Spraying and smoke-laying apparatus

Claim 2

IN AN APPARATUS FOR FUEL CONSUMPTION AND EJECTING A FLOWABLE MEDIUM, AS FOR SPRAYING OR SMOKE LAYING; A CONTAINER FOR SAID MEDIUM A PULSATING BURNER HAING AN INTAKE END FOR ADMISSION OF A COMBUSTION MIXTURE AND A DISCHARGE END, AND A BURNER RESONATOR HAVING ONE END CONNECTED TO THE BURNER DISCHARGE END AND THE OTHER END OPEN TO FORM A DISCHARGE ORIFICE, CONDUIT MEANS LEADING FROM SAID MEDIUM CONTAINER TO SAID BURNER RESONATOR TO SUPPLY SAID MEDIUM THERETO, AN AIR RESONATOR TUBE WITH AND SURROUNDING SAID BURNER AND BURNER RESONATOR AND HAING AN AIR INLET UPSTREAM OF THE INTAKE END OF SAID BURNER RESONATOR AND OPEN AT THE OTHER END TO FORM A DISCHARGE ORIFICE ADJACENT THE DISCHARGE END OF SAID BURNER RESONATOR AN AIR INLET CONNECTED TO SAID BURNER, VALVE FORING MEANS CONNECTED TO THE AIR INLET END OF SAID AIR RESONATOR TUBE SAID BURNER INCLUDING AN END SECTION FORMING A MIXING PASSAGE LEADING SUBSTANTIALLY AT RIGHT ANGLES INTO SAID ONE END OF SAID RESONATOR THE LENGTH OF SAID PASSAGE BEARING A PREDETERMINED RATIO TO THE LENGTH OF SAID AIR RESONATOR TUBE, ASSAID CONDUIT MEANS LEADING FROM SAID MEDIUM CONTAINER TO SAID BURNER RESONATOR BEING CONNECTED TO THE LATTER NEAR THE DISCHAGE END THEREOF, SAID BURNER INCLUDING A CARBUREOR HAVING A TURBULENCE CHAMBER SPACED FROM THE END OF SAID MIXING PASSAGE OPPOSITE THE BURNER END OF THE PASSAGE, A FUEL NOZZLE COAXIAL WITH THE MIXING PASSAGE AND INTERPOSED BETWEEN THE MIXING PASSAGE AND TURBULENECE CHAMBER ANDD SPACED FROM THE ADJACENT END OF THE MIXING PASSAGE, A HELICAL STRIP IN THE END OF SAID END SECTION AND A BAFFLE PLATE AT THE DOWNSTREAM END OF SAID STRIP DEFINING AN ANNULAR SPACE WITH SAID MIXING PASSAGE SAID AIR INLET COMMUNICATING WITH THE SPACE BETWEEN SAID MIXING PASSAGE AND SAID NOZZLE AND INGITION MEANS ON THE DOWNSTREAM SICDE OF SAID BAFFLE PLATE FOR IGNITING THE FUEL-AIR MIXTURE IN SAID PASSAGE.

Claim 3

An apparatus according to claim 1 in which said valve forming means at the air inlet end of said air resonator tube is located upstream from said one end of said burner and comprises a plate having perforations therein which taper inwardly toward said air resonator tube.

Claim 4

An apparatus according to claim 2 in which said resonator tubes are tuned relative to each other such that at a natural frequency on the order of from about 60 to about 150 Hertz the oscillations in said burner resonator are displaced about a half cycle from the oscillations in said air resonator tube.

Claim 5

An apparatus according to claim 1 which includes a shut-off device with valve and a filter in series in said conduit means leading from said medium container to said burner resonator, a control valve in series with said shut-off device with valve and filter, a housing member in which said valve and filter are mounted to form a unit, said control valve being spring biased toward closing position and including a movable diaphragm surface within an expansible pressure chamber responsive to pressure to urge the control valve in opening direction, a conduit leading from said carburetor to said surface to supply pressure thereto and including a check valve opening toward the surface, communication means connecting said surface to the atmosphere, and lock means for releasably holding said control valve in closed position.

