US158808A - Improvement in coal-sifters - Google Patents

Description

UNITED STATES PATENT EEICE.A

JAMES STURGIS PEARCE, OF NORTHAMPTON, MASSACHUSETTS.

IMPROVEMENT IN COAL-SIFTERS.

Specification forming part of Letters Patent No. 158,808, dated January 19, 1575; application led December 15, 1874.

To all whom it may concern:

Be it known that I, JAMES S. PEARGE, ot

Northampton, .in the county of Hampshire,

' accompanying drawing forming a part of this specification, in which- Figure l is' an isometrical perspective view o' a sitter constructed upon my improved p an.

My invention relates'more especially to that class of coal-sitters in which the screens are housed or inclosed in a cabinet to confine the ashes and dust; and consists in a novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a simple, cheap, and ei'ective device is produced.

In the drawing, A is the case or cabinet; B, the hopper; and G the hopper-slide. The hopper is disposed near one side of the case, the coal inV passin through it falling upon the upper end ot th long screen D, which is arranged diagonally across the body of the cabinet, as shown. Between the lower end of 'the screen 1) and the side ot' the cabinet there is an opening, z, and beneath this opening a short screen, E, having liner meshes, and inclined iu a directionl opposite to that of the long screen. Near the-lower end of the screen D, and above the opening z, there ,is a chute, I, arranged in paralleli-sm with the screen E, the lower ends of the'last-named screen and of the .chute being supported by the crossgirders u a. A drawer or pan, H, is arranged in the lower part of the cabinet, into which it slides transversely through an opening in the side which supports the upper end of the screen D. A drawer, F, is fitted to slide -in an aperture in the door K, and is arranged in such a position with respect to' the other parts of the sitter that when the door is closed, the drawer will be supported centrally over the drawer H, and immediately under the opening between the short screen E and chute I. The drawer F has a sliding bottom, G, and a short distance above this there is a wire-screen, a part of which is rep resented in the drawing as removed, in order to show the space between the screen and bottom.

From the foregoing the nature and opera tion of my invention will be readily understood by all conversant with such matters.

The coal to be si'fted is poured into the hopA per B, and falls upon the upper end of the screen D, over which it passes, and, through the opening z, falls upon the screen E, and thence into the drawer F. In passing the screen D the bulk of the ashes will be separated from the coal and fall through the meshes of the screen upon the chute I, passing through the opening J into one end of the drawer H. On striking the screen E, a large proportion of the ashes which have passed over the screen D will be separated from the coal and fall through the screen into the 0pposite end of theA drawer. A small quantity of ashes, however, will generally adhere to the coal until it is deposited in the drawer F. This is separated by shaking the door in which the drawer F is supported, thus agi tating the coal, and causing the ashes to fall into the lower part of the drawer, from whence they may be removed by means of the slide G.

It will be seen that the door K not only performs the office ot' closing the cabinet and preventing the ashes and dust from escaping, but aliords a convenient means of sifting the coal in the drawer F,"after it has passed the screens D E.

I sometimes hinge the screen in the drawer F in such a manner that it may be dropped or attached to slides, so that it may be withdrawn after the ashes have been removed by l means ot' the slide G, as described, thereby enabling the coal to be discharged directly into a hod or other vessel without removing the drawer from the door.

Having thus described myinvention, what I claim isln a Vcoal-sitter, constructed substantially -as described, the drawer F,- combined to operate with the door K, screens D E, and drawer H, substantially in the manner and for the purpose specied.

JAMES STURGIS PEARGE. IL. su] Witnesses: p

DAVID W. CRAFTS, CHAs. S. BARTLETT.

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