US1353545A - Separator - Google Patents

Description

T. J. SYURTEVANT.

v SEPARATOR. APPLICATION FILED JUNE 9.1917.

1,353,545, PatentedSept. 21,1920.

3 SHEETS-SHEET I.

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T. J. STURTEVANT.

SEPARATOR. APPLICATION FILED JUNE 9, I917.

Patented Sept. 21, 1920.

3 SHEETSSHEET 2- T. 1. STURTEVANT. SEPARATOR.

APPLICATION FILED JUNE 9, I917.

1,353,545B I PatentedSept. 21,1920.

3 SHEETSSHEET 3- barren stares smear oss-rea THOMAS J. srunwnvnnzr, or WELLESLEY, iaassacnusnrrs,nssisnon To. s'ruRrE- vans MILL comrnlvy, or sosron, vrnssacnusn rrsg A, conromrrolvo'r MASSA- CHUSETTS.

' passing through one will be-further graded by the other. It is desirable from time to time to have ready access to the screens for purposes of cleaning, replacement and repair of parts thereof. 1 An object of the invention is to provide simple and effective means for supporting the screens, so that.

ready access may be had thereto.

Another object is to provide means for yieldingly supporting the lower screen in the casing.

It is customary to percussively vibratethe screens by means of hammers which strike pins which in turn act on the screens. The hammers strike the pins variably according to their speed and relation tothe pins, and it is found they produce an objectionable wear thereon ultimately formingchamfers on the tops of the pins. This wear on the pins is not only objectionable, but also the pins tend to rotate and present their chamfeis at such an angle with respect to the hammers, that they are liable to cause the latter to glance from the ends of the pins.- Consequently, the pins may not receive the full effect of the blow required,

Another object of the invention toprovide means for protecting the tops or; the

. pins from the wear referred to, and insuring successive, equal blows of the hammer thereon; v

Still another object ofthe invention is to provide the sockets on the screens receiving the pins with passages permittingthe material 'to be graded to flow therethrough, thereby increasing the effective-area of the screens. 1 The character of. the. invention will be best understood by. reference to the follow- Specification of Letters Patent.

Application filed June 9,

i917. Serial No 173,784.

ingudescription of one good form thereof,

shown in the accompanying drawings, where1n:,

Patented Sept. 21,1920.

Figure l is a vertical section through a I separator shown hereinas embodying the invention;

, Fig, 2 is a ,transve-rse' section taken on line 22 ofFig. 1;

Fig. 2 is a perspective detail view'of the upper screenbrackets and the, hanger stops for limiting movement of the screen longitudinally of the cover,

' Fig. 3 on an enlarged scale is a perspective view of spring means for supporting and limiting the movement-of the lower screen; r

Fig. 4 is a perspective view ofa pin socket showing its passage permitting thematerial to be graded to flow beneath the socket; v, Fig.5 on an enlarged scale i a perspective view of the mechanism forpercussively ,jarring the screen;

Fig. 6 on an'enlargedscalevis a front elevation of a portion'of the bracket supporting the member for relieving the topof the hammer actuating pin from wear; v a

Fig. 7 is a rear elevation ofparts shown in Fig. 6; and Y Fig. 8 is a plan :of. the wear reducing member showing the same in operative and.

inoperative positions. v

Referring to the drawings,the-separator shown therein as embodying the invention comprises a frame 1 (Fig. 1) supporting an inclined'casing having a bottor'n35, sides 7 and a cover 9 connected by hinges llwith.

the top. of the casing. This cover is adapted to be swung upward'on said hinges to furnish access to the interior, of the ,casin'gi as more fully hereinafter described, and when closed its lower end rests on an angle bar 13 v Xtending transversely of the casing.

The casin may contain one or more screens for grading materials. In the pres ent instance of the invention, .an'upper coarse or scalper screen and a lower fine screen are shown. The upper screen comprises. coarse screenclothing 15 stretched on a frame consisting oftransverse angle bars 17 connected to longitudinal angle bars 19.

