the can "bodily and )to- :gethen andtherefore the-,mouth'of the can IlfliUlStbe;A unobstructed 'whenthe agitator isl takenout or putin.; The devicefor furnish-A ing lsuch lateral-su port -eonsists'in the present instance,as;:il1`own, of theremovable pcover D, formed with a vrcentral hole up through which the'upp'ere'nd of the agitatorshaft loosely passes, as hereinafter-described'.

sides C of whichareicrimped, soldered, or otherwise secured at theirupper edge to the lower end of the body A. The sides C of this pan-like member are flaring, of frusto-conical shape, contracting toward the bottom, which is nearly entirely cut away, leaving only a narrow annular band or ledge D surrounding the opening, this opening being covered by a screen or netting which forms the sieve specification' of Letters ratenef Application nea my 26, 19105. serial No. 271,346.

Patented Mafh; 2 0, 'lecci surface.

.The agitator is a castingsirmlar to that set forth in `my aforesaid reissued Letters Patent, being composed of curved spokes J and farim supported upon their upturned ends.' l

The spokes, as shown, are siX in number, but

side vare curved -in one direction, while those on the` otherfside are curved in the 'opposite direction. The two center spokesrj j, as

may be of any desired number Those on one shown,'are bridged b y a center plateK, having in it a squared opening to receive the squared end lof the shaft E for actuating the agitator.` The rimsupported in elevated position on the upturned i-ends `of the spokes is,. as shown, `formed not as acontinuous ring, but in two sections MM"7 being broken away atopposite sides to leave spaces n and nf, wherebyf'the lumps and other particles .contained inthe flour will vbe Vmore readily 'thrown' outward upon the ledge D and kept there, and the agitator itself will more readily and easily cut its `way' through the iiour,fthus requiringfless' power to operate it. The agitator'is ofr'a diameter butlittle less than the bottom of the` pan-like member C, so that its spokes willeX- tend Vbeyond the sieve-surface and will lap over up on and rest on the ledge D and not upon the sieve-surface, reachingvery nearlyto the frusto-conical wall C, whichl` will thus be a guideV to assure the agitator from undue lateral shifting, even if, as in the present iny stance, itv be otherwise unconfmed.v The rimsections- M M being ,supported in elevated position upon 'the upturned outer vends Lof the Ispokes do not interfere withthe outward travel Vof the'lumps and other particles con-l I tained in the flour due .to the action ofv 'the` spokeswhen in movement. When the 'agitator is in operation, these lumps,"&cf., are'byj-f -the f action ofthe spokes thrown outwardly` beyond the sieve-surface, passing under the rim M M and upon the ledge D, where they remain. i In action the agitator does not touch the sieve-surface, nor, indeed, does it contact eXcept at the start with the ledge D, the flour soon working between the ledge and the agitator and forming a lubricating-film, which eases the travel of the spokes. To the IOO IOSI

same end the spokes have, preferably, a slight upward bend toward their outer ends. The agitator is provided with an actuatingshaft E, which passes loosely through the cover B and has on its end whichprojects above the cover an operating crank-handle F, detachably connected to it. The lower end of the shaft is reduced in diameter and squared, as at G, this portion G passing through the square opening i in the bridgeplate K of the agitator and having its eX- treme lower end upset or headed, the agitator being held between the said headed or upset end and the. shoulder H, while the shaft itself at its lower end is Wholly carried and supported by the agitator. The thickness of the plate K is less than the length of the squared portion G, and the opening i', in the plate is somewhat larger than said part G, there being thus formed between the shaft and the agitator a loose connection, Which will permit the agitator to rock upon the shaft while rotating with it.

To use the device, the agitator and its connected shaft E are first put into the can, the agitator resting on the ledge D in the position shown in Figs. l and 2. The can is then filled more or less with Hour, the cover B is put on, the shaft E passing up through the hole therein, and the crank F is fitted to the shaft. TheA sifter is now ready for work. All that is needed is to rotate the crank The shaft E is connected to the agitator and to nothing else. It rests upon and is carried by the agitator. Thus, as hereinbefore pointed out, the agitator and the shaft may be permanently connected together and can be removed from and replaced in the can bodily and together, which is not the case in the structure illustrated in my aforesaid patent. The loose joint between the two permits of a rocking motion of the agitator when in action, which facilitates the rotary movement of the same and eXpedites the sifting operation. The action of the spokes and of the elevated sectional rim has before been referred to and need not be repeated here.

The sifter thus made and operating has been designed principally for use as a iioursifter; but manifestly it can be used to sift other pulverulent materials, and I desire to be understood4 as including such use in my claims.

Having described my improvements and the best way now known to me of carrying the same into effect, I state in conclusion sisfiis that I do not limit myself strictly to the structural details hereinbefore set forth in `illustration of said improvements, since manifestly the same can be varied to some extent without departure from my invention; but l What I claim herein as new, and desire to i secure by Letters Patent, is-

1. A receptacle having at the bottom a screen and at the top a removable guide through which the agitator-shaft loosely passes and by which it is laterally supported, in combination with the agitator of a diameter greater than the screen, composed of curved spokes with upturned ends and a rim supported in elevated position thereon, and a vertical actuating-shaft, at its upper end loosely passing up through the removable guide for furnishing it lateral support, as aforesaid, and at its lower end resting upon, carried by, and loosely connected to, the agitator only, substantially as and for the purposes hereinbefore set forth.

2. A receptacle composed of a body, and a pan-like member closing the lower end of said body, having flaring sides, and a bottom consisting of a screen and an annular band or ledge surrounding the screen, in combination with an agitator of a diameter nearly that of the bottom of the pan-like member, consisting of curved spokes with upturned ends, and a rim supported in elevated position on said ends, a vertical shaft carried and supported by, and loosely attached to, the agitator only, and a removable guide at the top of the can through which the upper portion of the shaft passes and by which it is laterally supported, substantially as and for the purposes hereinbefore set forth.

3. The sifter herein described, comprising the receptacle-body A, the cover B, pan-like bottom C, D, with screen applied to the cen.- tral opening therein, the agitator, consisting of curved spokes which extend outwardly beyond the screen-surface and overlap the band or ledge D, and a rim supported in elevated position on the upturned ends of said spokes, and the shaft E carried by and connected to the agitator only and passing up loosely through the cover, substantially as and for the purposes hereinbefore set forth.

In testimony whereof I do affix my signature in presence of two witnesses.

WILLIAM G. GADUE.

Witnesses:

VERNON A. BULLARD, BEssIE H. WELLER."v

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