US1686322A - Paper-making machinery - Google Patents

Description

Oct. 2, 1928.

c. L. HENDERSON PAPER MAKING MACHINERY I Filed April 17, 1925 2 Sheets-Sheet Rue/7357 w/"ZQSL. fzavzaanson Oct. 2, 1928.

C. L. HENDERSON PAPER MAKING MACHINERY Filed April l'i', 1925 2 Sheets-Sheet 2 SOLENOID 13 RECT/F/ER Patented Oct. 2, 1928.

. UNITED CHARLES In. HENDERSON, OF NEENAH, WISCONSIN, ASSIGNOR TO PAPER PATENTS COMPANY, OF NEENAH, WISCONSIN, A CORPORATION OF WISCONSIN.

PAPER-MAKING MACHINERY.

Application filed April 17, 1925.

This invention relates to machinery for making paper, but more particularly to screens or strainers for the purpose of removing from the pulp, all lumps or undigested stock which would show in the paper 1f permitted to remain. This screen 1S Of the fiat type in which the stock is caused to pass through slotted plates by the vibration of diaphragms.

The primary object of my invention is to produce a simple and effective mechanism for Operating the diaphragm which will increase the capacity of the screen, reduce the cost of contruction and maintenance,

and consume less power than existing mechanisms of a similar character.

Further objects are to provide noiseless operation, to permit repairs to the screen while in operation, to eliminate friction and the necessity for oiling parts, to reduce the amount of space required, to eliminate pulleys and belts, to provide a variable stroke independent of the speed, to provide more flexibility in arrangement, to provide balance of the moving parts, and in general to provide a new and improved screen-construction.

The many other objects and advantages of my improved screen or strainer will be better understood by reference to the following specification when considered in connec tion with the accompanying drawings illustrating a selected embodiment thereof, in which 7 Fig. 1 is a longitudinal section of a screen embodying the principles of my invention.

Fig. 2 1s a bottom plan view of the diaphragm operating mechanism shown in Fi 1 I Fig. 3 is a transverse section on the line 33 of Fig. 1. Fig. 4 is a diagrammatical view of the electrical connections of the operating solenoid. and

Fig. 5 is a fragmentary plan view.

Referring to the drawings, a series of slotted screen plates 10 are supported in the screen frame 11, above the vibrating diaphragm 12. The particular construction of this frame forms no part of the presentinvention, but in this embodiment comprises an upper receptacle 13 supported by a cen tral frame l on which the plates 10 rest, and a lower section 15. The diaphragm 12 of rubber or other suitable material, is held at the bottom to avoid choking.

Serial N0. 23,765.

between the central and lower sections. Any suitable form of base-or support for the screen may be provided. The plates extend between the cross pieces 16 and 16 of the central frame, and between these pieces and the end pieces 17, and are preferably slotted as at 18. The spacing and width of these slots may be varied but generally they are formed narrower at the top than termediate cross pieces 16 are preferably made narrower than the :others to permit the vibrating of the diaphragms in the manner which will be presently-described. A single diaphragm preferably extends under the entire screen but this diaphragm acts as a series of separate diaphragms 19 in view of the fact that the same is held between the cross pieces 16 and corresponding pieces 20 of the lower frame as at 21. The screen frame is generally constructed of wood though any other suitable material may obviously be used.

The mechanism forvibrating the diaphragm 19 will now be described. Plates as 30 and 31 are preferably placed on opposite sides of each of these diaphragms and secured togther by bolts as 32 which in the )resent embodiment also attach thereto rackets, 33, Downwardly projecting arms 34 are provided on each of these brackets and pivot or crank pins as 35' have their opposite ends suported in these arms. Adjoining diaphragms are operated by substantially T-shaped crank members as 36, two being preferably provided at each position. Each of these members has bearings as 37, formed at the extremities of the cross arm and the corresponding crank pins 35 extend therethrough. A casting as 38 supports an electromagnetic device, in. this instance a solenoid 39, and this casting is provided at each of the ends with oppositely disposed bearings 40 which support a pivot pin 41.. This pin passes through bearings 42 in the T-shaped crank members and such bearings ported in these bearings. Rods 45 connect these crank pins with the cores 47 of the The insolenoid and such rods are provided at their rent generator 51 wound to deliver current at a low frequency, for example, 10 to 15 cycles per second. This low frequency A. 0. current passes through wiring 52 to a suitable rectifier 53 which thus delivers a pulsating current to the solenoid. The cores of the solenoid preferably move approximately a small fraction of an inch, say %;th for each pulsation of the current. I

The diaphragms 1'9 are operated by the solenoid in the following-manner:As one of the rods 45 is forced outwardly, the de-' pending stems of the corresponding pair of T-shaped members are caused to rock about the axis of the pivot 41, imparting a similar rocking movement to the cross pieces of such members. This forces the corresponding outer diaphragm upwardly and draws the inner diaphragm downwardly. The flexing of the diaphragms returns the parts to nor mal position when the current impulse ceases, or if desired any suitable spring may be employed for that purpose. The same diaphragm action is provided by the other of the solenoid rods. It will thus be ob served that one diaphragm of each pair will be moving upwardly, while the other is mov ing downwardly and since the rods 45 are simultaneously reciprocated in opposite directions, oppositely disposed diaphragms are actuated simultaneously in the same direction whereby a balanced effect is obtained which greatly reduces the strain to which the screener is otherwise subjected.

