US455375A - hamilton - Google Patents

Description

(No Model.)

D. WHITTAKER 55 L. H. HAMILTON.

. STONE SEPARATOR. I No. 455,575.

Patented July 7. 1891.

w: mams ravens co.. moro-urne.,

UNITED STATES` PATENT OFFICE.

DAVID IVHITTAKER AND lLOUIS H. HAMILTON, OFMILVAKEE,VISOONSIN, ASSIGNORS TO THE lVHlT-TAKER STONE SEPARATOR COMPANY, OF SAME PLACE.

sToN E-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 455,375, dated July 7, 1891.

Application filed April 22, 1890.

To all whom) it 77mg/ concern: p

Be it known that we, DAVID WHITTAKER and LOUIS H. HAMILTON, of Milwaukee, in the county of Milwaukee and State of Tis- 5 consin, have invented new and useful Improvements inA Stone-Separators; and we do hereby declare the following to be a full, clear, and exactdescription of said invention, reference being had to the accompanying drawings,

" [o and io the letters of reference marked thereon, which form a part of this specification.

In the preparation of clay as taken from its bed in the earth for manufacturing brick,

tile, or other articles it is necessary to sepa- 15 rate and remove therefrom the pebbles or stone, 1f any therein; and our .invention relates to a machine constructed and adapted for separating and removing such pebbles or stones, or irreducible lumpy material. there- 2o from.

The machine is adapted for working the clay and removing the pebblesor stones therefrom, ordinarily, in the condition in which it `1s when taken from the ground; but iftoo -2 5 hard for easy working then with the addition of such water as may b e required to reduce the clay to a plastic consistency.

The invention consists of mechanism for forcing the material through the machine, a means for automatically separating the pebbles or stones from lthe clay, a pocket or aux- 1l1ary receptacle in which the pebbles orstones are accumulated, and means for removing` them from the machine. I I

In the drawings, Figure l is an elevation of oui` complete machine. Fig. 2 is a central vertical section of the same machine. Fig. 3 is a bottom view of the separator. Fig. L is a transverse section ot' the separator on line 4 4 of Fig. 2, looking downwardly.

A is a frame on which the operative mechanism 1s supported. A case B, advisably in cylindrical form and having a funnel-shaped top O, is supported on the frame A, preferably vertically, and at its lower end opens mto an auxiliary receptacle D, also preferably made in the cylindrical form. The receptacleD is provided with sliding doors E E and with a large number of apertures F F, preferably elongated slots, formed in the vveniently in frustoconical form, forming a serai No. 348.963.' N0 model.)

sides of the receptacle, advisably in the walls of the receptacle, and also in the doors E E. The central part of the bottom of the receptacle D is thrown upwardly a distance conchamb'er G in the receptacle D at the side of and below the top of the re-cntering part of the bottom of the receptacle. The bottom of the receptacle consistsv of the outer bottom part H, of the inner upwardly-extending circular wall I, and the top K. The part Hof the bottom is provided with gates or slides H. The top K of the re-entering part of the bottom of the receptacle is provided with a large number of apertures L L, preferably constructed as elongated slots and. advisably arranged in circles therein, whereby this portion of thebottom is adapted for and becomes a screen. The bottom H and the gates H therein are also slotted or perforated. The top or screen of the re-entering part of the bottom is of about the same diameter horizontally as the diameter of the case B:

A revoluble shaft M is located centrally of the case B and has a journal-bearing in the 7 5 top K and another journal-bearing in the frame A. This shaft is provided with a beveled wheel N, meshing with a pinion O on a driving-shaft. An intermediate j ournal-bearing P is preferably provided in the lower part of the case for the shaftrM to still further Isteady and support the shaft.` The shaft is also provided with a screw R, which may be either in` continuous form or in a series of screw-blades,'extending without intermission or with but small separations from the funnel down nearly to its lower extremity. This screw is adapted as the shaft is rotated to force the contents of the case downwardly therein, and partly into the receptacle D and partly out through the apertures.

