US825081A - Ore-screening machine. - Google Patents

Description

No. 825,081. PATENTED JULY 3,1906

'A. SGHWARZ. ORE SCREENING MACHINE.

APPLICATION FILED JULY 12, 1905.

WITNESSES:

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v INVENTOR o v f Mm? I c/ ATTORNEY UNITED STATES PATENT OFFICE.

ALFRED SCHWAR-Z, OF NEW YORK, N. Y., ASSIGNOR TO SCHWARZ ENGINEERING COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW YORK.

Specification of Letters Patent.

Patented July 3, 1906 Application filed July 12, 1905. Serial No. 269,327.

To all whom it may concern.-

Be it known that I, ALFRED SCHWARZ, a subject of the German Emperor, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Ore-Screening Machines, of which the following is a specification.

The present invention relates to a shakingscreen which is capable of general application to uses to which such devices are adapted, but which has been designed by me more particularly for the screening of ores.

Theinvention will be understood. by reference to the accompanying drawings, in whicl1- Figure 1 is a side view of the machine, and Fig. 2 an enlarged detail view of a part thereof.

Similar reference-numerals indicate similar parts in both the views.

Referring to the drawings, the machine is supported in a suitable frame comprising sills 1, uprights 2, and cross-bars or cappieces 3. These parts are securely bolted together to constitute a rigid framework. The screen comprises two sections, the upper consisting of a rectangular frame 4 of suitable timbers, or it may be of-metal, bound together by corner-braces 5. A frame 6, usually of wood, has secured to its lower side a screen-cloth 7, and said frame rests upon and is bolted to the frame a. The lower section is constructed in a similar manner. It comprises a rectangular frame 8, the sides and ends of which are secured together by cornerbraces 9 and supports the frame 10, to which the cloth 11 is secured. The cloth 7, which is of wire, is usually from about ten to twenty mesh and the cloth 11 of'much finer mesh, ranging from about twenty to one hundred, according to the fineness of the ore desired.

The frames 4 and 8 are secured together in substantially parallel relation by plates 12 and 13, bolted thereto, said plates being usually in the form of castings. There are four of these plates, two being on the side opposite to that of the View given in the drawings. The two plates 12 are of less length than that of the plates 13 for the purpose of inclining the screens forward.

In the lower ends of the plates 12 and 13 are secured studs, on which are mounted rollers 14, said rollers being preferably grooved and adapted to rest upon and travel over plates 15, bolted to the sills 1. Said plates are formed with raised or cam surfaces 15, which give a jogging motion to the screens when the latter are reciprocated longitudinally by the following means: Secured to the outer sides of plates 12 and 13 are studs 16 and 17, respectively, to engage slots in the lower ends of rods 18 and 19, there being similar rods on the opposite sides of the machine from that shown. The rods 18 and 19 at their upper ends are secured to rocksha-fts 20 and 21, respectively, which shafts extend across the top of the frame and are supported in bearings 22 and 23, secured to the beams 33. Supported in brackets 24, secured to the uprights 2, is a shaft 25, which carries a pulley 26, adapted to receive a belt from a suitable source of power. On the shaft 25 is mounted an eccentric 27, the rod 28 of which is connected at its outer end to a cross-bar 29, said bar being secured to and extending between the two upright rods 18. Extending transversely of the two screen-sections is a wall having side pieces 30, the purpose of which is to preventany material from falling from the upper screen outside the lower screen. Connected to the frame 6 is a chute 31, leading to a suitable bin to carry off the oversize fromthe upper screen, and 32 is a similar chute leading from the lower screen to carry off the oversize from the latter.

The operation of the machine will be readily understood from the above description. By reason of the eccentric connection the two screens are given a longitudinal reciprocatory movement and by reason of the camsurfaces 15 a vertical jogging movement, the resultant of these two movements effecting a complete screening of the ore; Theore to be screened is fed to the upper section 4 by any suitable means, the material passing through the cloth 7 fallingto the lower section 8. The material that passes through the cloth 11 is collected in asuitable bin or hopper. The oversize from the sections 4 and 8 are carried off by the chutes 31 and 32, respectively.

, The'shaft25 in practice makes about, one hundred and twenty -'iive revolutions per minute, and the throw of the eccentric is lower one to a position sligh number may be employed. The manner of securing the frames 6 and 10 to the frames 4 and 8,respectively, renders them removable when it is necessary to renew the screen cloths? and 11 or to replace them by a cloth of diiferent'mesh;

As shown in the drawings, the screen-sections are inclined forward, thus throwing the advance of the upper section.

What I claim, and desire tej ters Patent, is

1-. A screen comprising aplrrrahty of sections secured together by airs of plates one pair being of less length t an the other and thesaid sections secured thereto in substan tial parallel relation in planes inclined to a horizontal plane, cam-surfaces over which said plates are adapted to be moved, and means for imparting a longitudinal recipro eating movement to the'scieen-sections.

,A screen comprising a plurality of sections secured together by pairs of plates, studs carried by said plates, pairs of vertical ie by Letrod's having slotted ends for engaging said studs, rock-shafts to' which said rods are secured, means for imparting a vertical jogging movement to said sections, an eccentric-andpitman connection to said rods, and means for-actuating said eccentric. V

3. A screen comprisin a plurality ofsections secured together y pairs of plates, rollers supported by said plates, cam-surfaces upon which said rollers rest and upon which they are adapted to be moved, studs carried by said plates, nairs of vertical rods engaging said studs, rockshafts to which said rods are secured, and means for imparting through said rods a longitudinal reciproeating movement to the screen-sections.

4. In a machine of the character described the combination of a frame, rock-shafts supported thereon, pairs of rods secured to said shafts said rods having their lower ends slotted, a plurality of screen-sections secured together by plates, studson said plates engaging the slotted ends of said rods, an eccentricanditman connection therefor to one pair of said rods to impart a reciprocating movement to the screen-sections, and means to impart a vertical jogging movement to said sections.

5. A,screen comprisinga plurality of sections secured together by pairs of plates, one pair being of less length than the other and the said sections secured thereto in substantial parallel relation in planes inclined to a horizontal plane, grooved rollers supported by said plates, cam-surfaces upon which said rollers rest and upon which they are adapted to be moved, and means for imparting a longitudinal reciprocating movement to the screen-sections. V V

In witness whereof I have signed my name to this specification in the presence of two subscribing witnesses."

' ALFRED SCHWARZ.

Witnesses: i 4

SAMUEL M. IVIARCUS, ()LIN A. FOSTER.

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