US961937A - Electric water-heater. - Google Patents

Description

W. F. CUTLER.

ELECTRIC WATER HEATER. 7 APPLICATION FILED JULY 9, 1909.

Patented June 21, 1910.

WITNESSES INVENTORI 7 ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM F. CUTLER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO CUTLER NATIONAL ELECTRIC HEATER COMPANY, OF SAN FRANCISCO, CALIFORNIA, A

CORPORATION OF CALIFORNIA.

ELECTRIC WATER-HEATER.

liquors, or for similar uses, which will be ofgreat efficiency in proportion-to its size, will be oleanlyand sanitary in construction, and

safe in operation.

In the accompanying drawings, Figure l is a vertical section of the heater on the line 11 of Fig. 1; Fig. 2 is a horizontal section on the line 22 of Fig. 1; Fig. 3 is'a perspective view of one of the cups; Fig.4.

is a horizontal section on the line 4-4 of Fig. 1; Fig. 5is a front view of the lower part of the heater; Fig. (3 is a section on the line (56 of Fig. 5; Fig. 7 is a detail vertical section through the top of the auxiliary supply pipe.

For convenience, the apparatus will be described in reference to its use for heating water, but it is to be understood that the invention is by no means limited thereto.

Referring to the drawing, 1 indicates a valve casing having a threaded ortion2, adapted to be secured to a liquid supply pipe, the passage of the water through said casing being controlled by a faucet valve 3.

The main inflowing current of the water passes from :the valve 3 by means .of an elbow 4 and a vertical pipe 5 screwed through a base 7 formed integral with the I valve casing, upon which base rests a disk 8 of soft rubber, upon which is a; disk 9 of insulating material, preferably hard lain, upon which disk 9 is a second disk 10 of, seft rubber. Upon said upper disk 10 rests the bottom 6 ofgthc cylindrical casing 11 ,of a heating chamber, which casing is partly secured in position by means of the pipe 5, which pi e is not only screwed through the'llase piate 7', and passes through the disks 8, 9,10,. but is also screwed at its upper end into said bottom 0 of the casing 11. Said casing is additionally secured by. the lower end of a central discharge water Speeificatipn of Letters Patent. Application filed July 8, 1909.

Patented J iine 21, 1910.

Serial No. 506,530.

pipe 12, which is screwed into the bottom 6 of said casing, and passes through the disks 8, 9, 10, and also centrally into the base plate 7, the lower end of said pipe discharging into a cavity 13 in the valve casing from which it flows ,by means of a faucet 14. Around the lower end of said pipe 12, but

spaced from the bottom 60f the casing by a collar 15, is a disk 16 of insulating material, preferably hard porcelain, suitably apertured, as shown at 17 \Vithin the heater casing there are con-- tained a vertical-series of inverted shallow cup-shaped insulators 19, preferably of hard porcelain, each centrally apertured and having, around said aperture, a depending hub 18, surrounding the central discharge pipe 12, said hub forming, with the wall 20 of the insulator, a circular groove to receive heating coils. \Vithin each cup-shaped insulator 19. is contained a portion of a coil 21 of high resistance wire, such as German silver, each insulator being formed with two cox'nparatively large holes 22, these holes permitting the coil of wire 21, after extending around within the greater part of the circular groove of one insulator, to pass through one of said holes, and then to extend 1n the opposite direction within the groove of the next insulator above or below. Although only one hole 22 is actually used with each insulator each cup is formed with two such holes for convenience of assembling. The hubs 18 insulate the heating coil 21 from the central water pipe 12.

Each insulator is formed with two small apertures 23 to permit the water to freely circulate through the heater, and in addition with a third small aperture 24, all of the apertures 24 of the respective insulators being arranged in vertical alinement with eaeh other, to permit a comparatively small terminal coil 25 of high resistance wire to pass upward through all of the said apertures. This latter coil may be either detachably connected at its lower end to the lower end of the larger coil 21 or may be formed integral therewith, as shown in F ig: 1. The upper ends of the small and large coils form the terminals of theco iplete heating wire."

on the uppermost Cup-shaped insulator isilaid a thin circular disk 26, which is centrally apertured, as shown at 27, to permit the central pipe 12 to pass therethrough, is

' the heater,

also tipertured, as shown at 28, to permit the water to flow freely therethrough, and is also provided with apertures 29, to permit one of the two terminals of the large and small heating coils to pass selectively therethrough. Upon the upper end of the pipe 12 is screwed a nut 31. Into the chamber of the valve 3 is also screwed the lower end of a narrow pipe which passes centrally upward through the discharge pipe 12 and discharges through its open top, thus serving as an auxiliary supply pipe. Upon said pipe near its upper end is secured a disk as which serves to retard the comniingling of the cold water passing up through said. pipe and the hotwater entering the top of the discharge pipe 12. The purpose of this auxiliary pipe is to increase the flow the heat furnished by the resistance coils being sufficient to heat a larger volume of water than would natu ally flow through the pipe 5. it also prevents the formation steam.

The two terminals of the heating coils are inserted in socket pieces 35 and are secured therein by screws 36, and said pieces 35 are screwed upon bolts 3'7 which carry at their upper ends binding screws 38, and are passed, first, through sleeves 89 of fiber or other insulating matcriahsaid sleevcs39 being set into the head l0 of the casing of the clectric heater, which head fits within said casing with a tapering tit, so as to make a very ti ht joint therein. Said bolts are then passed through rubber disks all, 42, within said heater and upon the lower ends of said bolts screwed the socket pieces 35, as heretofore described.

