US 1920049 A
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July 25, 1933. H, ARBR 1,920,049
STOP-COCK WITH ELECTRIC HEATEh Fi 19d. May 29 1930 Fig. 5 f
mwa-Or, 229m 9499er, y /lm wwy Patented July 25, 1933 rre NT FFICE H.'lliLRilVlANN` ARBRE, OF BIENNE, SWITZERLAND STOP-COCK WITH l'liLEC'IRIC HEATER l Application led May 29, 1930, Serial No. 457,343, and in SwitzerlandiMarch 25, 1930.
The subject of the present invention is a stopscock provided with an electric heating 1 arrangement, by means of which the water `that is flowing through can be heated, For 5 setting this,y contrivance into operation a single lever suiiices, by vmeans oi' which the passage oi the waterv and the power current switch are opened and closed, so that through the position given to the lever either cold water or more or less heated water will flow out.` When the stop-cock is closedv the interior oitV the stop-cock opens towards' the outside and -hence it not ali'ected by pressure of the water that exists in the net work, to which the cock is connected. With such stop-cocks it is a matter of importance that the position of the, closin device Jfor checking the flow of water, whc is fitted up -at the place ofentry, is adjustable to the position of the activating lever. For this reason the valve body is adjustable with the stopfcock in the present invention. thermore, it is important that with such a stop-cock the quantity of water passing through `can be regulated, so that it admits of' being connected with the' network in which the water-pressure ,is `not always the same, and that -it can be adjustable for a l definite maximal heating ot' the water. ln order to attain this requirement the stopy cock is provided withv aregulatable throttle valve arrangement between the space which encloses the heating arrangement. This lat- 5 ter consists of'several ring-elements lying co-axially 011` to the other, which are in contact withf the water 4on both sides, so that there is an advantageous utilization ot they heat, andV that accordingly the heating convtrivanceA can be relatively small 'for the at-` tainmentl of any delinite maximal temperature. `This, advantage admits of being still further increased if we press the heatingl resistance of 'leach element ot thev heatin@` t Vbody,which consists of a thin metal tape embedded 1n a layer of insulation, between two thin-walled pieces of pipe, which are laid one over the other and which lie against one' another with conic surfaces that are parallel to one another. In the event that the heating body consists of three or more Fur- 4 ring-elements and thatthe heating resistance is divided into three divisions of equal resistance, then there exists the possibility otconnecting the elements in star-connection or in delta-connection, so that the stopcocl can be switched to a three-phase current network in such a manner that this is burdened uniformly on all three phases and thus a rather large number of stop-coclrs can be simultaneously switched on.l
The accompanying drawing shows us one embodiment of this present invention, viz'.,
Figure 1 vshows us the stop-cock in longi-l tudinal section;
ligure v 2 a part of the same on a llarger 6 sca e; f j Figure 3 an axial *section through the heating body; Y l v Figure 4; a transverse section half-part oi the heating body ,f j f H Figure r5 a .part of the vheating wire laid at. f
The stop-cock lhousing 26 constitutes `a chamber 27, in which the heating body is l located, and a hollow space 6, which opens into the intake 7 and is connected with the chamber 27 by means of the connecting channel .14, The floor of the chamber 27 constitutes the open discharge-branch 28, and towards its upper part the chamber 27 is '8 firmly cut oil through' thescrewed-'on cover .19. The heating body, which consists of four ringselements l, is provided with a rim at its upper end, andis laid upon a projecting piece 25 and made fastin a suitable. manner-. Inan eye 20 of the cover 19 there is the spindle 22, about which the toothedV segment 13 can revolve. By `means of the handle 14C vthe segment 13 can be turned. This catches into a. transmission wheel 17, '90 with which the piston. 12 notches. The valve spindle 18, upon which the piston 12 is wedged, carries a control screw 9, which is screwed into a female screwof the housing 26, so that thespindle can move back and forth, when itis turned in one or the other direction by means of the handle 14 and the toothed gearing 13, 17, 12. The spindle car-r, ries the valve body 15, the cone 8 and a head 10. The lower part 18 of the valve spindle, 160
- parts together.
which is provided with a thread, is not irmly united with the upper part, but through a pin 11, which projects loosely into a bore of the cone 6, while a spring 16,which rests upon the bottom of the cap 21 and pushes against the valve body 15, holds the two The valvebody 15 is keptirmly in its aXial position through two nuts, so that it can be adjusted in its axial direction. This makes it possible to adjust it in such a way that in the one end position of the handle/14 it presses firmly upon the valve seat. This regulating can also, ejg., become necessary, if the packing ring of the valve is somewhat worn. ln the open position of thevalve therev lies the head 10 upon the bottom of thecap 21. According to the position of the head 10 upon the threaded part 18 of the spindle it will sooner or later p ush against the. cap 21 and thus limits the downward movement of the valve spindle with the cone 8, which plays in a bore suited for it, so `that through the adjustment ot the head 10 the maximal throttling of the iiow of water through .the stop-cock, that is occasioned by the cone 8, is determined. lt the stock-cock is connected with a water sup- .ply installation with high pressure or if we desire to heat intensely the water flowing through, then we adjust the head 10 correspondingly high upon the threaded part 18', and reversely we screw it towards be low, if we desire that, with a deiinite pressure in the water that is flowing in and with the stop-cock opened to the fullest eX-V tent, more water should flow through it and thisy accordingly be less highly heated.
