US1033075A - Oven. - Google Patents

Description

A. W. WHITNEY.

OVEN. APPLICATION FILED JULY 31, 1911.

Patented July 16, 1912.

3 SHEETS-SHEET 1.

, A. W. WHITNEY.

OVEN. APPLIOATION FILED JULY 31, 1911} 1,033,075. .Patgiited July 16, 1912;

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wi bnwwo: v 'umum UNITED STATES PATENT OFFICE.

ALBERT W. WHITNEY, OF BERKELEY, CALIFORNIA.

OVEN.

To all whom it may concern: y

Be it known that I, ALBERT V. WHITNEY, a citizen of the ,United States, residing at Berkeley, in the county .of Alameda and State of California, have invented a new and useful Improvement in Ovens; and I do hereby declare the following, when taken 1n connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and

represent, in

scribed and Figure 1 a front view of an, oven constructed in accordance'with my invention. Fig. 2 a horizontal sectional view. Fig. 3 a vertical section on the line a?) of Fig. *2. Fig. 4 a sectional view on the line cd of Fig. 2. Fig.5 a sectional view on the line 6- of Fig. 2. i y

This invention relates to an improvement in ovens, and particularly to ovens for domestic cooking."

The object of the invention is to provide an oven which may be heated with gasor other heat producing means, and in such a way that when the oven has been heated to the desired extent the source of heat may be removed and the oven closed so as to become in effect a firelcss cooker; and the invention consists in the construction hereinafter dep articularly recited in the claims.

In carrying out my invention I employ an outer casing 2 and an inner casing 3, the inner casing corresponding in shape but of smaller size than the outer casing so as to.

form a space 4 between them which may be filled with asbestos or other non-conductor of heat. Within the inner casing is a drum or oven proper 5. This drum is closed at its upper end and rests upon'and is secured oven is narrower than the width of the easing so as to provide narrow passages 8 at each side leading from the chamber below the plate and does not extend to the rear Specification of Letters Patent. Patented July 16, 1912. Application filed July 31, 1911. Serial No. 641,584

wall of the casing leaving room for the a flue opening passages 8. The front of the casing will be provided with a door 12 which opens into' the oven drum and which door will make a tight joint-with the casing. In the bottom of the casing and registering with the opening 35 is a port or burner opening 13 through which a burner 14 may extend. This burneryif gas is employed,will be of the Bunsen type. Preferably and as herein shown, this burner will be connected with the outer 'end of a tubular arm 15 whichis swiveled at its inner end to a supply pipe 16. The other side of the burner will be connected by a. link 17 with a bracket 18 secured to the underside of the casing. The length of the link 17 and tubular arm 15 will be such as to permit the burner to enter the port 13 and then when turned downward and forward will present the burner below and in front of'the oven where it may be conveniently lighted. The burner may be conveniently moved by a handle 19 and the source of supply will be controlled by a stop cock 20, and to prevent this valve being operated when the burner is in the oven a guard plate 21 will be secured to the underside of thecasing and so as to extend downward. Preferably and as herein shown the burner will be surrounded by a shield 22.

In order to close the burner opening 13 and the vent 10, I pivot a burner opening shutter 23 at the inner end of an arm 24 which is provided at its outer end with abell crank lever 27. Onearm of this lever I is connected by a link 28 with the'link 17, and the other arm is connected by a link 29 with a vent-shutter arm. 30 pivoted to a bracket 31 secured near the top of the easing, and on the arm 30 is a vent shutter 32. At the top of the shutter is a weight As herein shown the shutters are pivot-ally connected with their arms so that they will 'accommodatethemselves to any irregulari ties in the surfaces of the casing.

To operate theoveuthe burner is lighted and -then turned rearward and upward so as to project through the port 13, and this inward movement-of the burner turns the shutters away from'the port and the vent. The burner heats the plate 6 and the gases or heat pass out from below the plate at opposite sides upward through the passages 8 over the top of the drum, thence downward onopposite sides of the flue 9, and then upward through the flue and out of the flue opening 10. Ordinarily the combustion will be so perfect that there will be no smoke issuing from the flue opening 10 but preferably the oven will have connection with a chimney. lVhen the temperature in the oven has reached the desired point the burner is withdrawn and extinguished, and the withdrawal of the burner mrvcs the shutters to their closed position an so that the burner opening 13 and flue opening 10 are tightly closed. The oven then becomes a tireless cooker and the heat in the oven will be maintained for a long period so that food in the oven will continue to cook long after the burner is extinguished. The employment of a heavy or thick heating plate tends to distribute the heat evenly throughout the oven so that it will cook equally well in all parts. The heat 'is largely abstracted at its first contact with the metal plate; but whatever heat is not taken up in this way is taken up while the gases are passing around the oven. As the heat gene ated in the oven is not allowed to pass off into the room in which the oven is placed or into the chimney, it is all retained which not only increases the etliciency of the oven in cooking but avoids raising the temperature of the room in which the oven is placed. As the stop cock cannot be opened except when the burner is removed from the oven, it follows that the operator may always be certain that the burner is lightedbefore the burner is turned into position below the oven. ts the heat is ap: plied directly to the heating-plate the other parts of the oven will not be injured thereby but the casing is constructed from sheet metal and the parts are so joined together that they may be separated if necessary.

I claim 1. An oven comprising a casing, a -drum within the casing, the casing formed with a burner'opening below said drum and with a flue opening at the top, a burner adapted to be turned into line with the burner opening, a. shutter for the burner opening, and connection between the shutter and burner whereby when the burner is removed from the casing the shutter will be turned to close the burner opening. a

2. An even 'comprising a casing formed with a burner opening at the bottom and a fine opening at the top, a drum within the casing and smaller than the casing whereby a passage is formed between them from the burner opening to the flue opening, a burner adapted to be turned into line with the burner opening, a. shutter for the burner opcmng,

a shutter for the flue opening, and connections between said shutters and burner whereby when the burner is removed from the casing the shutters will be closed. 3. An oven comprising a casing formed with a burner opening at the bottom and a flue opening at the top, a drum within the casing, said drum smaller than the casing so as to provide passages between them from the burner opening to the fine opening, a heating plate at the bottom of the drum and above the bottom of the casing forming a combustion chamber, a burner, a link connecting the burner with the casing whereby said burner is adapted burner opening, ashutter arm pivoted at the bottom of the casing and carrying a shutter adapted. to close the said burner opening to be turned into the a flue shutter arm pivotally con nectcd with the upper part of the casing, a

flue shutter carried by said flue shutter arm and adapted to close said .flue opening a bell crank lever at the bottom of the casing connected with the burner opening shutter arm, a link connecting said bell crank lever with the burner'link and with the flue shutter arm whereby when the burner is moved away from the burner opening the shutters will. be brought into position to close the burner opening and the flue opening.

4. An oven comprising a casing formed with a burner opening at the bottom and a fine opening at the top, a drum within said casing, saiddrum smaller than the casing so as to provide passages between them, a heating plate at the bottom of the drum and above the bottom of the casing forming a combustion chamber, a burner adapted to enter the burnerf'opening, and shutters for the burner opening and flue opening.

In testimony whereof, 'Lhave signed this specification in the presence of two subscribing Witnesses.

ALBERT 'W. l/VHITNE Y.

lVitnesses I l nnonmo C. Eannn, CLARA L. VIEED.

Copies of this patent may be obtained for five cents eachfby addressing the f Gommissioner'of Patents,

Washington, D. C.

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