US2337404A - Device for tightening wood barking drums - Google Patents

Description

Dec. 21,1943.

R. D. NEWTON I r 2,337,404,

DEVICE FOR TIGHTENING WOOD BARKING DRUMS Filed Nov. 12, 1940 2206M D. fi/ewzop 2 Shets-Sheet 1 Dec. 21, 1943. R. D. NEWTON 2,337,404

DEVICE FOR TIGHTENING WOOD BARKING' DRUMS V 2 Sheet-Sheet 2 Patented Dec. 21, 1943 f UNITED STATES PATENT oFFlqE v DEVICE FOR TIGHTENING WOOD BARKIN DRUMS Robert D. Newton, Moss Point, Miss. Application November 12, 1940, Serial No. 365,334

2 Claims. (01. 144-208) I normally imposed upon the channel securing The present invention relates to apparatusthat is adapted to remove the bark from logs, and more particularly has reference to a wood barking drum that is provided with means whereby the drum can be tightened. While my inventive concept finds particular application in connection with wood barking drums, I wish it to be understood, however', that it can be employed to tighten other types of apparatus in which the longitudinal channel bars forming the circumference of the-apparatus may be tightened.

At the present time wood barking drums comprise channel bars or V irons that form the circumference of the drum, and these irons are secured to a plurality of rings by means of bolts or rivets, etc. The initial cost of a wood barking drum isvery high and, in addition, the cost of'the upkeep of these drums is a verymaterial item. In operation, due to the rough usage to which the drums are put, a tremendous strain is imposed on'the rivet or bolt heads, and the vibration of the channel bars has caused-loosening or breakage of the rivets or bolts with the attendant disadvantages. Of course, many attempts have been heretofore made to provide same means whereby rivet and bolt breakage could be obviated, but to the'best'of my knowledge no feasible practice has been proposed.

One object of this'invention is to overcome the defects now in the art.

Another object of this invention is to provide a tightening device for wood barking drums of either the channel or V iron type that is simple in construction and operation, and that can easily be repaired or replaced.

Yet another object of this invention is to provide a tightening device that will cause the channel or V irons to be brought into close contactwith the supporting rings, thus holding the channel or V irons rigidly inthe proper position,

Yet a further object of this invention is to provide a tightening device for wood barking drums of the type herein described that will elim-, inate the vibration of the channel or V irons,v thereby preventing loosening or breakage of the members.

In the drawings, in which like numerals designate the same or similar parts:

Figure 1 is a transverse sectional view of a portion of a wood barking drum of the channel iron type showing my novel tightening unit in position.

Figure 2 is a fragmental top plan view illustrating the construction shown in Figure 1.

Figure 3 is a transverse sectional view of a portion of a wood barking drum of the V iron type showing my novel tightening unit.

Figure 4 is a fragmental top plan view of the unit illustrated in Figure 3.

Referring to the drawings, and more particularly to Figures 1 and 2, I have shown a wood as shown at 9.

rivets or bolts securing the irons to their supporting rings. K

- I prefer that the body portion l barking drum I, the outer circumference of which comprises a plurality of longitudinal channel irons 2, each of which is spaced longitudinally from the other to define a longitudinal space or slot 3 through which the pieces of bark removed from the logs may be discharged. Each.

channel iron is adapted to be secured to iron rings 4 spaced at proper distances along the length of the drum, one of which is illustrated in the drawings. As best shown in Figure 2, each channel 2 is secured to the ring 4 by means of a saddle 5. The saddle 5 is bolted to the flange of the ring 4, as indicated at 5, andto the channel 2, as shown at 1. Obviously other modes of attachment for aifixing the channels to the rings can be employed in lieu of that herein described.

To impart rotary movement to the drum, aring gear 8 is provided and the channels can also be secured to this gearby means of a saddle such pinion (not shown)" which is driven by a suitable prime mover (not shown).

As previously pointed out, a great strain is imposed upon the securing means 5 during the operation of the drum I with the result that the securing-means, due to the vibration of the channels 2, becomes loosened or broken. This loosening or breaking of the securing devices often results in the impairment of the channels 2, and it has been a real problem in the art to try and ofiset this objectionable feature of apparatus of this type.

After considerable work in'the field,- I discovered that the channel irons could be maintained in a rigid position and notbecome loosened by disposing a wedge member ID in the slot 3 between the flanges H of adjoining channels adjacent to-the ring 4. The wedge l0 comprises a body portion l2 Which-tapers from .top to bottom and which is formed with a bore 13. 2 be of steel although other materials, such as cast iron or The ring gear meshes with a the like, may be used. A bolt ll extends through .the bore l3 and a washer I5 is disposed between adjoining channel irons 2 and the bolt head. The

washer has a countersunk portion |6 into the 10 side the channel or V iron to'compensate for.

