US1049052A

US1049052A - Screen or separator.

Info

Publication number: US1049052A
Application number: US69192612A
Authority: US
Inventors: John C Clark
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-04-19
Filing date: 1912-04-19
Publication date: 1912-12-31
Anticipated expiration: 1929-12-31

Description

J. O. CLARK.

SCREEN 0B. SEPARATOR.

'APPLIOATION FILED APR.19, 1912.

1,049,052. Patented Dec. 31, 1912.

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i i/human: v 43 j /d w J. G. CLARK.

SURE-EN 'OR SEPARATOR.

APPLICATION FILED APR. 19, 1912. I 1,049,052, Patented Dec. 31, 1912.

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lmmmo M MW UNITED STATES PATENT nron JOI-INC. CLARK, OF ATLANTA, GEORGIA;

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particularly to devices for screening pulrerized materials.

. The objects of the inventionare to provide a screen or separator which is simple in construction, durable and efficient in operation.

The invention relates specifically to that class of screens which are arranged on an incline and vibrated by means of suitable intermittently acting hammer mechanisms and the features of novelty will be apparent from the following description taken in connection with the accompanying drawings, in which Figure 1 is a front view of a screen embodying my invention, certain parts being broken away to illustrate other parts; Fig.

2 a longitudinal section on the line 2-2 of Fig. 1; Fig. 3 is an enlarged side elevation of one of the striking or hammer mechanisms; and. Fig. 4 is afragmentary transrerse section on the line et4 of Fig. 2.

p In the drawings, lO'and 11 indicate upright members which have their lower ends connected with the base members 12 and 13 The base members 12 and 13 are connected together near the uprights 10 and 11 by means of a cross-piece 14:. The

uprights 10' and 11. carry at their upper end one end" of the inclined members 15, the lower end of these members being" connected with the base members 12 and 13. Cleats 17 are secured along the lower edges of the members 15 and have secured thereto the bottom boards 18 and the removable bottom section 19. The boards 18 andthe removable section 19 are preferably covered on their upper side with sheet metal so as to form a durable wearing surface which will also permit the" material to slide freely therealong. Cleats 20 are also secured on the inner sides of the members 15 and cooperate with the cross beams 21' and to support the screen 23. The screen 23'is secured at its upper end along the underside of a cross memben24 which is preferably se- Specification of Letters Patent. Patented Dec. 31,1912. Application filed April 19, 1912; Serial Nb.-e91,92e.-

secured to a cross-piece 26 and is preferably provided with longitudinal extending

rein forcing strips

27 and 28. Secured to the members 15 above the cleats 20 are the members 29, along the top edge of which is secured the screen 30 which is preferably ithe screens. The screen 23 has its lower end constructed with reinforcing strips 31 and 32 in'thesame manner as the screen 23.

The removable topplates 34; are supported on the'upper edges of the members 15. The lower'end of the casing inclosing the screens may be closed by a suitable cross-piece 35. Ihe'upper end of the screen 30 is secured to the top of the member 24 and the lower end.

of'said screen is secured to a cross member '36, Which is preferably secured to the members 29. n

At the top of the inclined frame'for they screens is a conveyer for 'the material to be screened; This conveyer may be of any desired construction but I prefer to use and have illustrated a conveyer Which consists of a box or casing 37 having an inlet 37, and in which is a shaft 38. The shaft 3% carries a screw conveyer of the usual 'constructionf At-the lower front-corner of the casing 37- is an opening 39 through which:

the-material may be discharged from the casing 37 on to the screen 30. The opening 39 may be controlled by a sliding gate 40 'which may be conveniently operated by"- screw 41 having suitable. handwvheels 4L2. Extending transversely of the screen casmg below the screen 23 are shafts 43. l

have shown three such shafts but it will be understood thatI may use any number as may be fou-nddesirable. -These shaftsare supported in bearings 44:, secured to the members 15 and on. the exterior thereof.

