US1387583A - Fornia - Google Patents

Description

Patented Aug. 16,1921.

IN Innuwlu WITNESS UNITED STATES GEORGE NQBLANCHAED, or SAN FRANCISCO, CALIFORNIA, AssrG PATENT OFFICE. i

NOR TO COLMAR BURNER CO., INC., F SAN FRANCISCO, CALIFORNIA, A CORPORATION 0F CALI- FORNIA.

AUTOMATIC FUEL CONTROL.

Specification of Letters Patent. Patented Aug, 16, 1921.

Application filed January 31, 1920. Serial No. 355,361.

To all whom t may concern:

Be it known that I, GEoizGE N. BLAN- CHARD a Citizen of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in. Automatic Fuel Controls, of which the following is a specification.'

In hydrocarbon burners as at present manufactured the same will flood should L the burner flame Vbecome accidentally exi' is maintained at a predetermined temperature by the burner flame.

The principal objectl of the present invention is to provide a means preferably associated with the burner generator and controlled by the temperature thereof for permitting a flow of fuel into and through the generator during such time as the generator is at a sullicient'temperature to generate the 1 fuel passingtherethrough into a gas. A

Vfurther obj ect is to provide a means whereby the operation of fuel controlling means is capable of being varied in accordance with ,dilferentte'mperatures of the generator. A further object is to provide a construction wherein mechanical means are provided for positively shutting off the flow of fuel to the generator at such time as thetemperature of the generator falls below a predetermined point. l i

With the above'mentioned and otherobjectsin view, Vthe invention consists in the novel yconstruction and combination of parts hereinafter described, illustrated in the accompanying drawings, and set forth in the claims hereto appended, rit being understood that various changes in the form, proportion, lsize and minor detailsV of construction kwithin the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference is directed to the accompanying drawings, wherein- Figure 1 is a longitudinal sectional view of one form of burner with the preferred embodiment of my invention applied thereto.

Fig. 2 is a vertical detailed sectional view of the controlling valve forming a part of my invention.

Referring more particularly to the drawings, wherein like characters of reference designate corresponding parts, l indicates a suitable burner member having a base 2, and formed with an interior mixing chamber 3. The mixing chamber is provided at suitable points with suitable burner openings and the openings 5, for av flame to issue from the burner at a point beneath the generator'hereinafter described. Liquid hydrocarbon fuel, preferably under pressure, is Supplied to the burner through the pipe 6, vpreferably controlled by a manually operated valve 7 above which is mounted an automatic valve 8, provided with a .fuel inlet opening 9 and outlet opening 10,/ the outlet opening discharging into a coupling 11 carried on the outer end of a generator 12. The fuel generator 12 is preferably of the conventional tubular construction and is disposed longitudinally of the generator burner openings 5 and above that portion of the burner member 1 adjacent the burner openings, the generator being supported by suitable brackets 13, provided with openings through which the generator projects. At its discharge end the generator discharges into the mixing chamber 3, thus, it will be apparent that the liquid fuel entering into the generator under pressure is converted, by the temperature of the generator which is maintained by the llame through openings 5, into a gas, the major portion of which escapes through the burner openings not shown. To automatically control the flow of the hydrocarbon fuel through the generator 12 in accordance with the temperature of the generator I employ the folconnecting at one end with the outlet opening 10 and` formed at a point approximately centrally of the chamber 15 with a lateral inlet opening 17 disposed preferably at right angles to the channel in arm 1G, and said inlet opening 17 is preferably formed with a valve seat 18. One end of the chamber 15 is adapted to be closed by a removal plug 19 threaded into an opening in the body'lfland to the other open end of the chamber 15 'is threaded a coupling 20. to which is in turn threaded a closure cap 21, provided with an outwardly extending' nipple 22, said cap being' provided with an opening' 2?) connecting' the nipple with the inner wall surface thereof. A suitable diaphragm 211 is held between the end of the coupling 20 andthe wall of the closure cap 21 providing a. chamber 25 at the outer face of said diaphragm communicating with the interior of the nipple 22 through the opening 23 and closing the interior of the chamber 15, so that the leakage of the liquid .fuel admit-ted thereinto is prevented. Mounted within the chamber 15 is a headed piston 26, the stem 2T of which is slotted for receiving the end of the arm 1G, and said stem at the rear end of the slot is provided with a threaded opening` 28, within which is threaded a needle-valve 29, the opening 30 of which is adapted for coperation with the valve seat 18 associated with the lateral arm 1G. The outer end of the valve 29 is preferably slotted as at to admit of adjusting the same within the threaded opening' 28, at such time a. the plug 19 is removed fo 'm the body The headed end of the piston 26 is normally maintained in Contact with the rear face of the diaphragm 24 by the coiled compression spring 32 to maintain the pointed end 3() or the needle valve 29 in contact with its seat 18. Threaded into the nipple 22 is a suitable tube 33 of relatively7 small diameter and the same is adapted to extend parallel with and in close proximity to the generator 12 and preferably above the generator burneropenings 5. The outer end of the tube 33 is closed and is preferably coiled as at 3e about the discharge end of the generator' 12, so thatthe outer end of the tube will be maintained at approximately the same temperature as the discharge end of saidgenerator 12. The tube 33, chamber .25., opening 23 and interior of the nipple 22 are preferably filled with mercury,v thus providing' a thermostatic member associated with the automatic valve 8 whereby on the heating of the generator 12 to a predetermined temperature the expansion of the mercury within the tube 38 will operate the diaphragm 24- which will in turn7 through the piston 2G release the valve 29 from its seat and permit passage of fuel underpressure from the pipe 6 through the automatic valve 8 and into the generator 12. Should for any reason the temperature of the generator 12 fall below a predetermined degree, the contaetion of the mercury within the tube will release the pressure in the tube and chamber 25 and permit the spring' 82 to the valve 29, cutting off the flow of fuel to the generator' until the same is again heated to a sufficient temperature to gasify the liquid fuel admitted thereinto. It will be apparent that the adjustment of the needle valve 29 within the threaded opening 28 controls the sensitiveness of operation of the automatic valve.

