US517311A - Machine for crushing and grinding asphalt rock - Google Patents

Description

2- Sheets-Sheet 1.

i (No Model.)

,J. H. TABLER. 1111110111113 FOR GRUSHING AND GRINDING ASPHALT ROGK.

No. 517,311. Patented Mar. 27, 1 94.

WITNESSES.

A TTOHNE YS.

(No Model.) 2 Sheets-Sheet 2.

I I J. H. TABLBR. v MACHINE FOR GRUSHING AND GRINDING ASPHALT ROCK.

Patented Mar. 27, 1894.

IJ NY WITNESSES:

crusher.

NiTED STATES ATENT OFFICE.

JOHN H. TABLER, OF RUSSELLVILLE, KENTUCKY.

MACHINE FOR CRUSHING ANDiGRINDING ASPHALT ROCK.

SPECIFICATION forming part of Letters Patent No. 517,311, dated March 2'7, 1894.

Application filed $eptein'ber 22,1893- Serial No. 486,243- (No model.)

To all whom it may concern.-

Be it known that I, JOHN H. TABLER, residing at Russellville, in the county of Logan and State of Kentucky, have invented a new and Improved Machine for Crushing and Grinding Asphalt Rock, of which the following is a specification.

My invention relates to means for crushing and grinding asphalt rock, as it leaves the quarry, into a size suitable for shipping, and ready for use to be mixed in with asphalt, concrete or other material for paving purposes, and among other objects, it has for its purpose to grind such rock in a simple, rapid and economical manner.

The invention consists in the peculiar arrangement and novel combination of parts hereinafter described and particularly pointed out in the claims, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of the complete machine or apparatus. Fig. 2 is a longitudi nal section of the heater, crusher, and revolving feed cylinder, taken on the line 2--2 of Fig. 3. Fig. 3 is a front elevation of the Fig. 4 is a transverse section of the heater and feed cylinder on the line -l-4 Fig. 2 and Fig. 5 is a view of a modification hereinafter referred to. Fig. 6 is a detail View of the crushing rolls.

In the practical construction of my machine, I employ a revolving feed drum, mounted over a heating chamber, into which drum the material is fed at one end, and is heated as it passes therethrough before it discharges into the crushing and grinding rolls. These rolls arearranged with different contact faces, are of different diameters and are differentially spaced'apart, and journaled to rotate at different speeds, whereby the material is successively crushed into small particles and caused to uninterruptedly feed through such rollers; mixed steam and hot water being also mixed with the material as it is being crushed whereby to prevent the same from clogging or adhering to the rolls.

Referring now to the drawings A indicates a suitably arranged supporting frame, and B a cast iron fire box or fine chamber, the upper end of which has a cylindrical extension formed of a sheet metal jacket, such jacket and the fire chamber forming, as it were, a

tubular heating drum, at the front end of which is disposed the fire box proper, while at its rear or discharge end is the off take or stack pipe I) as shown most clearly in Fig.2. Bv reference to such figure it will be noticed that within the tubular heating drum is held to turn, the feed cylinder 0, which is mounted on a shaft D, by means of the spider arms c, which shaft is journaled in bearings o. a on the main frame, its rear end being promoted as at d and provided with a bevel gear D.

In the practical construction I prefer to form the feed cylinder with a smooth nner face, and incline same downward from ts receiving to its discharge end as shown, it being obvious however that the same may be arranged horizontal and provided with spiral or feed ways of any ordinary construction.

