US660925A - Plansifter. - Google Patents

Description

(No Model.)

Patenten oct. so, 1900. H. G. G. RSE'.

PLANSIFTER. '(Appue'atmmedct. 2o, 1897.)

b5 l 2 Sheets-Shet l.

Patented 0ct. 30,1900.

' HOSE.

P LA N S l FT E R (Application led Oct. 22, 1897.)

(Nro Model.)

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NITED STATES PATENT EEICE HENRI ROSE AND., GEORGES ROSE, or POISSY, FRANCE.

PLA'NsrF'TEa.

sPEoIFrcATIoN forming part of Letters Patent No. 660,925, dated. october 3o, leo. Application ledOCtOherZrO, 1897. Serial No. 655,783. (No model.)

To UI/Zlwwm it may concern:

Be it known that we, HENRIROSE and GEORGES ROSE, citizens of the Republic of France, residing at Roissy, department of Seine-et-Oise, France, have inventedv certain new and'useful Improvements in Plansifters, (for which we have obtained Letters Patent in France, No. 255,505,1dated April 13, 1896, with two additions dated September 18, 1896, and October 12, 1896; inBelgium', No. 127,266, dated March 29, 1897, vand in Russia, application led April'17, 1897,) of which the following is a specification.

The present invention consists of certain improvements in the cloth-brushingand stockpropelling devices employed in plansifters (whether rectangular or circular) having a sieve-box which is suspended a certain distance from the ground and has imparted to it a gyratory motion, the lmain object of our improvements being to utilize said gyratory motionfor effecting the operation of such clothbrushing and stock-propelling devices without the necessity of employing independ ent mechanism for the purpose, whether such devices are above or below the sifting-surfaces or sieves. By this means the crushed grain or stock is rubbed in order to detach the flour therefrom, a regular progressive motion both of the stock and of the sifted material is insured, and the sieves or sifting-surfaces are thoroughly and constantly brushed and cleaned.

In the annexed drawings we have shown by way of example the application of our improved cloth-brushing devices and stock-propelling devices to an ordinary rectangular plansifter; but it will be readily understood that the same devices can be equally well applied to a circular plansifter.

Figures 1 and 2 are respectively a side View and an end View of a plansifter built in accordance with our invention and having a rectangular box. Fig. 3 is a longitudinal section of one ofthe sieves with an upper brush working in conjunction therewith and means for controlling the operation of said brush. Fig. 4 is a plan or top view of the sieve, the brush, and the controlling mechanism therefor. Fig. 5 is a transverse section on the line 5 5, Fig. 4. Fig. 6 is a longitudinal section of part of the sieve, showing the cleaning-brush beneath the same and a special stock-propelling device above the same. Fig. 7 is a plan or top view of the construction shown in Fig. 6, one part of said View showing the stock-propelling device above the sieve and the other part of said lView showing the sieve removed and the brushing devices which are employed below the same. Fig. 8 is a transverse section O11 the line 8 8,`I `ig.V 7,- but showing ,both the stock-propelling device above the sieve and the brushing device and its controller below the sieve.` lflig. 9 is a longitudinal section of part of the sievestructure, showing another form of sieve-controlling device. Fig. l0 is a top ,orl'plan view of the structure shown in Fig. 9, one half of said View showing the stockother half of thel view showing the brushframe and its controller below the sieve. Fig.

Fig. 10, but showing a feature of the invention not shown in said Fig. l0; and Fig. 12 is a section, on an enlarged scale, of one of the elements of the device shown in Fig. ll.

The box a of the plansifter is suspended by rods b, which are connected at their lower ends by universal joints lto' brackets on the box and at their upper ends by similar universal ljoints to Asuitable hangers at the tops of the columns c c, o', and c2. `The box receives its gyrating motion from a crank-disk d, secured upon a vertical shaft e, and rotary motion is imparted to the latter from a horizontal shaft f, the latter having a pulley f for receiving a driving-belt and another pulleyf?, which, by means of a twisted belt f3, drives'a pulley e' ou the vertical shaft c, and as the box c is free to move to a limited extent in any direction horizontally because of the swinging character of its Supports the resultant motion imparted to the box bythe disk CZ is a gyrating motion. The box a contains a number of compartments or sieves, which cooperate either with detaching-brushes placed above the siftingsurfaces, as in Figs. 3,41, and 5, or with cleaning-brushes placed below said sifting-surfaces and operating in conjunction with stock-pro Each of the sieves shown in Figs. 3, 4.-, and 5 consists of a frame c, which is suitably sepelling devices above the sieves, as in Figs.

propelling device above the sieve and the 11 is a transverse section on the line 11 11,

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cured to the box'ct and has a bolting-cloth or other sifting-surface 7i and a detaching-brush y' above the same, the latter being suspended above the cloth by means of cross-pieces g', mounted upon blocks g4 on the sieve-frame and serving as supports for bars j', which span the spaces between the blocks js on the back of the brush.

When the plansifter is in action, the inertia of the brush tends to cause movement ot' said brush in relation to the frame g of the sieve, and such movement is governed by a controller consisting of a bar g2, mounted upon the blocks g and having a circular or elliptical groove or channel gi, in which is free to travel an antifriction-roller jg, mounted upon a pin or bolt which projects upwardly from the bar j. In the present instance a Acircular groove or channel is formed in the controller g2 by forming a circular opening in the latter and mounting centrally therein a circular block g5, which is carried by a crossbar gf.

