US1231716A - Lamp. - Google Patents

Description

F. E. DAVIS.

LAMP. APPLICATION FILED JAN. 19, 1914. RENEWED MAY 19. 1917.

1 31,7160 Patented July 3,1912".

2 SHEETS-SHEET l- F. E. DAVIS.

LAMP. APPLICATION FILED JAN 19. 1914. RENEWED MAY 19. 1911.

Patented July 3, 1917.

2 SHEETSSH EET 2- UNTTED @TATE% PATENT OFFTQE.

FRED E. DAVIS, OF FREEPORT, ILLINOIS, -ASSIGNOR T0 PERFECTION VAPOR LIGHT 00., A CORPORATION OF ILLINOIS.

LAMP.

anemic.

Specification of Letters Patent.

Patented July 3, left.

Application filed January 19, 1914, SerialNo. 813,026. Renewed May 19, 1917. Serial No. 169,777.

To all/whom it may concern:

Be it known that 1, Farm E. DAYIS, 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 Lamps, of which I do declare the following to be a full, clear, and exact description, reference .being had to the accompanying drawings, forming part of this specification.

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

In the drawings, Figure 1 is a side elevation of the lamp wi ah the shade and tank shown in section. Fig. is a plan view of the deflector plate. Fig. 2 is a detail view illustrating two burners which can be substituted for the single burner. Fig. 3 is a sectional view of the gas generator and singleburner. Fig. at is a sectional view of the valve casing and adjacent parts. Fig. is sectional view on the line 5 5 of Fig. -1-. Fig. (3 is a sectional view of the generating cup. Fig. 7 is a sectional view of a tip-cleaning appliance. Fig. 8 is a section on the line 8-8 of Fig. 3.

The improved device comprises a base havingan outer shell 1, an inner shell 2 and a convex bottom 3 havinga downturned flange 3 soldered or otherwise suitably secured to the lower edge of the shell 2 to form a tight joint therewith. The shell 2 and the bottom 3 form an air and liquid tight tank in which the gasolene or kerosene is to be contained. The inner and outer shells l and 2 are preferably dome-shaped, as shown and fit one within the other, and the inner shell may. be made of any cheap material and stamped to form. The outer shell, however, should be well made and nickel plated or otherwise finished to give it a pleasing appearai'ice. These shells when in place are approximately in contact witheach other at the top but their lower edges slope outwardly. that of the outer shell somewhat more than that of the inner,

placed. A hole is formed through the top 1 of both shells and a. tube 5 is rigidly secured to a flange 6 on the inner shell 2. This tube 5 extends down into the tank about half way to the bottom and upwardly a short distance. Its upper end is externally threaded, as shown in Figui, and a valve casing T is screwed onto this threaded portion. An outwardly projecting flangeS on the lower end of the valve casing engages the upper surface of the shell 1 and clamps it in position with the felt strip a clenched between the lower outer edges of the shells, as above described.

A cylindrical chamber 7 is formed in the lower portion of the valve casing 7 and extends upwardly therein a short distance above the inner end of the tube 5 (see Fig. 5). The lower end of a short, upwardly curved pipe 9 is screwed into the side of the valve casing and communicates with the chamber 7 thereof. A cap 10 (see Fig. 5) is threaded upon the upper-end of the pipe 9 and a washer 11 in the cap 10 engages the end of the pipe 9 to prevent leakage. The cap has a portion 12 extending down into the pipe and an upwardly projecting, internally threaded flange 13. The portion 12 has a bore terminating in a restricted port 1a and a valve 15, loosely fitting the bore, is arranged to close this port. A nipple 1G threaded into the flange 13 of the cap has a bore terminating ina restricted port 17 which is smaller than the valve 15. The latter is provided with conical ends that extend within and close the restricted ports 14 and 17.

the level of the liquid reaches the lower end of the pipe 5, so that space is provided in the tank for air under pressure. \Vhen it is desired to supply compressed air to the tank, it is only necessary to unscrew the nipple 16 until its shoulder 20 engages the disk 19 and raises the valve 15 and air can then be forced through the cap and into the tank with a small pump. During the pumping operation, the valve 15 acts as a check valve to prevent back flow "from the tank. After the desired pressure is obtained, the cap is screwed down and the valve 15 is securely held in position and. prevents any leakage through the port 14.

