US580344A - Uniting or welding metal - Google Patents

Description

Nrrnn \VILLIAM GRIFFITH, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, OF ONE-HALF TO JAMES ANDREWVS, OF ALLEGHENY, PENNSYLVANIA.

UNITING OR WELDING METAL.

SPECIFICATION forming part Of Letters Patent No. 580,344, dated April 6, 1897. Application filed January 21, 1897. Serial No. 620,140. (No specimens.)

T ail whom it n'my concern: sheets or plates of metal, it being understood Be it known that I, WILLIAM GRIFFITH, a that only mechanical skill is required in citizen of the United States, residing at Pitts adapting the process to other forms or shapes, burg, in the county of Allegheny and State of and although either iron or steel may be weld- 5 5 Pennsylvania-,have invented certain new and ed or plated with copper or an alloy thereof useful Improvements in Uniting or Veldiug or any other metal or alloy of the same I use Metals; and I do hereby declare the following the word steel, the process being the same to be a full, clear, and exact description of the with either of the two metals. invention, such as will enable others skilled The plate of steel is first carefully cleansed 6o 10 in the art to which it appertains to make and from oxid or scale in any preferred manner,

use the same. in this instance by the use of a bath of sul- This invention relates to uniting or welding furic acid in the usual manner of removing metals. such oXid, and it is then ready to receive a The object is to unite copper or alloys therecoating or surface of copper or an alloy thereof 65 of with other metals so as to produce metal or of any other suitable metal or alloy thereof plates and other articles of metal having one capable of being deposited by chemical or elecor both faces of copper or of copper alloyed trical deposition or otherwise. In this inwith other metals. stance the plate of steel is placed in a bath of I'Ieretofore while it has been possible to coat a solution of one of the salts of copper. This 70 or plate iron and steel plates with copper the bath may be formed by dissolving sulfate of two metals have not been practically and succopper in weak sulfuric acid ;-but I donot decessfully united by welding. sire to limit myself to the sulfate of copper or The purpose of this invention is to weld toto the sulfuric acid, as any equivalent salt or gether plates, sheets, bars, or other forms of acid may be substituted therefor. The plate 75 steel or iron and copper or alloys thereof in is allowed to remain in this bath until its sursuch manner as to effect a perfect and intiface or surfaces will be covered with a deposit mate union between the two metals. of copper or an alloy thereof, which is gen- To this end the invention consists in the erally accomplished in from one-half an hour process hereinafter described, in which the to an hour. The plate is then removed from 80 plate, bar, or other article of iron or steel is the bath and a sheet of copper or an alloy first cleansed from scale or oXid;- its surface thereof or of any other suitable metal or an or surfaces then covered with a coating or dealloy thereof of any desired thicknessis placed posit of copper or an alloy of copper or any on a face thereof and is secured thereon in other suitable metal or alloy thereof capable any convenient manner, as by bending the 85 3 5 of being deposited by chemical or electrical edges of the copper or the like over the edges deposition or otherwise, in this instance by the of the plate, or in order to save waste tangs action of a bath of a solution of the salts of may be provided at the corners or at suitable copper; is then placed face to face with a sheet intervals and be bent to embrace the plate. or plate of copper or an alloy thereof or any There the plate is to have both faces of cop- 90 40 other suitable metal or an alloy thereof; is per or the like, two plates of the same are sethen heated to the proper degree, and, finally, cured to the steel plate, one on each side or is passed through rolls or is subjected to presface thereof. The plate of steel, with the copsure requisite to effect the perfect and intiper plate or plates or alloys thereof, is then mate welding of the metals. placed in a suitable furnace and subjected to 5 I will now describe the invention, so that a heat of about 1,7 00", more or less, Fahrenothers skilled in the art to which it appertains heit. After the plates are properly heated may employ the same. they are removed and passed through rolls or The invention may be applied to various other pressure-exerting mechanism, thereby forms or shapes of metal, such as plates, bars, effecting the perfect welding together of the I00 rods, 850.; but for the sake of brevity I will plates.

confine this description to the welding of As above stated, I may, instead of using pure copper, employ alloys of the same, such as Muntzs metal, or brass may be employed in a like manner as the copper, excepting with some alloys a greater or less heat may be required prior to Welding, as will be apparent to those skilled in the art.

It is to be understood that this invention is not to be limited to the mere facing of a sheet or plate of iron orsteel with copperor the like, as I may Weld together two or more sheets or plates of the same or different metals and of the same or different hardness to build up armor-plate, or for sheathing for vessels I may employ iron or steel faced With yellow or ships metal.

Having thus fully described my invention, What I claim as new, and desire to secure by Letters Patent, is

The herein-described process of uniting or welding plates of metal of different kinds, which consists in cleansing one of the plates from scale, oxid, or other impurities, then coating or covering one or more faces of this plate with a metal or an alloy thereof having a lower fusing-point, then applying to this coated surface a plate of metal or an alloy of the same character as the coating, but free from any coating, then applying heat to the two plates, and finally uniting by pressure, substantially as described.

In testimony whereof I have hereunto set my hand.

IVILLIAM GRIFFITH.

WVitnesses:

JAMES K. BAKEWELL, WILLIAM J oHNs.