In the sieve shown in Figs. 6 to 11 the bolting-cloth or other sifting-surface l is confined between frames 7c 7c' one above the other, and in the upper frame or above the sieve are arranged a series of rakes mounted upon a common bar m., the purpose ot' said rakes being t0 propel the stock. The said ra kes are formed of inclined scrapers n, the lower edge of each of these Scrapers being as close as possible to the surface of the sieve l without touching the same, a result which is effected by mounting the bar m, at the proper distance above the sieve. The cleaning-brushes 0 are car ried by a bar o, which is suitably supported upon transverse bars 7s? in the lower frame 7a of the sieve-casing, so that it is Afree to move both longitudinally and transversely.

As shown in Figs. 6 and 7, the brush-com troller consists of a ring p, suitably mounted in the lower framet of the sieve structure and having a bottom composed of a sieve p'. In this ring are similar rings q q', 'of soft rubber, leather, metal, or other suitable material and of the same orot' different diameters, which in connection with the ring p serve to restrain and limit the movements of the roller or disk q2, which is suspended from the brush-bar 0' by means of a bolt cl3 and nut q1.

In the brush-controller shown in Figs. 9 and l0 a block "r, having a hexagonal recess r in its under side, is secured to theunder side of the brush bar or frame o, and into this recess projects a polygonal block s, which projects upwardly from the transverse bar s, secured to the sieve-frame 71:', the elect of this construction being to impart an irregular and non-uniform motion to the brush-holder o'. The block fr rests upon the bar s, and the brush-bar o may be adjusted vertically7 in respect to said block by means of nuts t', applied to a threaded bolt t, projecting above the block r, said nuts t engaging with a yoke t2, secured upon the brush-bar o.

In the construction shown in Fig. l1 the bar s has a central opening closed by a screen s2, and the block s' is carried by this screen and engages with a circular or polygonal recess r, formed in the under side of the block I r. By providing the openil'igs in the ring p and bar s with sieves p' and s2, as shown, the accumulation oi' sifted particles therein is prevented and the interference with the operation of the brush-controlling devices which would result from such accumulation is overcome. Each of the sieve structures may have the lower frame provided with a transverselyinclined 1'eceivingbar o, so as to direct to a common point of discharge the material sifted through the screen.

The brushes need not necessarily be arranged as shown in the drawings. For instance, they might be lengthwise of the frames instead of crosswise, or in the case of a circular sitter may be curved instead of straight. In all cases, however, the brushes are mount ed so as to move as a unit and owe their motion solely to the gyrating movement of the sievebox, no special mechanism for imparting movement to the brushes being required.

IVe propose to adopt either the brush-operating device shown in Figs. 6, 7, and 8 or that shown in Figs. 9, 10, and 11, depending upon whether a uniform or non-uniform motion of the brushes is best suited to the stock which is being treated.

Having thus described our invention, we claim and desire to secure by Letters Patent- 1. The combination in a plansifter, of a screen or sieve, means for imparting gyrating movement thereto, a longitudinal brush-carrying bar or frame Ifree to move both longitudinally and laterallyin respect to the sieve as the latter is gyrated, and a controlling device for said bar or frame, said controlling device consisting of a guard having a recess of circumscribed area, and a projection, the movementof which is restricted by said guard, the recess of the latter being of such dimensions as to permit limited movement of the brush bar or frame both longitudinally and laterally but prevent traveling movement of the same, substantially as specified.

2. The combination in a plansifter, of the sieve or screen and means for imparting gyrating movement thereto, a series of cleaningbrushes for said screen, a bar or frame con necting said series of brushes and causing them to move as a unit, a cross-bar, as gf, mounted on the sieve-frame and a bar or plate, as j, mounted on longitudinally-separated supports, asj, on the brush-bar and resting on said cross-bar, whereby while the latter supports the brush-bar it permits movement of the same both longitudinally and laterally, substantially as specified.

3. The combination in a plansifter, of a sieve or screen, means for gyrating the saine, a series of cleaningbrushes for the screen, a frame or bar to which said series of brushes is secured and by which said brushes are caused to move as a unit, said brush frame or bar being free to move in respect to the screen as the latter is gyrated, a projection on the brush bar or frame, and a recessed guard for restricting the freedom of movement of said projection, said guard havin:` a perforated screen closing the bottom of said recess, substantially as specified.

4. The combination in a plansifter, of a sieve or screen means for gyrating the same, a series of cleaning-brushes for the screen, a frame or bar to Which said series of brushes is secured and by which said brushes are caused to move as a unit, said brush=frame being free to move in respect to the screen as the latter is gyrated, a block connected to lygonal recess in the block which is attached to the brush-bar, substantially as specified. In Witness whereof we have hereunto set our hands, this 7th day of October, 1897, in

presence of two subscribing Witnesses.

HENRI ROSE. 1 GEORGES ROSE Wi'tnesses RAPHAEL H. BRANDON, EDWARD P. MACLEAN.

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