US1036390A - Pulp screening machine. - Google Patents

Description

0. WANDEL.

PULP SCREENING MACHINE.;

APPLICATION FILED MAR.11.19,12,

1,036,390 Patented Aug. 20, 1912.

UNITED sTATEs PATENT oEEioE.

OTTO WANDEL, OF WALPOLE, MASSACHUSETTS. AS'SIGNOR T0 WANDEL SCREEN MANUFACTURING COMPANY, A CORPORATION OF MASSACHUSETTS* PULP-SCREENING MACHINE.

Specification of Letters Patent.

Application tiled March 1l, 1912.

Patented Aug. 20, .1%. serial no. 683,142.

To all whom t may concern:

Be it known that I, Orro VVANDEL, of Walpole, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Pulp-Screening Machines, of which the following is a specification, reference being had to theaccom panying drawings, forming part thereof.

This invent-ion has reference to improvements in machines for screening pulp and particularly to such machines in which the pnl 3 screens are mounted in vibratory arms or tlrames of the generalriature described in Letters Patent No. 955, 25, granted to me April 12, 1910.

The present invention has particular reference to the improved means for limiting the movement of the arm or frame on which the pulp screen is carried.

One object of the invention is to so construct the cooperating members of a buffer device for limiting the vibrator-y movement of the screen carrying member that such device may be more conveniently located and accessible than as heiietofore constructed and that the wearing parts of said butler parts may be readily renewed.

Other objects of the inve tion will appear from the following descr ption.

The invention consists in the novel construction of buffer device and its combination with the frame and arm of a pulp screeninv machine of the n ature described.

The rawingr represents L viefvv in elevation of parts of the frange the screen carrying arm of a pulpI ycreening machine of the nature described l'i my said patent, parts of the-butter being broken away to show the spindle extending therethrough.

By reference to my above mentioned patentI it will be seen that machines of this nature comprise one or more cylindrical rotatable screens which are carried by pivoted arms or frames which, in operation, are caused to vibrate bytmeans of a'carn or cams to effect the agitation ofthe pulp taken up bysaid screens to facilitate the passing of portions of 'said pulp through the screens. In order to reduce the shock of such vibration on the frame of the machine buffers have been located between said arms to yieldingly resist and limit the return movement of said arms toward their cooperating cam, As the buffers, so placed,

are inaccessible on account of the surround- Vthe buffer 19 may ing mechanism and, when including rubber Aor other elastic cushioning material, are subject to deterioration from oil accumulating thereon from the bearings of such mechanism it has occurred to me to place such buffer devices at parts of the machine where such devices are readily accessible for inspection and renewal and, at the same time,

to improve the construction of such devices.

As shown in the a 1s drawings the frame similar to the frame 5 of said patent, and is similarly provided with the rocker arm 9 furnished with the cam-face block 12 against which throw cam 16 acts intermittently to throw outward the lower end of Said arm 9. Frame 5 has secured thereto the plate 6 having the stop 7 which plate 6 is located at a point on said frame toward which arm 9 is moved hyeam 1G. Arm 9 has a transverse bore which is in alinment with the bore 8 of stop 7 and secured in said bore of arm 9 is the spindle 10 having t-he shoulder' 11 and screw threaded ends which are respectively provided with the nuts 13, 14 and with thc lock nut 15. On said spindle 10 between the nut 14 and the stop G are the wear resisting plates 17 and 18 having located therebetween the rubber buffer 19 and, between plato 17 and nut 14,

the anvil or shock receiving member 20 which receives the blow from nut 14 on the rct-ractive movement of arm 9 and its spindle 10 while the elastic buffer 19 cushions said shock. By means of such construction I am enabled to plato this butler device in a position where its parts are always acens- -sible for renenal. By simply removing the nuts 14 and 15 the anvil Q0, plate 17 and be removed and the buffer, if worn, can be replaced by a new buier and the plate 17 anvil 2O and nuts 14, 15 replaced. When cam v1G acts against block 12 arm 9 is moved toward the stop 7 and spindle 10 slides in the bore of said stop While on thel reacting movement of arm 9 the nut 14 strikes the anvil 20 and the m act 'of such blow is er 19 and is resisted by the stop 7.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: l

In a pulpscre'ening machine, the combination with a frame having a stop furnished. with a bore,.of an arin carried by said frame and having a transverse perforation, a spincushioned by the bufdie mounted in said perforation and slid- 'to limit thel reverse movement of said spinable in the bore of said stop, an elastic bufdle by contact with said impact member, fer on said spindle, wear plates mounted substantially as described.

at the ends of said buffer, an impact receiv- OTTO WANDED. ing member mounted on said spindle and Witnesses:

bearing against one of said wear plates and VM. M. RINES,

a nut adjustable on said spindle and adapted W. M. PAINE.

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