US1231715A - Vapor-lamp. - Google Patents

Description

F. E. DAVIS.

VAPOR LAMP.

APPLICATION FILED NOV. 28. 1914.

Pitehted. July 3, 1917.

3 SHEETS-SHEET 1.

F. E. DAVIS.

VAPOR LAMP.

APPLICATION FILED NOV. 28. 1914.

Patented July 3, 1917,

3 SHEETS-SHEET 2.

F. E. DAVIS.

VAPOR LAMP.

APPLICATION FILED NOV. 28. I914.

Patented July 3, 1917.

3 SHEETS-SHEET 3.

.zhniigil more err PATNT FFll.

FRED E. DAVIS, OF FREEPORT, ILLINOIS, A-SSIGNOR TO PERFECTION VAPOR LIGHT (30., OF FREEPORT. ILLINOIS, A CGRPORATION OF ILLINOIS.

VAPOR-LAMP.

'1 '0 all whom it may concern.

lie it known that I, F nun E. DAVIS, a citizen of the United States, and. a resident of Freeport, county of Stephenson, and State of Illinois, have invented certain new and useful Improvements in Vapor- Lamps, of which the following is a full, clear, and exact description.

The invention relates to vapor lamps and seeks to provide eflicient means for vaporizing kerosene, gasolene and the like, mixing the vapor with air and burning the mixture to heat a mantle to incandesoence. The invention consists in the features of improvement hereinafter set forth, illustrated in the preferred form in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of the lamp with the tank or base and the shade shown in section. Fig. 2 is a vertical section of the gas generator and burner. Figs. 3 and 4 are detail sections'on the lines 3-3 and H, respectively, of Fig. 2'. Fig. 5 is a sectional view of the tipcleaning device. Fi s. 6, 7 and 8 are vertical sections of the lamp standard and the fuel supply and generator pipes, illustrating improved means for controlling the fuel supply of the lamp. Fig. 9 is a cross section on line 99 of Fig. 7.

The preferred form of the improved lamp is provided with a hollow base which forms a tank for the fuel supply. This base or tank is formed of. an upper dome-shaped shell 1 and a slightly dished bottom 2. The outer shell has a reverted or Ll shaped flange 3 at its edge and the bottom 2 isprovided with a down-turned flange 4 extending be tween the members of the U-shaped flange 3 and soldered or otherwise suitably secured thereto to form a tight joint. The central top portion of the tank is provided with a depending, internally threaded flange or nipple 5 having a flat upper end face. A valve casing 6 formed of cast metal is provided with a reduced, screw-threaded lower end portion 7 which engages the. threads of the flange or nipple The shoulder of the valve casing 6 adjacent its lower end is provided with an annular groove for receiving the metallic packing 8 that engages the flat surface at the upper end. the tank to form a tight joint, indicated in Fig. 2;

Specification of Letters Patent.

. At its upper end or tip Patented July 3, 1917.. Serial No. 874,511.

A supply pipe 9 is threaded into the lower end of the valve casing and extends downwardly to a point adjacent the bottom of the tank. This pipe communicates with a bore 10 extending through the valve casing and the flow (if liquid fuel therethrough is controlled by a needle valve 11 which is threaded into a horizontal bore in the valve casing. A suitable stufling box 12 prevents leaking around the stem of the valve.

A nipple 13 (see Fig. 1) extends through an opening in the upper portion of the base or tank and is provided with an enlarged outer end portion and a screw-threaded portion that extends through a washer 14-. This washer engages the inner wall of the tank and a packing l5 interposed between the outer face of the tank and the enlarged outer end face of the nipple forms a tight joint. A valve casing 16 is arranged within the outer endof the nipple and is provided with a flange 17 which over laps the outer end thereof. A cap 18 extending over the flange is threaded on the outer end portion of the nipple and holds the valve casing in place. The flange 17 is preferably provided with metallic packing 17 which abuts againstthe outlet end of the nipple and forms a tight joint therewith. The bore of the valve casing 17 is provided with an inwardly opening. ball check-valve l9 and a hollow needle valve 20 is threaded into the outer portion of the bore of this valve casing and cooperating with a suitable seat adjacent the check valve 19. By loosening the valve 20, air can be forced, by means of a suitable small pump, into the tank to place the liquid fuel therein under pressure. During the pumping operation, the check-valve 19 prevents back flow of air and when the desired pressure is reached, the valve 20 can be closed.

