US934555A - Automatic combined gas and water cock for mechanisms for heating liquids. - Google Patents

Description

. J. J. LISGH &. W. L. ROOT. AUTOMATIC COMBINED GAS AND WATER 000K FOB, MECHANISMS FOB HEATING LIQUIDS.

APPLIOATIOF FILED APR. 16. 1906. I Patented Sept 21. 1909.

2 BEBBTHEBBT UNITED STATES EXTENT OFFICE.

AUTOMATIC COMBINED GAS AND WATER COCK FOB MECHANISMS FOB HEATING LIQUIDS.

Specification-of Letters Patent.

Patented Sen 21- 1 909.

Application filed April 16, 1906. Serial K0. 812,006.

To all whom it may concern: 7

lie it known that we, JACOB J. LISCH and \Vnauan L. Roo'r, citizens of the United States, and residents of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Automatic Combined Gas and Water Cocks for Mechanism for Heating Liquids, of which the following is a specification.

The several features of our invention and the various advantages resulting from their use conjointly or otherwise will be apparent from the following description and claims.

The main purpose of our invention is to obtain by an economical construction and in an economical manner, with a dependable certainty, the supply of water to a water heater, and the heatingof this'water by gas for fuel. v

In the accom anying drawings, makin a part of this app ication and in which simfiar letters of reference indicate corresponding I parts,- -Figure l is a top view of mechanism embodying our invention, in combination 'with one description of mechanism where with our improved mechanism can be used. In this view, the cover or hood we usually provide to protect the coils from dirt, and for other obvious purposes, is omitted. Fig. 2 is an elevation of that end of the construction shown in Fig. 1, which faces toward the right in Fig. 1. But this Fig. 2 shows the frame uprights at the sides of the coils, and

a cover for the coils. Fig. 3 represents'a vertical, central longitudinal section of our improved automatic combined gas and water cock. The drawing of this figure is to a scale larger than that to which Figs. 1 and 2 are drawn. Fig. 4 is a sectional view taken in the plane of the dotted line 4, 4, of Fig. 3,

that side of the section being taken which faces toward the right in said Fig. 3. In this view (Fig. 1i the lower part of the piston head. together with the embracing cylinder and its inlet for water,- is removed. the primary purpose of the view being to show the formation of the adjacent end of the check valve, and the relation of this valve to the water way at the place in said way wherein it is located. Fig. 5 is a view of the piston valve. in elevation, and of its valve seat and surrounding guard. in section. This view is on a larger-"scale than that of Figs. 3 and 4. Fig. 6 is a view in vertical, central longitudinal section of the parts illustrated in F ig. 3, only the upper half of the parts being shown. The purpose of this figure is to illustrate one of the purtions of the working parts, while the water is being drawn from the heater.

We will now proceed to describe our invention in detail; I

The water-heater itself may be of" any suitable construction. Inasmuch as it is desirable that the water in the beater should be heated rapidly, the preferred construction is of a kind that will enable much water to be expeditiously heated. This is usually accomplished by a construction that provides a widely distributed or extensive heating surface, and a large amount of fire.

One of the preferred constructions for compactly obtaining a widely extended heating surface consists of a coil or coils of pi pes compactly arrauged to receive the heat, and a line or lines of flame, ora series of burners.

\Yhile our invention is applicable to various kindsof waterheaters and of burners.-

we ln "e shown herein and will describe one of the preferred kinds of water-heaters and higher plane and there is again bent and extends back and forth. its like construction is continued higher up in as man planes s desired, seven of such layers of pipes. in as many planes, being shown, in the drawing. F i 2. These coils of piping are suitably upheld. them is as shown by the two terminals of the pipe A. For example, the inlet end por-. tion A" of the pipe A serves to uphold the coils of the heater, and the exit end portion A of the pipe A performs a like function.

'e. provide a frame B, and to this frame we connect the inlet end portion A of tin coil and the 'exit end portion 3 thereof. The exit end portion A is exteiuledilu-ough a suitable connection to whatever place it idesired to deliver the water. In the present A convenient mode of upholding faucet or cock C.

- at suitable intervals.

in a straight portion A, back beneath the coils to theopposite end of the heater (such extension being shown by dotted lines in Fig. 1) and is at its end provided with the t is from this faucet, or cock C that the, hot water heated in the coils of the heater is delivered. v t

The frame ll suitably supported from below. Legs 13*, one of which is indicated in F g. at proper intervals, constitute a preferred means of support. Uprights B extending from the frame B upwardly, not only support the cover Z, but also serve to assistin keeping the coils A in place. These coils A are for this reason connected to these uprights. The cover or hood Z is provided with one or more apertures Z for the escape of the hot air rising from the burners.

