US1282127A

US1282127A - Screening apparatus.

Info

Publication number: US1282127A
Application number: US10281716A
Authority: US
Inventors: Willard D Richardson
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-06-10
Filing date: 1916-06-10
Publication date: 1918-10-22
Anticipated expiration: 1935-10-22

Description

W. D. RICHARDSON.

SCREENING APPARATUS.

APPLICATION FILI-:D IuIIE Io. Isle.

L. Panted 004.. 22, 1918.

3 SHEETS-SHEET Howie/Ig W. D. RICHARDSON.

SCREENING APPARATUS.

APPLICATION FILED IuIIE I0, IsIs.

' LQST. Patent-ed .Oct 22, M918.

3 SHEETS-SHEET 2.

I. D. RICHARDSON.

SCREENING APPARATUS.

APPLICATION FILED JUNE IO, 191. Elggfin Paented 0st. 22, 1918.

' 3 SHEETS-SHEET a.

WKLLABDD. RICHARDSON, 0F HEERDE, NORTH SCREENING APPATUS.

Bpeoiicatlon'of Letters Estant.

Patenten not. ea, este.

Application led June lo, 1916. Serial No.' 102,81?.

' To all wsom it ma concern.'

Be it @own t at I, Winnaar D. Bron- AnnsoN, a citizen of the United States vof America, residing at Hebron, in the county oi Morton and State of North Dakota, have invented certain new and useful Improvements in Screening Apparatus, of which the following is a specification. A

My invention relates to screening appa# ratus and has to do particularly wlth t at class of screening or separating machine composed of cloth and stretched and fastened upon steel frames and' in which the screen is jarred and vibrated by percussive action or impact upon the reinforced screen cloth or frame. My aim is to rovide mechanism which is readily accessi le for cleaning and repairing and which, at the same time, is capable of performing all of the steps of screening eiiciently and with a minimum number of elements.

One ofthe important features of my invention arises from the fact that l utilize, in combination with one or more fine meshed screens, a scalping screen whichprotects the fine meshed screens from the coarser particles of the material; is of such nature and so disposed that the line meshed screens are readily accessible, and which renders an independent conveyer element unnecessary. Frequent cleaning is necessary in screens of this type', particularly in cold weather when plasticmaterials are being operated upon and my screen structure is peculiarly desirable in that the scalping screen does not interfere withdirect access to the finer screens.

Another important feature of my invention'resides in the fact that my feeding and scalping screen is so located and supplemented that it may distribute the partially screened material to both sides or either side of a central line, which central line forms the apex of adjacent downwardly inclined screens. The regulating mechanism comprising a part of my invention makes possible the regulable control of the amount of material to be fed to either of these screens and may be so adjusted that one screen only is operated, it being understood that one of these downwardl inclined screens may be entirely dispense with.

One of the important features of my invention has to do with a novel vibrating mechanism for the inclined screen structure,

whether this inclined screen structure comprises a single screen or multiple superposed screens. This peculiar vibrating mechanism is simple and eective in that it delivers series of light rapid blows upon the upper sides of the screens, giving the intense vibration of the screen cloth required for large capacity and to prevent clogging of the mesh scalping screen l decreasing in diameter from the right to left of Fig. 1 and designed to be fed from left, being turned by a pulley 2. As shown best in Fig. 2, the rotatable scalping screen is mounted at the apex of a pyramidv formed by two screen members 3 and 4 which incline downwardly and outwardly from the said scalping screen and which are designed to be fed thereby. The scalping screen is preferably located within a hopperlike structure 5' having a funnel chute 6 and a central gate 7 adjustable to varying positions as indicated in Fig. 2 and provided with means for locking in adjusted position. This means may take the form of an arcuate slot 8 from which a threaded pin 9 extends for the reception of a clamping nut 10.

The screenelements 3 and 4 may be of duplicate structure and each comprises a sharply inclined chute 11, a comparatively fine screen 12 and atop cover 13. For successful screening with a screen of this type,

it is necessary that any vibrating action result initially from blows applied to the upper side of the screen. Prior dev1ces have accomplished this but the vibrator elements used have been mounted upon the cover of the screening elements and have produced certain material drawbacks which are obviated by my invention.

The particular form of vibrating mechanism used by meis illustrated in Fig. 2 and,

is shown best in Fig. 8 and comprises an vac inner pipe'll bilurcated at its lower end tor the reception or a roller i8. llt will be understood that this pipe may be replaced by a solid rod but that in the present instance it is formed of a lower part and an'upper part connected by the sleeve yi9 into which they are passed. rlhe upper part is held in place by va set screw while the lower part is threadirom y, rotating by a set,

ed and prevented screw 2l. rllhe pi e or rod i7 entends upwardly throughl tlie bottom oi chute, the screen, and the cover oi the screening elenient and carries a hammering head 22 which is in the forni` oi an annulus threaded onto the pipe 23/ and having its upper edge rounded as at 2d. By loosening the upper :set screw 2O the upper section or the pipe' with hammer can be lifted out when necessary..

'lhe sleeve 19 is formed at its upper end with an lfshaped 'hangs structure 25 within which rests a coil spring 26 designed to bear at its upper end against the rein-foraines4 structure 27 connected to the bottom ll or the chute. @n the upper surface or this botn tom, there is a socket structure 28 into which the pipe casing 29 is threaded. 'lhis sleeve or pipe casin.' 29 concentrically surrounds the pipe or ro i7 and has a collar 30 adgustahly threaded upon its upper endv wlor the support of a coil spring 3l whose upper end in turn bears against the screen l2.

