US1026030A - Water-heater. - Google Patents

Description

N. G. GOREAU.

WATER HEATER. APPLICATION FILED JUNE8,1909.

Patented May 14, 1912.

Attorney UNITED STATES PATENT OFFICE:

NELSON eheonmm, on NEW ORLEANS, LOUISIANA.

'. WATER-HEATER.

To all whom it may concern:

Be it known that I, NELSON G. GonEAU, a citizen of the United States, residing at New Orleans, in the parish ofOrlea ns and State of Louisiana, have invented a certain new and useful Improvement 'in Water- Heaters, of which the following is atspecification.

My invention relates to water heaters of the class generally known as instantaneous water heaters. 3

The object of the invention is to provide a new and eflicient heating coil.

The foregoing and other advantages of the invention are hereafter fully explained in connection with a detailed description of the drawing which is a vertical section in diagrammatic form of an exemplifying apparatus embodying the invention. I

' Reference character 1 designates a casing in which the heating coil 2 is mounted. The coil consists of an upper flat spiral 3, the center portion of which is continued to form a downwardly flaring conical spiral 4. The pipe constituting the coil is flattened and the longer axis arranged vertically as shown, so that the coils of the pipemay be arranged close together and so that a very large portion of the pipe surface is directly exposed to the heat from the burners. The coil may be arranged in'many different ways. By flattening the tube composing the coil and arranging the turns of the coil so that a space is left between the turn, a very large from surface of the coil is. exposedjto the heat the burners. Thesei coils become quickly coated with sootors carbon which readily absorbs the heat and communicates it to the coil. My heating coil consisting of a flattened tube, the convolutions of which are spaced apart in the manner shown or any reasonable variation thereof is an exceedingly efiicient heating element.

.VVater enters the coilat 5 and passes out at 6. The end 6 of the coil communicates through-a valve 7 with the motor-cylinder 8 through inlet port 9. The cylinder also has an outlet port 10 which is connected to the service pipe through which water isled to different faucets to be supplied. The out-- let port 10 may, if desired, be somewhat restricted by means of a flange 11 cast in the cylinder. Within the cylinder is piston 12, connected to valve stem'13. The "piston is provided with a .port or by-pass 14 in which valve 15 is seated in such a way that I Specification of Letters Patent.

Patented May 14, 1912. f Application filed June 8, 1909. Serial No. 500,824.

a nut 15 on the stem serves to adjust the tension of the spring. The upper end of the valve stem 13 above the piston carries a thermostat 17, consisting of a series of dished brass disks 18 arranged in pairs, each pair being encircled by a steel ring 19., The several pairs of disks are secured together as shown and any convenient number of pairs may be used to give the desired expansion. In the upper end of the cylinder is a screw 20. provided with a lock nut, servmg as an adjustable stop to limit the movement of the thermostat.

The apparatus so far described operates as follows: When any service valve is opened water is drawn through the coil and as soon as it passes in any considerable quantity through inlet port 9 into the cyl' inder the piston 12 is raised until the upper end 'ofthe thermostat engages the adjustable stop. The spring controlling the bypass'valve 15 is made of sufficient strength to cause the water to raise the piston before the valve is opened. The valve having reached its limit of travel the fluid pressure raises the by-pass valve 15' and water .flows through the piston and discharge port 10 to the service pipe. The u ward movementof the piston lights the main burners under the miles will be hereafter described and the .water is rapidly-heated. As the heated waterpasses around the thermostat its dished brass plates expand and being retained by the steel rings '19 this expansion results In a separation of the center points of the plates, that is an elongation of the thermostat. This elongation of the thermostat is proportional to the heat of the water and as the upper end of the thermostats-is in engagement with stop 20 the valve stem 13 is moved downward as the water heats 'aud is permitted to move upward as the water cools so that an automatic regulation of the temperature of the water is effected.

When the service valve is closed water ceases to flow through the motor cylinder. small amount of water may still pass through the by-pass valve'which does not seat fully and the piston 12 therefore descends under influence of gravity and a spring which will be later described. This movement of the piston shuts off the main gas burners and heating of "the water is discontinued. 7

Below the motor is the gas valve 30 which I has two ports: 31 the main port, and.32

' lower the valve stem 13 on which the valve.

the pilot port. Gas enters at 33. Port 31 is closed by the main gas valve 34. A spring compressed between the valve and the valve casing tends to close the valve and to lating valve 39 through pipe to the pilot burner 41. t

The pilot burner is continually lighted and may be regulated by valve 39 so that the flame is very small, requiring a mini- 7 mum quantity of gas. When valvestem 13 is raisedby the motor piston the main valve 34 is raised and gas is admitted to the main burners 38. The pilot burner takes its gas from the same source as the main burners and when the pressure in the supply pipe 33 is reduced by opening the main valve the pilot light would frequently be ex tinguished because of the reduction of pressure in the supply pipe and because, of the rush of airand gas from the main burners arrangement of the pilot valve 36 which 1,.

opens concurrently with the main valve. Therefore whenever the main valve 1s opened the pilot light receives an additional quantity of gas which prevents it from being extlnguished.

The motor cylinder may be conveniently supported by a bracket secured to the valve casing 30.

Other advantages of the structure will be apparent to'persons versed in the art with- 1 out description and variations which may be made in the structure without departing from the invention are also evident.

I claim:

In water heating apparatus, the combination of a lower heating coil composed of a tube of vertically elongated cross section, the convolutions of the tube being arranged approximately in conical form and just far enough apart to permit flame to pass between the two, and an approximately flat heating coil above the first, the coils being connected in series.

NELSON Gr. GOREAU.

Witnesses Eu. T. CERVILLIER, Louis DENNIS.

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