US922333A - Electrical water-heater. - Google Patents

Description

D. B. RAWSON. ELECTRICAL WATER HEATER. Arrmouxou FILED JULY a. 1901.

Paiinted May 18, 1909.

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Dama aliwsoN. or Los ANGELES, CALIFORNIA.

ELECTRICAL WATER-HEATER.

Specification of Letters Patent. Application med .fury s, 1907, serial No. 332,574.

Patented May 1B, 1909. `l

To all 'whom 'it may concern:

Be it known that I, DELXA B. Rawson', a citizen of the United States, residinp1 at Los Angeles, in the county of Los Angeles n'nd 5 State of (laliornia,lw.ve invented new and lectrieal Weteruseful In] irovements inl) Heaters, ol which the following is a specification. V

My invention relates to an improved l0 wire of high resistance, and it is the object of my invention. to provide a heater which `will witl'lstand sharp changes of temperoture Without any injury thereto. l

. L'furtherbect-isto provide ahe'aler so constructed that it may he easily dismounted and reassembled.

I accomplish' these oh jects hy ineans of the device'lesciibed herein and illustrated in the accompanying drawings, in Whichz Figure -1,-is"a perspective View oi my complete heater as it appears installed in connectlon with a waslfbowl. Fig. 2,-is an enlarged vertical section of the heater showingV the water passages therethrough. Fig. 5f-is a vertical section taken at right angles to the section of Fig. 2.

Referring to the dra-#rings 5 designates a9 base preferably formed of artificial stone and cast with dischargetube for the heater embedded therein. I have shown a heater ccmposedofV two units 7 and 8 whose discharge 'pipes .J'and 10 are connected to the common discharge pipe 6 at the top ol' the heater. Induction pipes 1 l and 12 of the twounits connect to a common supply pipe 13 controlled by valve 14 which is connected to a source of water supply 15 shown in this )articular instance as the cold water cock oi a Wnshhowl 16. "lhe`lower end of discharge .pipe 6 is turned ,outwardly and interiorly threaded for the rece )tion of at dowmvardly curving spout 17 Whic 1 vprojects forwardly a sufficient dis- 45 tance to dlscharge the heated water from the unit-s into the wash bowl. As bot-h of the units'are of identical construction I will describe but one in particular. v

20 designates a core of insulating material, preferably unglazed porcelain, provided with spiral grooves 21 on its cylindrical face ad apt ed to receive resistance wires 22 whose outer ends are connected 'to bindin' posts 23 located at the top of the core. zSplral grooves 56 21 are two in number, the heating Wire starty ^ing'froxn the top of the core in` one ofthe means for heating Water by means 'ofa eurrent of electricity passing through a eoil of 1 l the bottom of the core as is clearly shownin the lower part of Fig. 3. Binding `osts 23 are connectedto a source oi' electrica su `ply by wires 24 through switch 25 mountef on the upper end of base plate 5, the resistance s ir-es of the two units being' connected in parallel es is plainly shown in iin 1. Core 20 is provided with a flange 26 on its upper end cast integrally therewith and adaptedv to receive theuppt r lie red end of a glass casing, 27, the joint between the flande and the casing being made water tight by'rneas of o I rubber gasket 28. 'lhe body portion of cas"- I ing` 27 is just suiiiciently larve to fit over coro l 20 so that any liquid which the casing' A largely conlined to a passage throu h spiral from-'es 2]. The lower end ofcorc is proivided with a detachahleflan e 29`adfapted to fit against-the lower end oig glass cas iig' 27 and form o Water-tight 'oint thereviith'by means of gasket 30. Induction pipe 11 fits into a ear it yin the lower end of'core 20 being secured therein by means of cement 31, a nut 32 and gasket washer 33 `on pipe 11 bearing against flange 2.!) and holding the same in en gagement with the lowei end ofcasing 27. A hole 34 is drilled in induction pipe 11 and a corresponding hole 35"in core 20 to provide for the outward passage 'of Water from pipe `11 to the spaeebetweencore 20ed casing.,r 27. v'lhe upper end of core 20 is also provided with a hore 36 in which discharge pi e 9 yis adapted to lee cemented with cement 7, the lower end of bore 36'being connected to the space between core 20 4and casing 27h space to dischar pipe 9.