While have illustrated the present invention with a particular form of fuel burner and generator, it is to be understood that such disclosure withthe respective burner" and gene ator is merely illustrative and that l am not to be confined to any particular type of burner or gene ator, and in my present illustration l have only described such portions of the burner and generator as are absolutely essential in carrying' out the invention.

Having thus described my invention what 1 claim is:

1. ln combination with a generating tube having' a liquid fuel inlet and a gas outlet, of a valve for controlling the supply of liquid fuel to the generating tube, a thermostat in thermal contact with the generating tube for opening said valve on said` generating tube attaining a predetermined tempera-ture, and a spring for closing' said valve.

2. In combination withV a generator tube adapted for operative connection at one end with a liquid fuel supply and having at its other end a gas outlet, of a valve for controlling the supply of fuel thereto7 a thermostat extending parallel with and in close prox-I imity to said generating tube and surrounding the same at the gas outlet end thereof for controlling the operation of said valve on said tube attaining a predetermined temperature7 and means for adjusting said valve to operate at different predetermined temperatures of said tube.

8; In combination with a generator tube adapted for operative connection at one end with a liquid fuel supply and having at its other end a gas outlet, of a valve for controlling the supply of fuel thereto, a thermostat extending parallel with and in close proximity to said generating tube and surrounding the same at the gas outlet end thereof for controlling the operation of said valve on said tube attaining a predetermined. temperature, and means for varying the stroke vof said valve to causethe same to operate in accordance with different, predetermined temperatures of said tube.

4. 1n combination with a generator tube adapted for operative connection at one end with a liquid fuel supply and at its other end with a gas outlet, of means for controlling `the supply of fuel thereto in accordance with a thermostat tube extending parallel with said generator tube, avalve within said fuel feed pipe and including a casing provided Vwith a fuel passage therethrough, a diaphragm across the casing, a connection between the end of said thermostat tube and said casing at one side of said diaphragm, a piston within said casing at the opposite side of said diaphragm, a needle valve adjustably carried thereby and adapted for operation by the movement of said piston to control the passage of fuel through said passage, a spring for maintaining said piston in contact with said diaphragm, and a closure plug in said casing adapted for removal to permit adjustment of said needle valve.

5. In a device of the character described, the combination of a burner, a generator tube overlying the same and subjected to the heat of said burner and adapted to form a passage for a fluid fuel discharging into said burner, a valve for controlling the supply of fuel to the generator tube, a spring for normally maintaining said valve closed, and a thermostat subjected to a temperature corresponding to that of the generator tube and opposing the pressure of said spring for operating said valve to open on the generator tube attaining a generating temperature.

6. In a device of the character described, the combination of a burner, a generator tube overlying the same and subjected to the heat of said burner and adapted toform a pasr sage for a fluid fuel discharging into said burner, a fuel feed pipe connected with said generator tube, a spring closed valve without the field of the burner for controlling the flow of fuel into the generator tube, and a thermostat acted on by a temperature corresponding to that of said generator tubev and connected with said valve to oppose the pressure of the valve closing spring, whereby said valve is maintained open on said generator tube attaining a predetermined temperature.

7 In a device of the character described, the combination of a burner, a generator tube overlying the same and subjected to the heat of said burner and adapted to form a passage for a fluid fuel discharging into said burner, a fuel feed pipe connected with said generator tube, a valve casing through which fuel supplied to said generator tube passes, a valve within said casing for controlling the passage of fuel therethrough, a spring within the casing for normally closing the valve, and a Vthermostat extended from the casing into proximity to said generator and into a temperature corresponding to that of said generator tube for moving said valve against the action of said spring whereby fuel is supplied to the generator tube on the same attaining a generating temperature.

8. In a device of the character described,v

the combination of a burner, a generator tube overlying the same and subjected to the heat of said burner and adapted to form a passage for a fluid fuel discharging into said burner, a fuel feed pipe connected with said generator tube, a valve casing through which fuel supplied to said generator tube passes, a valve Within said casing for controlling the passage of fuel therethrough, a spring Within the casing for normally closing the valve, a thermostat extended from the casing in proximity to said generator and into a temperature corresponding substantially to that of said generator tube, whereby said valve is moved against the actionof said spring to supply fuel to the generator tube on the same attaining a generating temperature, and means for controlling the stroke of said valve.

In testimony whereof I have signed myV

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