From the upper end of the cylindrical chamber 7 of the valve casing 7 extends a short, vertical channel 22, into the lower portion of which is screwed a small supply pipe or tube 23, that extends down through the pipe 5 and into the tank almost to its bottom. The arrangement of the supply pipe 23 and the filler pipes 5 and 9 avoid the necessity of forming more than one opening in the fuel tank.

The upper end of the channel 22 communicates with a small channel 2% which extends at right angles thereto into the bore of a projecting boss 25. A needle valve 26, threaded throl'lgh the bore of the boss 25, engages a valve seat 27 at the outer end of the channel 21 and controls the flow of liquid fuel therethrough. A small channel 32 extends from the seat of the valve 27 to a cylindrical chamber 33 in the upper portion of the valve casing 7. A pipe 31 having a flange 35 is screwed into the end of the chamber 33 and a washer 36 pressed between the flange 35 and the upper end of the valve casing 7 forms a tight joint between the pipe 3-1 and said casing.

A small shaft or rod 37 extends out wardly through an outwardly extending portion 38 on the casing 7 and the cap 39 having its end filled with packing 10 is screwed on to the extended portion 38 to insure a tight joint, while the outer end of the rod is bent to form a crank arm 41 in order that the rod may be readily turned.

.The inner end of this rod or shaft is threaded into a disk 42 which is preferably hemispherical in shape and engages one side of the cylindrical chamber 33. A pin 43 eecentrically disposed on the flat face of the disk 12 loosely engages a hole in the flatened lower end 44. of a rod 4'5. The lower end of the rod is arranged between the disk 42 and a T-shaped piece 16 which is fixed to the bottom wall of the chamber 33, and maintains the rod in engagement with the crank pin 1-3. The rod 15 is small and somewhat fiexible and its upper end is adjustably threaded into the lower end of a larger filler rod 47. A lock nut 48 is threadedon the rod and engages the lower end of the filler rod 47. The latter fits loosely within the tube 31, and its upper end is tapered and is provided with a bore in which a line tube at) is secured. A fine wire 50 is inserted in the upper end of the tube 4:9 and is held therein by pinching or compressing the end portion of the metal tube 19 to securely grip the wire, as shown in Fig. 7. The upper end of the rod 47 is also compressed to grip and secure the tube in place. In this manner, the fine wire tip cleaner which is formed of tempered steel and has a diameter of about five thousandths' of an inch, is cheaply and securely fastened to the upper end of the rod 17. j v v The upper end of the tube 34: extends above the filler rod and is provided with a tip 51 which is threaded into the tube and extends a short distance above its upper end.

upper end of the tip 51 is bored out to form w a recess for the tip piece 5% and the walls of this recess are preferably undercut to form an inwardly inclined or contracted annular flange 55. The composition tip piece 54: is molded with this recess and is preterably formed by mixing two parts by weight of Portland cement and one part of plaster of Paris with a saturated solution of salt, and filling the tip recess with this mixture. Before the composition sets, the fine wire 50 is extendedthrough it. 'After the composition has hardened, the wire is withdrawn and, in this way, a fine smooth hole or discharge port is cheaply and accurately formed in the tip piece, through which the vaporized fuel is ejected into the mixing passage. In similar all metal tips, it is diflicult and expensive to drill such ports which must have a very small diameter, must be accurately formed and free from burs in order to accurately direct the stream of vapor into the opening of the mixing passage. In the present tip having a composition tip piece molded in place about a fine wire as a core, the fine opening or port is accurately and economically formed. The particular composition set forth very soon sets after being placed in the tip and when the lamp is used, it quickly vitrifies and hardens.

