US726996A - Separating-machine. - Google Patents

Description

PATENTED MAY 5, 1903.v

kNo. 726,996.

F. H. SCHULE. SEPARATING MACHINE.

APPLIOATION FILED 00T. 2. 1900.

N0 MODEL.

UNITED STATES Patented May 5, 1903.

FRIEDRICH HERMANN SCHULE, OF HAMBURG, GERMANY.

SEPARATING-MACHINE.

SPECIFICATION formingpart of Letters Patent N o. 726,996, dated May 5, 1903.

Application flied octoter 2,19`oo.v serial No. 31,786. (No modem To all whom t may concern:V

Be it known that LLFRIEDRIOH HERMANN SCHULE, a subject of the German Emperor,`

In the separation or sorting of materials of different specific gravitiesv several factors.

come into play-mst, the difference in the specific gravity of a mixture of different inat-erials or of` the same material; second, the form of each of the particles, and, third, the condition of the surface of such particles, whether perfectly smooth or more or less rough or in other condition to result in greater or less friction when moving over a smooth surface. Taking rice as an example, before it is cleaned it contains not only hulls and blind grains lighter than the good ones, but also grains which are'partially hulled or not hnlled at all, and may contain other seeds. On the other hand,'decorticated ricecontains not only the perfect grains, but a considerable proportion of imperfect and broken grains, as well as partially-decorticated grains and grains which left the decorticating-machine unaffected. I have in both'instances recited not only constituents the specific gravity of which varies considerably, but also constituents the form of which, as Well as their' obvious at once that if the material were fed to the table at a fixed point it would notV be possible to clean rice and also effectually separate the perfect decorticated rice from irnperfect and broken andpartly-decorticated or undecorticated grains without difficulty and great loss of time.

My present invention has for its object the provision ofmeans whereby this inconvenience is largely obviated, means being also provided whereby the distance traveled over by the material can be regulated by-varying the pointat which the material is fedv to the table relatively to the points at which the constituents of different specific gravity are discharged; but -that my invention may be fully understood I Will describe the same in detail, reference being had to the accompanying drawings, in which- -Figure lis a side elevation, and Fig. 2 a `top plan View, partly in section, of a separating-machine embodying my invention.

The separating-table 2 is secured to longitudinal beams', mounted on sectoral rockers 4, the segmental face of which is provided with gearteeth meshing with racks 5 on a base-plate or onV longitudinal beams of a basal framing, and tothe longitudinal beams 3 about midway of their length is connected one end of a connecting-rod 6, Whose opposite eud is connected-to a crank 7 on a shaft 8, carrying abelt-'pulley 9', driven from any suitable prime motor, the separatingtable receiving a to-and-fro motion at right angles to its separating-channels bythe mechanism described. A In practice I prefer to connect the connecting-rod to any suitable device for neutralizy'ing shocks or provide such meaus,which, however, form no 'part of this' invention, which resides, essentially, in the construction of the separating-table or, more properly, the proximate Walls of the separating-channels thereof, which I Will now describe, referring to Fig. 2, and before doing so I may state that in practice the said table is more or less in.- clined in the direction of its separating-channels, according to the materials to vbeY separated, aud is provided With a feed-hopper 10, extending the full length of the machine at right angles to its channels and adjustable laterally toward one or the other longitudinal edge for the purpose of varying the distance traveled over by the constituents of a mixture of materials before they are discharged, as hereinabove referred to.

The separating-table 2 is divided into aseries of transverse channels 12, the bottom 13 of which is of polished sheet metal. The proximate faces of the vertical walls of the channels have rentrant angles with a long and a short side connected by a curved or concave portion and may be formed by prismatic blocks of wood 14, suitably spaced and staggered, and to which blocks the sheet-metal walls 15 and the curved plates 16 are secured, so as to form the rentrant angles 17, Whose shorter sides 18 are horizontal and at right angles to .the direction of the channels l2, while the longer sides 19 are inclined relatively to said direction of the channels.

As above stated, the series of prisms 14 transversely of the table or parallelwith the direction ofthe channels are staggered, while longitudinally of said table said prisms are arranged in parallel rows and equidistant from each other in both directions.

By the described arrangement the reentrant angles themselves are staggered in that the apices of the angle of one wall lie opposite and nearly midway the longer sides ofthe angles of the opposite Wall of a channel 12, as clearly shown in Fig. 2.

At each side of the machine extends a receiving-trough 2O and 20', respectively, into which the materials from the separatingchannels are discharged and from which troughs the materials are discharged into suitable receptacles.

In consequence of the shaking motion imparted to the table 2 the material fed into the separating-channels is thrown to and fro by the zigzag-shaped channel-walls and is thereby separated in a well-known manner-as, for instance, described in United States Patent No. 559,815-into its heavier and its lighter constituent parts. The former, sliding down the inclined bottoms of the channels in the direction of the arrows y, Fig. 2, drop into the trough 20,while the lighter contituents travel in the opposite direction, arrows e, and pass into the trough 20.

The good operation of the machine depends, essentially, upon the described configuration of the vertical Walls of the separating-channels 12 and to a great extent upon the hard polished surfaces with which the materials come in contact and travel along or over. There are, however, other factors to be considered-namely, the degree of inclination of the separating-table, the speed of the reciprocations thereof, the point at which the material is fed to the channels, and the feeding of the materials tothe channels. These factors depend, however, exclusively upon the character of the materials to be separatednamely, the dilerence in the specitlc gravity of the constituents of the material and the frictional resistance to motion of said constituents. There is, however, no difficulty in readily adjusting the inclination of the table, the speed of its reciprocations, the point at which the material is fed to the channels, and the amount of material to be continuously fed to the channels nor are these adjustments required for each mixture of materials of a different character.

Having thus described my inventiou,what

I claim as new therein, and desire to secure by Letters Patent, is-

1. In a machine of the class described, a table divided into channels by partitions, the proximate faces of which are formed by reentrant angles, a curved plate connecting the sides of each of said angles, and means for shaking said table, substantially as and for the purpose set forth.

2. In a machine of the class described, a table divided into channels the faces of which have rentrant angles having a short and a long side, and a curved plate connecting substantially the center of the short side with the long side and concentric with the medial line of the angle,4 for the purpose set forth.

FRIEDRICH HERMANN SCHULE.

Witnesses:

MAX VAEMPFF, ERNEST H. L. MUMMENHOFF.

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