US1472197A - Electric water heater - Google Patents

Description

Oct. 30,1923. 1,472,197

- E. E. SUTHERLAND ELECTRIC WATER HEATER Filed Oct. 5, 1921 INVENTOR g 3% 67% frnes/ESufher/and ATTORNEY Patented 30, 19 23. v I

UNITED STATES PATENT OFFICE.

ERNEST E. SUTHERLAND, OF MANSFIELD, OHIO, ASSIGNOR TO WESTINGHOUSE PROD- UCTS COMPANY, A CORPORATION OF MICHIGAN.

ELECTRIC WATER HEATER.

Application filed October 25, 1921. Serial No. 510,319.

T all whom it may concern: A resistor member 14 comprises a helically Be it known that ERNEST E. SUTHER- wound resistor wire of substantially less di LAND, a citizen of the United States, and a ameter than the internal diameter of the resident of Mansfield, in the county of Richtube and provided with relatively heavy 5 land and State of Ohio, have invented a new end portions 15 to prevent overheating of and useful Improvement in Electric Water such parts of the extensions 13 as may not Ieaters, of which the following is a specibeimmersed in a fluid 16 in the receptacle fication. 12. A plurality of perforated refractory My invention relates to electrically heated members 17 are loosely strung on the helical apparatus and particularly to electric fluid resistor 14 and on the'end portions 15.. The heaters and it has for its object to provide holes 18 in the members 17 have flaring ends a relatively simple, light and easily handled to permit the resistor 14 to adapt itmlf to immersion heater of relatively large size. relatively sharp return bends, such as are In practising my invention,.I provide a illustrated in Fig. 1. The refractory beads 66 15 preformed metallic tube in which is placed or members operate to maintain the resistor a flexible helical resistor on which are strung member 14 and the end portions 15 substana plurality of perforated refractory memtiall coaxial with the tube 10 and also to ers to maintain the resistor coaxially withinsu ate the resistor from the walls of the in the tube and to conduct heat from the tube, aswell as to conduct heat thereto. 20 resistor to the walls of the tube. I provide A combined terminal block and switch also a combined terminal block and switch casing 19 is suitabl secured to the ends of easing mounted on the ends of the tube. the tube 10 and is adapted to receive one end In the single sheet of drawings, of a supply-circuit cord 21 to permit of en- Figure 1 is a top plan view of an electric ergizing the resistor 14. 25 heater embodying m invention, a portion The device embod ing my invention proof the tube being bro en away, and vides an electrical immersion fluid heater Fig. 2 is a view, in side elevation, of the which may be adapted to the contour of the device illustrated in Fig. 1, a portion of the fluid container with which it is to be assotube being broken away and a liquid-conciated and further provides a relatively 8 3o taming receptacle being shown by broken simple means for malntaining a flexible reand dotted lines. sistor member within an uninsulated metal A metallic tube 10 comprises any desired tube, which construction permits of easily number of return-bent portions 11 located in removin a damaged resistor. The as Iieating unit may be handled by the 86 as suflicient length of tubing to substantially operator grasping the combined terminalcover the bottom surface of a fluid-containblock-and-switch casing to insert the unit in, ing receptacle 12 with which it is to be opor remove it from a fluid container. eratively associated. While I have illustrat- Various modifications may be made in the ed the tube 10 as covering an area substandevice embodying my invention without de- 90 4o tially circular in contour, this is not an parting from the spirit and scope thereof essential feature, as any desired contour may and I desire that on y such limitations shall be effected to conform to the general outline be placed thereon as are imposed b the of the base of the receptacle 12. The two prior art or are specifically set forth in the end portions 13 extend upwardly from the appended claim. plane of the return-bent portions and may I claim as my invention then extend for a short distance in a plane In an electric immersion heater, in combisubstantially parallel thereto. While the nation, a metallic tube comprising a pluextensions 13 are illustrated as at substanrality of return-bent portions located in one tially right angles to the plane of the porplane, whereby said heater may be supported (ions 11, the may extend at any other dein a fluid receptacle, and having end porsired angle thereto. tions extending away from said return-bent portions, a flexible resistor in said. tube, a. plurality of perforated refractory members loosely mounted on said resistor for maintaining it substantially coaxial in said tube 5 and for conducting heat to said tube and a combined terminal block and control switch casing secured to the ends of said tube whereby said heater may be handled to insert it in and remove it from, a fluid-containin receptacle.

n testimony whereof, I have hereunto subscribed my name this eleventh day of @ctober 192l.

ERNEST 'E. SUTHERLAND.

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