The upper portion of the tip 51 is threaded into a central opening of a disk 56 which is formed at the lower portion of an inverted U-shaped mixing chamber or passage 57. The central portion of this curved passage has an inlet port 58 on its under side surrounded by a flange 59. The port 58 is-in axial alinement with the port 53, so

.62 which are secured thereto.

regulate the amount of air drawn into the mixing passage 57. In the construction shown, an eye 61 is formed at the top of the U-shaped portion 57 by which to hang the lamp, if desired. The ends of the U-shaped passage 57 extend through the disk 56 form ing two outlets for the gas, which in the form shown in Figs. 1 and 3, open into a cup shaped chamber 62. In the form shown the upper end of this chamber is threaded into a depending annular flange 68 on the disk 56. A laterally projecting deflector plate 61 is centrally mounted in the upper end of the chamber 62 and is gripped between a flange 65 thereon and the flange 63. This chamber or burner head 62 surrounds the pipe 31 andits lower contracted end is provided with a burner and is adapted to engage the upper end of a mantle. The burner comprises a perforated disk 66 hav ing a central opening through which the tube 34 extends and which is held in place by a flanged collar 67 secured upon the lower end of the burner head. The collar 67 performs the additional function of retaining the upper end of a mantle 68 indicated by the dotted lines in Fig. 3 and in full lines in Fig. 1, which is gathered and tied above said collar. The mantle is a sleeve, open at both ends, and extends around the tube 34:. Its lower end is gathered and tied within the groove of a collar 69 mounted on the tube or pipe 34:. The collar 69 is adjustably held in place by a set screw 70,

On the pipe 34 below the collar 69 is rigidly secured a generating cup 71. This cup surrounds the pipe 34 and is filled with as bestos 72. In the construction shown, the projecting arms 73 of a shade-holder are fixed to the cup 71. These arms carry a ring 74L that supports a shade 75. Preferably, also the ends of the deflector plate 64: are curved (see Fig. 2) to engage the upper contracted rim of the shade, so that this plate also serves as a shade support.

The mantle 68 may be readily placed in position, by unscrewing the disk 56 from the tip 51, and removing it and the parts 57 and When it is desired to use a double burner, the burner head or chamber 62 and mantle 68 are removed and two tubes 76, carrying burners 77 and bag mantles 78, are screwed into the internally threaded lower ends of the U- shaped mixing passage 57, as shown in Fig. 2-.

Theoperation of the lamp is as follows: First, the cap 10 is removed and gasolene or kerosene, is poured into the tank through the filler pipes 9 and 5 until its level reaches the lower end of the pipe 5, at which point the liquid will back up into said pipes and no more can be poured in. The cap 10 is then repla/cai and the nipple 16 is unscrewed until its shoulder 20 raises the disk 19 and valve 15. A small pump, such as is used for bicycles, is then pressed against the end of the nipple 16 and air is forced into the tank until suflicient pressure is attained. The compressed air in the tank will force the liquid fuel up through the supply pipe 28, and into the generator tube or pipe 31, when the controlling valve 26 is opened. The nipple 16 is then screwed tightly to place so that the valve 15 closes the port 13 and prevents the escape of air or liquid fuel. The asbestos 72 in the generating cup 71 is saturated with alcohol and the latter is ignited to heat the generating tube 341-. The diameter of the filler rod 17 is slightly smaller (preferably about three hundredths of an inch) than the bore of the tube 3 1, so that the liquid passes between the wall of the tube and the rod in a thin film and is readily vaporized when the tube is heated. The fuel is thus forced out in a fine spray or vapor through the small port 53 and up through the inlet port 58 into the passage 57. As the fine stream of vaporized fuel passes into the port, air is drawn in and is thoroughly mixed with it in the U-shaped passage 57 and in the chamber 62. The gas mixture passing from the lower end of the chamber or burner head 62 is ignited and burns in the usual manner to heat the mantle 68 to incandescence. The supply of liquid. fuel is readily regulated by turning the needle valve 26 through the medium of the knob 81. The air supplied to the mixing passage can be regulated to the proper amount by adjusting the short pipe or nipple 60.

If the discharge port 53 is clogged in the improved construction, the fine pin or wire 50 is always in readiness to clean the port, even when the lamp is burning. This is effected by turning the crank all and shaft 37 to reciprocate the connectedrods 1-5 and 17 to force the pin 50 through the port. The connection between the rods 45 and 47 can be adjusted to properly position the tip cleaning pin or wire 50 relatively to the port 53. The burner that heats the mantle and which, in the preferred form, extends around the generating tube 31, also supplies all the heat necessary to vaporize the liquid fuel, and no other burner is required for this purpose after the lamp is started. The generator cup 71 is, of course, only used to give the lamp its initial start.