It is desirable to support the upper screen from the cover of the casing, sothat the screen may be lifted out ofthe casing on the opening of the cover, and so that the screen may be desirably vibrated as more fully hereinafter described. To accomplish this, the screen is connected to the cover by hangers shown herein in the form of plates 21 secured to angle bars 23, secured in turn to the under surface of the cover. Rests, conveniently in'the form of angle bars 25 are and depend from the under surface of the cover and engage the backs of the channel bars to prevent the escape of dust from above the screen into the spaces between the hangers and the sides of the casing.

By the construction described the screen may be very readily attached to and removed from the cover when the latter is tilted to its open position. To insert the screen it is merely necessary to slide its hooks along the hanger rests until limited by engagement with the upper stops 27. The side bars and hooks have sufficient depth to permit the latter to be raised to escape the lower'stops 29 when sliding into place. Then the channels may drop down back of the lower stops 29, where they will be held from sliding down along the rests. l/gVhen the cover closes the screen is introduced into the casing in its operative position. 7

The lower fine screen comprises screen clothing 38stretched on a frame consisting of transverse angle bars 35 and longitudinal side angle bars 87. Suitable means may be provided for supporting the screen, in the present instance of the invention, Z-bars 39' are provided mounted on the bottom of the casing and spaced inward somewhat from the sides of the casing. Upper andlower leaf springs 41 are provided (Figs. 2 and 3) having ends secured to said Z-bars and upwardly curved ends 48 on which the side bars of the screen frame rest. These springs may have flanges 45 engaging the outer edges of-said side bars to limit lateral movement of the screen, said flanges being preferably bent inward somewhat (as will be noted in Fig. 3) to prevent lifting of said sidebars from said springs. The screen may have transverse channels 47 secured to the under sides of the side bars of the screen to strengthen the latter, and these channels may desirably engage theupper free ends ofthe springs and serve to limit downward movement of the screen. Suitable stops 49 may be mounted on the Z-bars beneath the springs to prevent downward movement of the springs beyond their elastic limit.

To pi'cventmaterial passing through the these pins are seated in sockets 59 secured to the screens and project upwardly through collars 61 on the cover of the casing and I thence upward a substantial distance above the latter. The long pins also project through collars 63 mounted on the upper screen. These pins may be of any suitable material, but preferably are made of wood and are provided with protecting sleeves extending substantially the entire lengths of the pins and leaving portions of the lat ter extending beyond the sleeves short distances from the opposite ends thereof.

The sockets 59 may have channels 6 (Figs. 2 and 4') in the bases thereof to permit the material flowing downward along the screens to pass therethrough. .As' a re sult, the sockets do not substantially deflect the material to the sides of the sockets and the effective screening area is increased.

The sockets may have ports 69 communicat ing with said passages to prevent dust from packing into said sockets and interfering with the proper fit of the pins therein.

Suitable hammer means is provided for striking successive blows on the tops of the pins to vibrate the screens. In the present instance of the invention, the hammer means comprises strikers 71 (Figs. 1 and 5) pivotally connected to short arms 73 on split hubs 75 secured to shafts 77 journal (l inbearings on brackets 7 9 secured to the top of the cover.

One of these shafts has a large pulley 81 (Fig. 1) thereon driven by a belt 83 from a pulley (not shown) on the screw conveyer shaft to be hereinafter described. To drive the other shaft,-sinall pulleys 85 are mounted on the shafts vand are connected by a belt 87.

B the construction described when the shafts are rotated, the strikers swinging freely from the hub arms will be carried around and strike the pins with successive blows, thereby vibrating the screens.

