USRE3358E - Improved lard-cooler - Google Patents

Description

@Huit-rd' (giedre @anni @Mire GEORGE OARLETON OAssARD, L. oAs'sARn, AND J. L. oAssARD, OE BALTIMORE,

MARYLAND, A rssIGNEEs OE GEORGE OARLETON oAssARo.

Letters Patent No. 78,925, dated .fame 16, 1868, reissue No. 3,358, dated April 6, 1869.

IMPROVED LARD-CQOLER.

The Schedule referred to in these Letters Pat-ent and making part of the name.

To all whom it'ma/y concern Be it known that I, GEORGE OARLETON GAssARD, of the -cit`y and county of Baltimore, and State of Maryland, have invented a'new and improved Anti-Granulating Lard-Cooler; and I do hereby declare that the following is'a full, clear, and 'exact description of the construction and operation of the same, reference being had to the-accompanying drawings, making apart of this specification, in which- Figurel is a vertical section through the line y y Of fig'. `2.

Figure 2 is a horizontal section through the lille :c :t of fig. 1.

Figure 3 is a detached view of one of the sorapers, ,with the spring by which it is supported.

The object of this invention is to enable lard to be rapidly cooled in large quantities, by machinery, in such a vmanner that it shall not grannlate, thereby improving its qnality.

'In the drawings- A A' represent the supporting frame, preferably of wood, the table upon which the tank rests being designated by the letter A, and that part of the frame which projects above saidtable, to support the shaft# ing and gearing, being represented by A'.

Bis a tu-b, or tank, the walls of which incline inward, as shown iu Iig. 1, giving the tank the form of a'frustum of a. coneA Within vthis tank is a vessel, C, of sheet-mctal-or cast-iron, the walls of which are cylindrical and vertical, its bottom being funnel-shaped to help convey the lard to the discharge-pipe, and terminating at its centre or lower extremity in a discharge-pipe, D, provided with a cock, E.

The side walls of the vessel O project slightly above the walls of the tank B, in order that any accidental overflow of the tank may not pass into the vessel.

The top or most contracted portion of the tank fits closely against the vessel all around it, but below that point, the walls of the tank recede from the vessel, leaving a space, F, between them.

The bottom of the vessel C, at its centre, rests upon' the bottom of the tank, leaving an extension of-the space F all around and under the bottom of the enclosed vessel.

' Pipes G H pass through the wall of the tank, and connect with this space, in Order to enable the operator to fill it .with cold water, or a current'of cold air,

and to regulate, at pleasure, the temperatureand quantity of the water in the tank around the vessel (l.

The tankand vessel C, being thus constructed and arranged, I hang a vertical shaft, I,- (which is made Vhollow if for air connection,) in the centre of -the vessel C, attaching it by boxes 'i i to the frame A', and providing collars, i t', above and below the boxes, to prevent the shaft from working up and down.

This shaft is connected, to the line-shaft J, by any kind of suitable gearing, as shown at K K;

Near the iower end Ot the suspended shaft I, two

horizontal arms, L L, (also hollow if for air con nection,) projecti'rom it nearly to the wall of the vessel C, each arm, when hollow, having a series of Openings, a a a, along its side.

The lower end I', of the vertical shaft, below the lorizontal arms, is always made solid.

I" is a tube, inserted intohe upper end of the tubular shaft I, through which air may be forced into the shaft, and from the latter through the arms L L and the holes c tinto the vessel C.

Directly beneath the arms L L are two strong arms, P P, extending from the -flower end of the vertical .shaft in a direction parallel to the bottom of the vessel G, beneath them, and terminating at ltheir outer eX- tremities in two`upright standards, P' P', which rise directly past the ends of the arms L L, and are soldered, bolted, or cast to those arms at that point.

The arms L L and P P serve to support a set of upright wooden slats, m m.

Another set, n yn, is attached to the cross-heam A overhead, and projects down into the vessel O, nearly to the hollow arms.

As the shaft I rotates, the slats m m are carried round, passing between the othe1's,1tn, and thoroughly .agit-ating the liquid contents of the vessel.

- In addition to these several parts, I attach a set of inclined rwooden Scrapers, yr lr, by means of bent springs s s, to the under side of the arms P P, and the outer side of the standards P'P', arranging the scrapers so that, as the central shaft rotates on its vertical axis, they will be drawn around upon the bottom and against theside walls of the vessel, thoroughly scraping the lard from the inner surface of the vessel, and preventing a deposit, or accumulation of cold lard upon that surface, while the lard at other points remains warm andfliquid.

The form and arrangement of these springs and Scrapers will be readily' understood by a glance at the drawings.

The apparatus being thus constructed, its operation is as follows:

The melted lard is introduced into the vessel O, filling the latter, as shown by the broken red lines of fig.l

1. At the saine time cold water, or a current of cold air is admitted at the connection, filling the space around the vessel C, as shown by the broken greenish lines, fig. 1. The shaft I is then started, and made to rotate slowly, thoroughly stirring up the molten mass,

rapidly and uniformly cooling the lard, and preventing its adhesion to the walls and bottom of the vessel.

When working very hot lard, as direct from the rendering-kettle, sometimes at 250O Fahrenheit, the cooling is assisted by a current of cold air from fanblower, or bellows, forced down the tubular shaft, escaping from the'holes a a, into the liquid lard at all vparts of the vessel, and rising through the la" d, rapidly v reducing its temperature to about 80o Fahrenheit, at which point it is withdrawn.

If thought advisable, to economize cold water, the

in the vessel C is one metallic surface brought into contact with another, so that any grinding or galvanic action will take place, whereby either black oil or corrcsion will ensue, discoloring or injuring the lard. in any degree.

It will also be observed that the scrapers, by keeping the walls and bottom of the vessel clean, prevent the deposit of a coat of cold lard, which would other- Wise accumulate there, and would seriously interfere with the conduction ofthe cold from the Water outside to the melted lard within.

`They also enable the lard to be more thoroughly drawn o from the vessel through the pipe D.

In aY large vessel, in which nearly two tous (three thousand seven hundred pounds) of lard had been cooled at once, I have found but about nine pounds, or oncfourth of one per cent. of the lard adhering to the bottom and walls of cooler, after running off the lard through discharge-pipe.

Having thusdescribed my invention,

What I claim as new, and desire to secure by Letters Patent, is`

1. The central lard-discharge D, when used in a lard-cooler, substantially as` and for the purpose set forth.

l Y .2. rEhe Scrapers R R, springs s s, arms P P, (supporting them,) or their equivalents, for the purpose specified.

3. The combination of the cylindrical tank C, en-

closed in the tank B, or other suitable arrangement to form the interval F, for the purpose specified, with the vert-ical (hollow or solid) shaft I, whose bearings shall be above said tank or its contents, all substantially as Y set forth. Y i

4.v The combination of the shaft I, the fixed slats n fn,- and the movable slats m m, supported by and rotated withthe shaft and its arms, and meshing beftween the fixed slats, when said parts are employed in connection with the vessel C and tank B, having the interval F, as described.

5. Thecentral discharge, in combination with the funnel-shape bottom` of tank C, or its equivalent, not restricting myself to either shape or material in construction, but all substantially as described, and fory the purpose specified.

GEO. OARLETON SASSARI).

Witnesses:

V. C. AnMsTnoNe, EDWARD MOORE.

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