US806060A

US806060A - Compound for hardening iron.

Info

Publication number: US806060A
Application number: US25060005A
Authority: US
Inventors: Cornelius A Burns; Cornelius E Raab
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-03-17
Filing date: 1905-03-17
Publication date: 1905-11-28
Anticipated expiration: 1922-11-28

Description

Application filed M1 ch17, 1905. Serial No- 250,600-

To aZZ whom it may concern:

Be it known that we, CORNELIUS A. B NS and CoRNELIUs E. RAAB, citizens of United States of America, residing at burg, in the county of Allegheny and Sta Pennsylvania, have invented certain ne useful Improvements in Compounds for l ardening Iron, of which the following is 2. sp ification. y l;

This invention has relation to a compo, nd for hardening iron, and has for its prind pal object the provision of a novel compoun for hardening cast-iron of the ordinary qu and cast-iron of that character know malleable cast-iron. i We are aware that it has been propose harden cast-iron by sub'ecting the sami to the chemical action 0 certain matelals while the iron is in a heated state; bu; we are unaware of any composition which impart to malleable casting or to malleii cast-iron the degree of hardness which we impart by the means hereinafter described? In carrying our invention into effectvwe prepare a compound composed of the foll wgiven after each: chlorid of so ium, t

. ing materials, preferably in the roportlifins 66 potassium, one part.

a as

parts; saltpeter, three parts; rockal In, three'parts; carbonate of ammonia, t ee parts; salt of tartar, three parts ,yel ow prussiate of potassium, one part; White eyanid of potassium, one part; red prussia of These materialsl'are thoroughly mixed together, and'the iro be tempered is heated to a red heat Tapproximating a cherry red, and the composition, which has been reduced to a powdery form, is sprinkled upon the iron and allowed to remain in contact with the same a sllort time, and the iron is then dipped into consisting o ELIUS E. RAAB, OF PITTSBURG, PENN;

LVANIA.

Patented Nov. 28, 1905.

water, whereupon it will be tempered and given a hardness approximatin to or even exceeding that of hard tool-stee the degree of hardness being dependent upon the length of time to which the iron has been subjected to the action of the compound above described and to the action of the water.

While we have found that the composition given above in the proportions specified gives eminently satisfactory results, we do not wish to be limited to the precise composition as it is set forth above, as certain variations of the materials used and the proportions specified may be made without departing from the spirit of'our invention.

What we claim is .1. A compound for hardening cast-iron consisting of three parts chlorid of sodium, three parts saltpeter, three parts rock-alum, three parts carbonate of ammonia, three parts salt of tartar, one part yellow prussiate of potassium, one part white cyanid of potassium and one part red prussiate of potassium.

2. A com ound for hardening cast-iron i chlorid of sodium, saltpeter, rock-alum, carbonate of ammonia, salt of tartar, yellow prussiate of potassium, cyanid of potassium and red prussiate of potassium.

3. A compound for hardening iron con' taining chlorid of sodium, saltp eter, alum, carbonate of ammonia, salt of tartar, prussiate of potash and cyanid of potassium.

In testimony whereof we aflix our signatures in the presence of two witnesses.

A Witnesses:

H. C. EVERT,

POTTER.