.The burners D consist of aseries of parallel pipes with opening I) in the top thereof These burners D, D are distributed at proper intervals under the entire bottom' surface of the body-of the coils of pipe A.

The construction of this heater, as to coils and burners, is not new, and we make no claim for the same.

' Our newly invented mechanism is as follows:- l

E is a cylinder, properly closed by a rear cylinder head E and a front cylinder head E One of these cylinder heads should be removable. Both are preferably removable, and are removably connected to the cylinderfpreferably as follows: At each end the cylinder has an outer annular fian e Ei Each cylinder head is bolted to its adiacent end flange 15* of the cylinder by the securing screws or bolts 5", which latter pass into the adjacent flange E and by means of a female screw thread in the flange E", or by a nut. at; the opposite sideof the flange, make their necessary engagement to hold the head to the flange. In Figs. 3 and 6, female screw threads E are present in the said flange for engaging the screws E". A suitable packing i is present between the cylinderhead and the adjacent flange E. Within this cylinder E is a piston Ij,'capable of sliding back and forth within the cylinder. The periphery of this cylinder fits closely the inner surface of the cylinder and preferably a packing F 2 of am suitable kind is present at the periphery of the cylinder.

A tube G is connected at one end to the piston. The interior sp'ace or passageway G of this tube G extends through the piston, and is preferably concentric therewith, so that the axial center of the piston is coincident with the axial center of the passage G This tube G extends forward through the frontcylinder head and to distance beyond the latter. The tube is from one point bf view a hollow piston rod. That. part of this piston rod which is next to the piston is necessarily hollow. but. that part G of the .rod which is nearest the gas cylinder is not.

.E. An oil passage E" in this hearing permits a lubricating oil to be applied to the piston G so thatthe latter shall never-work hard nor stop by reason of friction, but on the cont 'ary shall always move easily in its bearing, in the cylinder head E, E. The inlet It for itroducing the water into the cylinder E is located near the midlength of the cylinder \Vithln the passageway G of the piston G is a valve K and its valve seat M. The valve K and its seat M" are so relatively constructed that the valve cannot move unduly away from it. To this end, the 'alve seat has at one end a beveled enlargement M and when the valve is moved forward, constitutes the valve seat proper. 'hen the enlargement K of the valve K is against. the beveled portion M (that is the valve seatproper). the valve is closed and vice versa. From this beveled valve K- extends a valve stem K. At the opposite end of the valve stem K is an extension K* preferably beveled and adap ed to lit a bevelcd annular part M stationary in the passage G. The valve K, stem K and extension K thus formed in combination with the tationary valve seal: M and stationary art M cannot leave the passage G But because of the length ofthe stem, this valve.-

stcni and extension are (or viewed as one is) free to move back and forth quite sutlicicntly to permitthe valve to leave its seatfar enough to allow much water to pass through between the valve and its seat. 'hen the valve is not only nnseated, but the extension K is against the beveled part M the passageway G 18 not entirely obstructed, but on account of the openings K In the extension K, the water can pass through said openings K. and at each side ofthe valve stem K. and thence between the valve and its seat, or vice. versa.

For ctmveniencc of manufacture, the bevcled valve seat M and the beveled part M- are united, forming an annular ring M.

In the left hand part. of the cylinder E is an exit passage E for the water, as hereinafter described. I

For the purpose of insuring entire safety to the coils, in case the water is turned off while the heater is in operation, we provide into the leather, and makes a tight joint.

the spring N. This spring will operate and move the valve from leftto right '(see'Fig; 3) and close the gas vvalve and thereby stop the supply of gas to the burners, and so putthem out, and thus prevent steam forming and causing an explosion in the coils.

In other words, the spring N is a safety spring in case'of trouble arising from stoppage of the watervin the supply pipe, or otherwise. i In the side of the tube or conduit G, is an exit passageway G. This way G is located in said tube G at a place to theright of the piston, Figs. 3 and 6.

The preferred description of gas valve, and the connections between this gas valve and the water valve is as follows -P indicates the inlet conduit for admitting gas to the heater coils A. P indicates the passage through the gas valve seat Q. 1 is the chamber in which the gas valve Q works. When the valve is open. the passage P is connected to the inlet P bythe chamber 1. The valve proper Q is preferably a leather one, and when brought against its valve seat Q-', prevents the gas entering the inlet P from passing through the passage P and into the chamber P. The valve seat is referably a raised annular edge, which atter when the valve is against it, presses After the gas passes through the valve passage P it passes out'of the .valve chamber P* through the exit opening or conduit P". To retain this-valve Q in place. and to enable the material of which it is composed to be readily replaced, I connect this valve tothe adjacent end of the plunger by a screw Q".