The shafts 43 have on one end thereof driving pulleys 45 which are engaged by a belt {16, the latter being driven by means of pulley 16 mounted on'one end of the con veyer shaft 38, the opposite end of this shaft being provided with a drive pulley 3S. Idler pulleys M may be arranged adjacent the pulleys 45 to increase'the area of contact of the belt'46 on the pulleys 45. The' shafts 43 carry plates-{l8 having lateral extensions 49 which are adapted to receive set screws or pins 50. The set screws 50 engage threaded openings in the extensions 49 and are provided with lock nuts whereby the screws may be adjusted and securely held cured to the back-25 of the casing inclosing l n position.

On the under side of the screen 23 above the plates -48 are the plates 53. These plates are preferably secured to the reinforcing strips 27 and 2S and on the top of the strip 27 I arrange a plate and secure this plate and the plate 53 in position by means of suitable bolts 55. The plates .33 are provided with inclined surfaces 56 which are adapted to be struck by the outer ends of the screws 50, as the shafts +13 rotate. This arrangement is clearly illustrated in Fig. 3.

The reinforcing strips 31 and 32 for the screen are preferably arranged directly above the

strips

27 and 28 for the screen 23 and on the under side of the strips 32 l secure the members 57 by means of suitable bolts Set screws 59 have screw-threaded engagement with the members 57 and project above the reinforcing strip 31 and are provided above the latter with looking nuts 60 which are adapted to hold the set screws in position. The lower ends of the screws 59 normally bear on the upper surface of the plates so that when the members 53 are struck by the screws 50 the force of the blow will be conveyed to the screen 30. i

The operation of the mechanism is as follows The material to be screened is fed into the inlet 37 of the conveyer casing 37 and is conveyed through the casing 37 by means of the screw conveyer above described. The

gate 40 being open to any suitable extent permits the material to fall from the casing 37on to the screen 30. The screen 30 is preferably much coarser than the screen 23 so that as the material moves downward on the screen 30 the smaller particles Will fall through the meshes of the screen on to the screen28. The rotation of the shafts 43 causes the set screws 50 to strike the inclined surfaces 56 on the members 58 and suddenly lift the screens with the material thereon. The suddenness of the blow struck by the screws 50 causes the finer particles of the material to pass through the screens and also causes the coarser particles to be projected away from the screens and then fall back on to the same. \When these particles again strike the screens they cause the finer particles to fall through the meshes. Each time one of the screws 50 strikes an inclined surface 56, some of the fine material will fall through the screen and the blow of the coarser iarticles on the screen, due to their falling onto the screen after being projected. away from the latter, causes an additional quantity of the fine material to fall through the screen and therefore it will be seen that v the machine will have a very large screening capacity. The force of the blow struck by the screws 50 being conveyed to the screen 30 by means of the set screws 59, it will be seen that the

screens

23 and 30 will be caused to vibrate in unison. The lines of the material screened will pass through both of the blows may also be varied by changing screens and slide down the inclined bottom.

of the casing. The medium-sired particles will slide down along the screen 23 and off the bottom thereof, while the coarsest particles-will slide down the screen 30 and off the bottom end of this screen. At the bottom of the casing suitable chutes or convey- ,ers may be provided to carry away the sepa- By providing the adjustable set screws 50 and 59 I am able to closely regulate the action of the screen 30 and also vibrate both screens from a common vibrated mechanism. The amplitude of the vibrations may be varied by adjusting the screws 50 and the rapidity of the blows may be varied by increasing or decreasing the number of screws carried by the plates 48 or by changing the speed of the shafts. 43. The force of tjie t e speed of. the shafts 43 and adjusting the screws 50.