A vertical pipe or tube 21 is threaded at its lower end into the valve casing 6 and communicates with the'bore thereof. This pipeserves as a support for the burner and generator and also as a supply pipe therefor. The generator pipe or tube 22 is threaded upon the upper end of the pipe 21. the generator pipe 22 is provided with a minute discharge orifice 23 for the generated vapor and the bore of the generator pipe is provided with a conical portion leading to the discharge orifice extending pipe 21.

A suitable tip cleaner is provided for the orifice 23 and comprises a fine wire 25 upon the upper end of a rod which extends through the generator pipe 22 and upwardly Preferably, this rod is formed of two sections 26 and 27 which are threaded at their adjacent ends into a suitable coupling 28. This coupling fits quite loosely within the generator pipe so that ample opportunity is afforded for the fiow of fuel around it but the coupling serves as a guide for the upper end of the tip cleaning rod. The lower end of the rod section 27 is enlarged to form a similar guiding portion and is provided with annular rack teeth 29 which are arranged to be engaged by gear teeth 30 on the inner end of a stem 31. This stem extends rotatably through a transverse bore in the valve casing 6 and a suitable stuffing box 32 is provided for preventing leaking. By rotating the stem 31, the cleaning device is raised andlowered to pass the fine wire pin or needle 25 throughthe orifice 23 to clear the same. The rod section 26 is provided with a conical upper end portion 26 which cooperates with the conical part 24 of the bore of the generator pipe, when it is desired to cut off the flow of vapor through the passage orifice 23.

The tip cleaning pin or needle 25 is formed of tempered steel and, in mounting it upon the rod 26, it is first inserted through a fine tube 33 and its lower end is hooked around the lower end of the tube. The latter is then inserted in a bore formed in the upper end of the rod and by means of a burnishing tool or other suitable means the metal at the other end or tip of the rod 26 is swaged down upon and over the upper end of the tube 33 and at the same time the metal of the tube 33 is crimped upon the fine wire or pin 25. In this way, the wire tip cleaner is cheaply and securely fastened to the upper end of the rod 26.

Air inlets are provided above the tip of the generator tube so that as the generated vapor passes from the discharge orifice 23, air will be drawn in and the mixture will pass .to a mixin chamber or passage which has a portion leading upwardly from the discharge orifice 23 and another portionleading downwardly to an inverted burner head which surrounds the generator tube. In the construction shown, these parts comprise outer cylinder sections 34 and 36 and an inner pipe 35. The cylindrical section 34 is provided with a transverse portion 37 extending diametrically from side to side thereof which is bored out to form air inlet ports 38. The cross piece 37 is also provided with a depending, internally threaded flange 39 which engages the reduced,thread ed upper end or tip of the generator tube. A second internally threaded flange on the upper portion of the cross piece 37 receives the pipe 35 which is thus secured thereto, at its lower end and 111 lme with the discharge orifice 23. The section or shell 36, as shown,

is threaded into the upper end of the section 34 and is provided with a closed upper end portion 41 extending over the upper end of the pipe 35. Preferably, as shown, the shell 36 and its upper end portion are formed of pressed sheet metal and the end portion 41 is provided with a projection or lug 42 upon which a hanging; device 43 is threaded. This part may be used to hang the lamp in elevated position if desired. To prevent the entrance of air from which the oxygen has been removed into the ports 38, outwardly extending pipes 44 are preferably threaded into these ports, as shown.

The lower. portion of the section '34 forms an inverted burner head about the generator pipe 22. It is provided with a slitted screen 45 which is preferably flanged and threaded to a suitable seat in the lower end of the casting or burner head 34. This screen, of course, is provided with an opening through which the generator pipe 22 extends.