Next will be described means for preventing the objectionable wear referred to upon the upper ends of the pins. To accomplish this, each pin is provided. with a member 89 (Figs. 1, 5 and 8) preferably in the form of a strip of hard steel having a free end interposed between the top of the pin and the strikers. The opposite end, in the presend of the bolt. that the holder ent instance of the invention, is superposed on a holder" 91 and secured thereto by a bridge-bar 93, connected by screw bolts 95 with said holder. The member 89 may extend 'bet weenflang'e's 97 on said holder and along its holder to present different portions thereof-above-the pin as desired. 7 The holder may be mounted on and secured to a bracket 99, fastened on the top of the casing cover, by a bolt 101' having a 'head seated in a recess in said holder and extending a substantial distance beneath the top of said bracket. The bolt has a helical spring 103 thereon confined between the top of said-bracket and a nut 105 on the lower The construction is such bracket.

The wear preventing member may be adjusted to various elevations above the top of the pin to vary the effect of the blow from the strikers thereon, To accomplish this,a screw 107 may be threaded in said bracket and have a head projecting into a recess 109 on the-under face of saidholder. A nut'll'l on the screw locks the same in its different positions of adjustment; T hisde- 'vice will permit the holder to be tilted upward against the resistance of the bolt spring 10-3 to hold the member at different inclinations as desired.

From'time-to time itis desirable to lift thepinup out of its socket and outward through the casing. To avoid interference with the removal of the pin, the wear preventing member may be swung from its full line position "to its dotted line position as shown in-Fig. 8; To hold themember in its operative position and permit itsswinging to its inoperative position, the holder may 'project outward from the spring bolt 101 and presenta projection 113 adapted to enter a depression 115 in the bracket. To swing the we'ar' preventing member to its inoperative position, it is merely necessary to lift the same upward against the resistance of the bolt spring sufiiciently to permit the holder recess 109, to escape fromthe head of the adjusting screw. Then the member is swung laterally, thereby causing the projection 113 to ride up out of the depression 115; After the pinhas been replaced the member maybe swung back to its operative position, thereby causing the projection 113 to'snap into the depression 115- and the holder recess 109'to snap onto the head of the adjusting screw.

It is desirable to varythe force of the blow on the pin for varying conditions. It

"will be apparent that the member willofier more or less resistance to' the blows of the strikers according to the distance it "is adjusted above the pin. This *will furnish The construction isheld yieldingly onto theplemented by variation in the speed of rota- 'tion of the strikers, Obviously, the more rapid the rotation of the strikers, the greater will be the force of the blows given thereby.

serve to prevent wear on the pins, but also contribute to the vibration of the upper screen. This is due-to the fact that when the members are-struck, vibration is trans mitted'from the free ends thereof along the- Y The members described not only'desirably 7 same and through their supporting brackets to the cover ofthe casing, and thence through the-hangersto' the'upper screen.

"Th-us, vibration is directly imparted to the graded into the box. To feedthe material along the box, a screw conveyer 141i is mounted in said-box and has a shaft 143 journaled in bearings in the heads of. the box.

As the material-is fed along the feed vbox, itisadapted to flow over a feed plate 147 adjustably supported by hangers -153 having "theirupper ends connected to the topof the casingextension 117 referred to.

The material flowing over' the edge of the feed plate drops downward through the casing extension onto'a deflecting plate 165, and passes thence onto the upper screen and is graded thereby, The tailings flow" along.

the top of the screen and escape through the outlet 167. The fines passing through the upper screen are further graded by the lower screen, the tailings passing through the outlet 167 and the fines passing through the outlet 171. i v

A door 173 may be hinged to the back of the casing and furnish access to the feed plate and feed box, and a door'l75 may be hinged to the back of'th'e casing'and furnish access to the upper'ends' of" the coarse-and fine screens; r

' 1 It will be understood that the invention 'is not limited to the specific embodiment shown, but that extensive deviations may said frame including fixed leaf springs each having a free'end extending into supporting engagement with the frame, said frame and springs; having means for limiting lateral and longitudinal movement'of the frame relative to the springs, and said frame being removably supported by the springs and free from fastening means between the frame and sprlngs.

