US119680A

US119680A - Improvement in ovens

Info

Publication number: US119680A
Authority: US
Publication date: 1871-10-03
Anticipated expiration: 1888-10-03

Description

N0, 119,68()` PatenedOot. 3,1871,

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ABNER WILLSON, OF BUFFALO, NEW YORK.

IMPROVEMENT IN OVENS.

Specification forming part of Letters Patent No. 119,680, dated October 1871.

To all whom it may concern:

Be it known that I, ABNER WrLLsoN, of the city of Buffalo, in the county of Erie and State of New York, have invented certain Improvements in Baking-Ovens, of which the following is a specification:

My improvements relate to the construction of a portable or removable oven, designed to sit on the top plate of a stove while in use, and which consists generally of a rack and a shield-plate supported above the top plate of the stove, in connection with an inclosing tin case that serves to retain therein the heat which radiates upward from thel stove, all as hereinafter fully described.

In the accompanying drawing, Figure I is a longitudinal vertical section of my improved oven; Fig. II, a horizontal section through the case or cover, showing a plan of the rack and shield-plate underneath; and Fig. III, a transverse section thereof.

Like letters of reference designate like parts in each of the gures.

A represents a portion of the top plate of a stove; B, the cover or case of the oven, made of tin, which is supported from contact with the stove by short legs b of sheet-iron riveted to the case. It is also provided with loops b b at its top, by which it is handled. C is a shield-plate supported above the top plate of a stove by legs D D. E E are cross-wires, the ends of which are secured in upwardly-turned llanges c c of the shield-plate. Two of these wires are represented in the drawing formed together by bending a piece of wire in the form of a staple and inserting it through the flanges c, as shown in Fig. II.

These cross-wires form the rack in which the articles to be baked are supported. c is a sec! ondary`shield-plate arranged above the plate C so as to leave -an air-space, f, between them. These shield-plates O c are preferably made concavo-convex for the purpose presently to be explained. To insure the proper arrangement of the inclosing-case B over the rack E the legs D D are made to diverge or incline outward toward their lower ends so as to form a guide for the sides of the case in arranging the latter, the lower edges of which are designed to rest in contact with the base of the legs, while the ends of the shield-plate O at its corners t against the ends of the cover. The divergence of the legs D D leave a space, g, between the shield-plate and inclosing-ease B on each side for the passage upward ofthe heat into the upper portion of the case. The shield-plate at each end is formed with a recess, c2, for a similar passage of the heat at the ends of the case.

In using my improved oven the shield and rack C E are set upon the top plate ofthe stove, the articles to be baked placed upon the rack, and the cover or ease B arranged over the same. The heat which radiates upward from the stoveplate A strikes the convex shield-plate O and is by it deflected laterally and upward into the upper portion of the oven. This plate O forms a shield to protect the articles on the rack from the excessive heat to which they Would otherwise be subjected, while the auxiliary plate c, with the intervening air and non-conducting space f, affords much greater and adequate protection,and thereby equalizes the temperature above and below the rack E, and for which purpose the single plate C would be inadequate. The shield-plates C and c may be made lat and horizontal, but in such case the heat radiating upward would be deflected directly downward against the top plate of the stove instead of laterally and upwardly, as when made convex on its under surface, as represented in the drawing, which insures a much higher temperature at the top of the oven. If required at any time an additional shield-plate may be arranged above the plate c. The legs b of the case not only protect the tin at its lower edge, but also furnish an escape at the bottom for the steam which is generated within the oven during the baking process.

I claim as my inventionl. The combination and arrangement, in a baking-oven, ofthe shield-plate (l, legs D D, and rack E E, as hereinbefore set forth.

2. The arrangement, with the shield C, legs D D, and rack E E, of the secondary shield c, arranged so as to leave an air-space, f, between them, as hereinbefore set forth.

3. The combination, with the radiating-plate A, rack E E, and shield O, of the tin cover or inclosing-case B, as hereinbefore set forth.

4. The shield-plate O when made convex on its under surface, and arranged over a radiatingand rack C E so as to facilitate the proper adplate A and Withln a case, B, of a baking-oven, justment of the inclosing ease and leave space as hereinbefore set forth. for the ascent of the heat, as hereinbefore set 5. The tin case B and legs b b7 combined and. forth. arranged With heating-plate A, as hereinhefore ABNER WILLSON.

set forth. Witnesses:

6. The Construction and arrangement of the SAMUEL SMITH, i, legs D and recesses c2 with the ease B and shield J No. J. BONNER.