US1840803A - Woodworking machinery - Google Patents

Description

Jan. 12, 1932. a. BABARE WOODWORKING MACHINERY Filed Feb. 27. 1929 2 Sheets-Sheet Jan. 12, 1932. s. BABARE woonwonxme MACHINERY Filed Feb 27. 1929 2 Sheets-Sheet 2 m n We GEO/6655686162? Patented Jan. 12, 1932 GEORGE BABARE, or TACOMA, wa snin-eron woonwonxme a c 'InnnY Application filed February 27, 1929. Serial No. 343,151

The present invention is directed primarily to an improvement-in wood-working ma chinery of the type commonly known as a hog, wherein pieces or sections of woodare '7 reduced to a more or less finely comminuted form. v

' The use of the conventional hog, vbothjas to operation and purpose, is well understood,

the users of this type of apparatus being con- I 0 versant with a disadvantage substantially inherent in the operation of the mechanism.

This disadvantage is incident to the accumulation ofchipsor fine particles of wood incident to the operation of the cutters,w th

such'accumulation operating at times to 111- terfere withthe proper operation 'of-the' apparatus. Thi's is so well known in deings, the knives, which include supports8 vices of this character that usually the hog communicateswith a conduit under the power of-a remotely arranged-suction apparatus,

whereby the chips are positively drawn free of any choking or crowding'relation in'the hog proper. 1 V

The present invention aims primarily to avoid this objection and particularly toavoid the requirementof an extraneous suction apwell as a very considerable centrifugal force paratus by utilizing the centrifugal force and air pressure created in the hog proper as a means for'for'oing'the chipsto a'position at leastjbeyond the possibility ofchoking or interfering with the normal operation of the hog. A.

panying drawings,. in' which: Figure 1 1s a view in side elevation of a hog constructed in accordance with the pree 'ent invention. V I V Figure 21s a vertical central section of A fthe same; I 1

Figure31s. a Vertical" section of the'same taken at right angles to "Figure-1.

Figure 4 an elevatioin'partly broken out, of a' modified form. V r In the present construction, the hog mechr posedradially arranged elements which, in; vtherotatiou of the carrier-'c, setup astrong further object of the invention is the provision of means directly operated'bythe' hog and designed in'itself to produce an air The invention 1s illustrated in the accom I formed with anoutlet 12 which may corn anism is substantially conventional except.

insofar as specific details hereinafter particularly'referredto areconoerned." For examfple, the 'hoginc'ludes' a supporting frame 1' in which is mounted a shaft 2 driven from "6 any convenient source ofpower, as through a belt pulley 3. Secured upon the shaft-2 is a a carrier 4 on which are securedblades 5 having their cutting edges at an angle tothe;

horizontal. The blades are arranged wholly at one side- 0f the carrier so as to cut through the material, indicated at 6, which is slidable on ananvilorbed? soarranged that the ma- V terlalis nioved into the'pathof the knives and chipped)? mm ted' to the desired extent usual in apparatusj ofthis character. 7 As will be plain from Figure 2 ofthe drawdisposed at oneside of thecarrier 4 near the I dial relation, together with the blades 5 which are removably connected to the supports 8, provide a series of peripherally "disair current which" is directed outwardly as of the knives. To-provide for this, thestrucf t-ure' forming the subject-matter of this invention includes a casing 9 which encloses the carrier Land blades, being open,however,

to'the admission of the material initlie plane of the anvil. This casing lnc'ludes an a'n'nu f lar outer wall lO'which'is spaced 'f periphery ofthecarrier 4; and side walls 111 which define the slide planes of niovement'of r the blades except through the opening c'o-i' extensive with the anvil. This casing is.

municate with a" conveyor, chute," or other means of actual transference of the chips.

- In operation, it will-be apparent that the rotation of the carrier 4 with" the blade ele-m, I

considerable centrifugal energy, and that by the use and application of the casing, this air current is directed to and forced through the outlet 12. The centrifugal force developed by the blade elements causes the chips cut from the material by the respective blades to be moved toward the periphery of the car rier 4:, such comminuted material being here met by the air current set up in the rotation of the parts and forced by this air current to be delivered to and through the outlet 12.

