US2219623A - Range - Google Patents

Description

Oct. 29, 1940. E. s. CRIDDLE RANGE 2 Sheets-Sheet 1 Filed July 29, 1939 IN V EN TOR.

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Patented Oct. 29, 1940 UNITED STATES PATENT OFFICE to Dortch Stove Works, Inc., Franklin, T

corporation of Tennessee Application July 29, 1939, Serial No. 287,394

4 Claims.

This invention relates to cooking ranges and more especially to ranges utilizing oil burners for heating purposes. An object of the invention is to utilize reflected, conducted and radiated heat to increase the temperature obtainable within the oven, the means employed including an adjustable element whereby the conduction of heat to the interior of the oven as well as to the top of the stove can be regulated.

A further object is to provide a novel arrangement of reflecting surfaces, heat absorbing and conducting members, and an adjustable conductor of heat all of which are arranged in a new and novel manner to produce the desired eflicient results.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the I invention as claimed. 2 In the accompanying drawings the preferred form of the invention has been shown.

In said drawings:

Figure 1 is a view partly in front elevation and partly in vertical transverse section through a portion of an oil range constructed in accordance with the present invention.

Figure 2 is a section on line 22, Figure 1.

Figure 3 is a section on line 3-3, Figure 1.

Figure 4 is an exaggerated and greatly enlarged section through one end portion of the adjustable heat conductor forming a. part of the present invention.

Figure 5 is a plan view of a portion of the oven and the adjustable heat conductor showing the same positioned to partly overlie a single oil burner.

Referring to the figures by characters of reference, l designates the casing of the range which can be of the usual or any preferred construction and has a top 2 provided with the usual openings 3 adapted to be closed by removable lids 4 or the like. An oven 5 is supported within the casing and is spaced from the bottom and side walls thereof, there being a sufliciently large space between this oven and one side wall of the casing l to provide a combustion chamber 3 in which is located one or more oil burners I. In the form of the invention shown in Figure 2, two of these 011 burners are employed. However,

and as shown in Figure 5, a single oil burner 8 may be used. I

That wall of the oven 5 which forms one wall of the combustion chamber 6 is formed of a metal which has a high degree of conductivity 5 of heat. It is preferably formed of a copper plate and has been indicated at 9. The top it) of the oven is formed with a. transverse slot II, and supported between and spaced from the stove top 2 and the oven top in is a heat reflector, such 1 as a chromium plate l2.

In the slot ii there is mounted a slide l3 also formed preferably of a copper plate and having an operating means, such as a rod I connected to one end and projecting from the casing or housing i so that it can be easily grasped and used for the purpose of shifting the slide longitudinally relative to the oven.. The slide is of such length that when it has been pushed in one direction the limit of its movement, one end thereof will overlie the burner 1. By pulling the slide to the other limit of its movement, however, the end which formerly had projected over the burner will be retracted to a position substantially flush with the copper wall 9. That end of the slide which is adapted to project over the burner is preferably tipped with a hard metal as shown at l5 so as to prevent the end of the slide from becoming unduly affected by the intense heat to which it is subjected.

That wall of the combustion chamber 6 which is opposed to the wall 9 is preferably chromium plated as indicated at It so as to provide a reflecting surface.

Although chromium is preferably used because of its reflecting properties and its ability to withstand heat, it is to be understood that any other metal or the like having similar properties could be used.

When fuel is burned in the chamber 6, heat 40 radiating from the burner will be reflected from th chromium plate I6 toward the oven where these heat rays with those radiating directly from the burner will be absorbed and conducted for release evenly within the oven. By shifting slide l3 so that it will project over the burner l, the end thereof will be heated to a high temperature and the heat thus accumulated will be conducted along said strip and under plate l2 which acts to reflect the heat downwardly, and keep the stove top cool. Heat is also released downwardly into the oven by slide l3. All of this tends to increase the intensity of the heat within the oven.

By adjusting the slide [3 out of position over the burner the amount of heat conducted to the oven through the top will be reduced greatly and the hot gases from the burner, instead of flow ing under plate l2 and along strip l3, as shown by arrows in Figure 1, will flow over plate l2, and said plate will act to reflect the heat upwardly toward top 2.

Where two burners are used the slide can be positioned to extend over both of them as shown in Figure 2. Where only one burner is employed, however, the slide can be located as shown in Figure 5.

While the reflecting surface indicated at I8 is designed primarily for the purpose of directing heat waves toward the wall 9, it is to be understood also that it constitutes an insulator for preventing the loss of heat through the wall of the casing l.

What is claimed is:

1. A cooking range including a casing, an oven therein having a wall highly conductive of heat, there being a combustion chamber between said wall and one of the walls of the casing, there being an opening in the top of the oven, a closure for the opening, said closure being of a material highly conductive of heat, and means for shifting the closure into or out of position within the combustion chamber without opening the top of the oven.

2. A cooking range including a casing having an oven and a combustion chamber, one wall of the oven being of a material highly conductive of heat, there being an opening in the top of the oven, a closure for said opening composed of a material highly conductive of heat, a plate interposed between and spaced from the top or the oven and the top of the stove, and means for shifting said closure into or out of position within the combustion chamber, said means being extended from the casing.

3. A cooking range including a casing, an oven therein, there being a combustion chamber between the oven and one wall of the casing, one of the walls of the oven being of a material highly conductive of heat, said wall constituting one wall of the combustion chamber, a slot extending within the top of the oven, a slide formed of a material highly conductive of heat constituting a closure for the slot, means for shifting the slide into and out of the combustion chamber without exposing the opening in the oven, and means at that end of the slide movable into the combustion chamber for resisting heat absorption.

4., A cooking range including a casing, an oven therein, there being a combustion chamber between the oven and one wall of the casing, one of the walls of the oven comprising a material having a high degree of heat conductivity, said wall constituting one wall of the combustion chamher, a burner within the combustion chamber, and means adjustable into and out of position over the burner for conducting heat into the top portion of the oven, said means including a strip of material highly conductive of heat, there being an opening in the top of the oven normally closed by said strip, and means for moving the strip into and out of position over the burner.

EDWARD SCRUGGS CRIDDLE.

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