For holding the mantle 46 in place, the burner head is provided adjacent its lower end with a laterally projecting flange 47. The upper portion of .the mantle extends over this flange and is gathered and tied in burner head above the flange. For receiving the lower end of the mantle, the gener- V ator pipe is provided with a flange 48 having a groove beneath it within which the lower end of the mantle is gathered and tied, as indicated in Figs. 1 and 2.

A starting cup 49 containing a body of asbestos is fixed to the pipe 21 below the burner. Preferably, as shown, this starting cup is threaded upon a short pipe section 51 that is brazed or otherwise suitably secured to the pipe 21. It also preferably supports a holder for a chimney 52 that extends upwardly around themantle 46. The holder shown comprises an annular part 53 provided with laterally projecting arms54 having seats at their outer ends for the lower end of the chimney. The annular part 53 fits within the upper part of the starting cup 49 and is held in place by a clamp screw 55.

A fianged, ornamental nut 56 (see Fig. 1) is adjustably threaded upon the pipe section 51 and engages the upper end of a cylinder or tube 57 formed of insulating material. The lower end of this tube (see Fig. 2) engages an annular seat formed on the upper end of the valve casing 6. Vhenthe lamp is burning, the metal parts adjacent the burner are quite hot but the insulating cylinder or tube 57 forms a handle by means of which the lamp may be readily carried.

A shade 58 is supported about the burner by means of a suitable holder. This shade holder comprises a cylindrical, flanged portion 59 which fits over the part 13 and rests upon the upper end 41 of the shell 36. Suitable arms 60 extending from the part 59 carry an integral ring 61 to which the upper end of the shade is secured in the usual manner by screws 62.

The mantle is open-ended and preferably an unfinished, sleeve mantle is used so that it can be readily placed in position by removing the shade, shade holder and chimney and by unscrewing the air inlet pipes 14. The mantle can then he slipped over the mixing chamber and burner head and its upper and lower ends gathered and tied about the burner head and generator tube to properly inclose the inverted flame. In starting the lamp, the orifice 23 is closed by means of the valve rod and the valve 11 is open to admit liquid fuel to the pipes 21 and 22. The body of asbestos 50 in the starting cup is saturated with alcohol which is lighted to thereby heat the upper portion of the pipe 21 and the pipe 22 to initiate the generation of vapor. Valve rod 26 is then shifted to open the port 23. As the fine stream of vaporized fuel passes through the port 23, air is drawn in and the mixture passes upwardly through the pipe 35 and thence downwardly through the shell 36 to the burner head. As the mixture passes through this inverted or U-shaped passage, it is thoroughly mixed and at the burner head it is ignited and burns in the usual manner to heat the mantle 46 to incandescence. The inverted burner head extends about the generator pipe 22 and supplies all the heat necessary to vaporize the liquid fuel so that no other burner is required for this purpose after the lamp is started. The valve 11 controls the fiow of liquid fuel to the generator pipes 21 and 22 and the flow of vapor. from the latter is controlled by the valve rod 26. The valve rod also forms a tipcleaning device, as described.

In the forms shown in Figs. 6, 7 and 8, improved means are provided for regulating the flow of vapor to the mixing chamher, which reduce the cost of manufacture and simplify the operation of the lamp. Like the construction already described, each of these forms is provided with a vertical supply pipe 21, having a generator pipe 22 threaded on its upper end. The latter is similar in construction to the generator pipe shown in Fig. 2, except that the upper portion of its bores is somewhat reduced in diameter and it is provided intermediate its ends with a shoulder or valve seat 68. Each of these forms is also provided with a rod 26 carrying a cleaning needle 25 for the dis charge orifice of the generator tube and the rod 26 is connected to a rod 27 by a coupling section 28'. In these forms the coupling section 28 is provided with a conical upper &

end or valve 64, which cooperates with the valve seat or shoulder 63 to cut oh the flow of vapor through the generator tube.