Up into the ring space between eachtwo elements l of the heating body there eX- :tends nearly as far as the upper end in each case a 'cylindrical dividing wall 2li, which projects from the bottom of the space 27. The'water, which flows in at 7, gets into the space 27 through the closing valve,`
that is governed by the bodyl, through the throttle valve arrangement, that 1s governed by the cone 8, andthe connecting passage 5 and is here forced to flow along each heating element el downwards on the outer `side and upwards on the inner side until it flows out through the open discharge piece 28. The heat, which comes forth from the heating body, is thereby imparted tothe water with little loss. In orderthat there may' also bea good transmission of heatvwhich are laid the one over the other and between which the heat. resistance, that consists of a thin metal tape 3 and lies in a layer of' insulation, is held lirmly clutched. The tape 3 is not woundv in a spiral manner as usually, but it islaid in zigzag fashion iny wound wire. would. The expansion of thek heated tape is distributed upon all the branches vof the zigzag line, for which reason it does not cause any weakened condition. It is of greater advantage to embed the metal tape, e. g., between mica sheets in such a manner that we llay 1t on one of these in zigzag lines and fasten it (Figure 5),
. layfa second sheet of mica upon it, .and lay the whole about the inner sleeve and then place the outer sleeve over it. In order that a strong pressure may be obtained, the surtacos of the sleeves 1 and 2, which.lie against one another, are for practical reasons parallel and conical as regards one another and their diameters areA thus different fromone another', so' that the tape, which is embedded between sheets of mica, ycan scarcely nd any placeV between the sleeves. the two sleeves 1 and 2 one into the other by means of strong pressure or a blow, while the metal tape that is lying between sheets of mica encloses the inner sleeve, then all parts are firmly pressed against one another, sothat the heat oi' the heated tape is properly conducted to the outer surfaces of the sleeves.
For connecting the stop-cock to a current.
segment 13 through a slit orpin coupling in a way that it is not switched on until the This has the great advantage- I we then push' 'water inlet valve is opened and that this is` not closed until it has againinterrupted the current. j
It it is intended to connect the stop-cock with "the rotating current network, the heating tapes of the four heating body elements l are divisi`oned off into three partsy of equal resistance and these are vconnected with one another 1n star or delta connection,
in order to attain a lrelatively low capacity.
A great number of such stop-cockscan be switched on in such a rotating current network without being obliged to fear that disturbances will be caused in` the network, through having switched theml on.`
Having rthus described my invention,v what l claim as new and what I desire to secure by Letters Patent is Vl-us `1 .,Agn electrichwater heater comprising a casing havingV a heating chamber. therein, said chamber having a water inlet andan outlet communicating therewith, a valve seat arrangement within said water inlet, a valve for said valve seat, means torcontrolling the flow of water through said inlet after said valve has been moved from said seat, and means for jointly controlling said valve and said water controlling means.
2. An electric water heater comprising a casing having a heating chamber therein,
a water inlet passageway leading to said chamber, a valve seat arranged within said passageway, a valve normally engaging said valve seat, means for'adjustably supporting said valve, a plug valve adapted to engage said valve seat, and means for jointly connecting said valves whereby when said adjustably supported valve is moved to open position said plug valve will control the flow of water through said passageway.
3. An electric water heater comprising a casing having a chamber therein, an outlet pipe leading from said chamber, an inlet passageway `leading to said chamber, a valve seat arranged within said inlet `passageway, a spindle rotatably mounted within said casing, a plug valve carried by said spindle, an adjustably supported valve adapted to engage said valve seat` for normally closingvsaid water inlet passageway, and manually controlled means for rotating said spindle, whereby said` plug valve and said adjustably supported valve may be alternately opened and closed.
4. An electric water heater comprising a casing having a .heating chamber therein, an outlet pipe connected to said casing and communicating with said chamber, a wat-er inlet `passageway formed within said casing and communicating with said heating chamber, a valve seat arrangedwithin said water inlet passageway, a vertically movable valve for normally engaging said valve seat for closing said inlet passageway, a plug valve adapted at times to co-operate with said valve seat whereby the flow of water through said' passageway may be controlled after said vertically movable valve has been opened, a spindle connecting said valve, and
manually operative means mounted upon 4said casing and connected to said spindle whereby said valves may be controlled.
. 5. An electric water heater comprising a casing having a heating chamber therein, an outlet pipe communicating with said heating chamber, an inlet passageway formed with said casingand communicating with said heating chamber, a valve seat arranged within said water inlet passageway, an adjustable valve normally closing said water inlet passageway, a plug valve adapted at times to c O-operate with said valve seat for controlling the flow of water through said inlet passageway after said adjustable valve has beeny opened, `a vertically positioned spindle rotatably mounted withinvsaid casing and operatively connected tov said valve, a horizontally arranged lcontrol handle mounted upon said casing and operatively connected to saidy spindle, whereby said valves may be controlled.
6. An electric water heater comprising. a cylindrical casing having a heating chamber arranged therein, abottom ywall ldetachably connected to' said casing forv closing one end of said chamber and having an outlet opening therein, al cover plate detachably connected to said casing Jfor closing the opposite end of said heating chamber, a plurality of'concentric heating elements arranged withinl said chamber, said casing having a water inlet passageway formed therein and communicating with said chamber, a valve seat arranged within said water inlet passage way, valves engaging said valve sea-t for coneV trolling and flow ot water through said inlet ranged within said dome cover, and means'A for operatively connecting said snap switch to saidcontrol handle.
p HERMANN ARBER.