US1756835A - Fertilizer-screen vibrator - Google Patents

Description

April 29, 1930. J. SACKETT 4%51 I FERTILI ZER S GREEN VIBRATOR Filed April 16, 1929 2 Sheets-Sheet i April- 29, 1930. r A, J; S CKETT 1,756,835

' FERTILIZER SCREEN VIBRATOR Fil ed April 16, 1929 2 Sheets-Sheet 2 Patented Apr. 29, 1930 UNITED STATES- PATENT or fice AUGUSTUS J. SACKETT, QFiA'NlqErAkUNDEL COUNTY, MARYLAND, ASSIGNOR TO THE A. J. SACKET'I AND sons COMPANY, A CORPORATION or MARYLAND FERTILIZER-SCREEN V'ITBR'ATOR Application filed April 16, 1929. Serial No. 355,462.

The inventionrelates to screensof the type used in the grading or screening of groundor comminuted materials, the apparatus to which the invention is applied being particur larly adapted to the treatment of fertilizer materials, though it is alsov-ac'lapted: to use in; the grading orscreening of various materials as sand, lime, ground-shell or the like. The screen to which the invention is applied is ofv'the-rotary'oroscillating typeaa-nd preferably of arcuate or-cylgindnical form. I p

In the screen-ingoperation the meshes or screen apertures are in. the treatment of the majority of the "materials handled, subject to partial or complete clogging by the retention therein of an accumnlati'on'of fine-dust or of particles which fit or nearby fit the screen or less familiar in the various branches of the screeningart. The majority of'these vibrating devices are comparatively complicatedand-imlifned to get; out of; order so that 15 they require attention from time to time-and many OfllllOSQ which are effective are high speed motor driven. vibrators which their operation'consume'an amount of power which is a considerable proportion of that required 7,") ii -the main operation of the machine i. a,

in rotating or oscillating the screen and feed-- ing the 'material when and if i t-is fed auto matically.

' The invention felatGSvtO the provision of a vibrator for a-frotating or oscillating screen of simple, and substantial construction which can be prfodiiced {cheaply and which isinot apt-to get-out o f o-rder andwhich atthe same time is operated-Without the expenditure of any 1c wer ---in;add-itijonto that required "to rotat-e or oscillatethieiscreen.

Inthe accompanyingdrawing; 1 haveilllls trateda fertilizer screen embodyingtlie feae 131513 95? ef-niy I inventionin the pll-eifiellled 91a 'thedrawings;

Figure '1 is a perspective view ofa fertilizer screen of the rotary oroscill-atory'type, one of the trays or sections being removed to disclose the vibrator with: which it is equipped.

Figure 2 is a side elevation of a, screening machine assembled for operation.

Figure3 is an end view of the screen cylinder showing one of the spiders comprising the screen frame and'the vibrators cooperatingtherewith.

Figure 4: is an elevation on an, enlarged scale of one of the vibrators removed, the same being taken in the direction of Figure 3, and

Figure 5 is'an elevation of the same vibrator taken at right angles to Figure d.

Referring to the drawings by numerals each of which is used to indicate the sameor similar parts in the difi'erent'figures, the apparatus illustrated comprises a screen member 1 in the form of a container of fora-minous material 2, as wire mesh onscreen cloth, though any variety of foraminous-material maybe used. This screenmember leas shown is cylindrical in form though it may be of any convenient shape and mountedon as'haft 3 by means of which it may be rotated: or oscillated in any suitable manner, the supaortin frame and ear connections .bein

b C L71 obvious and'well known in-the'art and form ing no part of the present invention. The screen shown has a normal speed of about twenty revolutions per minute, and it may be driven by a large hevelgear 4 on shaft 3, which bevel gear 4 is engaged by a smaller bevel gear 5 driven by a pulley 6 which-Q in its turn, driven by a belt 6", The screen member orcont'ainer 1 iassshown is formed with a feed opening 7 concentric with the axis, i. e. with the shaft 3 through which opening the material to he fat d may he introduced, and h outer wa1 0f he GQntainer r sc e mem er is sho n prising a s rie of sections trays 8, wh ch as shown are of segmental form and supported 1n any suitable and convenient man- 'ner as by means of spiders or radial frame members 9 secured to the shaft 3 and consisting each of a hub 10 most conveniently split as shown, so that it may be mounted on the shaft without passing over the end and provided with a convenient number of radiating arms 11 to the ends of which the frames 12 of the sections 8 are secured in any suitable and convenient manner as by means-of bolts 1% passed through the ends of the arms, 11 and through the frames 12.

In the form of the invention shown, the vibratorsor st ikers to be described cooperate with the spiders or frame members 9 and particularly with the radial arms 11 thereof.

These vibrators may be arranged as to these various details'to suit the conditions in'hand. In accordance with the preferred form shown they consist each of a pendulum-like member 15 including a weight or hammer member 16 and an arm17 to one end of which the weight is secured, the other end ofthe arm 17' being pivotally mounted at 18 to permit the arm to swing relatively to the shaft.

