US271786A - Chaeles a - Google Patents

Description

(No Model.)

0. A. BUTLER.

APPARATUS FOR BOILING SAP. A No. 271,786.- Patented Feb. 6, 1883:

UNITED STATES PATENT OFFICE.

' CHARLES A. BUTLER, or MORIAH, NEW YORK.

APPARATUS FOR BOILING SAP.

SPECIFICATION forming part of Letters Patent No. 271,786, dated February 6, 1883.

- Application filed July 2 0, 1882. tNo'modcl.)

.To all whom it may cancer-n.-

Be it known that 1, CHARLES A. BUTLER, of Moriah, in the county of Essex and State of New York, have invented a new and useful Improvement in Apparatus for Boiling Sap; and I do hereby declare that the following is'a full, clear, and exact description of the same.

My invention relates to an improvement in apparatus for boiling and evaporating cane juice and sap in the manufacture of sugar;

and its object is to economize the heat used and to save a great portion which is ordinarily wasted, whereby a larger quantity may be boiled or evaporated by the same heat and the thoroughness, cleanliness, and efficiency of the process increased, and the process itself expedited.

The invention consists ininterposing between the reservoir of liquid sap and the evapcrating-pans an auxiliary heater,in which the liquid is kept rapidly boiling, and when in that condition evaporating faster on account of gaining more heating-surface by the use of this heater with tubes or flues therein placed, (as hereinafter more fully set forth,) and within a smaller space than by the use of any other pan or boiler heretofore used in the manufacture of sugar; and, further, in the peculiar construction of said heater, and particularly in the peculiar construction, shape, and

arrangement of its tubes or fines, all as fully two of which are shown, one being situated directly over the grate and .the other to the rear thereof, a sufficient space being left hei e 3 to a reservoir F.

low the pans to form that air chamber or flue through which the products of combustion pass below the evaporating-pans to l), the chimney or smoke-exit. In the apparatus ordinarily used the bean-after passing below the pans, is carried to the-stack and wasted.

This heater consists of a rectangular chamber, constructed of metal and connected by a The bottom of this flow-chute, which would permit the liquid to escape into the pan'should it boil sufficiently to make it necessary. it will be understood that the lines open and connect with the hotair space below the pans in front and communicate in the rear with the stack or chimney, thus continuing the flueto the chimney, the heat from the fire-box thereby heating the flues (in its passage to the chimney) and the mass of liquid which surrounds the tines in the heater. By the use of tubes of flattened cross-section having their major axis placed vertically the liquid is exposed to a much greater area of radiating-surface, and the heating is much more thoroughly accomplished than it round tubes or simple partitions were used. The end of pipe 3 connecting with the heater is provided with a valve working automatically' in said heater, similar to a ballvalvethat is,it is furnished with a floatand as the liquid rises and reaches a given point the float rises, and by its rising closes the valve-and obstructs the flow until the liquid evaporates or flows into pans, when the float descends, opening the valve and causing an additional supply of sap to enter from the reservoir'.

Near the center of the heater, attached to These flues are i the outlet, is a valve of similar construction to' that described above, which floats in the pan to prevent an overflow of said pan, and by its construction keeping the contents at a uniform height by opening the valve when it evaporates sufficiently and closing it when full. The pans are connected by a siphon furnished with an air-chamber on its apex, which, as the contents boil away, conducts from one to the other. l

' I am aware that various devices have been employed for heating the liquid contained in an evaporating-pan; and I am also aware that an auxiliary heater for heating the sap before it is admitted to such pans has been employed;

IOO

specific construction of such heaters, I desire In testimony whereof I have signed'mynanie E0 to disclaim the broad invention thereof. to this specification in the presence of two sub- Having thus described my invention, What I scribing witnesses. claim ist. I

In combination with the furnace, the pans, I )HARLES A. BUTLER.

and the reservoir, the intermediate heatingchamber, G, having the flattened tubes in the Witnesses:

bottom thereof, substantially as described, and J. R. GILMAN,

for the purpose set forth. Y FRED H. STIMPSON.

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