In Figure 4 I have illustrated a modification in which the hog is of a conventional type including a rotor 13, blades 14, an anvil 15, and supporting frame 16. In this form, the casing 17 which envelops the rotating parts, is extended laterally beyond the blades in the form of independent casings 18. The

shaft 19 on which the hog cutting elements are fixed extends through the casings 18 and is provided therein with a series of radiating fins 20. The outlet from the hog casing is open to the air created by the fins 20 within the casings 18.

Here, in the form shown in Figure 1, equally with the form shown in Figures 1 to 3, the blades develop a centrifugal force which directs the chips in fine particles into the path of the air current developed by the fins 20 and thus a powerful pressure is developed to direct the chips from the hog.

The characteristic feature of the present invention is to utilize the hog as a means for inherently creating a force which will not only clear the hog of chips but will be sulficient to force said chips to a point of delivery beyond the hog. In some instances, particularly as illustrated in Figures 1 to 3, no additional elements over the usual hog con struction other than the casing arranged as described is necessary as the force is developed in the rotation of the moving parts of the hog and is merely utilized and directed for the designed purpose.

It will be appreciated that the material cut by the hog is of considerable weight as compared with saw-dust or light shavings and the like and therefore a considerable pressure is necessary to move this material. The invention in this particular is therefore clearly distinguished from the use of a suction fan in the delivery pipe, for such suction fan would not and cannot reach the point where the knives cut through the material with SLllllClGl'lt force to clear the chips from the hog. It is by the development of this force substantially at the point of the chip formation and by directing the. force continuously thereafter against the chips that effective provision is made for clearing the hog of the chips practically as fast as they are produced. The power generated is inherent in the moving parts and will of course continue effectively as long as the hog is operated.

It is a merit of the present invention that the novelty resides in the utilization, confining and directing of the inherent force developed in the operation of the hog and that to this extent and in this particular, no limitation with respect to the hog structure per se is intended nor to be concluded from the specific illustration and description of such parts herein, for other types of hogs may be readily constructed to utilize the inherent force generated in their operation, and the application of the invention to such is contemplated as within the spirit of the present invention.

It will, of course, be appreciated that if the outlet 152 communicates with the conveyor, the chips delivered by the hog are, through the force generated, delivered onto this conveyor, and experience has demonstrated that the force developed is suiiicient to force the chips a very considerable distance through an elongated pipe conveyor. Of course, it will be understood that the rotation of the hog is of the usual revolutions perminute and that in this very speed there is created a disturbance of the surrounding air conditions which, when confined as contemplated by this invention, sets up the air current under pressure to clear the chips from the hog and deliver them over a very considerable distance to a remote outlet or conveyor.

Nhat is claimed to be new is:

1. A hog including a disk-like carrier, a shaft for rotatively supporting the carrier, blades projecting from one face of the carrier in spaced relation for chipping the material, said blades having inwardly directed cutting edges lying in planes which are tangent to an imaginary cylinder whose axis is coincident with the axis of said shaft, and a casing arranged in annular spaced concentric relation to the cutting plane of the blades and formed with an outlet, thecasing being freely open to the space between the blades and acting as a means for confining the air pressure developed bythe blades in their cutting operation and directing such air under pressure through said outlet to thereby force the chips cut by the blades toward and through the outlet.

2. A hog including a casing mounted for rotation, and a plurality of cutting elements carried by the casing and having inwardly directed cutting edges lying in planes which are tangent to an imaginary cylinder whose axis is coincident with the axis of the casing, said casing serving to confine and direct the air under pressure developedrby the. blades incidentto their cutting operation.

3. A hog including a. casing mounted for rotation, a seriesof blades carried by and movable with the casing, said blades having inwardly directed cutting edges lying in planes which are tangent to an imaginary cylinder whose axis is coincident with the axis of rotation of the casing, said casing be- .ing formed as an outlet serving to confine the force generated in the operation of the blades and to direct this force to and throughthe 5 outlet, whereby the chips cut by the'blades are compelled to move to and through the g outlet.

4. A hog including a casing mounted for rotation, a series of radially disposed, relatively spaced blades carried by the casing and having inwardly directed cutting edges lying in planes which are tangent to an imaginary cylinder whose axis is coincident with the axis of the casing, said blades serving to create an air pressure incident to their rotation, with said air pressure directed by the casing in a predetermined direction to compel the travel in the same direction of the chips produced by the blades In testimony whereof I aflix my signature.

GEORGE BABARE. a 3.

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