US867670A - Ash-sifter. - Google Patents

Description

Nq. 867,670. PATENTED 00T. 8,1907:I

A. M. NELSON.

ASH SIFTER, APPLIOATION FILED AUGJI. 1905.

UNITED STATES ANDREW M. NELSON, OI" CHICAGO, ILLINOIS.

`ASI-I-SIIETER.

Specication of Letters Patent.

Patented Oct. 8, 1907.

Application filed August Z1, 1905. Serial No. 275,178.

To all whom it may concern:

Be it known that I, ANDREW M. NELSON, a citizen oi the United States of America, and a resident of Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in Ash-Sitters, of which the following is a specification.

My invention relates to sifting arrangements adapted more particularly to separating the unconsumed and but partially consumed coal from the ashes.

Generally stated, the object of my invention is the provision of an improved and highly efficient sitter, and one'adapted more particularly for use in siiting ashes.

Special objects of my invention are the provision of an improved. construction and arrangement whereby the different elements of the siter may have a more compact and elcient relative arrangement than heretofore; the provision of an improved construction and arrangement whereby the sifter will not tend to clog, and may be easily operated, and whereby the same may be easily cleaned or repaired and renovated; and

the provision of certain details and features of con-A struction tending to increase the general efliciency and serviceability of a siiter oi this particular character.

To the foregoing and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a longitudinal vertical section of a sifter embodying the principles of my invention, said section being taken on line l-l in Fig. 2. Fig. 2 is a vertical cross-section on line 2.2 in Fig. l.

As thus illustrated, my improved sfter comprises a suitable box or body A having a drawer or receptacle B for the unconsume'd or but partially consumed coal, and another drawer or receptacle C for the ashes. As shown, the drawer B can be withdrawn from the lower front-portion of the box or body, while the drawer C can be withdrawn from the lower side-portion of the box or body. Within the box, and at a point substantially over the meeting portions of the two drawers, a tilted or inclined screen D is arranged in the positions Shown in Fig. 1,-that is, in such a position that any coal thrown upon its inclined upper surface will roll down and fall into the drawer B, while the ashes will go through and fall into the drawer C. As an upward continuation of the said screen, a movable or swinging screen E is arranged in position with its lower end adjacent to the upper end of the screen D. The said movable screen can be mounted to tilt about a horizontal axis e, and may have side boards or guards e adapted to prevent anything thrown in the said movable screen from falling over the sides thereof. Another movable screen F is mounted to or tilt swing about a horizontal axis f, both screens being connected by cords or other flexible connections f and e2 with the swinging door or cover G. This door or cover is hinged to the top of the box at g, and when down, holds the two movable screens in the position shown in Fig. l. A ledge or incline H is arranged in position to prevent the ashes, when thrown into the siter, from dropping directly into the drawer or receptacle B ,-that is, for deiiectng the ashes onto the screen D. When the cover or closure is opened, and swung into the position shown in dotted lines in Fig. l, the two movablescrecns are thereby lowered into the positions shown in dotted lines in said figure. In such relative positions, the screens permit the ashes to be deposited in the sifter through the opening covered by the swinging closure, and to fall first on the screen F, then onto the screen E; and at such time, Whatever passes through the screen .F then falls upon the screen D. The ashes and finer portions pass through all the screens and fall into the receptacle C. Obviously, however, any coarser materials, such as the unburned coal, in falling on the screen D, then slide downward and fall into the receptacle B. The cover G can then be swung into its closed position, and by so doing, the movable screens are restored to their normal positions. When this is done, any coal or coarse materials retained in the screen E will be dumped onto the screen D, where they will then descend into the drawer or receptacle B. Thus the two upper screens are movable and are first dra'wn upward when the cover is closed, and then allowed to fall'into their operative positions when the cover is opened; and with this arrangement,v a certain amount of movable or shaking screen surface is provided for insuring a more effective screening and dumping of the ashes and unburned portions of the coal.

It will be seen that the two flexible connections f/ and e2 may pass upwardly through an opening in the stationary top portions of the box, and thence across the top of the box to the point of attachment to the swinging closure.

What I claim as my invention is:

1. In an ash sifter, the combination with a receptacle, a cover therefor, a pair of screens adapted to be swung into operative position on the opening of said cover, whereby one of said screens assumes a downwardly extending position, permitting the passage of the coal-ser material onto the second screen, said second screen being in a substantially horizontal position and adapted to retain a coarse material on its surface, a third screen onto which said material is discharged on the closing of said cover, and a pair of removable receptacles arranged to receive the tine material as it falls through the screen and the gross material as it falls 0E of the' last screen.

2. In an ash sifter, the combination with a receptacle, a cover therefor, a pair of screens' adapted to he swung into operative position on the opening of said cover,

whereby one of said screens assumes a downwardly extending position, perinitting the passage of the' eoarser material onto the second screen, said second screen beingY ilu a substantially horizontal position and adapted to retain a coarse material on its surface, a third screen onto Which said material is discharged on the closing of said cover, and a pair of removable receptacles arranged to receive the line material as it falls through the screen and the gross material as it falls off of the last screen, and a rigid defiector located in the upper part of said box 1() whereby the unsifted ashes are prevented from passingl directly into said last-named receptacle.

ANDREW M. NELSON.

Witnesses EDW. .T. Bns'r, ALnmrr SAUsnn.

Images