US1620489A

US1620489A - price

Info

Publication number: US1620489A
Authority: US
Publication date: 1927-03-08
Anticipated expiration: 1944-03-08

Description

)March 8, 1927.

' 1,620,489 D. R, PRICE OIL STOVE ND ELECTRICAL IGNITING MEANS 1 620,48 March 8, 1927. D. R. PRICE l 9 OIL STOVE AND ELECTRCAL IGNITING MEANS Filed April l5. `1924 2 Sheets-SheetB 6g ff 25 of such stoves.

to ignite oil stoves from a remote control DAW lim OIL STOVE AND ELECTRICL IGNITING o .3. PRICE,l OF WELLESLEY, MASSACHUSETTS, ASSIGNzOB. T0 FLORENCE STOWE OF GARDNER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. I

" Application mai Apru 15, i924. serial no. nievre.y

' This invention relates to an oil stove havi ing self-contained igniting means therefor remotely controlled through an electrical f circuit, whereby the ignition spark or llame lighting the wick is not exposed to the gases in the atmosphere surrounding -the stove.

An oil stove embodying the features of this invention is adapted to'widen its field of usefulness and overcome a serious defect '10 that has /rendered such stoves dangerous l5 usually contains explosive vapors due to the.

evaporation of gasoline and the Haine from a lighted match 'is oftentimes sucient to cans/e anexplosion. In factl explosions sometimes occur through the use of an oil stove as 2@ a cooking stove due to carelessness in the handling of fuel, allowin the air around the stove to become saturate with an explosive vapor, and thus there exists in the minds of many, a fear or rejudice curtailing the use FVhile it'has ,been proposed and even by an electricaligniter all such miown devices have been so complicated in their4 construction as to be impracticable or 3@ -too expensive to be generally used. ln order to be universally used an electrical igniter Jmust be able to operate from a .small source of current such as is available in a small dr cell battery. High tension currents, whic are commonly employed to produce an ignition dame, are too expensive to make it practicable for use with an oil stove. A small dry cell battery has. various limitations such as limited life with a small current strength 4@ and decreasing current strength during its life. An incandescent igniter has been proposed but one serious objection in the use of such an igniter arises from the fact that the current is insucient to maintain the resist- 451 ance element incandescent after the battery is partially exhausted. f

Objects of this invention, therefore, are to overcome the above mentioned defects in oil stoves having a remotely controlled ignition, by providing` meansfor vaporizing the fuel` the stove burner having a heating coil adapted `to vaporize the fueltherein when an electric circuit is closed, and to produce a spark or flame when said circuit is opened; and` to provide a device simple and inexpensive mits construction permitting an`ordinary dry cell battery to furnish the current to ignite an unexposed Wick, said ignition means being .controlled at a 'point remote from the stove itself..

Other objects of the invention will be manifest from the detailed description and claims appended hereto. One embodiment of` I the invention is illustrated iii` the accomspecification in which,

Fog. 1 is aview in perspective of an oil stove embodying my invention;

ypanying drawings forming a part ot the Fig. 2 is'a sectional view from the saine l angle as Fig. 1 showing the operating mechanisin of the burner;

Fig. 3 is a horizontal cross on line 3 3 Fig. 2; V Fig. 4l is a section on line d-4 Fig. 2;

sectional view Fig. 5 is a horizontal plan View of the mica fuelisolating member; Fig. 6 is a cross section of the mica fuel isolating member on line 6-6 Fig. 5;

Fig. 'l' is a View in perspective of the wick member of the stove showing the. fuel isolating Amembers in place in said' wick;

Fig.'8A 1s aside elevational yiew of the chimneys withA the outer chimney brolien away to show the wick member andcontact elements in place with a diagrammatic showing of the circuit for said contact members; Fig, 9 isa plan view of the moving Contact Velement shown/in Fig. 8 mounted on its insulating block; y

F 'g'. l() lis a section on the line lll-l0 Fig.. 9;

Fig. l1 is aside elevational view of the chimneys lwith the outer chimney broken away at its inner end..