In the form shown in Fig. 6 the lower end of the rod 27 is threaded into the upper end of a tube 65, which is threaded at its lower end into a casting or bushing 66. This casting or bushing, like the valve casing 6 in Fig. 1, is provided with a reduced external threaded lower end 7 which is threaded into the nipple 5 at the upper portion of the fuel supply tank 1. The casting 66 is also provided with a hexagonal flange 67 which overlaps the upper end of the nipple 5 and which is grooved to receive the packing 8. The pipe 9 which extends downwardly into the tank is threaded into the lower end of a casting or bushing 66 and communicates through the bore thereof with the pipe 65. The latter is provided with orifices 68 through which the liquid fuel passes to the pipe 21 and generator pipe or tube 22.

It should be noted that in this form the valve rod 27 and valve 6 are fixed in position and means is provided for shifting the pipes 21 and 22 relatively to the valve and valve rod to thereby control the flow of fuel from the discharge orifices of the generator pipe. For this purpose the lower end of the pipe 21 is threaded or screwed in liquid-tight fashion into the upper end of a part 69 which is adjustably mounted upon the bush ing 66. The bore of the part or member 69 is provided, intermediate its ends, with an internal screwed thread portion, which engages the reduced, threaded upper end portion of the casting or bushing 66. The main cylindrical body of the bushing 66 extends through the lower portion of the bore of the part or member 69. This lower portion of the bore of the part or member 69 is enlarged and forms a stuffing box to receive a packing 71 and a packing gland 72. In this manner a liquid tight joint is formed between the casting or bushing 66 and the member 69, which is adjustably threaded thereon. The member 69 may be adjusted by rotating it so that the pipes 21 and 22 are shifted longitudinally relatively to the valve 64 and the valve rods 26 and 27. In this way the valve 6% and its valve seat 63 cooperate to permit or out 01f the supply of vapor from the discharge orifice of the generator tube, and the upper portion of the latter cooperates with the conical end portion 26 of the valve rod 26 in controlling or regulating the flow of vapor.

The lower portion of the part or member 69 is practically hexagonal in outline, while its upper reduced portion 73 is shaped to [it within the lower end of the insulating handle 57, which is preferably cylindrical. As in. the form previously described, the upper end of the insulating handle is engaged by an ornamental nut 56 which is threaded on the lower end of .a pipe 51, the latter being brazed or otherwise suitably secured to the pipe 21 and carrying at its upper end a starting cup 4:9. The insulating handle is securely gripped between the nut 56 and the member 69, so that it not only serves as a means for transporting the lamp but also by turning the handle, it serves to adjust the member 69 and the parts carried thereby upon the fixed casting or bushing 66 and thereby regulate the flow of fuel to the lamp. The flange of the packing gland 72 and the lower portion of the part or member (39 are preferably hexagonal in outline so that they may be engaged by suitable wrenches.

In the form shown in Fig. 8, the member (39 is provided with a reduced lower end portion 7%, which is provided with external screw threads that engage internal screw threads formed in the enlarged upper portion of the bore of the casting or bushing 66. The bushing 66 is provided with ex ternal screw threads which engage an internally screw-threaded stu'lling-box 75, which carries packing 76 about the reduced lower end of the adjusting part or member 69. In this form the lower end of the rod 27 is threaded into the lower portion of the casting or bushing 66 and the latter is provided with a port or discharge 77 on one side of the rod 27 and through which the liquid fuel passes from the pipe 9. In other respects this construction is similar to that shown in Fig. 6 and the flow of vapor to the mixing chamber and burner of the lamp is controlled by rotating the handle 57 and the part or member 69 to raise and lower the pipes 21 and 22 relatively to the fixed conical valves 26 and G l. These constructions obviate the necessity of employing valve stems which project laterally through stuffing boxes and also provide means whereby the lamp may be very readily controlled.

