US1679057A - Beating engine - Google Patents

Description

L. SHLICK HEATING ENGINE July 31, 1928.

Filed Jan. 19, 1927 2 Sheets-Sheet 1 Inve n Z54, Leo ShZicR u vii-Hami n/fl//////////// L. SHLICK BEATING ENGINE July 31, 1928.

2 Sheets- Sheet 2 Filed Jan. 19', 1927 m, n H M ww 7// W h r M 1 S w b a www. KW w my m 1 pa1ts thereof, of solid concrete Patented July 31, 1928.

,UNITED STATES PATENT OFFICE.

LEO SHLICK, OE BOSTON, MASSACHUSETTS.

BEATING ENGINE.

Application filed January 19, 1927. Serial No. 162,191.

portions of the building.

' In carrying out this improvement, I form the foundation of the beating engine, and preferably the tub itself and some other to constitute an integral whole.

Other improvementsrelate to a more perfect balancing of the beater roll; a better shaping of the fly-bars; a more reliable means for automatically shifting the deflector when the beater roll jumps; and to various other improvements in details of construction. r

In the drawings forming .part of this specification, Fig. 1 is a side view of a beating engine embodying my improvements. Fig. 2 isv a detail View of the beater roll. Fig. 3 isa plan view in diagram of the beater tub. Fig. 3 isv a transverse section of the beater tub. Fig. 3 is anend view of one form of the fly bars. Fig. 1 is a side sectional elevation of the tub. Fig. '5 is a side sectional elevation of the tub from the opposite direction to that of Fig; 4. F ig. 6 is a detail view of the. deflectorcontrolling device. Fig. 7 is a sectional view of apart of said device.

To prevent jarring the mill, foundation pillars 1 are sunk deep into the ground,

and upon them are located a foundation 2.

and the beater tuli- 3, all being preferably of concrete and hardened into an integral whole. The hood 1 is preferably made of concrete, together with the back-fall 5, and

integral with the tub.

The floor 6 is made to closely surround the tub 3 but. not in contact therewith, and is elevated to enable a man of ordinary stature to see down into the tub and to note the, condition of the stock. therein.

' hood 1 is given a concave under surfacelO in order freely to direct on back of the backfall the stock shot upward by the beater roll;

- this surface terminating-in a vertically adjustable gate ll-designed to have itslower tially level around to the beater'roll.

gdige below the level of the crest of the back- As shown in Figs. 4 and 5, the floor of the tub. immediately at the foot of the back fall is considerably higher than the floor approaching the beater roll, and slopes down from its highest point to approximately the niidlength of the channel 12. This is further shown in Fig.8, where the level start ing from the foot of the back-fall 5 slopes downward to the dotted line in the channel 12, from which point the floor is substany means of this downward pitch 13, additional to that of the back-fall, a current is given to w the flowing stock much faster than 15 otherwise possible, and consequently the engine can accomplish so much more work in the same time.

The action of the beater roll 9 is considerably aided by the hinged hood 14 which is adjustably secured in place with its lower edge close to thebeater roll, by means of a bolt and slotted elbow 15, 16. This hood serves to prevent the fly-bars 17 from striking the surface of the incoming stock and thereby so agitating the mass and intermixmg air therewith as tointerfere with the proper functioning of the fly-bars and the bed-plate 19. The hood also directs the flow of the stock past the bed-plate more uninterruptedly. ,As shown in Fig. 2, the fly-bars .17 are-held within the longitudinal slots of the roll Sbymeans of an annulus 18 bolted to the end of the roll, each bolt being mid way, between two adjacent fly-bars.

The action of the beater roll is further aided by inclining the fly-bars rcarwardly instead of radially. Previously, the slots 20 in the roll were inclined and the fiy-bars made flat, but such angular arrangement of the slots is much more difficultto produce than a radial arrangement. Hence, by forming each fly-bar with an angular bend so that the-base 21 of each Wlll be capable of being fastened in such slots 20, the blades 1'? will have the desired inclination while the slots are radial. i

Each end of the shaft 7 of the beater roll has its.bearings.supported by a lever 24 pivotally supported at 2,5 and adjustably supported near its other end by a. screw rod 26 having a nut 27 turned by a hand wheel 29, and suitable connections. To enable one hand wheel and screw rod at the front of the tub to control both levers 24:, a cross;

shaft 30 is provided having a crank arm 31 and connecting rod 32 for each lever.

Beside each lever 24 is a second lever 33 pivotally supported at 28 and adjustably linked at one end with the free end of the lever 24, the adjustment being provided by a turn buckle 34. Upon the opposite end of the lever 33 is located a weight 35 varied in its effect by moving it longitudinally along the lever, and fastening it in position by a screw 36. By varying the leverage of the counterweight 35, the lever 24 and conse quently the beater roll 9 are given a lessened or increased pressure, as may be desired for the quality of thestock being treated.

