US2270443A - Flame production and control - Google Patents

Description

Jan. 20, 1942. J JARES 2,270,443

FLAME PRODUCTION AND CONTROL Filed March 15, 1941 Z2 V I fit I I: I. 7a

KQQ) '\L T 15 15 It Milli/010 16 Jasqvlz Jute/S,

' INVENTOR 5 BY Mm.

Patented Jan. 20, 1942 UNITED STATES PATENT OFFICE FLAME PRODUCTION AND CONTROL Joseph J ares, Teaneck, N. J.

Application March 15, 1941, Serial No. 383,560 I (01. 67-1) 6 Claims.

tained will appear or are set forth in the course of the following specification.

The drawing accompanying and forming part of the specification illustrates one practical commercial embodiment of the invention. Actual structure however may be modified and changed as regards this particular disclosure, all within the true intent of the invention as will be apparent from the following specification and broad scope of the claims.

Fig. 1 is a broken part sectional side elevation of one embodiment of the invention.

Fig. 2 is a broken detail view of one form of control valve for the powder feed mechanism.

The burner'structure illustrated comprises a Venturi air-gas mixer 3, into the open end of which a nozzle 4, discharges, said nozzle heing connected with a high pressure gas line 5. This gas line is shown equipped with a remotely controlled motor operated valve 6, which may be of conventional design and details of which are not shown.

A flame collecting and spreading head I, is shown set in a water seal trough 8, on the upper end of the venturijsaid head being in the form of an inverted truncated conical bowl having a substantially cylindrical deflector and confining wall or flange 8, at the upper larger open end of the same,

The burner tip is shown as a hollow head 9, screwed into the upper end of the collar portion In, of the water seal and having a central vertical port H, in the upper end of the same and a number of side ports 12, discharging horizontally into the upwardly divergent walls of the spreader bowl.

The flame coloring or other material is supplied to the burner through the injector action of the air mixer.

In the illustration, flame coloring material in the form of powder is supplied from one or more hoppers I3, 14, etc., through a spout or spouts such as indicated at I5, into a groove or channel It, in a rotating turntable II, which carries the material into the range of suction at the mouth of the venturi.

Usually, it is sufficient for the purpose, to simply have the grooved rim of the turntable rotate under the flared entrance to the venturi, at one side of the gas nozzle, substantially as indicated in Fig. 1.

In this relation of the parts, the powdered material carried by the turntable is entrained with the air drawn into the mixer and then carried by the air-gas mixture into the combustion zone at the burner head.

A propeller I8, journalled on a support I9, over the central vertical burner port ll, homogenizes the mixture and spreads and throws the color producing material outward across the bowl and against the confining rim 8, which thus may serve more or less as a bailie.

The upwardly angled propeller supporting arm I9, is shown as carried by a cover plate 20, removably secured over a handhole opening 2|, in the side of the collar I0 and the propeller is shown as of a size to pass freely downward through the central burner port and out through opening 2|, thus to enable ready removal and replacement of this distributing structure.

Ignition of the primary flame is effected in the illustration by a pilot indicated at 22, in the rim of the flame collector and whichmay be of the remote control of the electrically ignited type supplied with gas through a line 23, from the main gas supply line 5.

For colored flame effects, the mixture usually may be adjusted to produce a Bunsen type flame, practically colorless and more or less invisible.

The main or primary flame is under immediate control of the motor actuated valve 6, which may be remotely controlled for starting, stopping or regulating the size of such flame. The flow of the air-gas mixture through the central burner port ll, keeps the distributing propeller I8, in rotation.

The turntable ll, may be rotated by hand or by motor and be continuously, intermittently or arbitrarily operated.

Similarly, the flame coloring chemicals may be supplied in any desired relation, amount or timing as by means of valves 24, in the delivery spouts l5, operated electrically, for instance, from some remote control point.

The structure of the feed control valves 24, may vary quite widely. Thus as shown in Fig. 2, they may consist each simply of a valve element 25, carried by a rod 26, acted on by spring 21, to

hold the valve closed upward against its seat, the opening of the valve being efiected by an electro-magnet 28, having a movable core 29, connected with the valve by a lever 30.