43 indicates an outside casing, which rests upon a shoulder .44 formed upon the porcelain disk, and is therefore spaced from the heater casing, so that no electric shock could be given by contact with said outside casing. At the side of said casing is supported a tube 45 down which pass wires 46, 47, leading to a switch 18, on a bracket connected to the ends of said wires i6, 47, being connected to said binding screws Upon the top of the outer casing is mounted an electric lanip fitting 49, the oles of which are connected by wires 50, witl said binding screws.

The stem of the key 51 of the switch 48 is arranged in line with that of the valve 3, and the latter is extended beyond the valve casing and has formed on its end fingers 52 which engage the. key 51, so that said hey always turns with the valve. By this arrangement it is provided. that the electric current cannot be turned on without at the same time also turn ng on the water supply, so that the device 0 snot become overheated.

The mode of operation of the device will be readily understood from the fore oing description. The valve is opened an the heating chamber, su

ins?

electric current turned on siini'zlta-n'eousiyl The water in up throiiigh the apertures in the cup-shaped insulators is thoroughly heated. It flows to the top through the apertures in the uppermost disk, and

cominingles with the auxiliary supply passing through the pipe It then flows down through the central pipe 12 into the cavity in the valve casing and out through the faucet. The lamp is lighted only when the current has been turned on through both heaters.

A particular advantage oi": this invention resides in the form of the cupshaped insulators, which, being inverted, prevent the collectionoi' sediment, and have formed integral therewith means for spacing the heating coils not only from the casing but also from the central discharge tube.

1. In an apparatus of the cha actor de scribed, the combination 01": a heating chamber, vertical. series of inverted cup-shaped insulators therein, coils in said insulators, electric conductors leading to said coils, and means for admitting liquid into and out of said heating chamber, substantially described.

2. in an apparatus of the character described, the combination of a heating chamber, avertical series of inverte insulators therein each insulator being apertured to permit t. liquid to freely circulate therethrough, COllS in said insulators, electric conductors leading to said coils, and means for admittins" liq into and out of said. bstantia-lly as described.

3. In an apparatus of the character described, the combi ation of a. heating chanuher, a vertical se its of inverted cup-shaped insulators therein, 'l insulators having apertures alining ve. -.celly with each other, a vertical. coil extend'ig through apertures, coils in said insulators, electric conductors leading to said coils, and means for admitting liquid into out of said heating chamber, substantially as described.

4:. In an apparatus the character described, the combination of e heating chamher, a vertical. series of iverted cup-shaped insulators therein, each formed with a cen tral aperture and 5: depending hub around said an "*rture, heating co ls in said insulators, electi c conductors leading to said coils, and for admitting liquid into and out of said heating chamber, substantially as described.

5. In an apparatus of the character dc-,

insulators therein, each therethrough,

the liquid to freely circulate coils in said insulators, electric conductors lending to said coils, a discharge pipe for conducting the liquid from said heating enes? for admitting the liquid at chamber, means the opposite end of theheating chamber to 6. In an apparatus of the character described, the combination of a heating chamher, heating coils therein, electric conductors leading to said coils, a discharge pipe for conducting the liquid from said heating chamber, means for admitting the liquid at the opposite end of the heating chamber to that from which said discharge pipe conducts, and an auxiliary supply pipe ischarging into said heating chamber at the same end as that from which the discharge pipe conducts, substantially. as described.

7. In an apparatus of the character described, the combination of a heating chamber, heating coils therein, a central discharge pipe, connected with said heating chamber at the top and discharging at the bottom, means for admitting liquid at the bottom of said heating chamber, and an auxiliary supply pipe and a discharge pipe both opening into the top of said heating chamber, substantially as described.

I 8. In an apparatus of the character described, the combination of a heating chamber, heating coils therein, a central discharge pipe, connected with said heating chamber at the top and discharging at the bottom,

means for admitting liquid at the bottom of said heating chamber, an auxiliary supply pipe and a discharge pipe botlropening intothe top of said heating chamber, and a spreader on the top of said auxiliary supply pipe, substantially as described.

9. In an apparatus of the character described, the combination of a heating chamber, a vertical series of inverted cup-shaped insulators therein, coils in said insulators, electric conductors leading to said coils, a central discharge pipe, means for admitting liquid to the interior of the chamber at the same end as the discharge end of said'discharge pipe, and an auxiliary supply pipe located within-the discharge. pi e, and a mitting liquid to the other end" 0 said chamber, substantially as described.

' 10. In an apparatus of the character described, the combination of a heating chamber, coils therein, electric conductors leading to said. coils, a central discharge pipe, means for admitting liquid to the interior of the chamber at the same end as the discharge end of said discharge pipe, and an auxiliary supply pipe located within the discharge pipe, and admitting liquid to the other end of said chamber substantially as described.

11. In an apparatus of the character described, the combination of ,a' tieating cham ber, heating coils therewithin, means for admitting liquid into and" out of said heating chamber, electric conductors connected to said coils, a rotary switch for controlling the current through said conductors, said switch having a key, and a rotary valve for controlling the passage of liquid into and out of said chamber, the axes of said switch and valve bein in alinement, and said valve having an aXia extension engaging said key, whereby said valve and switch can rotate only in unison, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM F. CUTLER.

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