US1511420A - Oil stove - Google Patents

Description

Oct. 14, 1924.-

A. MEADOWS ET AL OIL STOVE 4 Sheets-Sheet l l Filed March B, -1923 joh lmlmillmI 'immuni Y u .n

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A. MEADOWS ET AL OIL STOVE Fld March 8. 1923 4 Sheets-Sheet 2l J mzw @Homey Oct. 1,4. 1924. f y A. MEADOWS E-r Al.

OIL STOVE l I Filed March 8. 1925 4 sheets-sheet 5 9 f (Tummy Oct. 14. 1924. 1,511,420

A. MEADOWS ET AL OIL STOVE Filed March 8. 1923 4 Sheets-Sheet 4 (Tua-mnu,

Patented Oct. 14, 1924.

UNITED STATES PATENT OFFICE. l'

ALBERT MEADOWS .AND ALVIN G. SHERMAN, OF DETROIT, MICHIGAN, ASSIGNOBS T0 DETROIT VAPOR STOV'E COMPANY, 0F DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

on. s'rovn.

Appiiaatign ni'ea mmh s, 192s. semi no. 623,620.

To all whom it ma concern.'

Be it known that we, ALBERT MEADOWS and ALVIN G. SHERMAN, citizens of the United States, residing at Detroit in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Oil Stoves, of which the ollowing is a specification.

This invention relates to heavy hydrocarbon oil stoves and the object of the invention is to introduce an improved priming system that is permanently connected with the stove and which is capable of selectively introducing a measured quantity of priming Huid to any one of the burners.

In heavy hydrocarbon or kerosene burners, which do not employ a wick for feeding the fuel, it is necessary to use a priming duid, the priming fluid is one of the lighter hydrocarbons, such as gasoline which is capable of vaporizing at room temperature. lt is a well known fact that liquid hydrocarbon which will` not vaporize at room temperature cannot readily be lit with a match by applying the match to the surface of a quantity of the fluid, hence it is customary to preheat the burner by introducing gasoline into it, igniting this, and allowing the same to burn. This heats up the burner so that when the kerosene is turned into it the kerosene will be vaporized and will start to burn. f y

Heretofore the customary way of handling -the priming fiuidhas been by using a meas- -uring cup or can so equipped as to introduce a measured quantity of Huid to any burner selected. It has also been customary to provide at the front of the stove suitable conduits or priming horns leading to each burner.

It is the object of the present invention to entirely eliminate this system of priming which has obvious disadvantages in requir.

the'priniing system.

Fig. 3 is a vertical sectional view of part of the burner showing the oil connections.

Fig. 4 is a vertical section taken on the line 4 4 of Fig. 5. i

Fig. 4A is a fragmentary of the distributin casing.

Fig. 5 is a section taken on the line 5-5 of Fig. 4.

detail of the top.

Fig. 6 is an enlarged vertical section` Fi il is a section taken on the line ll-ll Y of Fig. d.

Zin addition to the usual oil reservoir lo cated on the back of the stove for containing the kerosene and which is here shown and designated a, we proyide another reservoir t containing the priming Huid. This reservoir comprises an outside tank .into which is adapted to be inserted an inner tank or cylinder c provided with the usual valve d normally maintained closed by the spring e but provided with a projecting stem f adapted to contact the bottom of the outer tank b and thereby hold the valve d open when the inner tank is placed in inverted position in the outer tank. This is a well known form of oil feed used very extensively with students oil lamps.

lIn an'oil feed of this kind the level of the oil in the'outer container is maintained constantly at.a low level as at g for the reason that as soon as the oil in the outer tank rises above the level of the discharge orifice in the inner tank, a liquid seal 1s -established and the atmospheric pressure on the outside of the liquid more thanv .counterbalances the force of gravity tending to discharge .thecontents of the inner tank.

YW@ therefore employ preferably some device of this kind to maintain a constant and low level of the iuid. Connected with the bottom of the outside tank is a conduit h which `leads tothe distributing casing 'i'. This distributing casin is a cylinder pro# vided at its bottom wit -a subtended pump well j. This forms a pump cylinder into tops.

4nected with the hollow which the pump plunger k can descend. This ump plunger is provided with a hollow p unger stem m.

Arranged around the axis of this distributing casing z are a plurality of cylinder reservoirs n. Each of these reservoirs is connected by a conduit o with one of the burners l() of the stove. The burner is connected to .the heavy hydrocarbon reservoir a by the conduit 11. The reservoirs have no 'uiunication with the interior of the distributing casing except through their Securedto the hollow pump stem near the top of the distributing casing is a hollow goose neck g forming a continuation of the passage-way through the hollow stem m. The goose neck is formed with a suitable T coupling that can be conump stem for coupling up the goose nec and also for securing the solid rod 1' to the hollow rod to form the plunger rod. On the end of this plunger rod is a knob s and also an inverted cup or selector t provided with numbers on the outside as shown in Fig. 4. A coil spring u abuts against the washer 'v and against the inside of the cup to normally hold the plunger in its up ermost position. flhe washer lv is arranged etween the lower end of the coil spring 'r and the top of the tank and engages against a notched bushing lw (see Fig. 6) soldered to the top of the tank. rlhis washer is provided with suitable ribs punched out of it so as to form a temporary lock to prevent the se1ector t and the handle from being 'rotated accidentall However, by utilizing a slight' turning e ort the radial ribs of this washer will free themselves from the notches of the notched disk w, hence the selector can be turned aroundto any given position. rlihe arrangement of the numbers on the outside of the cup is so coordinated with the position of the goose neck, that for instance, when the number 3 faces the operator at the front of vthe stove, he knows that the goose lneck is positioned above the reservoir that is connected with the burner 3 of the stove.l