As illustrated the numeral l designates the heavy metal drum portion of the heater or stove formed in two sections clamped together bythe stidening ring 2 and suprepresents an expanded metal grating located above and protecting the flame-proofing perforatedinetal member 5. A perforated metal member 6 similar tothe metal member 5 is also provided in the `botported by the usual legs 3, The numeral 45 tom of the heater as shown in Fig. 3, said perforated metal members and drumepor- 'f tion acting as a lire screen to prevent the flame within said heater igniting outside gases according tothe principle of the Davy lamp. An oil reservoir 9 containing the oil or other fuel 8 (Fig. 2) has a supply pipe 10 leading to the bowl 11 containing the wick 12 (Fig. 8 The wick 12 consists of annular split s eets xof asbestos 13 surrounded by two annular split pieces of sheet metal 14 fastened-together by rivets 15 4as shown in Fig. 7 and adapted to Tcontain the oil isolating member 16 (Figs. 6- and 7 The oil isolating member 16 comprises a series of thin mica sheets preferably formed by being wound upon asmandrel and having the upper portions of its length tubular with the remainder squeezed nin a press until it becomes substantially fiat so as to be capable of being inserted between the sheets 13 `of the asbestos wick 12 as shown in 7. A

A 19 and 20 at its upper end forming/seats for the outer and inner perforated

chimneys

21 and 22 respectively, the wick 12 projecting upwardly and terminating between 'said chimneys. The

chimneys

21 and 22 are fastened together by the transverse rods 23 best show'nin Fig. 3.v A rotatable shaft 24 is fastened to the rods 2,3 and actuated by n A `a handle 25 attached to Athe arm 26 rigidly fastened to the said shaft, aspring 27 being l mounted between a collar 28, integral with the shaft 25, and thewall of the lower drum section of the heater automatically to return said. chimneys to their normal position after actuation. A. knob 29 is provided on the outer end 'lof the handle 25 to permit said handle being easily grasped. By kasping the 'knob 29 and actuating the rodr 25 the chimneys .21A and 22v will be rotated relative to the wick 12 which remains stationary in the bowl 11. A .rack 30' and pinion 31 (Fig. 2) actuated by the handle 33 (Fig. 3) is providedto raise the chimney members when desired. As 'illustrated in Figs.' 9 and 10 the numeral 34 designates an insulation block of lavite or other suitable 'insulat' material havina vslot and hol'e36 throng which, hole .7a Aolt is passed to fasten the hlockto the outer burner chimney as shown iJiFig.`3.A.bindingpost37c ing the metal plates A38am?. 39 is'atta'che tol the insulation block 34, said binding post having terminal nuts l40 and 41 adapted to clamp the terminal wires of an electrical circuit thereto. A coiled resilient conducting'wire 42, preferably of nickel, has one end clamped to the binding post 37 while its other end projects through the recess 35 having a terminal 43 of platinum iridium brazed thereto.. -An electrical circuit diagramaticallyillustrated in Fig. 8 comprises a battery 44, a conducting line 45 having its terminal attached to the binding post 37 and an induction coil 46, said battery being grounded at 47 in conducting relation with the ground 48 of the conductor 17 through the wire 49 and contact 49 (Fig. 3).