Claim 6

An apparatus according to claim 1 which includes a fuel tank and a fuel conduit leading therefrom to said nozzle, said carburetor and fuel tank forming a unitary structure.

Claim 7

An apparatus according to claim 5 which includes a first conduit leading from the space between the said nozzle and the said passage to said medium container to supply pressure thereto and having a check valve opening toward the medium container, a control valve in said conduit means leading from said medium container and spring-urged toward closed position and having a movable surface within an expansible pressure chamber responsive to fluid pressure to open the control valve, a second conduit leading from said space to said expansible chamber and having a check valve opening toward said expansible chamber, communication means connecting to the atmosphere to permit said control valve to close upon interruption of the supply of pressure from said second conduit to said expansible chamber, and fuel flow metering means in said fuel conduit to control the flow of fuel from said tank to said nozzle.

Claim 8

An apparatus according to claim 6 which includes a passage-forming means from the space at the downstream side of said nozzle to said conduit means to assist in the flow of said medium to said burner resonator.

Claim 9

An apparatus according to claim 6 which includes a passage-forming means from the space at the downstream side of said nozzle to said fuel tank above the fuel therein.

Claim 10

An apparatus according to claim 6 in which said space at the downstream end of said nozzle is subjected to pressure when combustion takes place at the downstream side of said disc and is subjected to subatmospheric pressure between incidents of combustion, and said air inlet is disposed between the atmosphere and said space and is in the form of an opening toward said space.

Claim 11

An apparatus according to claim 6 in which said fuel flow metering means comprises a housing part having a tubular channel connecting said fuel conduit to said nozzle, a filter at the upstream end of said channel, a bushing in the channel at the downstream end of said filter having a central bore, a plug adjustable in said bushing for opening and closing the downstream end of said bore, and a needle valve adjustable in said plug for adjustably controlling the flow of fuel through said bore.

Claim 12

An apparatus according to claim 10 in which said filter and bushing and plug and needle valve are in the form of a unitary structure insertable in and removable from said channel as a unit, said housing part including a separable portion defining at least a part of said second conduit and a part of said channel, said bushing having an end flange overlying said separable portion and being threaded into said housing part thereby to clamp said portion to said housing, said portion having therein the said check valve in said second conduit and a filter element serially connected to the check valve.

Claim 13

An apparatus according to claim 10 in which said plug is threaded into said bushing and has one end protruding from the bushing, a handle removeably mounted on the protruding end of said plug, and means on the bushing to limit the rotation of said handle when mounted on the plug.

Claim 14

An apparatus according to claim 10 which includes a manually operable air pump, and a conduit connecting the discharge side of said air pump to said turbulence chamber and including a check valve opening toward said turbulence chamber.

Claim 15

In an apparatus for fuel consumption and ejecting a flowable medium, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner and burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, a shut off device with valve and a filter in series in said conduit means leading from said medium container to said burner resonator, a control valve in series with said shut off device with valve and filter, a housing member in which said valve and filter are mounted to form a unit, said control valve being spring biased toward closed position and including a movable diaphragm surface within an expansible pressure chamber responsive to pressure to urge the control valve in opening direction, a conduit leading from said carburetor to said surface to supply pressure thereto and including a check valve opening toward the surface, communication means connecting said surface to the atmosphere, and lock means for releasably holding said control valve in closed position, said housing member being formed of two parts in face-to-face sealed engagement and defining therebetween the portions of said conduit means leading between said valve and filter.

Claim 16

In an apparatus for fuel consumption and ejecting a flowable medium, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner and burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, a shut off device with valve and a filter in series in said conduit means leading from said medium container to said burner resonator, a control valve in series with said shut off device with valve and filter, a housing member in which said valve and filter are mounted to form a unit, said control valve being spring biased toward closed position and including a movable diaphragm surface within an expansible pressure chamber responsive to pressure to urge the control valve in opening direction, a conduit leading from said carburetor to said surface to supply pressure thereto and including a check valve opening toward the surface, communication means connecting said surface to the atmosphere, and lock means for releasably holding said control valve in closed position, said housing member being formed of two parts in face-to-face sealed engagement and defining therebetween the portions of said conduit means leading between said valve and filter.

