US840845A - Feeder for comminuted material. - Google Patents

Description

N20. 840,845. PATENTED JAN. 8, 1907.

G'. s. HEATH.

FEEDER FOR G'OMMINUTED MATERIAL.

APPLICATION FILED JAN.29. 1906.

I v v I 1 WTNES SEE CIR UNITED STATES PATENT oriuen.

GEORGESIDNEY' HEATH, or REVERE, MAssAcnUsn'rrs, ASSIGNOK T HUFF ELECTROSTATIC SEPARATOR COMPANY, or nos'ron, MASSA- cHUsE'rTs, A CORPORATION OF MAINE.

Specification of Letters Patent.

Application filed January 29, 1906. erial No. 298,fl().6.

To all whom zit may concern.- p Be it known that I, GEORGE SIDNEY HEATH, a citizen of the United States, and a resident of Revere, in the county of Suffolk and State of Massachusetts, have invented newand useful Improvements in Feeders for Coinminuted Material, of which the following is a specification.

My invention relates to apparatus and mechanisms for feeding and distributing comminuted material. and it consists in the inn rovernents hereinbelow described.

' .n the drawings hereto annexed ,whichillustrate an embodiment of my invention and improvement, Figure 1 is a longitudinal elevation, partly broken away, of the feeding apparatus. F ig. 2 is a top plan view of the same; and F ig. 3 is a cross-section of Fig. 2, taken at the line 3 3.

' Considerable difliculty has heretofore been encountered in the operation of feeding comminuted material, especially when the said material consists of particles which differ from each other in size, in specific gravity, in superficial character or texture, in hardness, h. groscopic capacity, andin other physical c aracteristics. Even a'mixture of homo- ,gencous comminuted particles tends to. clog and form lunips, and in the case of mixtures of heterogeneous particles there are'superadded the difficulties due to the automatic segregation of differentiated components when all are subjected to a uniform applica tion of force.

There is illustrated in the drawings an em bodiment of my invention and improvement which has in practice proved effective to feed continuously and evenly a thin stream of material whether composed of heterogeneous or homogeneous particles. I provide a containing-hopper, as'A, into which the mass of comminuted material is fed in any desired quantity. The hopper A rests upon a base B, to which are secured adjustable plates by the construction. These plates at their adjacent dges are beveled, so as to form a slot or opening is, which is narrowest atth'e the enlargements it.

top. Preferably I make the plates It. thicker at their adjacent edges, as at it, and these plates and the slots formed by their approxi mation to each other extend substantially the entire length of the hopper A at the bottom thereof.

In the ends of the hopper A apertures I are provided which admit the passage of the ag1tator-bar (l. The bar C has secured to it,

or if it be of metal cast integral with it, a

number of floats D, these floats, as shown in Fig. 2, being preferably set at an acute angle to the bar C. The angle which I have found in practice .to serve best the purposes to which the feeder is applied is about forty-five degrees. At one end of the feeder-bar C the same is articulately jointed to a connectingrod E, the other end of this connecting-rod being secured, as by a crank-pin, to an agitating disk or wheel F, which is driven by a belt or by any other desired instrument for the transmission of power. The apertures I are preferably somewhat larger in cross-section than the agitator-bar C, so that there is room for play of the latter laterally as well as provision'for it to move longitudinally.

The lower edgcs'of the floats I) rest upon the adjacent inneredges of the plates K, and where, as shown in the specific illustration exhibited in the drawings,thc plates Kare thickened at their inner adjacent edges I perfer to make the iloats 1) sufficiently wide to extend entirely across the upper surfaces of By this means the formation by abrasionof a channel in which the floats will move only longitudinally is avoided and the combined longitudinal and lateral movement thereof permanently assured.

Patented Jan. 8, 1907. V I

The operation of the apparatus is as follows: When'the wheel F or such other agitatsharp ed go on each of these plates, so that the upper slide of the slot It shall always be transversely the smallest portion of the said slot, and thus the danger of particles of material wedginp in the slot is successiull obviated. W'hen also, as I prefer, the feeder-bar and its floats are given a lateral as well as a longitudinal movement, the lower edges of the floats are also worn evenly, and the formation of protulwrances on the lower edges of y the floats immediately over the slot is 1s prevented. I consider it advisable to prevent the formation of such protuberances, because if they are so formed their effect will be to wear laterally upon the edges of the plates K and form a narrowing taper from the top downward, which would tend to be clogged with particles of the material under treatment. tator-bar, with floats set at an acute angle thereto, stirs the eomrninutcd material e tl'cctively, giving it a side throw in either direc tion, as well as agitating it longitudinally.

l/Vhen, as may be the case, the hopper A is of considerable capacity and vertical height and the materials contained therein are linely comminnted and of considerable weight, the resistance to the movement ol the feeder-bar and its floats may increase so to tax unduly the drivinp mechanism. In order to relieve the feeder-bar from undue load, I provide the shed M, which is secured in the hopper immediately above the feeder-bar. This shed preferably slopes in either direction toward the sides of the hopper and sustains the,

major part of the weight of the superincumbent mass of material, allowing only enough to flow downward between the edges of the shed and the sides of the hopper to keep the feeder in full efl'ective operation.

What I claim, and desire to secure by Letters Patent, is

1. In a feeding apparatus, the combination of a hopper and feeder-bar, means to re eiprocate the feeder-bar longitudinally in the hopper, bottom plates with adjacent edges to form a longitudinal slot under the feederl\'loreover, the preferred form of agi' bar, and floats on the feeder-bar sliding upo the bottom plates.

2. In a feeding apparatus, the combination of a hopper and feeder-bar, means to reciprocate the feeder-bar longitudinally in the hopper, bottom )lates with adjacent edges to form a slot un er the feeder-bar, and floats on the foeder-bar at an acute angle thereto and sliding upon the bottom plates.

3. In a feeding aparatus, the combination of a hopper, a l zzeder-bar, means to reciprocate the fe'edenbar longitudinally and laterall in the hopper, and bottom plates with a jacent edges to form a slot under the feeder-bar.

4-. In a feeding a paratus, the combination 01 a hopper, a eed'er-bar, means to reciprocate the feeder-barlongitudinally in the hopper, bottom lates with adjacent edges to form a slot on er the feeder-bar, and floats on the. feeder-bar at an acute angle thereto and sliding upon the bottom plates.

In a feeding a paratu's, the combination of a hopper, a tireder-bar, means to reciprocate the feeder-bar longitudinally, bear-v in for the feeder-bar to slide in havinglateral clearance therefor, bottom plates in the" hopper with adjacent edges to form aslot, and floats on the feeder-b'ar'at an acute angle.

thereto, sliding upon the bottom plates 6. In a feeding apparatus, the combina" tion of a hopper, bottom latest-hereilnlatorally adjustable and thic 'rened at'theiratl jacent edges, on the top thereof, and beveled to iorma slot widening downward, a; fe eder'-; bar, means to reciprocate the same longitude"- nally of the hopper, end bearings for the feeder-bar providin lateral play therefor, and floats on the feedenb'ar at'an acute angle thereto, resting on and spanning the thickened portions of the bottom plates. l

7. In a feeding apparatus, the combination of a hopper, a feeder-bar, means to reciprocate the teeder b'ar longitudinally in the hopper, bottom plates with adjacent edges to form a slot under the fceder-bar,floats on the feeder'bar and a protective shed located in the hopperabove the feeder-bar.

Signed by me at Boston, ltlassachusetts,

this 20th day of J anuary, 1906.

GEORGE SIDNEY HEATH; Witnesses: l

Jasnrn T. BRENNAN,- GnAoE E. GIBBONS.

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