US1729965A - Screening apparatus - Google Patents

Description

Octrl, 1929. 7M. r REYNOLDS 32 9 S CREENING APPARATUS Filed May 22, 1926 INVENTOR.

ATTORNES;

MoflgyPunshsn Reynolds.

Patented 0a. 1, 19 29 UNITED STATES.

OFFICE- MORLEY PUNSHON REYNOLDS, OF CLEVELAND HEIGHTS, OHIO, ASSIG'NOR TO' THE W, S.

I TYLERCOMPANY, 0F CLEVELAND, OHIO, A CORPQRA'IION OF OHIO SCREENING APPARATUS Application med May 22,

The present invention, relating, as indicated, to screening apparatus, is particularly diT rected to an improved screening apparatus for use in screening damp materials, such as ore, or hard abrasive materials such as coke, which exerts an extremely severe abrading action on the ordinary screen. A further object of the invention is the provision of screening apparatus which shall be capable of a long life under the conditions noted, especially applicable to the coarser sizes, and a suiliciently accurate and rapid separation without any tendency to clog or blind which reduces the capacity of the screen.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims; the annexed drawing and the following description setting forth in detail certain mecha nism embodying the invention, such disclosed means constituting, however, butone of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing Fig. 1 is a side elevation more or less diagrammatic in character of my improved screen mounted in an inclined screening apparatus Fig. 2 is a transverse section through my im roved screen; Fig. 3 is a partial longitudinal section; and Fig. 4 is a partial transverse section.

Referring now to Fig. 1, there is shown an inclined box-like casing 1 of usual construction, within which the screen proper is mounted, also in an inclined position, the material to be screened being fed into the casing and onto the upper edge of the screen by any suitable means and with the material passing down over the screen surface, the undcrsize material passing through the screen and the oversize material over the screen, and both being discharged through suitable chutes at the lower end of the casing. Itis not considered necessary to describe in greater detail the general character of the machine, as this is of standard construction and is well known.

My improved screen consists of a series of transverse rods or bars 2 mounted in longitudinally extending frame members 3 and a 1926. Serial No. 111,064.

second series of longitudinally extending rods or bars 4:, .whichat their ends have turned down portions 5 which engage in transverse end plates 6, the end plates and the side members 3 being suitably connected together to provide a frame for the entire screen. The transverse rods 2 and the longitudinal rods 4 lie in difierent parallel planes, the upper longitudinal rods contacting against the transverse rods at their intersections.

Secured to the series of transverse rods 2 are vibrator strips 7 and 8 of suitable resilient material which lie between the central pair of longitudinal rods 4 and extend the entire. length of the screen. vibrator strips 7 and 8 are the lower end portions 9 of a bracket 10, which extends upwardly from the screen (see Fig. 1), where it is connected to the armature 11 of an electro-magnetic vibrating apparatus 12 adapted to vibrate the armature, and through it the vibrator strips and screen at an extremely high speed. The construction of the illustrated electromagnetic vibrating device is fully described and claimed in my co-pendin'g a plication Serial No. 285,953, and in U. Letters Patent No. 1,479,834 and serves to illustrate a preferred form of vibrating device in connection with .the present embodiment of this invention.

In Fig. a I have shown a modification of, the screen in which the lower transverse wires 15 are crimped slightly opposite each longitudinal wire 16, and the twosets of wires are disposed so that the longitudinal wires. rest in the recesses formedby'the crimping in the lower wires or rods. The orimps in the lower bars are of suflicient depth to permit about one-half of the upper bars to rest therein.

The advantages of my improved screen are particularly important in connection with the handling of such materials as coke, which is extremely abrasive and which has a marked tendency to clog in the openings. Particles of coke are oblong in shape and readily be come wedged in the openings of an ordinary screen. The present screen has been found to operate without clogging of these openings because of the slightly lateral movement of Also secured to the the bars, which are held only at their ends and which, even when partially engaged with each other, as shown in the construction of Fig. 4:, have a sutlicient lateral movement to free the coke or other material from the openings. A further advantage of the present screen is that larger rods or .wires can be used than in woven screens, and hence the 7 life of the rods is considerably longer under the severe abrasive conditions that are met with in handling substances'like coke.

A further advantage of the present apparas tus is that a very severe-vibration can be maintained, this vibration passing to all of the transverse wires through the vibratory strips 7 and 8, and the movement of these wires or rods in turn vibrating the longitudinal wires, but at a different rate of vibration,

so that there is a continual jarring. or slap:

pin of one set of rods upon the other, whichpro uces an extremely rapid and effective other series of rods. a 3. In screening apparatus the combination passage of the material through and over the screen. Because of the relative freedom of the rods to move laterally it may be said that Y the present screen affords a double vibration,

that is, a vibration up and down and also a lateral vibration of all of the rods and of the meshes of the screen itself, thisvibration being, in addition to the jarring or slapping action, effected by vibrating but one of the] two sets of rods and allowing that set to continigally strike against and jar the other set of Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention"? 1.- In screening apparatus'the combination of a frame and an inclined screen mounted therein, and consisting of a series of transversely disposed equidistantly spaced vibratory rods, each rod being provided with a of a frame and an inclined wire screen mounted therein and conslstlng of a series of transversely disposed spaced rods, and a second series of longitudinally disposed spaced rods vmounted in contact with the upper surface of said transversely disposed rods, and means including resilient elements secured to said transverse rods and extending the entire length of said screen for directly vibrating said transversely disposed rods.

4. In screening'apparatus the combination I of a frame and an inclined screen mounted therein, and consisting of a series of transversely disposed equidistantly spaced rods and a series of longitudinally disposed equidistantly spaced rods in contact with said first named series of rods, and means vibrating 'pne of said two series of rods, said vibrations being adapted to cause the vibration of the other of said series of rods. 5. A 1 screen comprising a rectangular frame, a series of equidistantly spaced vibratory rods disposed transversely of said frame and said rods being secured therein at their ends but being free of constraint between theirends,each rod being provided with a series of recesses in one surface, and a. second series of vibratory rods disposed longitudinally of said frame, said second series of rods being also secured at the ends in said frame but bein fre of constraints intermediate their an s, and said two series of rods lying in spaced but parallel planes and said longitudinal rods frictionally contacting the recessed surfaces. of said transversely dis posed rod.

6. A screen comprising a rectangular frame, a series of equidistantly spaced vibratory rods disposed transversely of said frame and said rods being secured therein at their ends but being free of constraint between their ends, and a second series of vibratory rods disposed longitudinally of said frame, said second series of rods being also secured at the ends in said frame but being free of constraints intermediate theirc ends, and said two series of rods lying in spaced but parallel planes and said longitudinal rods frictionally contacting against the upper surfaces of said transversely disposed rod, and said two series of rods constituting a screen and being capable of slight lateral movement and the rods in each series being capable of slight lateral movement with respect to each other when said screen is placed under vibration.

Signed by me this 19 day of May, 1926.

MORLEY PUNSHUN REYNOLDS.

(ill

Images