The form shown in Fig. 7, like that shown in Fig. 8, is provided with a stufiing box 75 which is threaded upon the upper reduced end of bushing 66 and carries packing 7 6 about the lower reduced end portion 7a of the adjusting part or member 69". In this form the bushing 66 is provided with a part 78 which is rectangular in outline and fits within the correspondingly shaped bore of the part 7 4. By reason of this construction the member 69" is held against rotation relatively to the bushing 66 but is free to move in vertical direction.

An adjusting nut 79 surrounds and is threaded to the upper portions of the stuffing box 75 and the part 74. One of the threads of the adjusting nut is a righthand thread and the other is a lefthand thread, so that by turning the nut in opposite directions the member 69 and the parts carried thereby may be raised and lowered. This adjusting nut is preferably rotated by means of a sleeve 80, which extends over the bushing 66", the stuffing box '75, the adjusting nut 7 9 and the lower portion of the member 69, and which is secured to offset projections on the adjusting nut 7 9 by means of screws 81, as most clearly shown in Fig. 9.

The valve rod in this form could be fixed if desired as shown-in the Figs. 6 and 8, but it is preferably provided at its lower end with a. valve and is mounted to move vertically to a limited extent to thereby open and close a port 82 extending axially through the bushing 66, and through the part 7 8 of the bushing. The upper portion of the bore through the part 78 is enlarged to receive the lower reduced end of the rod 27 and the extreme lower end of the latter is provided with a conical portion or valve 83 which cooperates with the valve seat to open and close the port or discharge 82. The rod 27 is connected at its lower end to the part 78 by a cross pin 84 which extends through vertically elongated slides 85 in the upper portion of the part 78 so that the. valve 83 on the lower end of the rod has a vertical limited movement suflicient to close the port 82. A spring 86 coiled about the lower reduced end of the rod 27 extends between a shoulder 87 thereon and the end of the part 78 and tends to shift the valve 83 to its open position. hen the part 69 and the pipes 21 and 22 carried thereby are in the lowermost position shown in the drawing, the engagement of the valve seat or shoulder 63 with the valve 64: on the upper end of the valve rod 27 will hold the latter depressed with the valve 83 in closed position and the spring 86 compressed. By rotating the sleeve 80 and the adjusting nut 79, the member 69 and the parts carried thereby are raised. During the first portion of this lifting movement, the spring 86 is expanded so that the valve 83 is lifted to open the port 82 and permit the flow of liquid into the pipe 21 and generator pipe or tube 22. During this initial movement of the parts l1OWGV6I,thG valve'64: will remain closed, since it will be pressed by the spring 86 against its seat 63. At the end of this initial movement of the parts the pin 84 will engage the upper ends of the slots 85 so that the continued movement of the member'69 and of the parts 21 and 22 will move the shoulder or seat 63 away from the valve 64 and permit the flow of vapor into the mixing chamber and burner of the lamp. In this construction, means is thus provided for successively opening and closing the valves 83 and 64. which control respectively the admission of liquid fuel to the generator pipe and the discharge of vapor fuel therefrom. 7

It 1s obv1ous that numerous changes may be made inthe. details set forth without departure from the essentials of the invention as defined in the claims.

I claim as my invention 1. In a vapor lighting apparatus, a vertical generator pipe having a discharge port at its upper end, a downwardly extending mixing passage having an inlet above and in line with said discharge port, an inverted burned head encircling said generator pipe and communicating with said mixing passage, and an open-ended sleeve mantle encircling said generator pipe and secured at its upper and lower ends about said burner head and said pipe respectively, substantially as described.

2. In a vapor lighting apparatus, a vertical generator pipe having a discharge port at its upper end, an inverted burner head encircling the upper encl of said generator pipe, a mixing chamber arranged above said burner head and communicating therewith and having an inlet above and in line with the discharge port of said generator pipe, and an open-ended, sleeve mantle encircling said generator pipe, said burner head and said generator pipe having flanged portions about which the upper and lower ends of said mantle are secured, substantially as described.