The deflector plate 6% is arranged below andat right angles to the U-shaped mixing passage or pipe 57 and projects laterally in line with an opening between the sections of mixing pipe, as shown in Fig. 2. It thus deflects the combustion products rising from the burner and prevents them from entering the mixing passage through the inlet port 58 thereof.

liquid fuel used.

WVhile the drawings illustrate the present improvement as embodied in a portable vapor lamp, many features may be employed in other types. Obviously, also, changes may be made in the details set forth without dcpartiilre from the essentials of the invention as defined in the claims.

I claim as my invention 1. In a portable vapor lamp, the combination of a fuel tank forming the lamp base, an upwardly extending generator pipe, a burner support thereon, a coupling member at the lower end of said generatorpipe having a'threaded' connection through the upward central portion of said tank, and an outer finishing shell for said tank, clamped in position between the same and said coupling member.

2. In a vapor lamp, the combination with a generator pipe and burner, of a fuel tank,

a valve casing interposed between said tank and said generator pipe and having an enlarged borecommunicating with said tank and a contracted fuel supply port communieating with said generator pipe, a fuel supply pipe extending upwardly from the lower portion of said tank through the enlarged bore of said valve casing and communicating with'the contracted port thereof, anda valve-controlled filler tube mounted on said valve casing and communicating with the enlarged bore thereof.

3. In a vapor light apparatus, the combination of a straight, vertical generator pipe having a discharge orifice at its upper end, an inverted mixing chamber and burner mounted upon the upper end of said generator pipe, a valve casing to which the lower end of said generator pipe .is connected, a fuel supply pipe connected to said valve casing, a valve having a stem projecting laterally through said valve casing for controlling communication between said fuel supply pipe and said generator pipe, a rod within said generator pipe having a tip cleaning device for said orifice at its upper end, the lower end of said rod extending within and terminating in the upper end of said valve casing above said valve and a stem extending laterally through said valve casing above said valve and operatively connected to said rod, substantially as described.

-l. I11 a vapor lamp, the combination of a fuel supply tank forming the lamp base, a valve casing mounted on said tank, a fuel supply pipe connected to said valve casing and extending downwardly into said tank,

upper portion of said valve casing, a valve having a stem extending laterally through said casing for controlling communication between said fuel supply pipe andsaid generator pipe, and a stem extending laterally through the wall of said casing above said valve and operatively connected at its inner end tothe lower end of said rod, substantially as described.

5. In a vapor lighting. apparatus, the

combination of a vertical. generator pipe having a discharge. port at its upper end, and an lnverted U-shaped mixing chamber mounted upon the upper end of said generator pipe and having at its central portion an inlet port arranged above and in line wlth said discharge port, said mixing chamber havlng means at its lower ends for interchangeably supporting a single annular head about said generator pipe, or two burner heads arranged on opposite sides of the generator pipe and communicating respectively with the depending portions of said U-shaped mixing chamber.

6. Ina vapor lighting apparatus, a vertical generator pipe having a discharge port at its upper end, an inverted, U-shaped mixing chamber mounted upon the upper end. of said generator pipe and having, at its upper central portion, an inlet port arranged above and in line with said discharge port, and a burnerhead secured at its up per end to the lower portion of said mixing chamber and encircling said'generator pipe.

7 In a vapor lighting apparatus, a vertical generator pipe having a discharge port in its upper end, a downwardly extending mixing chamber having an inlet port, above and'in line with said discharge port, a

burner head communicating with said mixing. chamber and. extending downwardly therefrom, and a deflector plate having portions projecting laterally from the lower I portion of said mixing chamber, the ends of said deflector plate being adapted to serve as shade supports, substantially as described.

8. In a vapor lamp, the combination of a generatorpipe, a tiptherefor having a recessin its outer end, and. a composition tip piece molded in place Within said recess and having a fine discharge port formed in the molding operation.

9. In a vapor lamp, the combination of a 5 generator tube, a tip therefor having a bore terminating in a conical end, and said tip having an undercut recess in its outer end, a composition tip piece molded in place in said recess, and a reciprocating rod in said generator tube having a tip cleaning needle adapted to be inserted through said composition tip piece in the molding operation to form a fine discharge port therein.

FRED E. DAVIS,

WVitnesses GEORGE FAnNsWoR'rH FISHER, J. G. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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