I In the form of the invention shown, each weight is'provided with'two arms 17 (see Figure 5) placed side by side and pivotally connected at their inner ends to splitcollars 19, two of said collars being'in' the form of the invention shown, provided for each spider. These collars 19 are'most fully illustrated in Figures 1 and 3, there beingone of said collars on each side of each hub 10 of each spider. These collars are preferably split for convenience in assemblingso that they need not be passed over the end of the shaft, and as shown, particularly in Figure 3, the halves of each collar are provided at their meeting edges with flanges 20 secured together in mounting the collars on the shaft by means of bolts 21. V Y

The arrangement described, which is shown in side elevation in Figure 5, provides in the instance of each striker or pendulum member 15 a pivotal support for the inner ends of each pair of arms 17 at 18 on each sideof the hub member 10 of the corresponding radial frame or spider 9 so that each one of the weights or strikers 16 is' located in the plane of the radial arms 11 of the frame and between two adjacent arms 11 so that it can swing into contact with either and from one to the other, its path of oscillation being thus limited. 1 In the form of the invention shown there are three of the striker members or elements 15, for each frame member or spider 9 and each of these frame members has six radial arms 11, and in accordance with the preferred arrangement illustrated, there is one striker element or member 15in every alternate space 22 between'the' radial arms 11 though this number and the arrangement of the spider and other details may be varied to suit the requirements and there are preferably a plurality of sets of striker members or elements, one cooperating with each radial frame or spider 9. r

In the operation of the machine, the screen container 1, is driven in any suitable manner. In accordance with the normal operation of the machine illustrated, the screen member 1 is driven in rotation at a speed which may be described in round numbers as approximating twenty revolutions per minute for the six foot cylinder. While the speed is not primarily essential, the device of the invention operates most efficiently with a slow motion of the screen, particularly when the screen is driven in rotation.

With a slow motion of the screen as described, the striker members 15 are operated mainly by gravity cooperating with the motion of the screen so that the weights 15 strike against the radial members 11, each of said members 15 being operated to give two such strokes or blows for each revolution.

Assuming that the cylinder rotates in a right handed or clockwise direction as seen in Figure 3, the cycle of operations of any one of the striker members 15 is as follows, taking for example the member 15 which is hanging downwardly in vertical position in Figure 3. As the cylinder rotates, this member 15 is carried upwardly and tothe left by 'the arm'll of the spider with which it is shown in contact until it passes'the top center and becomes overbalanced on the righthand side of the pivot 18, at which time it swings downwardly and tothe right away from said arm 11 as illustrated in dotted-lines in Figure 3, there being no striker'member occupying the position, relatively to the other strikers shown of the one shown in dotted lines in this figure. At the end of the stroke the middle point or substantially the middle point of which is illustrated in Figure 3, in dotted lines, the weight 16 comes in forcible contact with the radial arm 11' below the striker 15 as shown in dotted lines, imparting a correbottom center position. It will be understood that at this time the striker member 15 is on the right hand side of the corresponding radial arm 11, i. e., on the rear side in the direction of rotation. After it passes the lac bottom center and moves upwardly and to the left through a certain are its slight momentum and inertia being overcome by the force of gravity, it swings backwardly in lefthanded revolution toward the next radial arm 11 in this direction. It will be understood that at the same time this radial arm 11 to the rear of the weight moves forwardly in right handed rotation so that the rearward motion of the striker member and the forward motion of the radial arm 11 of the spider are combined to bring these two members in contact and effect a secondary blow or stroke of less magnitude than that accomplished by the same striker immediately after it passes the top center.

The operation of each of the strikers is identical with that of the single striker as just described so that each striker comes in contact with the spider twice in each revolution, giving it a cycle of operations comprising a primary stroke, blow or vibration and a secondary stroke of less magnitude than the primary stroke. In this way with the cylinder rotating at a speed of twenty revolutions per minute which has been assumed for example and each spider being equipped with three strikers, which number has also been assumed for example, the strikers cooperating with each spider will give one hundred and twenty blows or vibrations per minute. For convenience of illustration and to show that there are normally a plurality of sets of strikers cooperating with a plurality of spiders in each cylinder, the present apparatus is shown as equipped with two spiders each cooperating with a set of three strikers so that operating as described the vibrating 7 elements will produce two hundred and forty vibrations perminute, eliminating any and all tendency of the apparatus to become clogged by accumulation of material in the screen apertures. It will be further noted, as already pointed out, that theoperation of the vibrator is incidental to the operation of the rotary screen requiring no additional power and that it is further of simple and cheap construction and practically incapable of getting out of order.

I have thus described specifically and i detail an apparatus embodying the features of my invention in the preferred form in order that the nature and operation of the same may be fully understood. However, the specific terms herein are used descriptively rather than in a limiting sense, the scope of the invention being defined in the claim.

hat I claim as new and desire to secure by Letters Patent is:

The combination in a fertilizer screening machine of a rotating cylinder having walls of foraminous material, the cylinder having a central shaft and radiating spokes supporting the foraminous material, a flange sur rounding the shaft on each side of the spokes of one set and a plurality of swinging pendulumlike weights each located between two adjacent spokes, a pair of arms supporting each of said Weights, one on each side ofthe spokes and immediately adjacent the same,

each said arm being pivotally mounted at one end on one sa d flange whereby each weight is permit-ted to swing in the plane of the AUGUSTUS J. SAGKETT.

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