USRE4684E - Improvement xn copper alloys for plow mold-boards - Google Patents

Description

UNITED STATES States, numbered 119,091, for Improvements in Alloys for the Manufacture of Plow Mold-Boards, were granted to me, WILLIAM MAGEE, of Jamaica, in the county ofQueens and State of New York, on the 19th day of September, 1871, and that the following is a full, clear, and exact description of the same.

My present improvement consists of an alloy that experience has demonstrated is most admirably adapted for the construction of the molds, shares, and such other metallic portions of the plow or cultivator as are brought in di not contact with the soil and practical experirailroad &c. I specified two branches of art to which it is especially adapted; but, of course, there. are many utilized and employed.

I am well aware that mold-boards of plows have been made of alloys, the chief ingredients of which. were zinc, tin, copper, and antimony or alloys in every instance, when used for the purpose stated, have proved impracticable, and which has invariably been due to the fact that zinc was always made the primary ingredient or basis of said compositions, it being used with the other ingredients in such proportions as to leave seventy or eighty parts of-zinc.- The result has 7 n, and practical experience has time and again demonstrated the fact, that the mold-board or share when manufactured out of such compositions, owing-to the vast preponderance of zinc, was so exceedingly brittle as to render it valueless for agricultural pu p fully-be {Specification forming part of Letters Patent Nil-119,091,

WILLIAM MAGEE, or JAMAICA, new YORK.

mrnovtnsnr m norm moi/s ronmw' Mow-Bums, it run when runrbsss.

dated September 19, 1871; reissue No. 4,684, dated December 26, 1871.

Tea whom it may concern.- the smallest possible quantity of zinc, this ingre- Be it known that Letters Patentof the United dient not being used by me as the basis for the same, but simply as an agent whose chemical action on the other metals is such as to prevent their ever becoming oxidated.

must only be so varied to still preserve the great preponderance of copper, this metal never being used in a less proportion than this-sixalloy is as follows: lea o d na y p sa aw las o e suitable vessel is first lntrodhced the copper. When this begins to melt or fuse he zinc is introduced and the mass thoroughly gitated; then the tin is introduced, and the whole subjected to repeated agitation. This is continued until such a degree dinary oil.

The details of the process as herein given are important and should not be disregarded; for if the metals are introduced into the cupola together, owing to the much less heat than copper, the thorough amalgamation of the metals in the manner required to effect the desired result does not ensue.

This composition, consisting of the ingredients named and treatedby a process similar to that described, practicalexperiencehas fully shown is admirably adapted for the purposes stated as mold-boards, shares, &c., when manufactured of said composition have proved by practical experiment to be most durable, ductile, in g snflicient flexibility without being brittle, presenting such a non-adhesive face that the soil does not accumulate or bake thereon; and as regards the journal-boxes or bearings when manufactured of the alloy, in additionto their With 'my invention the composition contains fact that tin melts at a so herein stated, used pensp, as; oniyshqut flfty per-cent.- ofthegiubrieating 011.: now

What I claim as new, and desire to seeureby Letters Patent of the United States,is-

The composition, consisting of the ingredients in such proportions as to secure the positive preponderance of copper, so that thiszmetsb shall thebas edwmausy,

used. with the ordhnny jommab 4 box is then required.

bst nti l y is d cr d, an twil polestatod.

to-this specification before two snbseribingiwitr. nesses.

WILLIAM MAGEE.

Witnesses:

HE Y 5- W A. nmmflomos.

In testimony whereof I have signed my name