A scraper S, consisting of two laterally-extending arms advisablyreversely curved outwardly, rearwardly with reference to their line of rotary motion, is fixed on the lower end of 95 the shaft M just above the screen K. IVe also preferablyprovide radial arms T T, fixed in the shaft M near the top of the receptacle D, which arms carry rigid thereon the downwardly-projecting blades U U, inclined rearroo wardly to their line of rotary motion. These blades U U are located outside the circle described by the screw R and above the annular chamber G. These arms T T, with their blades UU, are not necessary to the complete and successful working of the machine, and their omission does not with most qualities of material detract from or reduce the efficiency of the machine. A tank V is located below th e receptacle D to receive the clay discharged therefrom.

The operation of this device is as follows: A supply of plastic clay containing pebbles or stones is fed into the case B through the funnel C, and as the shaft M rotates the mass of clay and contained pebbles is carried downwardly against the top K of the re-entering part of the bottom of the receptacle D, through which it mostly passes, the revolving scraper S serving to constantly keep the surface of the top K comparatively clean, forcing the pebbles and stones laterally toward the sides of the receptacle, while tlieconstantly-renewed supply of clay forced downwardly by the screw M presses against and passes through the screen K, falling into the tank V. As the pebbles and stones are forced off the screen' K laterally toward the side Walls of the receptacle D they fall iutothe chamber G, and as this chamber fills up with stones, pebbles, and a certain portion of the clay that is forced laterally off the screen K by the scraper S the plastic clay will, by reason of the pressure on the material in the machine, be forced out through the apertures iii the sides of the receptaele D and through the apertures in the bottom H and gates II. Vlien a considerable supply of pebbles and stones has accumulated in the auxiliary receptacle D, either in the chamber G or above it, the doors E E in the sides of the receptacle of the gates I-I II in the bottom, or both, may be opened and the stones and pebbles removed from the receptacle.

Vhat We claim as neW,and desire to secure by Letters Patent, is

l. In a stone-separator, the combination, with a suitable case, a feed device therein arranged to force the material through the case in the direction of its length, and a screen at the discharging end of the feed device arranged at right angles to and across the direct line of movement of the material through the case, the apertures through the screen being of a size to permit the passage of plastic clay and to prevent the passage of stones, of an auxiliary receptacle located at the side of and beyond the end of the feed device and of the screen, apertures in the Walls of the auxiliary receptacle to permit the passage of plastic clay and to prevent the passage of stones7 and/doorsin the walls of the auxiliary receptacle for the removal of stones, substantially as described.

2. In a stone-separator, a case having a screen at its discharging end, a feed device, an automatically-operating cleaning device, and a receptacle at the discharging end of tlie case, adapted to receive and retain pebbles and stones and having apertures to permit the passage therefrom of plastic clay, all coinbined substantially as described.

3. In a stone-separator, the combination, with a suitable case and a therein-revolving shaft and feed device, of a receptacle at the discharging end of the case,which receptacle has a centrally re-entering bottom, the re-entering part having a screen-top, and a scraper fixed to the revolving shaft and located gust above the screen and adapted as the shaft revolves to clear the surface of the screen and to force pebbles and stones laterallybeyond the scraper, substantially as described.

4. In a stoneseparator, the combination, with acase, a tlierein-rotating shaft and feed device, a screen at the end of the shaft across the direct line of movement of material in the case, and a scraper fixed to the shaft and adapted to automaticallyclear the screen of stones and force them laterally therefrom, of an auxiliary receptacle-.at the side of and beyond the screen, doors in the walls of the auxiliary receptacle for the removal of stones, and other unclosed apertures in` the Walls of the receptacle for the passage of plastic clay only, substantially as described.

5. In a stoneseparator having a suitable case and a revolving feed-screw therein, the combination, with an auxiliary receptacle located at the lower terminal end of the feeding-screw, which receptacle has perforated sides and sliding doors and a re-entering central part of its bottom, of radial arms fixedin the shaft carrying inclined blades, as U IT, substantially as described. y

6. In a stone-separator, a receptacle, as D, having perforated sides and bottom and doors in the sides and bottom, the bottoni having a re-entering central part, in combination with a scraper located immediately above the topot the re-entering part of the bottom, radial arms, as T, carrying inclined blades, as U U, and means, substantially as described, for carrying and rotating the scraper and the arms and for receiving and feeding the material into the machine.

In testimony whereof We affix our signatures in presence of two Witnesses.

DAVID WHITIAKER. LOUIS IVI. HAMILTON.

\Vitnesses:

(3."1. BENEDICT, ANNA FAUsT.

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