US745799A - Oil-burner. - Google Patents

Description

No. 745,799. PATENTED DEC. 1, 1903.

J R, DONNELLY. OIL BURNER.

APPLICATION FILED APR. 12, 1899.

RENEWED DBO. 24, 1901. NO MODEL.

't vimum I U7 i 09% MUM/a1 TU v tm g g n,

ME I

NITED STATES Patented December 1, 1903.

Prion.

PATENT OIL-BURNER.

SPECIFITCATION forming part of Letters Patent No. 745,799, dated December 1, 1903." Application filed April 12, 1899. Renewed December 24,1901. Serial No. 87,138- (No model.)

.T0 at] whom, it may concern: Be it known that I, JOHN R. DONNELLY, a citizen of the United States of America, and a resident of Fairfield, Somerset county, State of Maine, have invented certain new and usefnl Improvements in Oil-Burners, of which the following is a specification.

My invention relates to vaporizing oil-burners, such as are used for burning liquid hydro carbons, and it is particularly designed for burning kerosene, fuel-oil, and other heavy hydrocarbons rich in carbon without decomposing the oil-vapor and depositing carbon in the vaporizing-chamber.

A further object of the invention is to produce a reducing-flame of suitable form and having a suiiicicntly high degree of heat for brazing purposes and for other similar uses.

These burners consist of a vaporizingchamher, which is generally in the form of a coil, connecting with an oil-supply under pressure, and the vapor generated in the coil is delivered through a vapordischarge nozzle or burner of suitable form, producing a flame from the heat of which the vaporizing-coil becomes sufliciently heated to convert its contents into an unstable gas or vapor. Hitherto these coils or Vaporizers have been so constructed that they were either wholly or partially in contact with the [lame at all times, and the result was that when burning the heavy hydrocarbons a distillation or decomposition of the oil took place within the vapo- -necessary vapor by interposing between the rizing-chamber, depositing carbon, clogging up the needle-valve, and filling up the vaporizing-chamber. Innumerable attempts have thus been made Io burn heavy oils in this type of burners, but none have come into successful and general use.

My invention is founded on the idea of keeping the vaporizer down to a temperature as low as possible consistent with forming the flame and the vaporizer an insulating protecting-covering by which the vaporizer is protected at all points from coming within thesphere of combustion of the flame and so becoming overheated, and I have found from experience that when thecoil is thus kept as cool as possible I not only prevent'carbonization in the coil, but I add greatly to the heat producing qualities of the vapor.

In the accompanying drawings I illustrate :1 burner which is well adapted to carry out my invention, the burner being specially designed for-brazing. and other similar work whereina very hot highly-concentrated reducing-flame is necessary. 1

In the drawings, Figure l is a part-horizontal section through the burner, the casing being shown entirely in section; and Fig. 2 is a vertical elevation and section, showing the burner connected with the oil-tank.

Arepresentsthevaporizing-chamber,which is here shown in the form of a cylindrical coil connecting at one end with the supplypipe I), which leads from the bottom of the oil-tank L. The oil-tank L is a closed tank, and pressure is put on the oil by suitable means, so that it is under pressure when it reaches the coil. The coil connects with a vapor-discharging nozzle or burner D by means of the pipe (2, and this nozzle is shown as being controlled by a suitable needle-valve having the valve-stem g and the handle G.

The coil A forms within itself a cylindrical combustion-chamber, and the nozzle D is so located as to direct a jet of flame longitudinally through saidcombustion-chainber.

For the purpose of preventingthe coil from becoming overheated by the flame I interpose between the flame and the coil an insulating and protecting covering, by which the flame is protected from coming in contact with the coil at any point. In the burner here shown I line the combustion-chamber with a lining or bushing composed of fire-'clay, asbestos, or other suitable refractory material which is a sufiiciently good non-conductor of heat to protect the coil from becoming overheated.

A supply-valve h is rovided in the pipe b for controlling the p. sage of the oil to the vaporizer, and the tank L is provided with a pressure gage z and an air connection j,

through which air may be pumped into the tank. A plug It is inserted in the tank for the purpose of introducing oil into the tank.

When the burner is to be used in exposed places, I inclose it in a suitable casing-IE. This casing keeps the wiud'from blowing out the flame and; coil from becoming too cold. and it admits air to be mixed with the vapor either around the valve-stem, as here shown, or by other suitable openings. 1

operating the burner the coil is first lieot- 9o. ii some eoitab'ic external means, as b .1

the opplicotioii'oi on alcohol flame, and the 'needle-valve is opened, allowing the vapor iniz zetl with air to pose into and through the coinoosiion-ciiamlaer. The flame is forced through the combustion-chamber at a: high re-loony, heating the inner surface of the refractory bushing to on incandescent oiase earl being projecied izzto'tloe oimospherc, forming a tongue of flame beyond a lo bllfiih izigwliicb ie intensely not and is well adap'beo to brazing; heating, eoldering ooppers, $1110 2 other like purposes. The refractory bushing allows snfiicicnt neat to pass through to isiie wi l to keen up the vaporization of one oil, om not cnongh to overheat the oil, and an fine inner surface is at a red heat it regencrilififi onci keeps. up the heel of the Home to time corobneiaiowpoint,

Tiic thickness of the refractory bushing is regoloied to produce just the proper temperotnre in the coil to vaporize without; decomposing the oil. 1 find with aburner time convoirrnciod that I am able to burn kerosene and can be varied from the one here shown by way of iilusirozion Without departing from the spirit of my invention, which consist-s, broadly n in the complete insulation of the vz-zporiza ing-coil from ifne flame, so slim, ii. will l. in an oil-burner, the combination 05 a coil connecieci with a source of oil-supply under preesnre, o lining for said coii composed of refractory and non-heat-conciucting material forming n combustion-chamber and a repor-diocliorge nozzle connected with said ooii end adopted to oiisclmrge vaporinto said combustion-chamber;

In on oiiburner,'the combination of a, coil connected with a source of oil-supply iimler' pressure,,a lining 01- said coil compoeeal of asbestos and forming a combustionchoniiier and a, vapor-discharge. nozzle connested; with said coil and adapted to discharge vapor into said combustion-chamber.

S. in an oilnrner, the combination of a. coil connected with a source of oil-supply under pressure, a liningfor said coil coniposeci of c refractory and i1oi1-heab-c0nducting material forming a. OOmbllStlOllfillFdfibQI' and a burner-head for discharging burning vapor into said combustion-chamber.

Signed by me all Fziirfielri, Maine, this 8th day of March, 1899.

JOHN R. DONNELLY.

Witnesses:

F, E. li'ICFADDEN, 1i. Q. BROWN.

Images