For producing a succession of colors, the materials required for different colors may be arranged in layers in a hopper as indicated at 31', Fig, 1. By using hoppers of difierent color producing materials and control valves for each, the materials may be selected in any-order. to produce any color effects desired.

As the gas flame supplies the necessary heat for volatilization of the metallic salts, it is not color materials any fuel elements, oxidizing agents or stabilizers, such as required for colon: production with the solids used in firework dis.

plays.

or various mixtures of such salts.

Forreasons, of economy, it is usuallydesirable The invention contemplates use of any free flowing, preferably crystalline metallic. salt.

to dilute these metallic salts with some free flow--v ing combustible material, which. in addition'to reducing total cost, gives increased bulk, aiding in" better distribution By way of example, the pure.

metallicsalts may be diluted with small wood chips; spent coffee grounds, shredded 'corn or other dust free light weight combustible sub-i stance.

With dry sodium chloride, a brightyellow flame can-be created Yellowish green colors can .be

obtained with dry granulated copper sulphate.

Deep red is obtainable with stronium carbonate applied as. a coating to balsa" wood. chips; shre'ddedicorn or cofi'eegrounds treated with lithium fluoride will produce bright crimson.

Sawdust may be used asthe' bulk material satu rated with chemicals to give the desired coloreffects. In such cases, it is preferable to treat the material with awater-proofing" medium, such ,as ordinary dewaxed or wax free" alcoholic solution of shellac." Thiswater-proofing prevents 'materials which may be hygroscopic from absorbing moisture, which would make the powder sticky andpossiblyimpracticalto use in the manner disclosed.

While the turntable forms illustrated provide a desirable form of conveyor for transferring flamecoloring materials from a point of storage to a point 'within'the suction zone of the air mixer; it is contemplated that. other'forms of conveyors may be provided; such as those of the endless belt type, or ribbons carrying pellets'or particles of the color producing materials and the like.

While disclosed particularly for 'coloredflame.

continuous or discontinuous, in the latter event, it being in the nature of a series of separate receptacles for the material to be injected. The size of the turntable may vary to suit different circumstances and so may be quite large to carry a considerable amount of material, or be rela tively small. If desired, the turntable may be enclosed more or less, particularly to prevent escape of light powders.

What .is claimed .is:

1. Apparatus of the character disclosed, comprising a gas-air mixer of the injector type, a

conveyor having a range of travel from a point necessary or desirable to include with the solid removed from the field of suction into the field of suction at the inlet end of said gas-air mixer and means'for supplying material of a character adapted to be removed by the injector suction,

to said conveyor at a'point removed from the in-- fluence of suction of said gas-air mixer.

2. Apparatus of the character disclosed, comprising a gas-air mixer "of' the "injector type;ya

conveyor'having a range of travel from a point removed from the .field of suctioninto the field of suction at the inlet end of said gas-air mixer and one or more supply reservoirs having valved discharges controllable to deposit material on said conveyor at a point removed from the field of suction.

3. In apparatus of the "character disclosed, an uprightgas-air mixer of the injector typeya substantially horizontally disposed turntable mounted to rotate into the range of suction created by said mixer and means for depositing materials to be combined with the gas-air mixer onto said turntable.

4. In apparatus of the character disclosed, an

upright gas-air mixer. of the injector type, a substantially horizontally disposed. turntable mounted to rotate into the range of suction created by said mixer, means for depositingmaterials to be combined with the gas-air mixer onto said turn-' table and including one or more material holding hoppers located above and positioned to discharge onto said turntable.

5. In apparatus of the character disclosed, an

upright gas-air mixer of the 'injectortypaa subs: stantially horizontally disposed turnt'ablemount ed to rotate into the range of suction created by. said mixer, means for depositing materials to be combined with the gas-air mixer onto said 1turn-'- table, said turntable having a gmaterial receiwi" ing and, confining groove.

of the Venturi tube and a rotary distributor at the central burner port.

JOSEPHJJARESL'

Images