It is essential to have the deflector 4O presented as closely to the beater roll as possible, in order to reduce the amount of stock carried over by the latter; but frequently the proximity of the beater roll to the bed-plate must be varied in accordance with the char acter of the work, such adjustment being performed by turning the hand wheel 29 by which the levers 24 are raised and lowered. By connecting the levers 24 with the deflector 40, the raising and lowering of the levers will correspondingly shift the deflector. But it often happens that, owing to lumps of the stock coming between the flybars and bed-plate, the beater will be given a sudden upward. throw with consequent danger of striking and catching upon the deflector and causing a great amount of damage. To prevent this, a bar 41 is provided whose lower end is almost in normal contact with the upper surface of the axle or shaft 7 for each end of the latter. This bar is adjustably attached to a rod 42 whose upper end is connected with a crank arm 43 having a projection 44 engaging the deflector. The rod 42 is slidable within a cylinder 45 and has a shoulder 46 between which and an end of the cylinder is a helical spring 47. A rod-section 49 is attached to the levers 24 and alsotothe lower end of the cylinder. The lower end of the rod 42 normally rests upon the end of the rod-sec tion 49, in order for the upward movement of the lovers 24 to raise the deflector 40; the springs 47 drawing the latter down as the levers are depressed. Now, whenever the beater roll 9 jumps, either at one or both ends, the axle engages one or both bars 41 and forces them upward, thereby similarly pushing the deflector upward; the springs 47 yielding to the movement thus given to the rods 42.

As shown in FigsB and 4, the fly bars 17 are of uniform thickness from their cutting edges to their juncture with the roll 9, in order that as the cutting edges wear down they will remain of the same thickness as at first, and will hence not vary in operative efficiency in their action upon the pulp.

Instead of having the fly-bars 17 individually attached to the roll 9 as above de scribed, I sometimes have them formed as integral parts of a plate 51, as shown in Fig. 3 fastening these plates to the periphery of the roll, but not changing their uniformity of thickness.

In Fig. l, a cam 52 is shown as controlled by a hand-wheel 53 for varying the pressure upon the lever 24 and thereby adjusting the action of the engine to different grades of stock. For example, when the tub is first filled and the stock is heavy and lumpy, the cam 52 is turned to present a lesser radius to the'lever 24; then as the grinding progresses, the cam can be turned to press the lever downward and thereto to present the beater roll closer to the bed-plate.

I have discovered that by making the tub channels substantially circular in cross section, illustrated in Figs. 8, 4 and 5, the flow of the stock along the same is made swifter than would otherwise be the case. This is largely due to the reduced surface presented thereto by a cylinder, and the consequently lessened surface-friction; but largely, also, to the decreased opportunity for the deposit of obstructive sediment, as is sure to occur where there are corners.

What I claim as my invention is:

l. A beating engine comprising a tub having a midfeather, a heater roll, a bedplate and a back-fall, the back-fall rising to a point above the level of the aXis of the beater roll, a hood located above the backfall, and a gate depending from said hood to a point below the level of the crest of the back-fall.

2. A beating engine comprising a tub, a beater roll, having a supporting shaft, a pivotally supported lever for each end of said shaft, a vertically movable deflector close above said heater roll, and adjustable connection between said levers and deflector for giving said levers and deflector simultaneous and corresponding movements.

3. A beating engine comprising a tub, a beater roll, having a supporting shaft, a vertically movable support for said shaft, a vertically movable deflector located above said roll, and means whereby an upward movement of said support gives an unyielding upward movement to said deflector, but a yielding downward pull thereto.

4. A beating engine comprising a tub, a beater roll having a supporting shaft, a vertically movable support for said shaft, a vertically movable deflector located close to said roll, means whereby an upward movement of said support gives an unyielding upward movement to said deflector but a yielding downward pull thereto, and a longitudinally movable bar terminally close to the periphery of said shaft and connected with said means, whereby an upward jump of said roll and shaft gives to said deflector a corresponding movement independently of the adjustment of said support.

5. A beating engine comprising a tub, a beater roll having a supporting shaft, a pivotally sup-ported lever sustaining an end of said shaft, means for vertically adjusting the free end of said lever, a longitudinally movable deflector located close to said roll,

means for transmitting the adjustment of said lever to said deflector, comprising a cylinder, a helical spring therein, a rod slidable in said cylinder having a shoulder confining said spring between itself and an end of said cylinder, and a bar presenting an end to the periphery of said shaft and connected at its other end with said defiector.

6. A beating engine comprising a tub and a beater roll, the latter consisting of a drum having its periphery longitudinally slotted, fly-bars located in said slots, and an annulus attached to the end of the drum, the attachment consisting of bolts each of which penetrates the annulus halfway between two adjacent fly-bars.

7. In a beating engine, a tub having a the opposing surfaces of each slot being parallel, and fly bars having bases fitting said slots and blades each bent at an angle to its base, both surfaces of each blade making an angle in excess of eight degrees with respect to its base. i

9. A beating engine comprising a tub, a

beater roll, a bed-plate and a backfall, the

latter rising to a height above the level of the axis of the beater roll, a hood located above the back-fall, and a vertical gate 1 slidably held by the hood to present its lower edge 'beloW the level of the crest of they back-fall and havingrneans for adj ustably retaining it at different heights.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 18th day of January, 1927.

LEO SHLICK.

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