In 'the eratigii of my heater water is lst adn tte to the units in the proper quantity 1an( the current is then turned on by means l of 'switch 25. Resistance wires 21 immediately become heated 4and the Water passing through the grooves in Which-the resistance wires are Wound is also heated in its passage from the bottom to the top of the units'.

The temperature 4of the heated water may be regulated b`y adjusting the quantity of water supplied to the units by means `of valve .14, l f.

It willbe observed that I have utilized a core vwhich is cast in one solid piece an-,l whichris less liable to breakage on that aecount than a core .whiclris cast hollow or which is iilled with a substance-.of different l grooves `and crossing to the other groove'at" passes through from one end to the otherA 1s hole 3S so that the water may pass from t at i expansion ratio from the insulating material of the core. By using a core. of one ieee l have produced a heater which will wit istand sharp changes of temperature much more readily than one with any other kind of a core and I have further provided' a heater which is simple in construction and readily dismounted and reassembled.

Having described my invention what l claim as new and desire to secure by Letters Patent iszl. In an electrical water heaterin eoinbi.- nation, a cylindrical insulating casing,.a cylindrical insulating core within said casing, said core being rovided with spiral grooves on its surface t 1ere being an'annular space4 around the core at each end thereof within the casing, an end flange, cast integrally with said core and adapted to close one end of said casing, a feed ipe secured4 in one end of said core, said fee ipe being in communication with said annular space around the end of ,said core, an end flan e mounted around sai'd pipe, screw means to orce said flange against the end of said casin a discharge pipe secured in the other en of said core, said discharge pipe being connected to the annular space around the end of said core, an electrical heating element in the spiral grooves of said core, said element connecting to binding posts mounted on said integral end flange,

and a housing adapted to cover the upper4 end of said core and said binding posts.

2. In an electrical water heater, in combination, a plurality of cylindrical insulating casin s, each of said casings haviner a cylindrica insulating core therein, each of said cores being provided with spiral grooves on its surface and there being an annular space around the core at each end thereoxe within the casing, an inte ral end lange at one end of said core and a apted to close one end of said easing, said core being provided with a e from its surface beneath said ilange `out centrally through its end, a pipe gasketed in the outer end of said passage, means for insuring a water-tight joint between said llange. and the end of the casing, a pipe entered eeiitl'ally into the other end of said core and fixed therein, the pipe and core-end bcing provided with a passage establishing eon'nnunication between the pipe and the aforesaid annular space, a cover piece surrounding said pipe and adapted to close the end of the casing, a nut threaded on the pi e and adapted to-force said cover against t ie end ol tic casing, an electrical heating element in the spiral grooves of said core, thc ends of said heating element being attached to binding posts fixed to said flange, and a housing covering said flange and binding posts. v l

3.' In anelectrio water heater, in combination, a. base plate, a plurality of casings mounted on said plate, said casings being enlargcd at one ein spirally grooved cores 'litting within said casings, said cores having at one end flanges which serve as caps for said enlarged ends of said casings, theopposite ends of said cores being reduced in diameter to forni a space between the casing and core, said cores having openings located centrally of their ends, said openings leading into said spaces between the cores and casings, caps of non-conducting material for closing one end of said casings, said caps having central Opeliings therein, a connnon water suppl r pipe, pipes connecting said common supp y with the openinvs in the lower ends of said cores, a common discharge pipe embedded in said base plate, pipes connecting said connnon discharge with the openings in the upper ends of said' cores, and electrical conductors lying in the spiral grooves in said cores.

In witness that I claim the foregoing l have; hereunto subscribed my naine this 28th day of June, A1907.

DlfllilA B. ltAWSQN.

Witnesses z TRIMBLE BARKELEW, EDMUND A. S'rniusn.

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