US1421158A - Starting lamp for internal-combustion engines - Google Patents

Description

N H. BROOKS. STARTING LAMP FOR INTERNAL COMBUSTION ENGINES.

' APPLICATION FILED JULY 14, 1920.

11,421, 158. Patented June 27,1922.

ATT'y. 7

HERBERT BROOKS, OF IPSWICH, I-EIbTGIirAJVD, ASSIGNOR T PETT ERS LIMITEDQOF YEO'VITL SOMERSET, ENGLAND.

STARTING LAMP FQB rnrnrtNAL-ooMBUsrron ENGINES.

Application filed July 14, 1920. serial No. 396,222.

Y T 0 all whom it may concern:

Be it known that I, HERBERT BROOKS, of Locknager, Aneaster Road, Ipswich, in the county of Suffolk, England, a subject of the King of Great Britain and Ireland, have invented certain new and useful Improvements in Starting Lamps for Internal-Combustion Engines, of which the following is a specification.

This invention relates-to improvements in liquid fuel burners of the type in which the fuel is atomized by a gaseous medium'under pressure, and particularly to burners forapplying heat to internal combustion engines of the kind in which, for the purpose of starting, an external tube or part of the combustion chamber is heated by an external source of heat to obtain the necessary temperature for vaporization and ignition of the fuel admitted into the combustion chamber,

and has for its object to provide an improved burner of the aforesaid type which will be suitable for supplying the necessary heat for starting such engines.

The common form of starting lamp used for suchki'nd of internal combustion engines is similar to a plumbers blow lamp, in which air is pumped into a fuel container causing the fuel to rise through a pipe to the burner of the lamp. The burner consists of a coil of pipes or vaporizing plates leading to a line hole or nozzle. The burner is first heated externally, the air is then pumped into the fuel container causing the fuel to rise into the burner where it becomes vaporized and issues through the fuel nozzle where it mixes with the air and when ignited it burns with an intense blue flame.

According to my invention, I provide improved apparatus comprising a liquid fuel burner of particular construction in which air or inert gas under pressure is admitted through one or more holes or grooves, converging at an angle so as to meet the stream of fuel fed thereto under pressure, and break it up into a very fine spray, as it issues from the burner nipple to a nozzle and flame tube of particular construction, where it can be ignited instantly without pre-heating.

The other details of the apparatus will be more particularly described hereinafter.

are illustrated in the PATENT oF lc-E Constructions embodying my invention accompanying drawings, inwhich Fig. 1 shows the complete burner as applied to an engine;

Fig. 2 a sectional arrangement of the burner in detail; and

Figs- 3 and 4}, cross sections through Fig. 2 showing series of holes in flame tube.

Referring to Figs. 1 and 2, when the burner is in use the flame impinges on the tube A and part of the combustion chamber B, thereby applying the heat necessary for starting the engine; the burner being secured to a part of the engine by thebracket C.

For operating the lamp, compressedair kor inert gas is stored in a receiver and after passing through a suitable regulating valve enters the 'burner'through the pipe D. The burner is connected to the liquid fuel container (not shown) by the pipe E. Air or inert gas under pressure is admitted to the fuel container and forces the fuel through the pipe E to the burner body F. The fuel passes through the hole G to the hole H in the burner body, and to nipple I attached to. or formed as a part of the burner body F.

The air or inert gas enters the burner body through the hole J and thence passes to a chamber K surrounding the burner nipple I formed between the nozzle L and the burner body F. The nozzle L is arranged to seat tightly on the nipple, so that the air or inert gas cannot escape past the seat into the nozzle.

From the chamber K the air or inert gas passes through the converging hole or holes M and impinges on the jet of fuel passing throughthe inner hole H. The atomized fuel then issues from the nipple and passes through the conical hole N in the nozzle L to the flame tube in the form of a very fine spray. This flame tube is of varying diameter, so shaped that, the issuing mixture of the air and atomized fuel passes first through a bulb shaped opening Q then through a neck R of contracted diameter which enlarges more or less suddenly to a larger diameter, the tube P ending in a cone of gradually reducing diameter.

The flame tube is provided with a system of holes The first set of holes S shown in Fig. 3 is located in the bulb shaped opening Q near the nozzle L with the holes directed in the direction of the issuing fuel and air in such a manner that the velocity of the issuing mixture together with the shape of the flame tube causes an induced draught of air to enter through these holes into the flame tube where it mixes with the fuel and air passing through the contracted neck.

The second set of holes T shown in Fig. 4: occurs immediately beyond the reduced neck where the fuel and air pass out fro1'nth e reduced neck into the enlarged part of the flame tube. The velocity at this part being greatly reduced, a small portion of the mixture is enabled to pass back through the second system of holes, and being ignited it tends to heat the flame tube in the neighbourhood of the reduced neck, thereby assisting vaporization of the fuel and enabling the lamp to be operated at a very low pressure with the minimum supply of compressed air or inert gas.

Thirdly, holes U are drilled in the coni cal end of the flame tube P to serve the same purpose as the holes usually provided in the flame tube of the ordinary type lamp, namely to keep the flame constant when the lamp has once been lighted. This lamp re quires no pro-heating, and can be operated with a wide range of light or heavy fuels.

What I claim and desire to secure by Letters Patent is 1. A burner for liquid fuel under pres sure, comprising a burner body having a straight central passage therein for the liquid fuel, a nipple secured to the burner body and having a straight central passage for the liquid fuel co-axial with the fuel passage in the burner body, a nozzle secured to the burner body covering the nipple and formmg a chamber surrounding the same, apressure-fluid supply connected to said chamber,

said nipple having a passage in its side wall in communication with the chamber, said passage converging toward and meeting the fuel passage in said nipple, and a flame tube secured to the front of the nozzle and having a perforated bulb-shaped inner portion converging to a neck and a perforated outer portion diverging from the said neck and again converging to the outlet.

2. A burner for liquid fuel under pressure comprising a burner body, a nipple secured to said body, said nipple having at least one diameter until at the final outlet, the diameter is suitably proportioned to the size of the flame required, the said flame tube being provided with a ring of perforation at the base of the bulb shaped passage, round the tip of the said nozzle. with a second ring of perforation beyond the contracted neck at the edge of the cone. said cone being provided with a plurality of lateral perforas tions at its wider portion.

In testimony whereof I have signed my name to this specification.

HERBERT BROOKS.

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