E indicates the hopper arranged at the top of the crushing and grinding portion of the machine which receives the heated rock from the feed cylinder 0, which discharges into the crushing and grinding chamberF, on top of the main rolls G. These rolls it will be noticed have sharp cutting shaped teethg, and are held spaced apart a 'sufficient distance, in practice three inches, to take in between them the largest pieces of stone, which they crush, and feed in a crushed state to the next set of rolls G, which have shallow corrugated peripheral faces, and in pract ce are held but one and one-half inches apart and serve to crush the partially crushed stone 8 5 into smaller portions, and feed same onto the grinding or pulverizing rolls G, which have smooth faces, which approximately contact as shown in Fig. 2 and serve to grind the stone up fine, and discharge same onto an 0 inclined bottom H, from which it passes into a suitably arranged receptacle. To the more effectively crush the stone and prevent c1ogging, the several sets of crushing and grinding rolls are geared together, and driven in 9 5 different speeds of rotation, the upper or main crushers in the practical construction being adapted to travel one hundred and fifty revolutions per minute, the second set one hundred and seventy-five revolutions and the Ice grinders two hundred revolutions per minute, such differential rotations of the rolls serving to cause the lower setof rolls to discharge quicker than they receive, and in consequence theyserve thereby to automatically free themselves from the danger of clogging or accumulating the material between them, such rolls being driven by the main drive pulley I belted with a drive belt J, driven by a steam engine as shown, or other power, a counter shaft K geared with the bevel gear 01 on the feed cylinder shaft D being also driven from the main drive wheel as shown most clearly in Fig. 3.

I" indicates a pipe extending from the engine t0 the hopper E which discharges mixed steam and hot water into the hopper to mix in with the stone, such operation being preferably continuous so long as the engine is at work. By mixing steam or hot Water to the material the rolls and material will be kept hot, thereby preventing such material from gumming or sticking to the rolls, it being manifest that the said pipe may be provided with a valve whereby the supply of steam or hot water may be regulated as desired.

From practical experimentingI have found that without warming or heating the stone it cannot be successfully crushed, and without heating the rolls, and keeping the material hot as it passes therethrough the same would become gummy and adhere to the rolls, making a continuous operation of the machine for any length of time impossible.

It will thus be apparent from the foregoing description taken in connection with the drawings, that by constructing a machine as described, and treating the material by the method stated, I am enabled to effectively and economically crush and grind the stone.

In Fig. 5 I have shown a modified arrangement of the stone feeding devices, in such construction a carrier chain M held to move over the heater is shown.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A machine for crushing asphalt rock, comprising a fire box having a cylindrical extension, forming a heating chamber, a feed cylinder held to revolve in such chamber, and crushing rolls at the discharge end of such cylinder, adapted to receive the dry hot rock as it passes from the cylinder all arranged substantially as shown and described.

2. In a machine for crushing asphalt stone, the combination with a fire box or heating chamber, a stone carrier movable in such chamber, a receiving hopper at the end of such carrier adapted to receive the stone in a hot dry condition, crushing rolls disposed under the hopper to receive such stone, and a mixed steam and hot water supply held to discharge into the dry hot material as it passes through the crushing rolls all arranged substantially as shown and for the purpose described.

3. Animproved means forreducing asphalt rock from its original quarried state, in condition for use as a paving material, comprising a heater, a rock carrier adapted to move the material longitudinally and transversely over such heater, means for operating such carrier, crushing rolls formed in successive series to gradually reduce the material, a receiving hopper connecting such rolls and the discharge end of the carrier adapted to feed the hot rock direct from the carrier to the rolls, all arranged substantially as shown and for the purposes described.

at. In a machine for reducing asphalt rock from its quarried state, the combination with a heatin g furnace and arock carrier movable over such furnace and arranged to discharge the rock in a heated condition, of a hopper arranged to receive the heated rock from the carrier, crushing devices consisting of a series of crushing rolls, and a mixed steam and hot water supply held to discharge into the hopper to mix with the rock and distribute over the crushing faces of the rolls, all arranged substantially as and for the purposes shown and described.

5. Ina stone crushing machine, as described, in combination, a heating chamber, afeed cylinder held to rotate therein having its shaft projected and provided with a drive gear, a hopper, crushing rolls mounted under such hopper, said rolls being mounted in yielding bearings, the drive gears, the engine, the drive belt connection between such engine and the roll drive gears, a counter shaft geared with the cylinder shaft, operated from such roll gears, and the steam pipe connection between the hopper and engine, all arranged substantially as shown and for the purpose described.

JOHN H. TABLER.

Witnesses:

J. M. MoCuroHEN, T. S. RHEA.

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