In the chamber P is an air tight plunger B. This lunger R works closely in the chamber its peripheral surface making 'an air tight connection with the interior surface ot'the chamber P; To ettectuate very perfectly this air-tight connection, an annular packing R is present in the periphery of the plunger B. This close connectionbetween the plunger R and the walls of the chamber I prevents the as which enters.

the chamber by the gas inlet P from escaping between the plunger and the adjaccntwall of chamber P S is an adjusting stem for regulating the flow of gas, the amount of the flow being accurately regulated by advancing or retracting the stem relatively to the tube piston G. This stem S has a screw thread S which latter engages the female screw thread of the nut G of the piston tube G, G This nut G is preferably at first separate-from said tube or piston rod G, G and is then connected thereto, but may be integral with this rod. By rotating this stem within the nut, the stem may be made toproject more or less from the piston rod.

- ;truction to coiipcraic with this enlarged head is a sleeve or part It which is at the rear part of the plunger R and is lixcd there. As the passage through this sleeve ll is of less diameter than the head 3* of the stem. the latter. when drawn back. cannot slip out of the plunger. After the stem is fixed in the piston rod .so that the correct amount of it (the stem) projects forward and into the plunger. to keep the stem fixedly thtre, a set not R" is screwed on this stem and against the stationary nut G. This prevents. in the well known manner. the stem from turning. and consequently from moving longitudinally relatively to the piston. hen the piston rod is tubular. the diaphragnr G preferablypresent. Before proceeding to describe the operation of this combination valve. a short description of the conduit connections of these valves is advisable.

F)" is the exit water conduit of the cylinder E. This condnit-ll connects with the coils of pipes A.- and thereby supplies these coils with water. The exit gas conduit P of gas chamber l extends to the pipes l)",.

which in turn-supply the vertical gas pipes l), which latter deliverthe gas at the burner openings D'-. An (-xit conduit V in the gas inlet conduit 1 carries continually a small amount of gas to the pilot burner Y. The

latter is used for igniting lne principal :lllai, large burner l). l). l). A. stop cock Y in v the conduit V enables the amount of gas passing to the pilot burner to be regulated. and to be entirely shut oil. when the mechanism needs repair. or when it'is out of use for a long time.

The valve mechanisms are suitably supported. In the present illustrative instance, the'cylinder E is connected by an extension E to the frame B. The conduit E passes through'this extension. l

The chambers 1" and I are for convenience of manufacture, preferably integral as shown and constitute a single piecc which for convenience is designated by the character X. This-piece X is connected to. the

" frame B, by an extension X. The conduit P passes through this extension X The mode in which our improved mechanisms operate is as follows: Water is supplied through the inlet pipe H. There ispreferlot) ahty a means of regulating the flow of water 1 through the pipe ll. because in case the water heater mechanism is to be altogether stopped or ren oved, the i'ater in the pipe 5 which feeds pipe 11 would continueto flow out at the point on the pipe where the inlet pipe II as rpmoved, thereby occasioning a ossof water, and a possibly injury to What the watzgr cfo nes in contact with. To this end a stop cock is to be understood as gov.-

. ermng the adm ssion of water to pipe ll,

but as su lrcock forms no part of our inventiou it is'omltted from the drawings. lfuder' ordinary use of our invention, the

15 above named cock will ,be always open and space Y of the cylinder l). and then passes through the opening atvalve K and runs into the space Y ofcvlinder E. and. thence into the conduit E It passes through conduit E into the coil of pipes and duly fills 2 them. During this operation, the gas is shut off from pipe P and from the burners.

As to the operation of the piston and valve K: the voter after itdias filled the space Y of the cylinder E, presses against.

0, the piston F and moves the piston to the left (Fig. 3) to the position shown in Fig. 6. At'th'e same time, the valve K is pressed to ,the left and is thus opened. The discharge cock C is now. closed, whereupon the piston F will return to the position shown by solid lines in Fig. 3, and the valve K will be moved to'the right and be closed. The gas is now admitted to pipe P. by turning a suitable cock P and pass :5 into pipe V, and the 40 cock being opened. the gas exits at the pilot burner \V. The latter is now lighted. The heater is now ready for operation. \Vhenever a person desires to have hot water from the heater, he opens the discharge cook- The water flows out therefrom. At the same time, the water from thesourcc of supply enters the pipe H and the space Y of cylinder E. In answer tothis impulse. the piston F moves quickly to the left all the way over until it occupies the positionshown by dotted lines F'"', F in space Y of the cylinder E. This long. movement of the piston does through the agency of the piston rod and .thstem S draw back the plunger 1t. .55 and the valve Q, thereby opening the passageway P fand allowing gas to pass into the chamber P. .Thence the gas immediately passes into pipe P and thence to the burners D". ,It .is'there lighted by the flame of the pilot "burner V. The flame of the I latter ignitesthc gas of the burner. nearest 1t.,and each burner lgnites the ad acent one. Thus the various burners are practically simultaneously lighted, and all the burners piping qt. the coils is thin and the'diamete'r of the l'rlplll is small, the water is rapidlyheated. and lieco neshot, and 1S ready for delivery. and as it runs out of the delivery faucet C, it is hot'and ready for use.

