US666089A - Paper-stuff pump. - Google Patents

Description

No. 666,066.` Patented 1an. i5, 190|. l. P fmLLoN.

PAPER STUFF PUMP.

(Application led Nov. 14, 1899.)

.(No Model.)

More STATES PATENT FFICE.

IRWIN I). DILLON, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR OF ONE- I-IALF TO HENRY O. KING, OF SAME PLACE.

PAPER-STU FF PUMP..

SPECIFICATION forming part of Letters Patent No. 666,089, dated January 15, 1901. Application tied November 14, 1899. smalto. 736,906. iNo model.)

To @ZZ whom t may con/cern;

Be it known that I. IRWIN P. DILLON, acitizen of the United States, residing at Lawrence, county of Essex, and State of Massachusetts, have invented an Improvement in Paper- Stuff Pumps, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The present invention is an -improvement in paper-stuff pumps such as are used in paper-mills for pumping up the paper-stu, the pump as herein partially shown being of the ball-valve kind, in which a rising and falling ball or sphere operates to open and close the valve. In such pumps the valve-seats wear out rapidly because of the incessant pounding thereon of the valves, and also the valves themselves frequently wear out, and as heretofore constructed these parts have not been readily accessible, and it has been necessary to take the entire pump more or less to pieces, and, in fact, in many cases to remove the pump itself when either of its parts is worn out in order that they may be remedied or the pump replaced by a new one, thereby incurring much delay and considerable expense and trouble.

My invention has for its object the provision of means for the instant removal of the valve-seat, either for inspection or repair or for the replacing thereof by another one, and

means for the instant removal also of the valve when required.

In the drawings, Figure 1 is a vertical section on line l l, Fig. 2, of a portion of a pump, sufticient details being shown to enable my invention to be understood. Fig. 2 is a horizontal sectional view taken on the line 2 2, Fig. l.- Fig. 3 is a horizontal view taken on the irregular line 3 3, Fig. l.

As herein shown, the inlet for the paperstuif or other material which is to be pumped is located at or in the base a of the pump, and the piston a2 is indicated at the upper end d3 of the frame, my special valve-box b beinglocated between these parts. The ballvalve b', normally closing against its seat b2, rises to permit the flow of pulp out through the .outlet hs to the other part of the pump. (Not herein shown.)

in the form of a ceutrally-apertured wedge' block or plate b5, which is also placed in the recess or pocket b4, said tightening means being normally connected by a bolt h6 and nut 197 to a cap or plate bs, secured to the front of the recess b4 by suitable means, as by nuts b9, said cap or plate also preferably serving to close said recess tightly. At either side of the bolt h6 are set screws or bolts Z910 for properly alining the wedge block b5 and wedging it tightly into proper position.

The class of pumps in question are used to convey paper-stuff, which, as is well known, is quite heavy and thick, so that when the valve is about to descend the backward flow of the stu tends to accelerate the movement ofthe valve, and thereby increase the damage dueto pounding, and, on the other hand, inasmuch as the stuff is slow to move at the best itis necessary that the valve should be raised readily from the valve-seat, and accordingly I make the valve hollow, as indicated in Fig. l, so that it will rise readily from its seat and will likewise fall with the least momentum. Furthermore, this class of pumps as heretofore 'constructed give considerable lateral play to the valve, so that the latter does not always descend properly upon the valve-seat, but especially because of the lateral backward movement of the stufn while the valve is descending the valve strikes most frequently and severely upon the left-hand side of the valve, Fig. l, and accordingly I have provided the valve-seat with shoulders 512 in order that it may always maintain an accurately-centered position irrespective of the position of the wedge b5, and coperating with the shoulder Z912 and with the valve b' I provide a plurality of directing or seating ribs Z213, these ribs being herein shown as four in number. As, therefore, the valve rises and falls it is obliged to follow the same path in- IOO variably, irrespective of whether there is a severe side pressure due to the back HOW of the pulp or not. Furtherlnore, I have found that the Valve is quite variable in its movements, so that at times it will rise to such an extent that when it falls it pounds the valveseat unduly, and accordingly I have provided an Overhanging bar or stop 1914, herein shown as extending from the upper end of one of the ribs 1913. This feature of the invention is Of considerable practical importance for the reason that while it permits sufficient movement of the valve from its seat it prevents the valve from rising so far as to injure the valve-seat unduly by its fall.

In Order 'that the valve-seat may be quickly inspected at any time wit-hout removal and that the valve may be removed quickly without taking the pump to the maker, l have made the front 1915 of the valve box or chest removable, and also inasmuch as the stop 1914 is pounded considerably by the valve I have mounted the same upon the removable part 1915. These parts are held in by a yoke 1916 and bolt 1917, the yoke being secured by bolts and nuts 1918 tO the-frame Of the machine, as shown in Fig. 2.

In use if a valve becomes injured Or anything becomes permanently lodged on the valve-seat so as to prevent the proper closing thereof the face-plate or front 1915 is quickly removed and the valve taken out and re paired or the valve-seat inspected and cleaned, whereupon the valve, Or if the latter is broken another one, is at Once put in place and the front mounted again in position, whereupon the pump can resume its work, all with Only a few moments delay. If now the valve-seat should become worn down too thin for practical use Or should become broken Or injured in any way, the cap or plate hs is loosened from the bottom frame and the tightening means 195 pulled out, so as to permit the valveseat to be lowered and removed from the recess 194, whereupon another valve-seat may be quickly inserted and wedgedA into proper p0- sitiOn by the wedge-block 195, said valve-seat automatically centering itself by reason of its conical iiange 1912. This iange also provides a considerable depth Ofvmetal to be worn away before the seat becomes useless'.

The valve being hollow and weighted tO correspond to the quality and density of stu being pumped rises readily and falls with a minimum VlolOW upon the seat, being always sure to strike the seat accurately because of the direction-ribs 1913 and the accurate centering of the valve-seat relatively thereto.

I do not intend to restrict myself tothe details herein shown and described otherwise than as hereinafter expressed in the claims, inasmuch as very many changes may be made without departing from the spirit of my invention, nor do I intend to restrict my invention in all cases to a pump used for paperstuff. j

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A .pump having a valve-chamber containing a guided valve, and an independent recess opening externally beneath said valvechamber, a removable valve-seat located in said recess and independent of said valvechamber and provided with centering means for guiding said valve-seat into centered position and shifting the same when necessary relatively to said valve and transversely of the valve-chamber in being tightened into passage between said valve-chamber and the pump passage below said chamber, said wedge block having its upper face correspondin g in inclination to said valve-seat and having its lower side in the same plane as the bottom of said recess, said valve-seat and block coperating with said chest and recess to form aclosed passage.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

IRWIN P. DILLON.

Witnesses:

GEO. H. MAXWELL, GEO. W. GREGORY.

IOO

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