3. A vapor lamp comprising a hollow base or tank, a fuel supply pipe leading therefrom, a vertical generator tube communicating with said supply pipe and having a discharge port at its upper end, and an inverted mixer having a burner head at its lower portion removably mounted at the upper end of said generator tube with its inlet portion above and in line with said discharge port and with said burner head encircling the upper end of said tube, and an open-ended inverted mantle surrounding said generator tube and having its u per and lower ends retained in position a out said burner head and said tube respectively to inclose the inverted flame.

4:. In a lighting apparatus, the combination with a fuel supply pipe, of a generator tube leading from said pipe and having a discharge port through which the fuel is sprayed, a mixing chamber or passage having an inlet in line with said discharge port, and an inverted burner head communicating with said passage and encircling said generator pipe and adapted to engage the upper end of a mantle and support the same about said generator tube, the latter having means for engaging the lower erd of the mantle, substantially as described.

5. In a lighting apparatus, a vertical generator pipe having a discharge orifice at its upper end, an inverted, cylindrical burner head mounted upon the upper end of said generator pipe and having an annular screen in its lower portion surrounding said generator pipe, an open-ended, sleeve mantle encircling said burner head and said generator pipe, and an inverted mixing chamber above said burner head and over which saidcsleeve mantle may be passed, said mixing chamber having an inlet arranged above and in line with the discharge port of said generator pipe, and said burner head and said generator pipe having grooved portions to which the upper and lower ends of said sleeve mantle are secured, substantially as described.

6. In a lighting apparatus, a vertical generator pipehaving a discharge orifice at its upper end, an inverted cylindrical mixer burner head having a transverse hollow portion forming air inlet ports and detachably engaging the upper end of said generator pipe, an annular screen at the lower Y end of said burner head, the latter being adapted to support an inverted mantle about said generator pipe, and a vertical pipe mounted on said transverse hollow portion and communicating therewith and arranged within said mixing chamber and above and in line with the discharge port of said generator, substantially as described.

7. In a lighting apparatus, a vertical generator pipe having a discharge orifice at its upper end, an inverted cylindrical mixer and burner head having a transverse hollow portion forming air inlet ports and engaging the upper end of said generator pipe, an annular screen at the lower end of said burner head, the latter being adapted to support an inverted mantle about said generator pipe, a vertical pipe within said mixing chamber, mounted on and communicating with said transverse hollow portion and arranged above and in line with the dis charge port of said generator pipe, and laterally projecting air inlet pipes secured to said burner head and communicating with said transverse hollow portion, substantially as described.

8. In a lighting apparatus, the combination of a fuel pipe, a bushing connected to said pipe, a longitudinally movable generator pipe adjustably mounted at one end upon said bushing and having a discharge orifice at its opposite end, a stufiing box and packing interposed between said bushing and said longitudinally movable generator pipe and a valve rod having a valve thereon arranged within said generator pipe and connected to said bushing, said movable generator pipe having a seat cooperating with said valve, substantially as described.

9. In a vapor lamp, the combination of a hollow base or tank, a fuel supply pipe leading therefrom, a bushing mounted on said tank to which said fuel supply pipe is connected, a vertical, longitudinally movable generator pipe adjustably connected at its lower end to said bushing, communicating with said fuel supply pipe and having a discharge port at its upper end, a stuffing box and packing interposed between the lower end of said movable generator pipe and said bushing anda valve rod having a valve at its upper end arranged within said generator pipe and connected at its lower end to said bushing, said generator pipe having a valve seat adjacent its upper end cooperating with said valve, substantially as described.

10. A vapor lamp comprising a hollow baseor tank, a fuel supply pipe leading therefrom, a bushing secured to said tank to which said fuel supply pipe is connected, a vertical, longitudinally movable generator pipe having a discharge port at its upper end and an adjustable, screw-threaded connection at its lower end with said bushing, said bushing having a passageway therethrough connecting said fuel supply and generator pipes, a stuffing box and packing forming a liquid-tight joint between said bushing and said adjustable generator pipe, a valve rod arraiged within said generator pipe andconnected at its lower end to said bushing and having a valve at its upper end, said generator pipe having a seat cooperating with said valve, and an insulating sleeve or handle surrounding said generator pipe and secured thereto, substantially as described.

