US1669964A - Electrical water heater - Google Patents

Description

May 15, 1928.

B. -BARRY ELECTRICAL WATER HEATER Filed June 19, 1926 2 Sheets-Sheet 1 2 Sheets-Sheet 2 1 u g H] F I B. BARRY ELECTRICAL WATER HEATER Filed June l9, 1926 w M M May 15, 1928.

Patented May 15, 1928.

UNITED STATES PATENT OFFICE.

ELECTRICAL WATER HEATER.

Application filed June 19, 1926, Serial No. 117,107, and in New Zealand. August 31, 1925.

This invention relates to electrical water heaters in which heating element containers are inserted'into a water circulating container.

The object of the present invention is to enable the heating elements to be easily removed and inserted, to improve generally the construction of such heaters, and also to ensure that the dii'lusion of heat from the total available element surface will be utilized.

According to my present invention, a water chamber of desired section is provided with two or more element containers passing through the chamber. These containers in section are shaped according to the sectional shape of the heating elements to be inserted therein, and are open at both ends of the chamber and securely lixed in the ends of the chamber, the walls thereof being not so thicker than necessary in order to enable as much heat as possible to pass from the heating elements through such walls.

The heating elements are preferably flat in section, constructed so as to tit neatly the 25 walls of the containers and suitably insulate-d therefrom. One end of each element is connected to another at one end of the chamher, while their other ends are connected to suitable terminals at the other end of the chamber. The element containers are in pairs and a chamber may contain one or more pairs of such containers.

New elements may be inserted by withdrawing the elements from one end of the chamber and sliding the new ones in position.

Inlet and outlet pipes lead to and from the chamber to provide the required circulation.

The invention will be illustrated with the aid of the accompanying drawings, wherein Figure 1, is an elevation of the water chamber.

Figure 2, is a plan of the chamber.

Figure 3, is a longitudinal sectional elevation on line CC Figure 2.

Figure 4, is a sectional plan on line BB, Figure 3.

Figure 5, is a sectional elevation on line AA Figure 1.

Figure 6, is an elevation of the heating element.

Figure 7, is a plan of the heating element.

Figure 8, is a section of a heating element.

Referring to the drawings, a water chamher 1 is formed of a circular wall 2 and end walls 3 and 4. Passing longitudlnally through the chamber are element containers 5, flat in section, as shown in Figure 4, and open at both ends of the chamber. These containers are secured in the end walls 3 and 1 by brazing, these walls being as thin as would be consistent with strength. An inlet pipe 6 leads to and an outlet pipe 7 leads from the chamber 1 to provide the required circulation. A chamber 8 at one end of the chamber 1 is formed by a wall 9 and closed by a plate 10 secured to the wall 9 by screws 11. A sheet of mica 12 and a sheet of asbes tos 18 (see Figure 5) provide insulation at the upper end of this chamber. The wall 3 has a circular projecting wall 14: to receive the insulating plate 15 (see Figure 5), of a connecting device of ordinary type. The containers 5 receive heating elements 16 composed of strips of mica 17, upon which is wound a suitable wire 18 (see Figures 6 and 8), preferably fiat nichrome wire. Strips of mica 22 (Figures 6 and 8) are then placed on either side and the whole clamped together by metal bands 19. The wires of each element at one end are connected by metal plates 20 secured together by a screw 21 so as to make good contact. The other end of the wires 18 are connected to a plate 23 (Figure 6) from which lead flexible connecting wires 2% for attachment to the terminal screws 25 in the plate 15 (see Figure 5). As will be seen from Figure 8 the outer surfaces of the mica strips 22 of the heating elements bear closely against the inner surface of the walls of the element containers 5 so that heat from the wires will be conveyed as directly as possible through such walls. The plates 20 are insulated from the end wall 1 by mica strips and asbestos strips 26 (see Figure 5).

The elements are inserted or removed by removing the insulated end plates 10 gripping the plate 20 and simply sliding the elements out of position. Thus the removal, and replacement of the elements become a very simple matter.

The pipes 6 and 7 may lead to any desired form of reservoir or the like.

\Vhat I claim is 1. In a water heater, the combination with a water chamber provided with an inlet and outlet pipe respectively, of heat conducting containers of thin metal and flat section arranged in pairs and fixed in the end walls of said chamber and open at both ends, electric heating elements extending through said ing the ends of each pair of said heating e'I-'- merits of each pair of containers so as te retain the said heating elements in position, while enabling one pair to be Withdrawn or 10 inserted at will.

a 2. The Water heater as specified in claim 8,- ifieliiding insulating strip Oneach side bf said heating elements producing a sliding fit with the interior of said containers,

metal plates fixed to saidelelnents at one end 15 thereof and bent at their ends, means connetting said bent ends, and a plate at the other end of said elements for attachment of lead Wires to terminals.

In testimony whereof I aflix my signature.

BERT BARRY.

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