The operation of the device is as follows: The knob 29 of the handle 25 is actuated causing the burner chimneys 21 and3 22 to rotate with respect to the wick 12 until the terminal 43 contacts with the terminal 18 completing the circuit through the battery 44 and conductors 45 and 49.\ The. mica isolating member 16 acts as 3an auxiliary wick Q inasmuch as the lfuel will rise upwardly through the mica laminae by capillary attraction and said fuel therein becomes vaporized due to the heating effect of the resistance coil 17. The handle 25 held inposition to make contact between the

terminals

43 and 18. for a time sufficient to vaporize the fuel and is then released. On release of the handle 25 the

contacts

43 and 18 are separated, the circuit broken, and the fuel ignited by a Aspark'passing between the

contacts

43 and 18, Said spark being intensified bythe action of the induction coil 46 which stores up electrical energy when the circuit is closed i (and releases that energy when the circuit is reopened producing an intense spark between the

points

43 and 18. The ignition of the'fuel concentrated about the isolating member 16 serves to ignitethe wick 12 and thus permits said wick to be ignited by tusing an inexpensive and readily available source of electric energy such as a storage battery remotely controlled yvitliout exposing the igniting means to the surrounding atmosphere.

tuating the member 33 which raises or lowers the burner bowl through their-ack and pin- .The Haine in the heater is'regulated (by acion 30 and 31 respectively. When the burner n y bowl is raised above the level of the fuel in the tank 8 the supply of fuel to the wick will be shut off andthe llame will die out.

. While this invention is illustrated and described in connection with an oil. heater it is vnotlimited theretobut may be used for lighting an oil lamp or any fuel burner where a remotely. controlled igmting means 'is de- 1. A heater comprising a burner bowl having' a wick'therein a tank suppl ing fuel to said wick; an auix'iliary wick'wistlin said I ing .spark terminals mounted for relative movement into and out of contact with each other, a re screen surrounding said burner, heater and igniter, and means extending through said screen for controlling said terminals from the exterior of said screen.

3. A heater comprising a drum having a metal grating extending across each end, a burner bowl within said drum, a wick within said burner bowl and a fuel tank supplying fuel to said wick, a burner chimney mounted on said bowl and rotatable in respect to said wick, fuel isolating means provided with a conductor, a portion of the latter being adapted to constitute a contact in anelectric circuit associated with said wick, and a contact carried by said chimney adapted to be engaged with said first name contactrupon rotation of the chimney in order to establish said electrical circuit, whereby the fuel in said isolating means is vaporized when the circuit is closed and ignited when the circuit is broken by separation of the contacts.

4; A heatercomprising a drum having a metal grating extending` across each end, a burner bowl within said drum, a wick within said burner bowl and a fuel tank supplying fuel to said wick, a burner chimneyA mounted on said bowl'and rotatablewith respect to said wick, fuel isolating means having a member ad]'acent thereto which is i adapted to form a contact in an electric cir 5. A heater comprising abody portion, a burner bowl therein, a tank supplying fuel to said wick, a mica fuel isolating means located in said wick, a high resistance wire forming a parte of an electrical circuit mounted Ain said mica isolating means, a burner chimney carrying a contact rotatable with respect to said fuel isolating means and rst mentioned contact means for rotating said chimney to bring said contacts into engagement whereby the fuel in said fuel isolating means is vaporized and means automatically returning said burner chimney to its original position and separating said contacts whereby the fuel in said fuel isolating means and wick is ignited.

6. A heater' comprising a Wire fount, a wick adapted .to receive oil from said fount, means for isolating a portion of said .oil in said wick containing a resistance element havin a terminal forming a part of anelectrical circuit, a contact forming a part of the electrical circuit and adapted to engage the terminal of said resistance element whereby thel electrical circuit is closed and the oil in said isolating means is vaporized,

and means separating said contact and terminal whereby said circuit is broken and said oil is ignited.

'LA wick assembly for liquid fuel burners, said assembly comprising an annular wick formed of sheets of laminated material and an auxiliary wick interposed be- Jtween bportions of the laminated sheets and comprising other laminated sheets, said auxl iliary wick having a portion projecting above the rst mentioned wick and being adapted to isolate a part of the fuel draw from said first-named wick.

8. A wick for liquid fuel burners comprising sheets of asbestos having a mica auxiliary wick therebetween and adapted to isolate a part of the fuel in said first mentioned wick. t

DAVID R. PRICE.