It will be understood by those skilled in the art that various changes may be made in the minor details of my invention within tween said supports, a shaft arranged transversely of the machine below the screen, and continuously rotating means rigidly mount ed on said shaft adapted to intermittently strike said plate. 2. in a machine of the class described, the combination of an inclined screen, means for rigidly supporting said screen intermediate its ends, a shaft arranged below the screen. a striking plate on the under side of said Screen, and adjustable means ii'igidly mount-- ed on said shaft adapted to strike saio strilc ing plate. I

3. In a. machine of thee ass described. the combination of an inclined screen. a plurality of cross members adapted to rigidly support said screen intermediate its ends. a plate arranged on the under side of said screen and having a striking surface inclined relative to the latter. a shaft below said screen, a member rigidly mounted on said shaft. and a plurality of adjustable screws carried by said member and having one end thereof adapted to strike said inclined surface when said shaft is rotated.

In a machine of the class described, the combination of a plurality of inclined screens arranged one above theother, a shaft arranged below the lower of said screens, a striking plate on the under side of the lower screen, a rigid spacing member secured to the upper screen and adaptedto engage the upper'side of the lower screen directly above said striking plate, and means on said shaft adapted to intermittently'strike said striking plate when said shaft is rotated.

5. In a machine of the class described, the combination of. a plurality of inclined screens arranged one above the other, means adapted to rigidly support the lower of said screens, a striking plate on the under side of the lower screen, an adjustable spacer secured to the upper screen and adapted to engage the upper surface of the lower screen directly above said striking plate, and means on said shaft adapted to strike said striking plate when said shaft is rotated.

6. In a machine of the class described, the combination of a plurality of inclined screens arranged one above the other, a plurality of cross members adapted to rigidly support the lower screen intermediate its ends, a striking plate secured to the under side of the lower screen between said cross pieces, spacer secured to the upper screen and adapted to contact with the upper surface of the lower screen directly above said striking plate,and means carried by said shaft adapted to strike said striking plate when said shaft is rotated.

T. In a machine of the class described, the combination of a plurality of inclined screens arranged one above the other, a shaft arranged below the lower screen, a striking plate secured to the under side of the lower screen, an adjustable spacer secured to the upper screen and arranged to contact with the upper side of the lower screen directly above said striking plate. and a pluralityof adjustable members rigidly mounted on said shaft and adapted to strike said striking plate when said shaft is rotated.

8. In a machine of the class described,the combination of a plurality of inclined screens arranged one above the other, a plurality of shafts arranged below the lower screen, a plurality of striking plates secured to the under side of the lower screen, a plurality of spacers secured to the upper screen and arranged to engage the upper surface of the lower screen directly above said striking plates, and means carried by said shafts adapted to strike said striking plates.

9. In a machine of the class described, the combination of a plurality .of inclined screens arranged one above the other, a plurality of members adapted to rigidly support the lower screen intermediate its ends, a plurality of. shafts arranged below the lower screen, a plurality of striking plates secured -to theunder side of the lower screen, a plurality of adjustable spacers secured to the upper screen and arranged to contact with the upper surface of-the lower, screen di rectly above said' striking plates, and means carried by saidshaft' adapted to strike said striking plates to vibrate both of said screens.

10. In amachine of the class described, the combination of, a plurality of inclined screens arranged one above the other, a plurality of shafts arranged below the lower screen, a plurality of members arranged be-. tween said shafts and adapted to rigidly support the lower screen, striking plates secured to the under side of the lower screen. a plurality'of spacers secured to the upper screen and adapted to contact with the upper surface of the lower screen directly above fsaidstriking plates, and means carried by said shafts and arranged to strike said striking plates when said shafts are rotated.

11. "In a machine of the class described, the combination of a plurality of inclined screens arranged one above the other, a plurality of shafts arranged below the lower screen, a plurality of striking plates secured to the under side of the lower screen, adjustable spacing screws secured to the upper screen and having their lower ends arranged to contact with the upper side of the lower screen directly above said striking plate, and a plurality of adjustable members carried by each of said shafts arranged to strike said striking plates when said shafts are rotated.

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

JOHN C. CLARK.