US2153379A

US2153379A - Device for feeding liquid fuel

Info

Publication number: US2153379A
Application number: US178366A
Authority: US
Inventors: Lucas Paul
Original assignee: Ehrich & Graetz Aktien Ges
Current assignee: Ehrich & Graetz Aktien Ges; Ehrich & Graetz Aktien-Gesellschaft
Priority date: 1936-12-03
Filing date: 1937-12-06
Publication date: 1939-04-04
Anticipated expiration: 1956-04-04

Description

April 4, 1939. P. LUCAS I DEVICE FOR FEEDING LIQUID FUEL Filed Dec. 6, 1937 A IIW e E rill/11L vii/Ill; 44444444 5 hue/71w Pa u I L u c a s {lb/neg Patented Apr. 4, 1939 PATENT OFFICE 2,153,379 DEVICE FOR FEEDING LIQUID FUEL Paul Lucas, Berlin-Friedman, Germany, assignor to Ehrich & Graetz Aktien-Gesellschaft,

Berlin, Germany Application December 6, 1937, Serial No.'178,366

In Germany December 3, 1936 4 Claims.

The present invention relates to a process and a device adapted to continuously feed liquid fuel to the carburettor of stoves, incandescent lamps, cookers and the like by means of a'fuel pump 5 whilst using the exhaust gases as source of power.

It has already been suggested to use for working carburettors of such nature of incandescent lamps a circulating suction and-pressure device which is made to revolve by means of a vanewheel, rigidly connected to it and actuated by the waste heat 'of the lamp, thereby acting upon a piston pump, alternately sucking and pressin said pump being connected to the suction and pressure device by means of a pipe line and caus- 5 ing, in consequence of its movement, the fuel to be fed to the carburettor. In the known arrangement the pump is actuated'by some kind of calor- 10 or hot-air engine and it has .been ascertained that it will not be possible in connection'with to continuous operation to sufficiently cool with each revolution the quantity of air contained in the caloric or hot-air engine, particularly in view of the fact, that the space to be kept cool, is located comparatively closely'to the heating source in consequence of the naturally rather compact arrangement. As a result thereof, the caloric or hot-air engine will develop a sufficient performance only in the initial stages, but rapidly drops in continuous operation, so that it will be im- 50 possible to attain a sufficient pressure. In addition thereto, the known arrangement is rather complicated and, for this reason, expensive in manufacture.

The process embodied in the present invention is distinguished from the known by the fact, that by means of the lifting pressure of the hot exhaust gases of the stove, cooker, lamp and the like, a vane-wheel motor is caused to revolve uniformly, immediately and positively driving a piston pump, which feeds the fuel to the carburettor inuniform quantities and under a pressure which is 'suflicient for working the stove-, cookeror lamp-burner.

The arrangement of the present invention for m the purpose of carrying out the process described in the foregoing, is characterized by the provision of a vane-wheel motor at the upper exit end of the exhaust pipe and by the immediate and positive drive of the vertically working pump piston through the perpendicular axis of the motor by means of crank, connecting rod and bellcrank levers. Universal joints of simple construction can,,in case of emergency, also be used.

Whilst it is necessary to use in the known stoves, lamps and cookers a carburettor pressure of 1 atm., it has been rendered possible by means of the present invention to use a very much lower carburettor pressure of about A to atm., yet attaining, the identical effects as with the usual carburettors in connection with the high 5 pressure of 1 atm.

The technical progress of the process and of the arrangement or device according to the present invention consists in the extraordinary simplicity of the process and of the arrangement, 10 in the use of a most simple motoric .power and in the simple immediate and positive drive of the pump through the medium of thissource of power. In view of the fact, that the source of power available is only small, the arrangement, according to the present invention, has been so designed, that the losses caused by friction, are kept within narrow limits and that the most simple means for the generation of power and transmission thereof, are employed. Further advantageous features of the present invention are represented by the absolute reliability of working and the complete absence of danger of whatever description in case of failure or breakdown, because in such case the stove, lamp or cooker will be automatically extinguished. An unintentional escape of liquid fuel has been rendered quite impossible.

The shutting down-of the device is effected,.in accordance with the present invention, by means of a closing member, regulating an outlet from the carburettor to the container. Furthermore, the mechanical structure of the device according to the present invention is distinguished by a great simplicity, inasmuch as the carburettor, the vaporizing pipe arrangement and all pump parts with driving gear are combined to form a unit or aggregate being self-contained and permitting to be lifted off the container. According to the present invention the vertical vane-wheel spindle is provided with a crank and divided above the latter, so that the vane-wheel with its spindle can be lifted off the lower portion of the spindle and coupled with it merely by placing it upon said lower portion.

In the accompanying drawing a form of per formance of the present invention in application to a heating stove has been illustrated by way of example, in which v Fig. 1 represents the device in longitudinal sec- 5 tion and Fig. 2 a detail of the spindle of the vane-wheel motor.