Claim 17

In an apparatus for fuel consumption and ejecting a flowable mediUm, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner and burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, a shut-off device with valve and a filter in series in said conduit means leading from said medium container to said burner resonator, a control valve in series with said shut off device with valve and filter, a housing member in which said valves and filter are mounted to form a unit, said control valve being biased toward closed position and including a movable surface within an expansible pressure chamber responsive to pressure to urge the control valve in opening direction, a conduit leading from said burner to said surface to supply pressure thereto and including a check valve opening toward the surface, communication means connecting said surface to the atmosphere, and lock means for releasably holding said control valve in closed position, said control valve including a reciprocable valve member and said surface being on a diaphragm connected in the center to said valve member and on one side forming said movable surface within an expansible pressure chamber, said diaphragm at the periphery being sealed to said housing member, said communication means and said conduit extending through said housing member on said one side of said diaphragm, the other side of said diaphragm having substantially free communication with the atmosphere.

Claim 18

In an apparatus for fuel consumption and ejecting a flowable mediUm, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner and burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, a shut-off device with valve and a filter in series in said conduit means leading from said medium container to said burner resonator, a control valve in series with said shut off device with valve and filter, a housing member in which said valves and filter are mounted to form a unit, said control valve being biased toward closed position and including a movable surface within an expansible pressure chamber responsive to pressure to urge the control valve in opening direction, a conduit leading from said burner to said surface to supply pressure thereto and including a check valve opening toward the surface, communication means connecting said surface to the atmosphere, and lock means for releasably holding said control valve in closed position, said control valve including a reciprocable valve member and said surface being on a diaphragm connected in the center to said valve member and on one side forming said movable surface within an expansible pressure chamber, said diaphragm at the periphery being sealed to said housing member, said communication means and said conduit extending through said housing member on said one side of said diaphragm, the other side of said diaphragm having substantially free communication with the atmosphere.

Claim 19

In an apparatus for fuel consumption and ejecting a flowable medium, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner and burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, said burner including an end section forming a mixing passage leading substantially at right angles into said one end of said resonator, the length of said passage bearing a predetermined ratio to the length of said air resonator tube, said conduit means leading from said medium container to said burner resonator being connected to the latter near the discharge end thereof, said valve forming means at the air inlet end of said air resonator tube being located upstream from said one end of said burner and comprising a plate having perforations therein which taper inwardly toward said air resonator tube, and electrical means for supplying energy to said ignition means, said electrical means being disposed between said medium container and said fuel tank.

Claim 20

In an apparatus for fuel consumption and ejecting a flowable medium, as for spraying or smoke laying: a container for said medium, a pulsating burner having an intake end for admission of a combustible mixture and a discharge end, and a burner resonator having one end connected to the burner discharge end and the other end open to form a discharge orifice, conduit means leading from said medium container to said burner resonator to supply said medium thereto, an air resonator tube coaxial with and surrounding said burner and burner resonator and having an air inlet upstream of the intake end of said burner resonator and open at the other end to form a discharge orifice adjacent the discharge end of said burner resonator, an air inlet connected to said burner, valve forming means connected to the air inlet end of said air resonator tube, said burner including an end section forming a mixing passage leading substantially at right angles into said one end of said resonator, the length of said passage bearing a predetermined ratio to the length of said air resonator tube, said conduit means leading from said medium container to said burner resonator being connected to the latter near the discharge end thereof, said valve forming means at the air inlet end of said air resonator tube being located upstream from said one end of said burner and comprising a plate having perforations therein which taper inwardly toward said air resonator tube, and electrical means for supplying energy to said ignition means, said electrical means being disposed between said medium container and said fuel tank.