US2809267A - Domestic appliance - Google Patents

Description

Oct. 8, 1957 G. w. scHAuEk, JR 2,809,267

- DOMESTIC APPLIANCE Filed March 27, 1 956 50/;\\ I I J iq Q: I zs Z0 as Z6\ I5? t: l I I H 1 HI! 4 m w \52 INVENTOR. I Z G' ealge W: schauer, Jr.

H I5 ATTORNEY United States Patent eral Motors Corporation, Detroit, Mich., a corporation of Delaware Application March 27, 1956, Serial No. 574,299

4 Claims. (Cl. 219-38) This invention relates to a domestic appliance and more particularly to storage type water heaters.

It is an object of this invention to provide a simple, inexpensive control for the admission of unheated water to a storage type hot water heater so that substantially an entire tank full of hot water may be drawn therefrom without any substantial intermixture therewith of the incoming unheated water.

These and other objects are attained in the form shown in the drawing in which there is provided within the bottom of the storage tank a braided tube of spun glass fiber closed at one end and having its opposite end connected to the cold water inlet of a storage type hot water heater.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Figure 1 is a side view partly in vertical section of a storage type hot water heater embodying one form of my invention; and

Figure 2 is an enlarged fragmentary view of the spun fiber glass braided sleeve as shown in Figure 1.

Referring now more particularly to Figure 1, there is shown a storage type heater including an inner tank 20 provided with a concave bottom 22 and an outlet 24 at the top. The tank 20 is provided with a cold water inlet pipe 26 extending through the side wall of the tank 20 adjacent the bottom 22. The tank 20 is enclosed in suitable heat insulation 28 which in turn is enclosed within the outer metal walls 30 which may be provided with suitable ornamental finish. The outer metal walls 30 are provided with a transverse bottom wall 32 which supports the bottom of the tank 20. The tank 20 is provided with a lower electric heater 34 of the tubular sheath type adjacent the bottom wall 22. This electric heater may be connected to a suitable source of electrical energy under the control of a suitable thermostatic switch 36 and if desired a timer for elf-peak current consumption. The switch 36 is responsive to the temperature of the adjacent portion of the tank 20 to deenergize the heater 34. Also, if desired, a top heater may be provided.

According to my invention I connect to the cold water inlet 26 the braided spun glass fiber sleeve or tube 38 closed at one end by a plug 40 within the sleeve and a metal band 42 surrounding the sleeve 38. At the opposite end, the sleeve 38 is provided with a metal band 44 which in turn is connected to a nipple 46 connecting directly with the end of the cold water inlet pipe 26. Within the sleeve 38 is an inner ferrule 45. The sleeve 38 is held in between the ferrules 44 and 45 and is cemented there- 2,809,267 Patented Oct. 8, 1957 to by an epoxy cement 39. The braided spun fiber glass sleeve 38 is pervious and has innumerable minute openings therein which allow the incoming cold unheated water to enter the bottom of the tank 20 without setting up or inducing any substantial turbulence therein so that the hot water will remain Stratified above the cold water as the hot water is drawn through the top outlet 24 and is replaced by the cold unheated water entering through the sleeve 38. The sleeve 38 preferably is made sufliciently long to extend substantially across the tank 20 which may be substantially cylindrical. However if desired the sleeve 38 may be made longer or shorter. Soldered to and extending between the ferrule 45 and the plug 40 is a heavy copper wire 43 which keeps the sleeve 38 stretched across the bottom of the tank 20. The diameter of the sleeve 38 may be proportioned according to the diameter of the cold water inlet 26. If desired the sleeve 38 may extend around the inside of the bottom of the tank 20.

As a second form of the invention the sleeve 38 may be made of braided copper wire or of braided filament polyamide or polyester. It also may be closed in a similar manner at one end connected to the cold water inlet pipe 26 at the opposite end.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follow.

What is claimed is as follows:

1. A hot water heater including an upright cylindrical tank having a side cold water inlet adjacent the bottom and a hot water outlet adjacent the top, heating means for heating the water in the tank, and a tube within the tank connected at one end to said cold water inlet and having its opposite end closed, and extending near to the side of the tank opposite the inlet, said tube being very finely pervious throughout over the greater portion of the distance across the tank.

2. A hot water heater including a tank having a cold water inlet adjacent the bottom and a hot water outlet adjacent the top, heating means for heating the water in the tank, and a tube within the tank connected at one end to said cold water inlet and having its opposite end closed, said tube being of pervious woven material over the greater portion of its length.

3. A hot water heater including a tank having a cold water inlet adjacent the bottom and a hot water outlet adjacent the top, heating means for heating the water in the tank, and a tube within the tank connected at one end to said cold water inlet and having its opposite end closed, said tube being of pervious woven spun fiber glass over the greater portion of its length.

4. A hot water heater including a tank having a cold water inlet adjacent the bottom and a hot water outlet adjacent the top, heating means for heating the water in the tank, and a tube within the tank connected at one end to said cold water inlet and having its opposite end closed, said tube being of pervious woven material over the greater portion of its length, and a wire extending within said tube substantially from one end to the other.

References Cited in the file of this patent UNITED STATES PATENTS 1,356,881 Osgood Oct. 26, 1920 1,698,561 Ransom Ian. 8, 1929 2,576,603 Hines et al. Nov. 27, 1951

Images