To return to'the piston F. After the piston F moves to the left and'occupies the p01 sition shown by the dotted lines F F", -it (i005 not remain there but moves'back to the right and occupies a midway position shown in Fig. (3. While the water continues to run, the pistonstands at this midposition. When in this position, the inlet, H is not at all covered by the piston, but is entirelyopen, .thus allowing a very large passage of water through it. .0 also the outlet E 'is not at all covered by the piston, and allows a very large flow of water through it. The

water passing into the space Y of the'cylinder then runs through the orifice G" of the hollow piston'G", thence through the openings K of the open valve, thence through the passage around the valve K, thence into the space Y of the cylinder thence outthrough conduit E and'ihenceinto the coils. There it is heated on its way to the delivery faucet C and issues therefrom at a temperature raised from seventy .to one hundred and forty degrees. \Vhen the outflow of water from the faucet is stopped by turning the same, the back pressure of water in the space Y of the cylinder-I) will cause the piston F to move toward the right, and through the agency of the piston rod t}, stem 5. and oluuger ll closes thevalve Q, Q and ti the supply of gas to the main burners, leaving only the pilot burner \V ignited. As the piston has moved as far as it can to the right, it occupies the position shown in- Fig. 3. i

.Another advantageous function of our invention is as follows: In case the cock at C has been fully and then partly closed, or in case it is partly opened, the water pressure; that is the differential pressure of it partly closes the valve -K and moves the piston F hack to the position shown in Fig. .6. but as such movement is not enough to close the gas valve Q, consequently the operator-can secure a smaller (in thiscase his.

desired) amount of water-and as the gas is not turnedotl" the water is held over the' gas flame. and the water issues at a correspondingly higher degree of temperature. In other words, if the water is turned on full. the. action of the piston F and the valve K takes place thus opening in full the gas valve or openin P for e gas to pass to the burners. T1161! by'partly-closing cock C, it does not stop the flow of the gas to the burners D but it retards the flow of water so that it flows slower through the coils. The water thus absorbs more heat as it is held longer over the flames of the burning as. V n n ()ur invention allows a pull and push movement without. springs, etc., and allows a play 0?. the plunger 111 chamber 1.

By the water pressure on the piston l and valve K. we have a reliable movement and power to auton'iaticall turn on and oil the gas to the burners simultaneously with the f flow of the water. the gas whenever turned 1 on, being lighted h v the pilot light Y, which latter always burning.

The term water wherever used in the foregoing specification and in the claims, is to be understood to stand for and to include any kind of liquid that can be used in our tion and desire to secure by Letters Patent,

1. An automatic gas and water cock for water heaters, comprising a cylinder having a water inletand outlet therein, a piston in said cylinder located between said outlet and inlet, a hollow stem connected to said piston and having an opening therein communicating with the inlet side of the cylinder, said piston having an opening therein communicating with the hollow stem, a valve for preventing the back flow of the water through said opening, a second cylinder having an inlet and outlet therein for gas, a valve controlling the outlettherein, a plunger carrying said. valve and a con waterh eaters. comprising a cylinder having a water inlet and outlet therein, a piston having a central opening and located hetween said inlet and outlet, a hollow stem having; it end fitted in said opening. and an annular ring in the end of said hollow stern forming a valveseat, a spool shaped valve having its bod) part located in said ring and having one of its heads adapted to engage the valve seat to prevent hack liuV. of the water, and having an opening in its other head, such stem having an opening therein communicating with the inlet side of the cylinder, and a valve connected to the said stem.

3. A combination gas and water cock for water heaters comprising a cylinder having an inlet and outlet therein, a piston moving in said cylinder, a stem on the piston. a see- 1 0nd cylinder having a gas inlet and outlettherein, a valve controlling the gas outlet. :1 plunger in the cylinder carrying the said valve, said plunger having a chamber there-' in. a screw.adjustahlv connected to the stem of the piston and having an enlarged head iving in said chamber and having limited movement therein. and a detent at the end of the chamber adapted to be engaged by the enlarged head of the screw whereby the plunger will he moved.

JACOB J. LISCH. \VILBER L, ROOT.

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