Gas for cutting purposes.

UNITED STATES PATENT OFFICE.

JOHN HARRIs, OF LAKEWOOD, OHIO.

GAS FOR, CUTTING PURPOSEs.

1,275,252. Specification of Letters Patent.

Patented Aug. 3, 1918.

No Drawing.

Application filed June 7, 1917. Serial No. 173,863.

To all whom it may concern. to Dr. Ettore Molinari in volume 2 of his Be it known that I, JoHN HARRIs, a citi Chemist's Year Book for 1916; and the arti Zen of the United States, residing at Lake ficial illuminating gas produces a higher Wood, in the county of Cuyahoga and State flame temperature thanean be secured by of Ohio, have invented a certain new and the use of natural gas and one which, in 60 useful Improvement in Gases for Cutting fact, is substantially the same as that pro Purposes, of which the following is a full, duced by the combustion of hydrogen alone. clear, and exact description. Furthermore, by the addition of this illumi

This invention relates to gases employed nating gas to the hydrogen, a clearly defined with blow pipes or torches for the purpose visible of cutting metals. It is the general object pipe tip,cone will bethe enabling produced operator from

the blow apply to 65 of this invention to produce a gas for this the metal the particular part of the fame purpose which combines in a marked de (the tip of the cone) where the highest

gree economy and efficiency of operation. temperature exists. Furthermore, the pres It has been proposed to employ hydrogen ence of the illuminating gas causes this cone 70 for preheating the metal in cutting with of intense temperature to extend a sufficient oxygen. The objection to the use of hydro distance from the blow pipe tip to enable the gen is that the flame is colorless, making it operator conveniently to apply and position

extremely difficult to bring the flame into the flame with reference to the work. proper relation with the metal. A further Because of its cheapness of production, 75, objection to the use of hydrogen is that, be hydrogen cause of the intensity of combustion, the which I amisfamiliar the most economical gas with the combustion whereof point of application of the flame for cutting will produce the temperatures requisite for purposes extends only a short distance from 25 the blow pipe tip, making it extremely incon cutting purposes. However, because of the venient to operate upon the metal, even dis found objections noted hereinbeforé, it has been regarding the fact that the location of the impracticable to employ it for such purposes. By mixing illuminating gas of proper operating point of this flame is also the character hereinbefore specified with hy

difficult if not impossible to be ascertained. drogen in about the proportions specified, It is the object of my invention to produce a gas which will secure all the advantages the cost of the resultant mixture is not mate 85 which may be derived from the use of hy alone; greater rially moreover, than that of the hydrogen by the use of such mixture, drogen but which jections above noted. will be free from the ob I am enabled to obviate the objections to 35 hydrogen

In the production of such a gas, I add to and important field for alone and thus to open up a large hydrogen 5% to 10% by volume of ordinary its use. . 90 By the employment artificial illuminating gas. This gas as about the proportions specified, I am able to of illuminating gas in stated by Roscoe & Schorlemmer in volume secure the following important advantages 1 (The non-metallic elements) 40 Treatise on Chemistry published by the Mac of their over the use of hydrogen alone: Millan Co.; is generally composed of the fol duction. gas (a) A

The of extreme cheapness of pro 95 hydrogen constituent has lowing gaseous constituents:- hitherto been allowed to go to waste in Hydrogen.-------- 89.44 parts plants wherein oxygen is produced by the electrolytic process. I not only make use of

Saturated hydro such hydrogen, but reduce the cost of gas 00 carbons --------- 16.88 “ over hydrogen by employing therewith Unsaturated hydro ordinary and cheaper illuminating gas. carbons--------- 8.23 “ (b) I am able to produce a flame the 50 Nitrogen --------- 6.21 ' (variable) temperature whereof is substantially as high Oxygen ----------- 0.21 as that of a flame produced from the com 05 bustion of hydrogen alone, and this tempera

Total ----------- 100.00 parts ture is theexcept , the gases highest obtainable with any of acetylene.

The igniting point of the carbon monoxid (d I am able to produce a gas suitable .

55 constituent of this gas is 637° C. according for cutting purposes which requires for its 10