2. In a separator, the combination with a frame having screen material stretched thereon, ofmeans to yieldingly support said frame in an inclined position comprising fixed leaf springs each having a free end extending into supporting engagement with the frame, said frame and springs having means for limiting lateral and longitudinal casing having a cover, of hangers depend ing from said cover, a screen supported by said hangers, and dust guards depending fromsaid cover to prevent leakage of material over the sides of said screen.

4. In a separator, the combination with a casing having a cover, of hangers depending from said cover having rests extending longitudinally of said screen, and hooks on said screen mounted freely on said rests.

5. In a separator, the combination with a casing having a cover movable to open and closed positions, hangers depending from said cover, and a removable screen adapted to slide longitudinally of said cover to and from said hangers when said cover is in open position.

6. In a separator,the combination with a casing having a cover movable to open and closed positions, hangers depending from said cover, and a screen having a frame retained by the hangers in spaced substantially parallel relation to the cover and freely removable from said hangers when the cover is in open position.

7. In a separator, the combination with a casing having a cover movable to open and closed positions, hangers depending from said cover, a screen slidable to and from said hangers, and stop means to limit movement of said screen along said hangers.

8. In a separator, the combination with a casing having a cover, of hangers depending from said cover having inwardly deflected members, a 'scalper screen supported by said side plates, a fine screen, means yieldingly supporting the latter beneath said scalper screen, and outwardly deflected members at the sides of said finescreen beneath said inwardly deflected members.

9. In a separator, the combination with a screen, of means percussively to vibrate said screen including pins, and sockets on said screen receiving said pins having passages beneath their bases permitting the material to be screened to pass therethrough.

10. In a separator, the combination with a screen, of means percussively to vibrate said screen including pins, and sockets secured to said screen, receiving said pins and having passages beneath their bases, and ports permitting escape of material from said sockets to said passages.

11. In a separator, the combination with a screen, of means for percussively vibrating said screen including a pin, hammer means. and a member interposed beneath said hammer means and above said pin for receiving the blows of the former and protecting the latter, said member having a free vibratory portion. a

12. In a separator, the combination with a screen, of means for percussively vibrating said screen including a pin, hammer means, and a resilient leaf interposed beneath said hammer means and above said pin to transmit the blows from the former to the latter.

13. In a separator, the combination with a screen, of means for percussively vibrating said screen including apin, hammermeans, and a member interposed between said hammer means and pin and adjustable to vary the force of the blows of the former on the latter.

1 1. In a separator, the combination with a screen, of means percussively to vibrate the screen including striker, a pin beneath said striker and above said screen, and a member for transmitting the blows from said striker to said pin, and having a fixed portion and a free portion between said pin and striker.

-15. In a separator, the combination with a casing, of a screen therein, means percussively to vibrate the screen including hammer means mounted on said casing, a pin between said hammer means and screen, and

a vibratory leaf member mounted on said casing and interposed between said hammer means and pin to relieve the latter from wear, said leaf mounted to be moved laterally to clear said pin.

16. In a separator, the combination with a casing having a cover, a screen supported from said cover, hammer means mounted on said cover, a pin receiving blows from said hammer means, a vibratory member interposed between said pin and hammer means supported independently of said pin, and means to transmit vibration from said memher through said cover to said screen.

17. In a separator, the combination with a screen, of means percussively to vibrate the same including a pin, hammer means for imparting blows to said pin, and means independent of said: hammer means automatically to lift said hammer means after each blow from the position in which the blow is delivered to the pin.

18. In a separator, the combination with a screen, of means percussively to vibrate the same including hammer means, a pin between said hammer means and screen, a ribbon-like strip" extending over an end of said pin, and an adjustable holder for said strip having provision for normally holding said strip different distances from said end.

19. In a separator, the combination with 5 a screen, of means percussively to vibrate the same including hammer means, a pin between said hammer means and screen, a

THO AS J. STURTEVANT.

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