11. In a vapor lighting apparatus, the combination of a fuelsupply pipe, a generator pipe communicating at one end" with said fuel supply pipe and having a discharge port at its opposite end and a springheld valve rod in said generator pipe and having a valve at one end' for controlling the admission of liquid fuel to said generator pipe, and a valve at its opposite end controlling the discharge of vapor from said discharge port, said. generator pipe being lon'giti'idinall y movable to control said valve rod and successively effect the admission of liquid fuel to said generator pipe and the discharge of vapor therefrom, substantially as described.

Illna vapor lighting apparatus, the combination of a fuel supply pipe, a bushingconnected with said supply pipe, a longi'tudinally movable generator pipe adjustably connectedr at one end to said bushing and havinga discharge port at its opposite end, a stuffing boxand packing forming a liquid-tight joint between said bushing and sai'dgeneratorpipe, said bushing having an inlet port connecting said fuel supply and generator pipes, a valve rod in said generator pipe having valves at its opposite end for controlling said inlet and discharge ports, said ,valve rod having a pin-and-slot connectionwith said bushing and a spring tending to shift said valve rod to open said inlet port, substantially as described.

13. A vapor lamp comprising a hollow base or tank, a fuelsupply pipe leading therefrom, a bushing mounted on said tank to which said fuel supply pipe is connected, a vertical, longitudinally movable generator pipe having a discharge port at its upper" end and having a sliding connection at its lower end with said bushing arranged to hold said generator pipe against rotation, a stufling box mounted on said bushing, a packing in said stuifing box about the lower end of said generator pipe, an adjusting nut having right and left hand screw threads engaging respectively said generator pipe and said stuffing box and a valve rod' in said generator-pipe connected atitslower end to said bushing and having a valve at its upper end controlling said discharge port, substantially as described.

14. Ina lighting apparatus, the combination with a generating tube having a discharge port at its end and means for cleaning said discharge port comprisinga longitudinally shiftabfle rod within said tube, a small tube arrange'd'within a bore in the end of' saidro'd, a fine wire inserted in said tube and having its inner end hooked about the inner end" of said tube, the tip of said rod being swaged upon the outer end of said tube and the outer end of said tube being swaged on said wire to rigidly and securely connect said parts, substantially as described. 15. In an incandescent lamp, a fuel con, ducting tube, means'for producing'a mixture of air and fuel adapted to be removably supported upon said fuel tube'and communicating therewith and a mantle suspended from said means and surrounding'said tube.

16. In anincandescent lamp, a fuel conducting tube, means for producing a mixture of air and" fuel located at the'upper'end of said fuel conducting tube andconnnunicating therewith and a mantle suspended at the lower end of" saidimixingmeans and sun rounding said fuel tube. j A 17, In a vapor lamp, the combination-of a vertical generator tube having a discharge orifice atits upper end and an inverted mixer removabl'y mounted at the upper end of said generator tube and having a burner at its lower portion encircling said tube and flanges aboutsai'd burner and said tube for engaging the upper and lower ends of a sleeve-like mantle to retainthe same in positionjabout said generator tube-.

18". In a vapor'l'amp, the combination of a vertical generator tube having a discharge orifice at its upper end, aniinverted mixer at the upper portion of saidi generator hav ing aburner at its lower portion. encircling said tube, and an open=ended, inverted mantle having its upperiand lower end portions gathered and tied about said" burner and sfiaid tube respectively to inclosethe inverted 'ame.

15 inunicating at one end with said fuel supply pipe and having a discharge port at its opposite end, a valve in said genera-tor pipe for controlling sa1d dlscharge port, a valve in the opposite end of said generator pipe.

for controlling the admission of liquid fuel thereto and common means for controlling said valves arranged to successively open said admission and discharge valves and to hold both of said valves closed when the lamp is not in use.

FRED E. DAVIS.

Witnesses:

IRA ULFERs, F. E. Asnuos.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). G.

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