US625212A

US625212A - straker

Info

Publication number: US625212A
Authority: US
Publication date: 1899-05-16
Anticipated expiration: 1916-05-16

Description

No. 625,2I2. Patented May I6, I899.

S. STBAKER.

PULVEBIZING 0R GRINDING MACHINE.

(Application filed Dec. 29, 1897.)

4 Sheets-Sheet I.

(No Model.)

THE NORRIS PETERS 00.. woraurumwukmamu. u. r;

N0. 625,2l2. Patented Nay l6, I899. S. STRAKEB.

PULVERIZING 0R GRINDING MACHINE.

(Application filed Dec. 29, 1897.)

4 Sheets-Sheet 2.

(No Model.)

liar/1 51/ THE Nonms PETERS cc. PHOTD-LITHOW WASHINGTON. n. c

Patented May I6, I899.

4 Shasta-Sheet 3.

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No. 625,2I2.

s. STBAKER.

PULVEBIZING UR GRINDING MACHINE.

(Application filed Dec. 29, 1897.)

(No Model.)

No. 625,2!2. Patented May [6, I899.

S. STRAKER. PULVERIZING 0B GRINDING MACHINE.

(Applicat ion fllsd m 29, 1997. v(No Model.)

4 Sheets-She0t 4.

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UNITED STATES PATENT OFFICE.

SIDNEY STRAKER, OF LONDON, ENGLAND, ASSIGNOR TO THE CENTRAL CYCLONE COMPANY, LIMITED, OF SAME PLACE.

PULVERIZING OR GRINDING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 625,212, dated May 16, 1899.

Application filed December 29, 1897. Serial No. 664,272. (No model.)

To all whom it may concern.-

Be it known that I, SIDNEY STRAKER, civil engineer, a subject of the Queen of Great vents in Great Britain, No. 9,995, dated May 18, 1893; in Italy, LXVII, 70, dated May 27, 1893; in Transvaal, No. 1,102, dated August 11, 1806; in Tasmania, No. 1,601, dated April 25, 1890, and in India, No. 208, dated June 15, 1806,) of which the following is a specification, reference being had to theaccompanying drawings.

This invention relates to apparatus for pulverizing, grinding, or disintegrating grain and other substances.

The chief object of my said invention is to provide an improved pulverizing-disintegrator for the purpose of reducing heavy material.

Further objects of my invention are to improve the driving mechanism and certain details of such apparatus.

In order that my said invention may be clearly understood, I will describe the same with reference to the accompanying drawings, in which- Figure 1 is a plan of a machine constructed according to myinvention, in which the grist is pulverized to an impalpable condition and then ejected through the top of the machine. Fig. 2 is a vertical section on the line at as of Fig. 1. Fig. 3 is aview of the machine half in elevation and half in transverse vertical section at right angles to Fig. 2 and on the line y y of Fig. 2. Fig. 4 is a detail of the machine. Fig. 5 is an exterior elevation of the machine, with the addition of apparatus hereinafter fully described and constituting an important adjunct to the said machine. Fig. 6 is a view at right angles to Fig. 5 of the apparatus illustrated in the latter figure.- Figs. 7 and 8 are elevations at right angles to each other and partly in section of one arrangement of driving mechanism according to this invention.

Referring to Figs. 1, 2, and 3, A is the reducing-chamber, formed within a rectangular casing and a suitable hollow bed B, which supports the said casing.

C is the beater-shaft, upon which are secured a fan or beater D and a pulley E, by which rotation is imparted thereto.

A is a channel .or chute by which the material to be disintegrated is introduced into the reducing-chamber. Upon the inside of the machine-walls two serrated impinging rings J are bolted in parallel vertical planes, between which rings the fan D revolves. The serrated faces of the said rings are inclined, so as to be nearer the fan D at their outer circumference than at theirinner circumference, as shown in Fig. 2. Each of said rings may be built up of bars or of separate serrated plates or may be made in one piece or in four or more segments.

Impinging bars K K are arranged in a double series placed in the upper portion of the reducing-chamber, the lower portion being closed by corrugated impinging surfaces P P. Further, arelief-chamberB is formed in the casing 13. Material disintegrated in this machine is ejected between the bars K K, as hereinafter set forth.

The bars K fit in recesses J, provided at the edges of the impinging serrated side ratchets J, and are fixed in the said recesses by segmental plates Q, bolted to the side walls of the casing, as shown, and bearing upon the tops of the bars. the said segmental plates for the reception of the ends of bars K.

The bars K and K are arranged to form two concentric series. The bars of each series break joint with the bars of the other series.

