USRE1565E - Improvement - Google Patents

Description

F. D. DRAKE.

Eyaporating Pan.

Reissued Nov. 10, 1863.

a m w i w Q m w .C m E w w m w` w m m m W Witnesses,

MM t M AM. PHOTO-LITHIL. N Y. (SBDRNE'S PROCESS.)

PATENT Ormea 5 F. D. DRAKnfoF nonni oonn'n'ns, o'H-ro;

d IMPROVEMENT" IN EvAPoRAToRs FOR sAcCHARllN-E Ll'QU-rns".

l Specification forming part of Letters Patent No. 37,339, dated January 6, 1863 Reissue No. 1,565. dated November 10, 1863.

To ai?, whom, it may concern.-

Be itknown that I,F. D. DRAKE, of Four Corners, in the county of Huron and State of Ohio, have invented a new s and Improved Evaporator for Saccharine Liquids; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in

which- Figure 1 represents a longitudinal vertical section of my invention. Fig. 2 is a transverse vertical section ofthe same. Fig. 3 is a plan or top view of the same, the pan being indicated in red outline.

Similar letters of reference in the three views indicate corresponding parts.

This invention consists in the employment or use of a furnace with a return flue or iiues in such a manner that the heat applied to the liquid in the pan is graduated from the highest temperature in one portion of the pan down to below the boiling-point in the other por.-

' tion or portions, and that thereby the same is thrown off toward the coolest portion or portions of said pan, whence it can easily be removed and the danger of imparting an unpleasant taste to the molasses by boiling the sap in the mass is obviated; and, furthermore, a saving of fuel is effected.

To enable those skilled in the art to make and nsemy invention, I will proceed to de- A represents a furnace which is built up of brick or any other suitable material, and to which access is had through the fire-door a.

' The re is made on the grate b, and thence a fiue, c, extends back to the rear end of the furnace, returning through the middle to the front end, and then back again on the opposite side of the furnace to its rear end, where it terminates. The course of this return-fine may, however, be'changed at pleasure, either crosswise or lengthwise, and in the drawings its course and that of the products of combustion is indicated by arrows in Fig. 3.

B represents the evaporating-pan,which is made of wood with a sheet-metal bottom, or which may be constructed in any other suitable manner. It is placed on the top of the furnace A, so that its whole bottom, with the exception of those portions right over the partitionlwalls of the ue, is exposed tothe direct action of the heat, and said pan is divided into a series of compartments, d ef g, by partitions h e' la', which extend from one side of the pan to the other. The several compartments communicate with each other through openf ings hf 7c', which may be closed by gates,so that the current of liquid through them can be regulated. These openings are nearer to one side of the pan than to the other, as clearly shown in Fig. 2 of the drawings, and the pan is placed on the furnace in such a position that said openings are over the hottest part of the furnace or of the liuc c.

The juice is admitted into the pan at that corner farthest from the grate b and nearest to the chimney, where the temperature in the pan is the lowest, and in passing through the compartment d to the opposite' or hottest side of the pan it (the juice) is gradually raised to the boiling-heat, and the scum, which rises to the surface, is thrown back to the coolest part Y of the pan, where -the temperature is below the boiling-point. By having the openings h i k on the hottestside ofthe pan all the juice is compelled to pass to that side, and in every compartment the scum, which rises when the boiling commences, is thrown toward the cool side of the pan, where it can readily be removed. By these means all the scum is made to collect on that part of the pan where the temperature is below the boilingpoint, and the danger of imparting an unpleasant taste to the molasses by boiling the scum or acrid matter with the liquid is avoided. Fnrthermoraby having the scum co1- lected on one side of the pan, the labor of removing the same is reduced, and can easily be attended to by one person, whereas wit-h such pans, where the scum collects on both sides, it requires two persons to remove the same;

or if one person attempts to do it it requres much labor and exertion in running from one side of the pan to the other. The return-fine may, however, be so arranged that the scum collects at the end or ends, or at both sides of the pan, and with pans of very large capacity this arrangement may be preferable. v

By the use of the return-f1ue a considerable saving in fuel is effected, the heat of the nre being made to pass several times backward l The return-flue C, applied vin combination and forward under the pan before it is alwith the furnace A,andbpan B, substantially lowed to escape at the chimney. In brief, my in the manner and for the purpose herein set pan possesses in a great degree the very desirforth. able properties of cheapness and simplicity,

it effects a saving in fuel and in labor, and it F D. DRAKE improves the quality ofthe article produced. Witnesses:

What I claim as new, and desire to secure CORNELIUS SCHNURR,

by Letters Patent, isn A. B IHILLYER.

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