USRE3153E - lafferty and robert lafferty - Google Patents

Description

I H. w. 8; R. LAFFERTY..

Centrifugal Sugar Machine.

Reissued' Oct. 6, 1868.

l a a m J 17106 ki o re" jyk'm K531783363. MM

UNITED STATES PATENT O ICE.

HUGH w. LAFFERTY AND, ROBERT LAFFnn-TY, orcLoucnsrnn, n. .T.'

IMPROVEMENT INCENTRIFUGAL MACHINES FOR DRAINING SUGAR, &c.

Specification forming part of Letters PalontNo. 77,054, dated April :21, 1868; Reissue No. 3, [53,datcd October 6, 186B.

.To all whom it may concern:

Be it known that we, HUGH W.- LAFFERTY and ROBERT LAFFERTY, of Gloucester, in the county of Camden and State of New J erscy, have invented 'a new and usefullmprovenient in Centrifugal Machines for Draining Sugar and other Purposes; and we do hereby declare the following to be a full and exact description thereoflreference being had to the accompanying drawings, forming apart of this specification, in which- Figure 1 is a sectional elevation of our centrifugal machine." Fig. 2 is an elevation of the suspending device; Fig. 3, a plan view of Fig;

2-;Fig. 4, a sectional elevation of a modified form'for the hollow shaft of the machine." Fig.

5, an enlarged sectional view, illustrat ng the connection and combination of the hollow stay-shaft with the inclosed solid driving-shaft of the cylinder of our machine; 1 v

Similar letters indicate like parts in all of theffigure's. v

The nature of our invention consists, first,

in providing a firm but elastic support or stay to the driving or revolving shaft or spindle carrying the cylinder or basket of a-centrifugaLdraining-machine at a point intermediate between the cylinder and the support or flexible bearings of the said driving-shaft, for the purpose of restraining the eccentricity of movement to which the cylinder is liable, and to prevent suchan undue strain or jar there of as would cause the shaft to break; second, in an improved elasticseat fromwhich to suspend the revolving driving-shaft carrying the cylinder or basket of the machine; third, in an improved packing joint and bearing forthe' stay applied to the driving-shaft; fourth, in

the application of a. brake to the lower endof the driving-shaft below the suspended cylinder; and,fifth,-in the-combination oft-here:

volving' shaft of our improved machine witlr the bottom of the casing of the cylinder. as

i found inthe ordinary forms of centrifugal machines, so as to admit of the advantageous application of our improvements to such old machines.

Our improved machine consists of a cylinder or basket, D, of any of the approved forms usually employed in centrifugal drain-.

ing-machines, and which is secured to and suspended upon a-solid vertical driving shaft 'tion of the cylinder in its'revolutions.

or spindle, S, in the customary manner, within an outer casing-E, of the ordinary form. The vertical driving-spindle S passes through the cylinder D, which is'secured thereto, and which extends down centrally through the bottom of the casingE into the open spacebelow the same. through which it passes is of such a diameter as to allow the spindle free play therein, but yet to restrict any excess in'the obicular moaperture may be advantageously lined with india-rubber or other elastic material.- The casing E of the machine may rest and be sup- 1 ported in the 'usual manner upon the floor.

The spindle or shaft S of they revolving cylinder D is suspended from and supported by a collar and sleeve, S L, 'fir'mly secured thereto ,near its upper end,-- and forming a' journal This journal-sleeve S L rests and therefor. works in suitable bearings formed within an oil-cup,C;embracing the same, the lower'pon. tion of the cup being extended into a neck closely embracing thesleeve S L, so as to provide it with an extended bearing-surface. The

oil-cup C thus made to constitute the bearing of the spindle or shaft S, and from which the spindleand'its cylinder D are suspended,,is

provided ext'eriorl-y with a flange, O L, or other device to support the same, and may be sup ported directly upon a fixed brace, B,abeam, or

other rigid support; but we prefer to support the same upon an elastic seat interposed between its bearings and such rigid hereinafter described.

To prevent the danger of a fracture of the solid vertical driving-shaft S from the effect of an unequal disposition of weight in its attached cylinder D and at the same time steady it and prevent in some measure the vibration ;and jar thereof found; in the ordinarycentrifugal machines, we provide an auxiliary elastic stay-bearing for the spindle 'or shaft S at a point intermediate between its-suspensoryflexible bearing and its attached cylinder. Such au'xiliarysupport,forthe'shaft may be obtained without obstructing free access to the suspended cylinder by placing upon the driving-shaft S a fixed hollow shafafl S, firmly secured with an elastic connection to a suitable support above.

In our improved machine we prefer to com--' Theaperture in the casing This.

support, 'as

bine the'support of "the. driving-shaft S with that of its auxiliary stay-shaft H S to obtain greater neatness and compactness therein. To this end we cause the upper end of the hollow stayshaft H S to. embrace closely the extended neck of the oil-cup 0, containing the bearings of the driving-sh ft'S, so that said cu shall rest upon and be supported by the hoflow shaft. The hollow shalt islthen uplied. and supported by meansofan. outer flange upon and about its upper edge, which restsupon athick heavy band or cushion, I D,

of man: rubber or other" elastic material,

firmly bound. and clamped against the same between the jaws'or divisions of a brace or hanger, B B,which may form part of abracket'to be secured in'abeam, A,.as illustrated inFigs. 2 and 3"of the drawings, or be other:

wise sustained from or between beams or standards provided for the support of the machine. The two divisions B B of the hanger are clamped together upon the rubber cushion I D by means of bolts and nuts b b, affording aifirm secure support therefor, yet admitting an ad ustment of the elastic tension of the cushion nponthe shaft H S- to regulate its rigidity. Itwill be observed that the elastic cushion TD, which forms aseat for the shaft H S,'1s extcnded and made to embrace a'considerable por ioii of the shaft, so that while it {permits a certain freedom of movement thereto, yetit offers a constantly-increasing resist ance to any departure of the shaft from a true 7 .1 vertical pcsition..... l.To' impart -this elastic. 1'61.