@n the upper surface or the screen l2 is a second soclret 33 which receives the pipe 32. This pipe has a collar 35 threaded upon its upper end havinoan il..shaped flange structure 36 containing a wooden anvil block 37. rthis liz-shaped flange structure rounded at its surface to permit raising or f lowering oi the cover 13 without interi-lerence, this cover i3 being provided with opertures 38 Jfor each vibrator.

ln operation, material to be screened is fed into the smaller end or the revolving screen and the rotation of this revolving screen together with its gradually increasing diameter serves to leed and screen the material until its relatively hner articles pass to the supplemental screen e ements while its coarser particles are delivered troni its larger end in any suitable manner. rlhe material which is passingto the screening elements 3 and i is divided as desired by adjustment oit the gate 7 and alter passing troni such gatetalls yonto the screen 12 over which it e, dmutates. The hner particles separated hy the screen l2 drop to the bottom of chute l1 while the tailings are delivered at the lower end oi the screen. rEhe gravitation or this material is accelerated by ,the action or the vibrators, which serve to prevent the screens from cloggin These vibrators are continuously actuate by their cams against the tension oi their

springs

26 and 31. The result 1s that both the bottom ll and the screens 12 are vibrated through downwardly directed blows of the head pieces or hammers 22 upon the anvils 37. At the same timethe cover 13 isunencumbered and may be lifted with great ease tor cleanin oi the screening elements which, in col weather may be required once a day or oitener when operating onfclay or other plastic material. It will be understood that other screens may bc utilized in addition to the screen l2 and that my improvement will still be applicable thereto. lt will also be understood that only one ot the screenmg elements need be used and that the other screening element may be removed or may be disconnected by the gate 'Z'.

@ne of the important eaturesof my invention is illustrated by a reference to that type or machine wherein superposed scalpnip; and hue screens are fed by a rotating screw. My device is en improvement upon this in the sense that it accomplishes hyl two elements what the other device accomplishes by'three. The rotating screen in question 10o not only serves to :leed the material but has a screening action upon it equivalent to the screening action 'oil the normal scalping screen and, furthermore, the material being fed has no chance to ehehe up the rotating 105 screen because or its constant presentation otnew surfaces and an inversion or the old.

Summarizing, it may be stated that l have provided a screening machine wherein the material to be screened is delivered to a rolle tatable'sc'alping screen. rllhe material passes in. one end oi: this screen and the coarser particles thereota are delivered from the other end, this being brought about by the gravitation et the material from the smaller end to 115 the larger end ol the screen. The result is that the scalping screen serves very ederatually as a ieedin "device and is; nevertheless, in such a position that the ner screens o-E the machine are' readily accessible lor 120 cleaning. lt will be noted that my device is such that'each rotatable scalping screen feeds a plurality ol screens, this feeding action being1 regulated by a ate valve. ln

addition, the vibrating mec anism is such 125 that the liner screens are subjected to a series of percussive blows upon their upper surfaces while the operating mechanism for. these vibrators is below the screeningI machine,

leaving the cover or the screening machine ist) unencumbered by weighty parts. These are some of the principal features of my invention and they, in conjunction with other features, will be vset forth in the appended claims.

Having thus described my invention, what l claim is:

1. Screening apparatus comprising a screen, means for percussively vibrating said screen by blows upon the upper surface thereof, and mechanisms for operating said means by apparatus beneath said screen.

2. Screening apparatus comprising a screen, a cover for said screen, means for percussively vibrating said screen by blows upon its upper surface, a mechanism for operating said vibrating means, said cover being independently mounted.

3. Screening apparatus comprising a chute, a screen in said chute, a cover for said chute, percussive vibrators for hammering said screen from above, said cover being capable of elevation without said vibrators.

4. In screening apparatus, a chute, a screen, mechanisms for imparting vibrating movements to the wire-cloth screen by vlight rapid impact blows upon the upper side of the screen, and means underneath the bottom of the fines chute for operating said mechanism.

5. n screening apparatus, a chute, a

screen, and a cover for said chute, multiple rods .having caps on their upper ends and extending through the chute, screen and cover, anvils connected to said screen and chute for transmission of hammer blows froinsaid caps, and means for rapidly reciprocating said rods. 6. ln screening apparatus, a screen, multiple rods extending through said screen, hammer caps on said rods, and operating cams contacting with lower end of said rods, an anvil element connected to said screens to receive and transmit successive blows from said hammer caps.

7. l'n screening apparatus, a screen, multiple hammer rods extending through said ,aar

screens, hammer caps on said rods, a socket coupling on lower end of each of said rods, a coil spring around each rod and supported in each socket of each coupling, a short rod extending below said coupling, a roller upon the lower end of each short rod, and rotating cams cooperating with said rollers to successively lift and drop said rods, the movement of the rods compressing the springs, the release of which helps to bring the rod back to its normal position.

8. In screening apparatus, a chute, a screen, a cover, rods with caps on their upper ends and extending through the cover chute and screen of the apparatus, a cou- -pling on the lower end of each rod, said couplings having sockets for the reception of coil springs, coil springs embracing said rods and resting in said coupling sockets, said coil springs pressing against the under side of said chute, a short rod extending into said coupling and connected thereby to said first rod, rotating cams operative to lift said rods aga-inst said coil springs, pipe casings around said rods in two sections, the upper section of the bottom secured to the upper side of the screen, said upper section having an annulus filled with wood to serve as an anvil, the lower section of said pipe asing being fastened at its lower end to the upper side of the chute, an annulus upon the upper end of said lower section and forming a spring socket, a spring in said last socket coiled around the casing and pressing at its upper end against the bottom side of said screen, the movement of the spring under the impact blows of the hammer on the anvil connected to the screen by the casing serving to accelerate the vibration of the screen.

In testimony whereof hereby afiix'my signature.

- wiLLAan D'. RICHARDSON.

Witnesses:

FERDINAND H. BINGENHEIMER, R. P. Garner.