US1478266A - Ash sifter - Google Patents

Description

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J. sToREY Dec. 1 8 1923.

ASH SIFTER Filed March 8. 1925 g1/wanton v Patented Dec. i3, 1923.

' naar sra-"ras JACOB STOREY, OF BERLIN, NEJV HALEPSI-IIRE.

ASH SIFTR.

Application filed ll-Iarch 8, 1923. Serial No. 623,753.

"" bodiment in ash sifters, 'although not of necessity limited thereto. 4

The invention has for an object the provision of a novel and simple form of sifter which is eiiicient in operation, a further object relating to the provision of means for varying the movement given the sifting element. j

For further comprehension Vof the invention and of the objectsand advantages theref of, reference will be had to :the following description and accompanying drawings, and to theappended claims in Vwhich the various novel features of the invention are more particularly set forth.Y

Fig. 1 of the drawings v'is a lplan view of my improved sifter, the hinged cover being thrown back.

Fig, 2 isa longitudinal vertical sectional view 'taken generally along the line 2-'2 of Fig. 1, but with certain additional inner parts shown partially in section.

Fig. 3 is 'a transverse Vsectional viewof the sifter, taken along the line of Fig. 2.

Fig. 4 is an kend View.

As here embodied my improved sifter comprises an elongated rectangular lbox or casing 1 0 which rests upon the ground or Hoor and which is closedon all sideseXcept for entrance and discharge openings for the ashes. The top of the casing is formed by a cover 10L hinged "at one end 'as at 10b and having adjacent the opposite end thereoffan entrance opening with which a hopper 12 registers. Extending transversely of the box just below this opening is a roller 13 which is suitably journaled at its ends in the side walls of the casing and which is provided with a number of projecting pins 14 whose function is to ensure of a continuous discharge of the material in the hopper onto the screening or sifting element.

The screening element is in the form of a box-like structure 16 of lesser dimension in all directions than the casing 10, and whose top and bottom are open, this screening element being suspended fOr reciprocating movement in the casing as will be presently pointed out. Extending across this structure, near the top thereof is a screen 18 which is inclined downwardly from one end, which is in registry with the hopper 12, toward the opposite endu it this latter end the screen stops short of the end wall of the structure 16, leaving" an opening 19 through which the ashes that'have not passed through the screen fall.

Extending the full area of the bottom of the' 'structure is a second screen 20 which is inclined oppositely to the screen 18, and which effects a ysecond screening operation of the material falling fromthe end of the screen 18. The end wall of the structure 16 adjacent the lower end of the screen 2O is formed with a discharge opening 21 for the material which fails' to 'pass through 'this screen, a 'short spout 22 projecting from the member 16 at the bottom of this opening over a second spout 23 carried by the end wall of the casing 10 and leading through an opening 24 therein. As here shown this end wall is provided with a hinged door 25 for access to the interior of the casing and the opening 21 is shown as formed in the bottom of this door.

The material passing through the top screen 18 falls on a transversely inclined partit-ion 28 located between the upper and lower screens in the member 16 and communicating at its lower side with an opening 29 in the side of the said member, the ashes passing through this opening 29 and falling into the bottom of the vcasing yfrom which it may be removed through any suitable door.

The screen element is suspended in the casing as follows: Projecting from the sides thereof adjacent the opposite ends and near the bottom, are lugs 32 to which are fixed the lower ends of straps 33 whose upper "ends are fixed to transverse bars 34 having pins 35 on their ends engaging in vertical guides 36 formed in longitudinal frame pieces 10. To reciprocate the screening element 'I attach to the end thereof removed from the hopper 12 a forked connecting rod 37 which connects to a crank shaft 40 extending transversely ofthe casing 10 and suitably journaled at its ends in the walls thereof. Upon one end of this shaft 40, outside the casing, is iiXed a pulley 41 over which is looped a belt 42 looped also over a pulley 43 on one of the trunnions of the member 16 and has pivotally mounted thereon a normally inclined finger 51 having a notch 52 formed in its free end adapted to receive the lower edge of said member as the latter nears the forward limit of its movement and cause said member to be lifted. The finger 51 is normally held in position to engage the member 16 by a tension spring 58 connected thereto and holding it against a pin 54 on the bracket 50. The iinger 51 is preferably adjustable along the bracketO-to vary the degree of movementitl imparts tothe screening element, and to this end it is pivoted as at 55 on a block- 56 slidable in a guide groove 57 in said j bracket and having threaded into one end thereof a screw 58,Y swiveled in the said bracket, this screw having ahead 59 pro- Y block is moved longitudinally. 35"

jecting from the casing whereby it may be rotated to move the bloclr 56. Threaded upwardly through the free end of the finger is a screw 51 which is adapted to be adjusted upwardly and downwardly as the As will be apparent,- when member 16 engages in the notched end of the kfinger 51 it tends to swing the finger on its pivot 55, the end of the finger moving in an obliquely upwardv direction and causing the end of the screen to be lifted, the pins at this end of the screen moving upward in the guides. 36.v

When the block 56 is adjusted along the groove' 57 the angle of inclination of the finger, as 1t rests on the pin54, is varied and in consequence the amount of upward movenient imparted to the screen is varied, while by adjusting the screw 51 the latter is positioned to engage and lift the screen as soon vas the vertical element of the fingerV end is engaged by the member 16.

While I have illustrated and described a preferred embodiment of my invention it will be understood that I do not limit-myself to the precise construction herein disclosed, and that various changes and modifications might be made therein withoutV departing from the spirit and scope of the invention as defined in the appended claims.

I'Iaving thus described my invention what I claim as new and desire to protect by Letters Patent of the United vStates is as follows: A

1. A sifter comprising a casing, a screening element suspended therein, said screening element consisting of upper andlower screens inclining in opposite directions, and means for reciprocating said screening element, and a transversely inclined discharge partition interposed between the -upper and ylower screens, said screening element including a box-like structure having Vdischarge Vopenings respectively in one side and end thereof, for the purpose specified.

2. A sifter comprising a casing, a screen- Ving element suspended in said-casing, means for reciprocating said' screening element, and means for giving said screening element a movement transverselyl to its reciprocatory motion, said means comprising a normally inclined pivoted finger adapted tobe engaged by said screening element.

movement transversely to its reciprocatory motion,y said means comprising a normally'fff inclined pivoted finger adapted to be engaged by said screening element, and pin and spring means for holdingsaid finger in ment.

In testimony whereof I have affixed my signature,

JAooB sroanv. Y

, position to be engaged by said screening elen

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