US958921A - Crushing or pulverizing machine. - Google Patents

Description

2 SHEETS-SHEET 1.

Patented May 24, 1910.

J. L. HILLER. GBUSHING 0BI PULVEBIZING MACHINE.

APPLIOATION FILED AUG. 28, 1909.

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L W ommi/ J. L. HILLER. GRUSHING 0R PULVERIZING MA CHINE.

APPLIGATION FILED AUG. 28, 1909.

Patented May 24,1910.

@N24/hmmm@ UNITED STATES JOSEPH L. I'IILLER, OF MATTAPOISETT, MASSACHUSETTS.

CRUSHING OR PULVERIZING MACHINE.

Speciication of Letters Patent.

Patented May 24, 1910.

Application filed August 28, 1969. Serial No, 515,103.

To all 'whom it may concern:

Be it known that I, JosErI-r L. HILLER, a citizen of the United States, residing at Mattapoisett, in the county of Plymouth and State of Massachusetts, have invented new and useful Improvements in Crushing or Pulverizing Machines, of which the following is a specication.`

This invention relates to improvements in grinding` or pulverizing machines of the class wherein the grinding surface, or, as it is termed in the art, the grinding cage, that cooperates with hammers or beaters to effect the grinding or pulverizing of the material, is made movable with relation to such hammers or beaters, so that the grinding surface or cage may be caused to move away from the cooperating hammers to enable the removal of any foreign uncrushable substance that may enter the machine together with that which is to be crushed or pulverized, or for other practical purposes in the use of the machine.

The object of the invention is to provide means by which material passing into the machine adjacent the side walls of the casing is guided and directed into the field of cooperating action of the hammers or beaters and the grinding` surface or cage.

In the class of machines to which the pres- 3o ent invention is applicable the movable grinding surface or cage is supported or carried by a frame comprising appropriately shaped arms underlying and to which the longitudinal edges of the grinding surface or cage are secured, a rigid or firm support for these longitudinal edges being essential to the effective operation of the machine. The active cooperating grinding or pulverizing surface or cage is limited to the space 4.o between the arms of the supporting frame, and that portion of the grinding surface or cage which overlies and is attached to the supporting frame has been found to be liable to afford a lodgment and permit of the building up thereupon, along the sides of the casing, a wall of the material introduced into the machine, which in the course of use of the machine becomes graduallyv more and more compact until it offers serious resistance to the movement of the rotating hammers or beaters to the detriment of the most efficient operation of the machine, and which also causes a materially unnecessary and objectionable wear of the end hammers. The present invention is designed to overcome this difficulty, and resides broadly in means, carried or supported by the movable grinding surface or cage, overlying the arms of the frame that support such grinding surface or cage, or in other words, the heretofore inactive portion of said grinding` surface or cage, which has afforded lodgment of material as above set forth, and operating to cause the material, which heretofore has been found to lodge and accumulate, to be guided and discharged into the eld of active cooperation between the grinding surface or cage and the revolving hammers or beaters. This means, as shown, consists of a shed preferably having a slope greater than the angle of repose of the material being treated, so that such material. as enters the machine along the side walls of the casing will, upon meeting said shed be deiected, guided and discharged int-o the field of operation of the grinding surface and rotating hammers or beaters, ground or pulverized and discharged through the openings of the grinding surface or cage.

The invention is illustrated in the accompanying drawing forming part of this specilication.

That which is regarded as new is set forth in the claims appended to the description.

In the accompanying draWing,--Figure l is a central sectional View, the rotating hammers being omitted for clearness of illustration of the subject matter of the invention. Fig. 2 is a View looking down upon one segment of the material slide or shed. Fig. 3 is a front elevation thereof. Fig. t is a sectional view taken through the casing and showing the relative disposition of the grinding cage or surface, the rotating hammers or beaters, and the material slope or shed. Fig. 5 is a sectional view of a modied form of shed. Fig. 6 is a sectional view taken in the line of one of the bolt holes of a segment of the shed shown in Fig. r9.. Fig. 7 is a top view of the modified form of shed shown in Fig. 5.

