US1390719A

US1390719A - Thermo-electrical apparatus for boiling and heating purposes

Info

Publication number: US1390719A
Application number: US350231A
Authority: US
Inventors: Lozano Joaquin Grande
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-01-08
Filing date: 1920-01-08
Publication date: 1921-09-13
Anticipated expiration: 1938-09-13

Description

J. G. LOZANO. THERMD ELECTRICAL APPARATUS FOR BOILING AND HEATING PURPOSES. APPLICATION FILED JAN. 8. 1920 1,390,719. Pat IitedSept. 13,1921.. A

f A g 7 tainer with double walls with an interme-' UNITED STATES JOAQUIN GRANDE LOZANO, 0F MADRIl), SPAIN.

PATENT: OFFICE.

THERMO-ELECTRICAL APPARATUS FOR BOILING AND HEATING PURPOSES.

Specification of Iietters Patent. Patented Sept, 13, 1921.

Application filed January 8, i920. Serial No. 350,231.

To all whom it may concern.

Be it known that I, JOAQUIN GRANDE LOZANO, subject of the King of Spain, residing at Madrid, Spain, have invented certain new and useful Improvements in Thermo-Elect-rical Apparatus for Boiling and Heating Purposes, of which the following is a specification.

This invention relates to electrically heated utensils for industrial or domestic' use of the type comprising an inner container bearing a resistance heating element thereon, and an outer container adapted to entirely surround the inner container, the'containers being of such relative diameters that an air space is provided therebetween.

It has hitherto been suggested in electric heating appliances, to apply the coils in grooves formed in an innerceramic vessel and then coating the coils and ad acent part of the vessel with ceramic material to form a permanent coating, the whole being adapted to closely fit into an outer container.

Accordin to the present invention, the

inner container is composed of a norr-con ductive material and has grooves therein to receive an electric heating winding, the whole being inclosed in an outer container of non-conductive material of such relative diameter to the inner container as to allow of an air space therebetween.

The object of the invention is not only to form such a heating or cooking container of earthenware, but also to provide the condiate air chamber.

The invention will now be described with reference to the accompanying drawings in which: X

Figure 1 is an outside elevation of the inner member hereinafter described without the use of any shield or protection.

The apparatus is formed of two separate jars or containers a and 1; arranged within one another and of such relative diameters that an annular air space or chamber 0 is left between them. These jars are made of earthenware material permitting of differences of temperature between the normal of the liquids to be heated orboiled and that of the electrical resistance coil or coils for example from five to six hundred degrees centigrade.

The exterior of the inner container is grooved as at d to receive an electrical resistance winding (not shown) the ends thereof being secured to small projecting lugs e, by which the coil is maintained in position. The wall of the container a is of a thickness just sufficient to locate the electrical resistance winding so that a dense screen will.

not be presented to the transmission of heat. The upper end is formed with a pouring lip f, which is accommodated in a similar recessg in the outer container. This latter is of a diameter such that when the-inner member a, is placed therein, an air chamber 0 is formed, which is closed, in at the top by a filling or sealing compound y held in position by projections and grooves h on the respective members, and such compound may for instance be cement or otherwise. A flange K conceals and protects the connection between the two containers.

The outer container is fitted with a handle and two electrical terminals for attachment in an electrical circuit, and such terminals are connected inside to the resistance coil or coils.

The container may be made in suitable sizes and capable of holding, for example, one-half, or a quarter liter respectively.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what claim is:

1. An electrically heated utensil comprising inner and outer containers, said containers being spaced apart to form an air space,

the inner surface of said outer container and the outer surface of said inner container bein grooved adjacent the upper ends thereo a sealing compound retained in position in said grooves, said inner container being composed of non-conductive material, an electrical heating element wound upon said inner container and having its terminals connected to said outer container.

2. An electrically heated utensil comprising inner andouter containers, said containers being spaced apart to form an air space, the inner surface of said outer container and the outer surface of said inner container being grooved adjacent the upper ends thereof. a sealing compound retained in position in said grooves, said inner container being composed of non-conductive material, an electrical heating element Wound upon said inner container and having its terminals connected to said outer container, said inner container being formed With a peripheral flange adapted to rest upon the upper end of said outer container and to cover and protect said sealing compound. In testimony whereof Iatfix my signature.

JOAQUIN GRANDE LOZANO. Witnesses:

ELY E. PALMER,

MANUEL MARBERRY.