The fuel container I of the heating stovesupports a plate 2, upon which the fuel pump and 7 may be composed of separate square bars ma-' the carburettor with the vaporizing pipe arrangement is disposed and combined so as to form a self-contained unit or aggregate adapted to be lifted off the container. The pump comprises a suction casing 3 which is inserted in a hole of the plate with a tapering tube pivot 4, being introduced into the container from, above, and a suction pipe 6 with suction basket 1 provided at the lower end of said pipe, in connection with which the suction pipe is inserted in a pipe body 5 of the suction casing. The body 5 forms a seat for the spherically shaped suction valve 3. Within a pipe 3, inserted in the suction casing 3, a piston III has been accommodated with play and is adapted to be displaced in a perpendicular direction. The piston ill forces the fuel, sucked in by the spherical valve, from the pipe 6 through a duct H and via the ball pressure valve I2, the pressure chamber l3, the duct l4, into the carburettor l5, from which the vaporized fuel is fed through the duct or channel l6, nozzle ll, whilst being mixed with air through the mixing pipe l8, l9, into the separate burners along the path characterized by the arrows 20, finally landing in hot tubes 22, consisting of a ceramic material, after having passed through obliquely perforated screens 2|. A portion of the fuel mixture flows, according to arrow 24, into the pipe in a downward direction, feeding at the apertures 26 an auxiliary flame within a heating dish 21, through the heat of which the reinforced well-conducting carburettor pipe 28 will be heated. The chief mixture undergoes combustion at the apertures 23 of the hot tubes. Below the reinforced carburettor pipe 28 will be found the preliminary heating dish 29. A connecting

channel

30, 3| between the carburettor and container is regulated or controlled by means of a regulating or control valve 32, which is closed when the heating stove is working normally,.but will be opened for the purpose of establishing communication between carburettor and containers, if it is desired to extinguish the stove immediately, inasmuch as the fuel within the carburettor under pressure, flows back into the container forthwith. The fume pipe or jacket 33 is provided atthe point, where the hot tubes are located, with an aperture 34, through which the hot pipes 22 radiates heat into the room to be heated. Combustion air enters through apertures 35 distributed uniformly along the lower periphery of the jacket, whilst the hot exhaust gases from the hot pipes rise upwards within the fume pipe 33 and, passing through an annular cross section 36 in a bafile plate 31, are made to strike the vane-wheel 38, thereby causing the latter and its vertical spindle 39 to uniformly revolve. At its lower end the spindle 33 is provided with a bore, which is simply pushed over a pivot 40 of the lower spindle extension 4! or, if necessary, special simple coupling means may be used for that purpose. The spindle 4| has a crank 42, the play of which is transmitted by a guide 43 to a pivot 44 of a bell-crank lever 45 driving, by means of a connecting rod 46, the pump piston It. The lower portion of the spindle 4| is accommodated within an axle 41 with a certain amount of play and rests with a tapering end upon a shaft-step or stone 43. Fuel that may have been carried along by the upward movement of the piston is trapped in the annular space 49 and made to flow back into the container via a piping 60. .The bell-crank lever 45 is pivoted to an arm 51 flxed to the pump casing. The pump casing chined or automatic lathes which, by way of example, may be soldered together.

In a similar manner, an incandescent lamp or a cooker can be designed according to the process embodied in the present invention.

What I claim is:

1. Device for continuously feeding liquid fuel to the vaporizer of stoves, incandescent lamps, cookers and the like, comprising a fuel container, a vaporizer, a nozzle, a mixing pipe, a burner, a flue for the exhaust gases from the burner, a fuel pump including a cylinder and a piston movable therein, a vane-wheel motor at the upper end of the flue rotatable by the lifting pressure of the hot exhaust gases, a vertical spindle for the vane-wheel motor, means for positively coupling said vertical spindle of the vane-wheel motor to said movable piston, and connecting conduits between the fuel container and the vaporizer.

2. Device for continuously feeding liqued fuel to the vaporizer of stoves, incandescent lamps, cookers and the like, comprising a fuel container,

, a vaporizer, a'nozzle, a mixing pipe, a burner, a

flue for the exhaust gases from the burner, a liquid fuel pump in the shape of a piston pump, including a cylinder and a movable piston therein, a vane-wheel motor at the upper end of the flue rotatable by the lifting pressure of the hot exhaust gases, a vertical spindle for the vanewheel motor, means for positively coupling said vertical spindle of the vane-wheel motor to said movable piston, said means consisting of a crank, a connecting rod and a bell crank lever, and connecting conduits between the fuel container and the vaporizer.

3. Device for continuously feeding liquid fuel to the vaporizer of stoves, incandescent lamps, cookers and the like, comprising a fuel container, a vaporizer, a nozzle, a mixing pipe, a burner, a flue from the exhaust gases from the burner, a liquid fuel pump comprising a cylinder and a piston reciprocable therein, a vane-wheel motor at the upper end of the flue rotatable uniformly by the lifting pressure of the hot exhaust gases, a vertical spindle for said vane-wheel motor, means for coupling said vertical spindle to said piston, including a crank, a connecting rod and a bell crank lever, connecting pipes between the fuel container and the vaporizer, a cut-off member controlling the connection leading from the vaporizer of the apparatus to the fuel container, a base plate connecting the vaporizer, the mixing pipe arrangement and all the pump members to form a self-contained unit adapted to be lifted off the fuel container.

4. Device for continuously feeding liquid fuel to the vaporizer of stoves, incandescent lamps, cookers and the like, comprising a fuel container, a vaporizer, a nozzle, a mixing pipe, a burner, a flue from the exhaust gases from the burner, a liquid fuel pump including a cylinder and a piston movable therein, a vane-wheel motor at the upper end of the flue which is made to rotate by the vertical lift of the hot' exhaust gases, a vertical spindle for the vane-wheel motor, said spindle being formed of a plurality of parts to permit the upper end connected to the vanewheel motor to lift, when the vane-wheel is lifted, ofl the lower part of the spindle, and means for positively coupling said vertical spindle of the vane-wheel motor to said movable piston.

PAUL LUCAS.