straining force to the driving supportiug-sha'ft of ltheicy linder l), so that it shall notonly prevent avibratio n thereof and restrain its cccentric movement. under the influence of an unequal distributionof weight in the cylinder, but also firmly support the same at its weakest point, we form a close. bearing between the lowerend of the hollow shaft H S and the central driving-shaft, Sgthe point of bearing and consequent .supportbeing fixed and determined at pleasure bythe length of To obtains-this desired" said-hollow shaft. I bearing, the lower end of the shaft H S is threaded exteriorly, and is. interior-1y beveled to form a conical seat, or is otherwise fit *tedwith a circular conical seat-e 0, to re;

ceive a split or divided conical washer, o o, in-

" serted therein and made to embrace the shaft I or spindle Sclosely. "This conical washer c o- I is held in place and forced upward in 'its'seat a bymeans of ahollow nut-creep, H N, throng which the spindle or, shaft Spasses, andwhic screws upon the thread on the exterior of the lower end of the hollow shaft.

g The; hollow nut maybe suitably packed to form a close joint, and it is evident that the-pressure, of

the conical washer a V 0 (thus forming 'a bearing between the stay-shaft H S and the driving-shaft S) upon the shaft S may be adjusted and stiffened or relieved at pleasure byscrewingor unscrewing said nut. The bearing is kept constantly lubricated by the oil passing down the spindle from the oil-cup 0- above.

To arrest the further passage of oil down the low the end of the hollow shaft H S.

Motion is imparted to the shaft S and'its cylinder D by means of a pull y. P, secured to its upper end. This pulley is made to exthespindle, as illustrated in Fig. 1, so as to bring the driving-belt placed thereon in the same plane as the point of suspension and support of the fixed hollow shaft and revolving shaft.

'Fig. 4"shows the shape we give the top end of our hollow shaft when we find it dc sirable in practice to have the elastic cushion D inside of the same interposed between it tion of the cylinder -D is maintained,'while a certain freedom to swerve under the influence of an unequal load is nevertheless obtained by through the aperture formed in thecasing E of the cylinder. The casings of the ordinary forms of centrifugal machines may be used with our improved suspended cylinderswithshaft S down"throug'h the bottom of the easdentalbreakage of, the spindle or shaft, for in supported by the casing.

' In order tocheclc the revol inder D in our machine, we apply a brake-to consists of aconvex button or head, S B, upon hear at pleasu Although-we prefer to re .by means of a "treadle-lever, obtain an interme di a point removed from thefiexible jointripon' iliary to or indepen at or near said joint-by meansof a hollow shaft arranged'as described, which affords "an ,elastic restraining forceboth at or near the point before described, yet we contemplate attain- "as, for instance, by diagonal or horizontal extending from outer supp the revolving shaft.

-'Having thus fully described our invention, what we claim therein; as new, aind desire .5 secure by Letters Patent,-is-- '1. In combination with theswinging .re'

orts to and against shaft S, awater-cup, c, is secured thereon be tend in cap form down over the bearings of and the solid shaft S. The horizontal posi:

an extension of the spindle or sh'aftS down' out alteration by a simple removal of the step,- and devices used in such machines for supporting the lower end ofthe spindle or shaft. The extensionof thc'lower end of the drivin'ging'prevents all danger of injury to-thc' operatives in charge of the machine from an accis hs h in e iis isl ee P e ution of the cylthe lowerextended end of the shaft S, as illustrated in Fig. '1' of the drawings. Thisbrake the "end of the shaft S', upon and against which a counterpart concavepiece, B, is brought to ate elastic stay or support. for the revolving shaft carrying the cylinder of our machine at or by which the shaft is suspended, either auxdent of an elastic bearing 7 of suspension, and alsoat thepoint ofgreat; 3 est strain upon the revolving shaft, as herein-.1 I

ing the same endby other equivalent devices-- braces, provided with elastic cushions, and

volvingshaft S of acentrifugal, drainin'g-machine, an elastic stay applied to said shaft at;

a point intermediate between its flexible joint or bearings and its vattached cylinder, substantially as herein set forth;

-2.' The combination of a fixed hollow shaft,

S of a centrifugal machine, to: afford stay or support thereto, substantially as herein set forth. I

3. The combination of an extended elastic ring or band, 1) D, with the outer upper end of a fixed auxiliary. stay-shaft, H S, combined with the revolving Shaft S of a centrifugal machine, to form a seat and stay for the sa ne,

' substantially as herein specified.

H S, and with a hollow nu't H N, working. against said washer, substantially as herein set forth.

5. A friction-brake, B, operating against the lower end of the driving suspending-shaft S of a centrifugal machine, substantially as herein set forth. H S,'with the suspending and driving shaft 6. The combination of I the lower extended extremity of the driving and suspending shaft S of a centrifugal machine with the bottom of --the casing thereof, substantially as herein set,

forth.

' 7. The combination of-a waste-cu'p, c, with the shaft or spindle S ofia" centrifugal machine, to prevent the passage of oil down into the basket of cylinder thereof, substantially :as herein set forth.

HUGH W..-IAFFERTY.

7 ROBERT LAFFERTY.

'Witnesses:

C. MULFORD, SAML. D. .MULEOBD.

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