The wedges I II are located at the positions which are subjected to the most strain and, as mentioned, they are located adjacent the supporting rings 4, since it has been found that considerable strain and stress is placed at-these positions.

In practice the wedges are positioned around the entire circumference of the drum before the bolts II are tightened. Obviously when the-bolts are tightened, the tendency is to spreadthe space 3 between adjoining channels 2, but the wedges besidethe adjoining channels will prevent this and force the channels to move outward against the saddle 5. If the wedges were not installed in each space around the circumference of the drum I, this spreading action would occur and the desired results would not be achieved. ter each wedge is in position, the nut I8 is tightened, thus forcing the channels 2 outwardly against the rings 4 by expanding the circumference of the circle ofthe channels 2. I .have also found it most advantageous to tighten the bolts 14 the bolt 38 of each wedge member the V bars ll effect the expansion of the circumference of the circle of the V bars, thus causing the V bars to .be moved tightly against the supporting rings In the event the wedges I0 and 35 are moved down to the position where they contact the washers l5 or 38, respectively, they may be removed and a thin metal shim can be placed alongthe wear. I might mention, however, that this condition should not occur except in cases of breakage or neglect as the channel and V irons and the wedges form a solid adjustable circle of metal.

It is believed readily apparent from the above description tha I haveprovided a very effective means for main aining the longitudinal channel or V bars forming the outer circumference of a wood barking drum in a rigid position against the supporting rings. By the use of my novel wedge construction it is, possible to prevent the belts or rivets from becoming loosened or broken during operating conditions with the. attendant 5 saving in the upkeep of thedrum. The device is very simple'in construction and can be used in connection with all channelor-V iron type drums and can be installed with relative ease. The device is positive in action and can be replaced or repaired in a minimum of time.

While I have shown and described the preferred embodiment of my,invention, I wish it to be understood that I do not confine myself to the precise details of.construction herein set forth by way of illustration, as it is apparent that many gradually, as this preventdistortion of the breaking of rive'ts or bolts. 1

In Figures 3 and 4, I have shown my invention used in connection with a barking'drum 30, the outer circumference of which is formed of longitudinally V'bars 3|. While the drawingsdo not illustrate specifically the mannerv in which the V bars are fixed to supporting rings 32, these bars can be attached in any desirable manner such as, for example, by rivets, bolts or the like.

- In Figure '4 it will be noted thata bracket 33 is welded to the upper faceof the V bar 3| at a point adjacent to the supporting ring' 32. In

edge The flange portion-of members 33A and 33B tapers slightly from top to bottom which forms.

other words, the brackets 31 are disposed at the positions where the barshre subjected to the greatest strain. The bracket 33 comprises comchanges and variations'may be made therein, by those skilled in the art, provided they do not depart from the scope of the appended claims.

I claim: I v

1. A wood barking drum comprising a plurality of spaced axially aligned rings, a plurality of circumferentially spaced bars extending longitudinally of the drum within the rings, means connecting the bars to the rings, a plurality of radially of the drum, a washer on said bolt and engaging the inner surface of said bars, said wedges and associated bolts andwashers being spaced apart axially of the drum to maintain plementary'angle'irons 33A and 333,, each oneof which is secured along the free longitudinal of adjacent V bars.

in effect, a tapered slot 34. v I

A tapered wedge 35 similar in construction to the wedge l0 shown in Eigure 1 is disposed in the slot 34. A bolt 36 is positioned in a bore 31 formed in the wedge and a washer 38 is disposed between the bolt head and the lower wall of the adjoining V bars. A nut 39 is threaded on to the upper free end of the bolt. I

v The operation of this particular embodiment is thought readily apparent, and by tightening gagement with t e rings.

open the spaces between the bars and a nut on each bolt for drawing the wedgestoward the washers to force said wedges between said bars 1 to spread the bars circumferentially and force them radially outwardly into engagement with the rings.

2. A wood barking drum comprisinga plurality of spaced axially aligned rings, a plurality of circumferentially spaced bars extendinglongltudinally of the drum "within the rings, means connecting the bars to the rings, a plurality of wedges interposed between adjacent bars, anchors bridging the spaces between adjacent bars and lying in contact with one face of the bars, said 5 v wedges and associated anchors being spaced apart axially of the'drurn to maintain the spaces open between the bars and ad.) 'lstable means cooperating with the anchors and wedges for forcing the wedges bftween the adjacent bars toward the anchors ending to spread the bars ,apart and forcing them radially outwardly into tight en- ROBERT D. NEWTON.

wedges interposed between adjacent bars, a boltextending through each wedge substantially;

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