US94651A - Improved ash-sifter - Google Patents

Description

inited gister DANIEL T. ROBINSON. OF BOSTON, MASSACHUSETTS.

Letters Patent No. 94,651, dated September 1869.

IMPRovnD ASH-sieren How-.

The Schedule referred to in these Letters Patent and making part of the lame.

To all to whom. these presents shall ooms:

Be it known that I, DANIEL T. ROBINSON, of Boston, in the county of Suifolk, and Commonwealth of Massachusetts, have made an invention of a new and useful Asl'I-Sifteryand do hereby declare the following to be a full, clear, and exa'ct description thereof, duc reference being had to the accompanying drawings, making part of this specification, and in which Figure 1 is a perspective representation, and

Figure 2, a vertical section of my invention.

This invention is intended to secure cleanliness, economy, and convenience in sitting coal-ashes, which, united with ease and rapidity in action, render such invention of equal if not superior value to those now manufactured and introduced.

The drawings which accompany and make part of this specification exhibit an implement in which my invention is embodied, and which consists as follows:

A circular disk, or cover, a, is first provided of such size as to lit upon the top of a barrel or other receptacle, and tightly close it, such disk or cover having a large central and rectangular opening, b, for precipitation of sifted ashes to the interior of the barrel, and with a second smaller and auxiliary opening or trap, c, disposed alongside of the central opening.

About the opening b, a hopper or raised enclosing ledge, d, is disposed, while upon the upper part of this hopper a sliding screen-box or sieve, e, rests, the bottom of this box being formed of a screen, f, ofl suitable material.

The bottom ofthe box e rests and slides upon the ends of the hopper d, which are slightly depressed below the level of the sides thereof, the latter thus becoming guides to the reciprocating movements of the sieve, and preventing its displacement.

The box e is furnished with a cover, g, at top, for permitting entrance of ashes, and is also provided at one end with a drop-leaf or door, h, to permit the screened coal to be dumped from the box, as hereinafter explained.

The necessary reciprocating movements of the sieve are eiiected as follows:

A hoiizontal shaft, fi, is disposed centrally across the interior of 'the hopper d, and revolves in bearingsmade in its sides.

'lo opposite sides of each extremity of .the shaft i, and in close proximity to the inner side walls of the l hopper, I afix two wiping-studs or cams jj, while to each of such walls I afiix a bent-lever, It, each lever k being pivoted at its bend to the wall, as shown at l, and disposed with respect to the wiping-studs jj in such manner that the latter, revolving with the shaft,

sha1l,impinge against the under surface of the hoiizontal arm of each lever, the upright arm thereof being disposed in front of a projection, 1u or m, affixed to or making part of the/sides ofthe hopper, as represented in the drawings. v

Furthermore, additional spurs,A or projections, n 11., are formed upon oraliixed to the walls of the hopper upon sides of the shaft opposite to those first mentioned, these latter spurs being situated in the path of movement of the wipers jj.

It will be seen that-upon putting the shaft'i in revolution, that the wipers jj will alternately impinge against the nearest arm of each lever 7:', and against each spur n n. j y

The impact of the wipers beneath the levers or the spurs has the effect of producing one traverse of the sieve upon the hopper, and of throwinginto the path of movement of either the levers or the wipers, the projections m m or n 11.. 4

By the arrangement of the shaft i, wipers jj, levels k L, and projections Im m and n n, I effectA four movements of the sieve to one rotation of the shaft, thus permitting rapid reciprocations' of the sieve to be atta-ined, with a comparatively easy and slow rotation ofthe shaft.

In using the above described implement, the ashes` tobescreened are to be dumped into the sieve, and its cover tightly closed,fwhich prevents escape of dust into the apzu'tment.

The shaft is then to `be rotated for a short time, and after the dust within the sievehas subsided, the cover is to be raised, and the clinkers sorted from the coal and thrown iut-o the barrel through the trap c.

The sieve is then to be tilted upon one. end, and into the inclined position shown in in2 ofthe accompanying drawings, and the drop-door h opened, which allows the coal to fall into a hod placed to receive it.

An ash-sitter, made as described, has been found in practice to embody all desirable features of such arti cles, and' may be produced at small cost.

` Y Claim. c

I claim an ash-sifter, composed of the disk a, with its apertures b and c, hopper d, in combination with the sieve c, the shaft t', and its wipers j j, the levers k k, and projections m m and mi, or their equivalents,

the whole heilig and operating as described.

DANIEL T. ROBINSON.

Witnesses:

FRED. CURTIS, EDWARD GRIFFITH.

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