The o eration is simple, when the selector has numeral at the front of the stove, the o erator simply resses down'on the han e against the resistance of the spring v and the fluid in the pump well j. Obviously,

vthe Huid 'inv the ump well will be trapped bythe plunger ead and can only escape up through the hollow plunger rod and thence'discharge through the goose neck. .0f course, it discharges thr`ugh the selected. reservoir and thence runs through the connections to the burner which is to be primed. By properly calculating the capacity of the pump well, obviously an given) uantity of Huid for the burner is t us assurefd, hence n turned to expose the desiredthe pump well, located as it is, constitutes a charge measuring device to make sure that the burner will not be Hooded.

lt will be evident that the students lam type of oil feed. is not absolutely essenti for the operation of a distributing system of this ki'hd. However, 'with such an arran ement of the tanks as shown in Fig. 4, i "the inner illing tank were not used, obviously the height of the distributing reservoirs fn, would have to be at least, if not of greater height, than the storage tank, otherwise the storage tank might be lilled to the top and overflow through the distributing reservoirs. We find it advantageous to use the inner filling tank, as this when it works properly, maintains a constant low level for the exposed fuel both in the storage tank and the distributing tank, hence the distance the priming Huid has to be lifted is alwavs practically the same. This results in a more uniform char e for each burner under all conditions as eakage by the plunger head lc will always be practicallly the same.

owever, the height of. the distributing reservoirs s so calculated that under no circumstances will the priming iuid overiiow through these reservoirs in case the inner illing tank fails to function properly as for instance, when an air leak occurs in the upper part of the tank breaking the liquid seal, the capacity of the two tanks and the height of the reservoirs is so calculated that even should the inner filling tank discharge all its contents it will not spill over the tops of the distributing reservoir.

Another very important feature of this system, especially in its application to a priming system of this kind, which we desire to emphasize is that it affords a low pressure gravity feed as opposed to a force .feature by a pump or other source of pressure. This gravit feature is achieved with a very small hea and the consequence is that there is very little pressure behind the liquid flow through the distributing line so as to require tight joints. Furthermore, the fluid does not flow into the burner channel with any considerable force so as torun -over the sides of the channels which are often vquite shallow. This is quite an'essentialpoint in a distributing system ofthis kind intended for these kerosene type burners which have channelrin s in the bottom of the burner that are reztively shallow. With a high pressure feed the only alternative to properly supply the fuel to a shallow channel urner would be to provide a small orifice that serves as a pressure reducing medium somewhere in the conduit. Orifices of this kind are always van annoyance as they very easil plug up and cause a great deal of troube n the o ration. This low gravity feature secure in the manner we have described obviates all this trouble and provides the requisite slow flow into the burner channel.

What we claim is:

1. In a priming system for oil stoves, the combination of a storage tank, a distributing tank Provided with a pump well in the bottom thereof, a plurality of conduits for-` leading from the.distributing tank to separate burners, a pump plunger which can be reciprocated in the pump well to force the contents there out, and means for guiding such pump well contents to any one of the conduits selected.

2. In a priming system for oil stoves, the combination of a storage tank, a distributing tank in communication therewith, a plurality of reservoirs arranged in said distributingtank, a lurality of conduits leading to separate urners connecting with said reservoirs, a pump well in the bottom of said distributing tank, and pump plunger and rod arranged to convey the contents of the pump well to any one of the selected reservoirs when the plunger descends into the pump well.

3. In a priming system for oil stoves, the combination of a storage tank, a distributing tank, a plurality of reservoirs located in the ldistributing tank and open only at their tops, a plurality of conduits for leading from the reservoirs to separate burners, a pump well in the bottom of the distributing tank, and a plunger and stem, the lat-A ter having a hollow interior and provided at the top with a goose neck whereby when the plunger descends into the pump well the contents thereof are forced up through the hollow stem and goose neck and discharged into any! one of the selected reser-` voirs.

4. In a priming system for oil stoves, the combination of a storage tank, a distributing tank in communication therewith and provided at its bottom with a pump well, a plunger and plunger stem arranged so as the former descends into the pump well it thereby exhausts the contents thereof, plunger and stem being arranged to convey away the exhausted contents, a plurality of conduits connectible to separate burners, said pump plunger and the pump stem being arranged to select any one of the conduits upon rotative movement of the rod and lunger, and a selector on the top ofthe p unger rod for indicating the conduits selected for discharge of the priming duid from the pump well.

5. In a priming system for oil stoves, the combination of a storage tank, means therein for maintaining the level of the exposed liquid in said storage tank at a constantly low level, a distributing tank in communication with the bottom of the storage tank and in which the level of the fluid is the same as the exposed liquid in the storage tank, a plurality of distributing conduits for connecting the separate burners having communication with the interior of the distributing tank above the constant level line, and means for measuring a quantity of liquid out of the bottom of the distributing tank and lifting and selectively delivering it into any one of the distributing conduits.

6. In a priming system for oil stoves, the combination of astorage tank, an inner invertible tank which can be supported in the storage tank and which is provided with devices to maintain a given oil level in the storage tank by feeding oil from the inner tank, a separate distributing tank in communlcation with the bottom of the storage tank, a pluralit of distributing 'conduits for connecting t e separate burners having communication with the interior of the distributing tank above the constant level line afforded in such distributing tank by the operation of the inner tank contained within the storage tank, and means for measuring a quantity of liquid out of the bottom of the distributing tank and lifting and selectively deliveringA it into any one of the distributing conduits.

In testimony whereof we aiiix our signatures.

ALBERT MEADOWS. ALVIN G. SHERMAN.

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