US227487A - Sifter for ashes - Google Patents

Description

NITED STATES PATENT OFFICEe J. HERBERT CHASE, OF CAMBRIDGE, MASSACHUSETTS.

SIFTER FOR ASHES, 80C.

SPECIFICATION forming part of Letters Patent No. 227,487, dated May 11, 1880.

' Application fnea February 19, issn.

To all whom it may concern Be it known that I, J. HERBERT` CHASE, of Cambridge, Middlesex county, and State of Massachusetts, have invented a certain new and useful Sitter for Ashes, Ste., of which the following is a specification.

This improved sifter in substance consists of two end or head pieces joined together by two sieves, leach of which is of a semicircular shape in cross-section, and both are arranged in relation to each other and to a common central line or axis of the two heads for the edges of the one sieve to pass by the edges of the other sieve, leaving a space or opening between each of such overlaps, and with the center of each semicircular sieve eccentric to the central axis of the heads, which axis is the longitudinal axis of the cylinder, as it were, made bythe said two heads and the said two arc-shaped sieves, arranged as aforesaid, and about which axis tl e said cylindrical sieve revolves, traveling through a vertical plane.

It also consists in the combination, with the above, of a ilat sieve arranged in an inclined position below the said cylindrical sieve, and which in such arrangement, if desired, is adapted to be removed and inserted at pleasure, all substantially as hereinafter described.

In the accompanying plate of drawings my improved sifter is illustrated, Figures l and 2 being central transverse vertical sections of the same, showing the cylindrical sieve in the one position for receiving the material to be sifted'by it and in the other position for discharging the material remaining in the sieve after the sifting operation has been carried on to the extent desired; Fig. 3, a plan view of the cylindrical sieve with the box or casingin horizontal section; Fig. 4, an elevation of one end of the casing or box, and Fig. 5 a sectional view :in detail.

' In the drawings, A represents the cylindrical sieve. This sieve is composed of two head or end pieces, B B, joined together by two sieves, C C, each of a similar semicircular shape in cross-section. These sieves are secured to the head-pieces, and each sieve` has its center at one side of the central line of the longitudinal shaft D, but ,on opposite sides thereof. The shafty D joins the two headpieces, and the edges a. of the one sieve pass by and overlap the edges b of the other sieve, leaving a space or opening, d, between such overlapping portions in each instance.

The central shaft, D, passes through the head-pieces B B, and by such projectingparts the cylindrical sieveA is suspended in a horizontal position in bearings of a box, E, incasing the said cylindrical sieve and other parts making up this improved sifter, as will hereinafter appear.

F is a crank-handle on one end of the shaft D, for convenience in turning it and parts attached to it, as aforesaid.

Gr is alat wire-screen having meshes or openings f', and attached to a frame, g, which is secured within the casin g or box below the cylindrical sieve A, and so as to incline from one side under this sieve G is a chamber, J, for receiving whatever passes through its meshes.

K is an opening in top of box, and L a lid for closing the same, which opening is on the opposite side of the box tothat having the spout H.

The use of the above-described sifter is as follows: First, bring either one of the openings between the overlapping edges of the two sieves to the opening at top of box, and, holding the cylindrical sieve there, then pour into such open end the material to be sifted, and when this is done rotate the sitter in the direction of the arrow M. (Shown in Fig. l.) As this rotation proceeds, obviously the material placed in the sifter passes and rolls down and over the sieve C as it passes upward, sifting the same as it passes along, when, reaching the edge bof such sieve C, it falls over the same upon theother sieve C, and over it it rolls until it reaches its edge b, when it falls from such sieve upon the sieve it was first put upon, and so on as long as such rotation of the sifter is continued. By this means the material is sifted-that is, it is relieved of such portions as can pass through the meshes of the sieve-and in such sifting operation the material being sifted is givenl from time to timeas, for instance, once in every half-revolution of the sifter--a tumble or fall from one sieve IOO to the other, which obviously is advantageous, as it secures a most eii'ective agitation oi' the material while undergoing` the sifting operation.

Having thus accomplished the sifting of the material placed in the sieve A, as aforesaid, to discharge the material then remaining in it, trst bring the sieve to the position at which the sifting operation was begun, and then rotate the sieve in the opposite direction until the uppermost edge of the seinicircular sieve, then in the lowest position, reaches the side ot' the box having the discharge-spout, when, as is obvious, the material on such sieve neces sa rilyescapes and falls upon the inclined sieve, passes over that, and escapes at thc spout.

N is a spring-stop secured to outside ot' casing E in position io make a stop for the crankA handle F ot" the sifter when the siiter isy to be charged with the material, as aforesaid. This stop yields to the swing of the crank in the one direction to sift the material within the cylindrical sii'ter, as aforesaid, and thus does not interfere with such movement ot' the sifter, while in the movement of the sifter in'the 0pposite direction, to discharge it, it can be readily placed out ot' position ot'interierence with such movement ot the sifter.

The lower and inclined sieve obviously increases the eiciency of the sifting operation, and in lieu ot' being arranged in an inclined position it may be in a horizontal position; but it is preferable to have it inclined, as it then secures an automatic delivery, as described, ot' all that falls upon it and does not pass through it. This inclined sitter, as shown in Fig. 2, is arranged so as to be slid in and out oi' guides or ways in the sides of the box or casing, and thus, if desired, a plain board may be inserted in place of it, or the space covered and embraced by it when it is Within the box may be left open, if so desired, by simply drawing it out, and also this sifter canineline to either side, as desired, and in such case the spout H can be correspondingly changed.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A cylindrical sii'ter horizontallyhung in suitable supports and composed of two sieves, arc-shaped in cross-section, which are arranged eccentrically to the longitudinal axis of the sifter, and so as to overlap by their edges, with spaces or openings between them, all substantially as described, and for the purposespecitied.

The combination, with a cylindrical sifter horizontally hung in suitable supports and composed ot' two sieves, arc-shaped in crosssection, which are arranged eccentrically to the longitudinal axis of the sifter, and so as to overlap by their edges, withI spaces or open ings between them, of an inclined sieve, which is placed below such cylindrical sitter and otherwise arranged in relation thereto, all substantiall y as and tor the purposes specified.

3. rlhe cylindrical sifter having two arcshaped sieves, C G, and an inclined sieve, G, in combination with a suitable box or casing, E, all substantially as herein described, for the purposes specified.

J. vHERBERT CHASE.

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