US2186857A

US2186857A - Domestic oven

Info

Publication number: US2186857A
Application number: US157402A
Authority: US
Inventors: Robert F Davis
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-08-04
Filing date: 1937-08-04
Publication date: 1940-01-09
Anticipated expiration: 1957-01-09

Description

Jan; 9,1 R. F. DAVIS 8 DOMESTIC OVEN Filed Aug. 4. 1937 Patented Jan. 9, 1940 UNITED STATES PATENT OFFICE.

2 Claims.

This invention relates to domestic cooking stoves and analogous devices and more particularly to a safety device for preventing the occurrence of accidental burns to persons using the .5 ovens thereof.

It has been noted by the present inventor that the average housewife receives rather frequent burns upon her forearms by reason of the fact that in reaching into a hot stove oven the forearm is inadvertently touched against the forward edge of one of the oven shelves.

According to the present invention these burns may be prevented by placing along the forward edge of each of the oven shelves a strip of noninflammable material of a kind that will not transfer heat to other objects rapidly even though the temperature of the material itself be relatively high. Asbestos is such a material, particularly in its more porous forms, for example asbestos cloth or loosely felted asbestos sheet.

Cementitious compositions having these properties may also be made, for example, by mixing asbestos or kieselguhr or the like with sufiicient Portland cement or plaster of Paris, silicate of soda or the like to harden the product. A person who touches one of these materials when it is at the highest temperature ordinarily encountered in a domestic oven will at once be aware of the fact that it is hot, but will have ample opportunity to break the contact before any P ysical injury is sustained. r

The theory of this arrangement is somewhat different from that of the ordinary heat'insulating handle, for the reason that in the present instance the outer surface of the material itself is heated and the result that is achieved does not depend upon the fact that the material will not conduct heat, but rather upon the fact that it will not transfer the heat to the skin of the person touching it with sufiicient rapidity to cause 7 a burn before the person can break the contact. Furthermore, the present invention relates to a specific application of this principle to domestic cooking ovens and similar structures.

In Fig. 1 of the drawing there is shown a perspective view of a domestic cooking oven with the door open so as to expose the front edge of the shelves in the oven;

Fig. 2 is across section through the front edge of the oven shelf showing the manner in which the non-heat transferring material is attached;

Fig. 3 is a cross section of another oven shelf showing another method of attaching the nonheat transferring material; and

Fig. 4' is a cross section of an oven shelf illustrating the use of a cementitious coating material as the non-heat transferring material.

Inthe preferred embodiment, as shown by the drawing, the oven II is provided with a hinged door I! and shelves l3 and I4. Along the front edge of each of the shelves I3 and I4 a piece of asbestos cloth i5 is attached by a flre- 5 proof adhesive IS, in such a manner that the cloth covers the edge of the shelf and effectively prevents accidental contact with the shelf itself.

' As shown in Fig. 3, wire staples I! may be used for attaching the non-heat transferring material 10 instead of adhesives. Still other means of attaching may be provided, and any other nonheat transferring material may be used in place of asbestos cloth.

In Fig. 4 is illustrated an embodiment of this invention using a. cement made by mixing three parts byweight of asbestos shredded rather finely and one part of Portland cement. Suflicient water is added to react with the Portland cement and the mixture of cement, asbestos andwater, 20 is molded into place on the shelf. As illustrated, the shelf l8 carries a molded covering IS on its forward edge.

I claim: 1. A structure of the nature of a domestic oven which includes within the oven, where it will be heated to the temperature of the inside of the oven, at least one shelf, the front edge of said shelf being covered by a fire-proof material that is characterized by the fact that when it is hot it will not lose its heat rapidly to a colder body with which it may be brought into'contact, so that when the oven is heated, and a person accidentally touches the front edge of such shelf the person will not receive a burn but will be warned 35 by the comparatively slow transfer of heat to. his person and will be able to remove himself from contact with the shelf before injury occurs.

2. A structure of the nature of a domestic oven will be heated to a temperature sufficient to cause burns when theoven is in operation, said part being in such a position that it is likely to be touched accidentally by a person using the oven, and said part having the portion which is like- 45 1y to be touched covered with asbestos in such a manner that the asbestos is also heated to substantially the same temperatureas the part when the oven is in use. the asbestos functioning so that when a person accidentally touches the 50 covered part he will not receive a burn but will be warned by the comparatively slow transfer of heat to his person and will be able to remove himself from contact with the covered part before injury occurs. u

ROBERT F. DAVIS.