Holes Q are formed in The corrugated impinging surfaces P are sup ported at their lower ends upon a bearingpiece R, forming part of the main frame of the machine, and their upper ends are held in position by the screws S, screwed through the casing. By slacking back the screws S the impinging segments .P may be readily removed from the machine.

The relief-chamber B, which, as aforesaid, is provided upon one of the walls of the'casing B, is open at its upper end, and at its lower end communicates with the interior of the reducing-chamber within the periphery of the grinding-fan by openings B The lower walls B of the relief-chamber are inclined 0r hoppered to cause material which falls thereon to return readily into the reducing-cham- ICO ber A by gravitation and by the action of the air-current. The said relief or return grist chamber B is provided to convey all particles of insufficiently-ground material back into the reducing-chamber A, where it is further reduced until of a sufficiently fine consistency to be carried away by an exhauster into the grist depositing room.

A, Fig. 2, is the feed-channel by which material for reduction.is first introduced to the reducing-chamber A.

In some cases a continuous feed may supplement the hand-feed. Such a continuous feed is illustrated in Fig. 4, wherein A is a hopper with a bottom A which can reciprocate. C is an eccentric fixed upon a counter-shaft C and connected to the hopper-bottom A which it reciprocates as the shaft 0 rotates.

The apparatus illustrated in Figs. 5v and 6 constitutes a pneumatic separator which is fitted with a manhole and clamping device and comprises a hood or closed chamber T, connected at its lower end, as shown, with the upper portion of the casing of a machine of the type shown in Figs. 1, 2, and 3, and connected at its upper end by the bent channel T with the suction-inlet of a centrifugal fan U. The delivery-pipe U of the fan is connected to any suitable collecting-chamber. Within the said hood are baffies T, T T and T arranged as shown, for a purpose hereinafter explained. The baffles T and T are arranged so as to act upon the current of I pulverized material which issues from the machine through the bars K K, Fig. 2, for example, to cause the heavier and insufficiently-ground particles to travel on to the sloping wall T of the hood, down which they gravitate into the grist-return chamber B, Fig. 2, for example, and thence into the reducing-chamber of the machine for further reduction. All fine dust is separated from these heavier particles and carried away through the channel T on top of the hood by means of the exhausterU and transported to the depositing-chamber. Thus a separation of the'fine from the coarse particles is effected without the use of screens, sieves, or similar appliances. The course of the currents of material in the said apparatus is indicated by the arrows in the drawings.

I will now proceed to describe the improved driving apparatus shown in Figs. '7 and 8, wherein V is a suitable double-actin g steamengine on the same bed-plate or foundation as the pulverizing-machine. C is a worm fixed upon the shaft (1 and having, preferably, six or more threads. The motor is inclosed in a casing v, and the worm O and worm-wheel V are inclosed in a casin g 1 which forms an extension of the casingv, with a removable top cover 22 and also a removable hood o which latter is provided in order that easy access to the bearing thereunder may be had. The bearing V of the shaft V and the bearing 0 of the shaft 0 are provided with caps having open tops, which will always be kept full of and worm-wheel improves the construction of the apparatus, for the vertical walls thereof form good supports for the bearings 0 which bridge the space between them and serve, in turn, to tie the said side walls together, so as to stiffen the structure. Part of the main framing, as at W', is formed to serve as an oilbath for the worm-wheel and the motor.

In machinery of this kind arrangements for preventing dust from entering the bearings during the working of the machine are matters of considerable importance, and Iaccordingly provide circular fliers or cupped Washers 0 upon the beater-shaft O, as in Fig. 2. The fliers are at'fixed to the shaft and cast off centrifugally any grit or dust that may issue from the reducing-chamber.

I provide water-jackets for the reducingchambers in certain cases and provide the said jackets with proper circulators.

The pitch of the thread upon the worm 0*, as well as of the teeth of the worm-gear V, is such as to prevent the liability of these parts binding.

What I claim is 1. In a disintegrating-machine, the combination with a reducing-chamber of a reliefchamber arranged on one side of said reducing-chamber,its open top communicating with the upper part of its lower end with the interior of the reducing-chamber within the pechamber, a relief-chamber on one side of the reducing-chamber opening into the separating-chamber, a baflie-plate arranged over the open top of the reducing-chamber and inclined away from the open top of the reliefchamber, a second bathe-plate over the top of the first and inclined to direct the current deflected by the latter back over the open top of the relief-chamber, an air-exhausting apparatus and a passage to the same from the top of the separating-chamber, substantially as described.

In testimony whereof I have hereunto set my hand this 1st day of December, 1897.

SIDNEY STRAKER.

Witnesses I II. A. SHLEY NORRIS,

. FRED C. HARRIS.