USRX4I2 - swift gold - Google Patents

Description

1. 3. GOLD. W Domestic 0vn No. 4.v j v 'Reissued Aug. '6, 1838.

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Patent therefor as a citizen of Norwich, in the laid ciaim,.owin g w my inexperienceand want -ducing an effect, therefore I have applied and dEST AVAILABLE' COPY 1. SWIFT com), on NEW YORK, 1v. v.

IMPROVEMENT IN AN OVEN CALLED THE UNION OVEN.

Specification forming part of Letters Patent dated December To all whom it may concern.-

Be it known that I, I. SWIFT GOLD, of New York, in the county and State of New York, invented a new and useful Improvement in an Oven, and that this invention was in the year of our Lord 1833, of which the following is a specification.

The oven embracing this improvement I named the Union Oven, and tookoutLetters county of New London and State of Connecticut; and where, inder said Letters Patent I 'of information, to more than was original with me, and in claiming what was original with me specified an effect instead of a mode of prohad said Letters Patent canceled, and I will now give a more accurate description of in improvement called the Union Oven, whic time has proved to be highly valuable.

The characteristics of this oven are that it secures and applies the heat in the most eflicient and convenient manner by means of confined air and an internal arrangement causing, a certain regular circulation of hot air.

The oven A is most easily constructed of a square form with but one door, B, and without any bottom, as when used it may be placed on the top of astove or other heated iron plate; but it may be made with more than one door and in any other form. It should be made oftin, thin sheet-iron, or other thin metal plate, and that with a bright surface is to be preferred. By its being thin less heat will be absorbed by it and in that way lost, and by its being of a bright surface the heat is more 'effectually retained where it is designed to operate.

The oven may be thus constructed: Let two ovens or bodies be made withsides, back, and top, the front of each being open. Let the height and depth from front to back of these be the same-at first, but the width of one,-say, one inch less than that of the other. Of this which is less in width let the front edges and bottom edges be turned outward half an inch, the top front edge being turned upward the same. The wider oven being new placed over the other, its edges meet the edges that are turned, and must be locked or riveted together or united in any other secure and convenient manner.

A nhle oven is thus formed with 1833; Reissue No. 4, dated August 6, 1638.

a space-of half an inch between the respective plates which confine the air. This space may be more, if necessary. Let the door then be made double in a similar manner to fit the front, having a sill or brace across under the bottom to support the oven. The oven thus constructed will confine the heat.

The shelves or grates C in this oven must be supported by hooks or ledges on the sides, and so arranged as to permit the hot air to pass between and around the articles to be baked and pervade the whole oven. The oven may be used in this condition withontthe internal arrangement above mentioned regulating the circulation of heat or hot air; but this internal arrangement renders the oven more eflicient and makes it superior to any other. The circulation may be thus produced: At a dis tance from the back side of the oven of onetwelith partof its depth let a sheet of tin or other metal, D, be secured passing from side to side, the upper edge of it reaching to within the same distance of the top of the oven, and the lower edge of it within two or three inches of the bottom. From the lower edge of this plate let another, E, extend three-quar ters across toward the opposite side of the oven in the form of an inclined plane with a descent of about one inch in twelve. Another sheet, F, in a horizontal position maybe united with this inclined one above it in such manner as to inolose between the two a quantity of confined air, thns'forming a shelf for baking, and at the same time securing the articles to be baked from being scorched from the iron plate. That part of the interior thus divided from the other by the lower shelf and plate, which together make the division from near the door to near the top, is a chamber for the generation of heat.

The heat generated heats the air, and then the operation is as follows: This chamber for the generation of heat presents a column of air from the bottom to the top, and the other part, which is the oven, presents another colnmn'connected with the former at the top of the division and by the door in front of the bottom shelL By the eneration of heat the air absorbing it is rare ed and rendered 1i ghter, and in its natural ascent is carried by the inclined plate formed by .the bottom shelf to the back, and then it risesto the top. At the same time the air in the oven, being less rare that the hot air in its descent onderance descends to the hotby the door the other der the bottom shelf, supplying the place of the air which has-ascended, and becoming rarefiedin turn ascends also, and so on. y The heat is constantly more or less absorbed by what is placed in the oven to be cooked, and consequently the air in the oven will continue to preponderate, keeping up the circulation. The shelves must be so arranged can pass around or over whatever is .to be operated upon. This internal arrangement by preventing opposing currents of air circulates the heat more rapidly and prevents such accumulation of heat in any part as to burn.

It is plain to be seen th described is produced by this intern rangement.

As inventor I do not claim to have first disfied, by its prep tom, where, entering chamber, it passes un at the circulation al arcovered the double case, for that has been long known and can be 7 claimed exclusively by none. this invention is to be credited to Count Rumford. The double case can only be claimed incertain applications.

I therefore claim and wish to secure by Letters Patent as my invention-- The internal arrangement above described andany other internal arrangement in an oven or stove, though diifering somewhat from this in parts and proportions, yet producing the circulation of heat or hot air upon the same principles on which I have founded my invention. l

I. SWIFT GOLD.

Witnesses:

' ABRAHAM Pos'r,

Lamar. M, FELTUS.

As I have lately ascertained, I believe.

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