Itwill be observed that the members 16 form, in effect, partitions between the separate compartments of the apparatus. Each compartment is thus provided with an upper screen and a flower separate diaphragm. By using separate screen compartments the diaphragms in adjacent compartments may be reciprocated in opposite directions so that a proper balanced actionmay be secured.

In the present invention waste of power is eliminated. The operation is substantially noiseless and repairs may readilv be made while the screen is in operation. The cost of construction and maintenance is materially reduced. All parts are in perfect balance,

and more flexibilityin arrangement is possible. The stroke may be varied independently of the speed.

I am aware that the form and arrangement or parts may be considerably varied without departing from the spirit of my invention and I reserve the right to make all such as fairly fall within the scope of the following claims.

I claim as my invention:

1. In a machine of the class described, the combination with a diaphragm, of means for imparting a vibratory movement to said diaphragm including an electro-magnetic device coacting with said diaphragm and means for energizing'said device.

2. In a device of the class described, the combination with a screen and a diaphragm for forcing paper stock through said screen, of means for imparting a vibratory movement to said diaphragm including an electro-magnet having a reciprocating core connected'to said diaphragm, and means for supplying pulsating current to the electromagnet.

3. A device for screening paper stock comprising a slotted plate, a diaphragm disposed opposite said plate for forcing the "stock through the slots in said plate, and

means for imparting a vibratory movement to sald dlaphragm including a solenoid havmg acore connected to said diaphragm. and

means for supplying pulsating current to the solenoid.

4. In a device of the class described, a screen for straining the paper stock, 21. vibratory diaphragm opposite said screen for drawing the stock through said screen, and means for actuating said diaphragm including a solenoid and a core connected to said diaphragm and actuated by said solenoid.

5. In adevice of the class described, a

screen for straining the paper stock, a vibratory diaphragm disposed opposite said screen for drawing portions of the stock through said screen, and means for actuat' ing said diaphragm including a solenoid, a reciprocating core for said solenoid, and a.

crank arm connecting said core with said diaphragm.

6. In a device of the class described, a screen for straining paper stock, a vibratory diaphragm disposed opposite said screen for drawing a portion of the stock through said screen, and means for actuating said diaphragm including a solenoid having its axis substantially parallel to the plane of the diaphragm, a core within said solenoid and movable thereby longitudinally of said axis,

and a bell crank connecting said armature with said diaphragm.

7 In a device of the class described, the

combination of a screen, a pair of diaphragms, each disposed opposite a diflerent portion of said screen, means for simultaneously imparting movement in the same direction to said pair of diaphragms comprising a pair of operating rods disposed substantially in longitudinal alignment relative to each other, and means for imparting movement to said rods simultaneously in opposite directions.

8. In a device of the class described, a screen for straining paper stock, two pairs of diaphragms each diaphragm being disposed opposite a different portion of said screen, bars connecting said diaphragms of each pair, said bars'being pivoted intermediate their points of connection with said diaphragms and having an arm extending therefrom, a separate rod connected at the, end to each of said arms and means for imparting simultaneous movement to said rod in opposite directions.

9. In a device of the class described, a screen for straining the paper stock, and means for drawing a portion of the stock through said screen including a pair of diaphragms each disposed opposite a different portion of said screen, a bar connecting said diaphrag'ms and pivotally supported midway between'the points of connection, an arm extending laterally from said bar at said midway point and forming with said bar a substantially T-shaped member, and

combination of a screen, a pair of diaphragms, each disposed opposite a different portion of said screen, means for simultaneously imparting movement in the same direction to said pair of diaphragms comprising a pair of bell cranks pivotally mounted intermediate their respective arms on a fixed portion of the device, and each having one arm pivotally connected respectively to one of said screens, a pairof oppositely disposed and substantially longitudinally aligned operating rods, each having one end pivotally connected respectively to the other arm of said bell cranks, and means for efiecting longitudinal movement of said rods simultaneously in opposite directions.

11. In a device of the class described, a screen for straining paper stock, a plurality of diaphragms for aiding the straining operation, and means for actuating said diaphragms comprising a pair of operating rods reciprocatingly actuated simultane ously in opposite directions.

CHARLES L. HENDERSON.

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