US976944A - Electric heating-receptacle. - Google Patents

Description

W. STANLEY.

ELECTRIC HEATING REGEPTAGLE.

APPLICATION FILED MAY 13, 1909. l

Patete'd NOV. 29, 1910.

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WILLIAM STANLEY, 0F GREAT BARRINGTON, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION 0F NEW YORK.

ELECTRIC HEATING-RECEPTACLE.

To all ,307mm 'it may concern:

Be it known that I, WILLIAM STANLEY, ay citizen ofthe United/States, residing at Great Barrington, county of Berkshire, State of Massachusetts, have-invented certain new and useful Improvements in Electric Heating-Receptacles, of which the following is a specification.

This invention relates to electric heaters, such as Huid receptacles and the like, and has for its object the rovision of a device of this character in which the bottom of the receptacle is cast onto a sheet metal body so as to render the body ri id.

One of the objects o my invention is to produce an electric heater having a cast metal bottom into which the heating unit may or may not be cast.

In carrying out my invention, I take a sheet metal blank having the center cut out or perforated and cast a center of substantial thickness into this blank. This cast-in center may in some casescontain the resistance unit and in others the unit" is clamped to a cast metal base. After the bottom is cast into the blank, the blanks may be stored away and when it is desired to get them ready for use the metal is spun around the base so as to form a receptacle.

Other objects of my invention will appear in the course of the following specification, in which I have shown my invention embodied in concrete form for purposes of illustration.

In the drawings disclosing my invention, Figure 1 represents a fragmentary view of a blank with a cast-in center forming a bottom; Fig. 2 represents an end view of the same partly in section; Fig. 3 represents a view of the lower part with the metal spun up around the bottom and the unit clamped thereto; Fig. L represents a sectional view ofl the device in which the resistance conductor is cast into the bottom; and Fig. 5 represents an outside view of the receptacle the lower outer casing being in section.

Referring to .the drawings, 10 represents a circular disk or blank which may be of any desired metal, as aluminum, which is easily bent or spun into shape. This is perforated` by having its center cut out in the form of a ring and is also provided with perforations 12 around the cut out portion. In the center of this disk I cast a bottom 13 which may be of soft metal, as aluminum, or

i Specification of Letters Patent.

Application filed May 13, 1909. Serial No. 495,752.

Patented Nov.

may be of cast iron. The metal isv oured so as to form on both sides of the disk by passing through a central o ening from the perforatlons. By means o these openings the metal is held rigidly in place. This blank shown in Figs. l and 2 may be conveniently stored without occupying any considerable space. When it is desired to make use of the same, the metal is bent up and spun around the bottom. In this way a receptacle is formed having an extremely rigid body which will not buckle or change its shape upon changes of temperature. The metal may be corrugated to form screw threads 14. A self-contained heating unit 15 may be clamped thereto by means of a screw threaded base 16.

In Figs. 4 and 5 I haveshown an arrangement in which the resistance conductor is cast directly into the bottom of the receptacle. In this case, the particular form of unit may be of the type disclosed in my revious application, Serial No. 195,753,v led May 13, 1909, the resistance conductor being inclosed in a. metallic shield 17 which is -cast into the bottom 18, as shown, and an insulating ring 19 secured to the bottom by means of bolts 20 for-supporting the terminal pins 21. In this case the legs 22 are secured to the casing 23 Which is screwthreaded at 24 to engage the receptacle.

By means of my invention, an exceedingly good connection of the heating unit to the metal of the receptacle .is made possible at all times and the heaters may be stored in any convenient manner without taking up a great amount of storage room.

While I have described my invention as embodied in concrete form for the purpose of illustration, it should be understood that I do not limit my invention thereto, since various lmodifications thereof will suggest themselves to those skilled in the art without departing from the spirit of my invention, the scope of which is set forth in the annexed claims.

What I claim as new and desire to secure by rLetters Patent of the United States, is

1. The process of forming electrically heated utensils which consists in securing a heating. unit to a flat sheet of metal and bending the metal around the unit to form a receptacle.

2. The process of forming electrically heated utensils which consists in casting an electric heating unitA to asheet of metaland bending the metal around the unit to form a rece acle.

3. T e process of forming electrically 5 heated utensils which consists in securing a heating unit in the center. of a circular metallic disk and vthen bending the metal around the unit to. form a receptacle.

.4. The process of forming electrically l-15 heatedgutensils which .consists in casti `a fiat heating unfit in the center of .acircu ar disk of sheet metal and spinning the metal around the v-unit lto -orm a receptacle.

@moet Lf Y l *"6. electric heater comprisingja fiat,

circular metallic disk having a heating unit` cast inthe center. An electric heater comprisin a fiat, perforated metallic disk having a at heating unit cast in'the center thereof so that the cast nietal extends through the perforations. 8. A fluid receptacle, com rising ay sheet metal body having a :neta ic bottom cast therein and anelectric heating device for said bottom. g v .Inwitness mherecf,.-1fhave .hereunto set 30 my hand .this @th day'ofrMay,-1-909.

' STANLEY.

Witixessemv I ENSIGN :QW 01min, P. A. SMITH.

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