In said drawing the reference numeral l designates the side walls of the casing containing the operating parts.

2 designates a shaft carrying the battery of rotary hammers or beaters 7, the specific number, arrangement and detail of which are unimportant so far as concerns this invention.

3 designates a movable frame consisting of arms pivotally mounted, as at 4, and located adjacent the side walls of the casing. Carried and supported by this frame is the grinding surface or cage 5 that cooperates with the rotating hammers or beaters, the longitudinal edges of which are supported in or upon the arms of the frame. The cage and its supporting frame may beraised and lowered and adjusted with reference to the beater arms by any suitable means, for eX- ample, a chain l0 connected to the supporting frame ,and passing over the drum 9 substantially as shown in the Letters Patent heretofore granted to myself and George W. Borton, No. 896,019, August 11, 1908, and the supporting frame of the cage may be provided with a counter-balance ll if desired. Such cages or grinding surfaces, as known, may consist of la perforated sheet through which the material when `ground or pulverized may `pass from the machine, or may consist of bars bridging or .spanning the space between the arms of the supporting frame. Heretofore in such machin-es those Tportions of the grinding surface or cage which overlie the arms of the supporting frame have afforded a lodgment for material introduced -into the machine near the side walls l thereof, and in practice, as hereinbefore stated, such material has built up upon such lodgment and created a Wall of material which in the use of the machine has become ymore and more compact, to such an extent that unnecessary wear of the end hammers, which in the rotation thereof engage such wall, results, and the great friction arising by the presence of such ycompact wall has materially detracted from the most eflicient operation of the machine. To obviate this diiiculty I lprovide a shed 6 covering or .overlying the arms of the cage supporting frame, the slope or active sur- .face of which iu practice, vpreferably is greater 4than the angle of repose of the material introduced into the machine, that is to say, such as will insure the ymaterial coming into the machine sliding or riding on the s hed into the field Aof operation of the rotating hammers, and obviating the objectionable lodgment of material hereinbefore referred to. This shed may, within the scope yof the invention, consist of a series `of segments of sections, as shown in Figs. v2 and 3, bolted tothe arms that support Athe grindingsurface or cage. rIhe several segments of the cage are vprovided with bolt holes 8a for the passage of bolts 8, whereby the segments are secured to the cage supporting arms. Or the shed may consist of a continuous Lstrip of properly fashioned sheet metal (Fig. 5) having a slope or shed surface 6b, and the attaching leg 9 bolted or otherwise suitably secured to the supporting frame arms 3. This shed being so connected to the movable frame becomes in effect apart of the grinding surface or cage and partakes of all its movements and adjustments, and -in fact, except perhaps for economy of manufacture, the edges of the grinding surface or cage, where the latter consists of a perforated sheet, might be fashioned integrally with this slope or shed.

I prefer to construct the shed ofsegments for convenience of manufacture and assemblage, Ibut it will be understood that the invention is `not restricted to the details of construction of this element, but resides in the provision of the element or equivalent thereof broadly.

Having thus described the invention what is claimed is:

l. In a grinding or pulverizing machine, the combination with grinders and an adjustable cage or .grinding surface coperating therewith, of means secured to, movable with, and arranged at the longitudinal edges of said `vgrinding surface or cage to direct material into the field of cooperation of the grinding elements.

2. In a grinding or pulverizing machine, the combination with grinders and an adjustable cage or grinding surface coperating therewith, of sheds secured to, movable with, and arranged at the longitudinal edges of said grinding surface or cage to direct material into the field of cooperation of the grinding elements.

3. In a grinding or pulverizing machine, the combination with grinders, and an adjustable cage or grinding surface coperating therewith, of sheds secured to, movable with,.and arranged at the longitudinal edges of the grinding .surface or cage and having a slope greater than the angle of repose of the material ,introduced into the machine for .directing material into the field of cooperation of the grinding elements.

4. In a grinding or pulverizing machine, the combination with yrotary grinders, ofan adjustable lcage provided with raised longitudinal sides having sloping surfaces.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOSEPH L.l HILLER.

IVitn esses S. ELLA MA'rsoN, E. ALoYsIA TwoMEY.

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