US922791A

US922791A - Malleable-iron casting and method of making same.

Info

Publication number: US922791A
Application number: US23449804A
Authority: US
Inventors: John J Manning; John W Stephenson
Original assignee: National Malleable Castings Co
Current assignee: National Malleable Castings Co
Priority date: 1904-11-28
Filing date: 1904-11-28
Publication date: 1909-05-25
Anticipated expiration: 1926-05-25

Description

J. J. MANNING & J. W. STEPHENSON.

MALLEABLE IBQN CASTING AND METHOD OF MAKING SAME.

APPLIOATIOH FILED NOV. 28, 1904.

' Patented May 25, 1909.

WITNESSES mvirnares PATEN anion.

JOHN J; MANNING AN D JOHN E W. STEPHENSON, TOLEDO, OHIO, ASSIGNORS TO THE NATIONAL MALLEABLE OASTINGS COMPANY, OF CLEVELAND, OHIO, A CORPOPA- TION or OHIO,

MALIJEABLE-IRON CASTING AND METHOD OF MAKING SAME.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed November 28, 1904. Serial No. 234,498,

To all whom-it may concern:

Be it known that we, JOHNJ. iVlANNING and JonN W. STEPHENSON, both of Toledo, Lucas county, Ohio, have invented a new and useful Malleable-Iron. Casting and Method of Making the Same, of which the following is a full, clear, and exact description, reference being had to the accompanying draw; ings, forming part of this specification, in Which Figure 1 is aside elevation partly in secif it be applied in a separate piece it compli-' cat'es the manufacture and makes thefbox unduly expensive, and if it be attempted to apply-it by uniting it to the box in the operat1on of casting, it is objectionable because the subsequent annealing operation which is required to convert the material of the box from ordinary gray iron to malleable cast iron will destroy the temper of the inserted steel piece and will thus'render it compara-' tively useless. We have discovered means by which these difiicultiescan be overcome, and the j ournal-box provided with a durable Wearing face which will enable it to outlast the ordinary malleable box anddoesmot entail any objectionable features in thcway of expense or difliculty of manufacture.

' To this end our invention consists in inserting inthe box during the operation of casting at the places where the wearis to bere'sisted, a piece of cast iron of such composition that it will resist the annealingprocess and will not be converted thereby into malleable iron.

The 'annealin process therefore converts only the main ho 'iron giving to it the desired ualities of strength and toughness, while t e inserted piece of cast iron retains its original properties of hardness and resistance to wear, and

being an integral part of the boxit does not substantially increase the expense, nor renof malleable cast iron so as to dy of the box into malleable scribed.

der the box obj ectionableby reason of multiplying the parts. The composition which we prefer to'use for the inserted cast iron piece is cast iron containing more manganese than is contained in cast iron from which malleable boxes are made. We can make such composition conveniently by adding to the ordinary mlxturewhich is employed for a {g u making the cast malleable boxes sufliclent manganese to make the total manganese 1n the iron from 2 to 4 per cent, and we cast the resistance iecc from material of this composition, w rich we find is not substantially altered by the annealing process. A greater percentage of manganese may be employed. I

In the drawings, 2 represents a journalbox of malleable cast iron havin lateral guiding

grooves

3, 3 for the pedestals of the truck. In casting the box we place in the mold inserts in the nature of channel-

shape pieces

4, ,4 which have been previously cast of the manganese composition above mentioned, and then cast the material'of the box around them. \Ve also may insert a similar piece 5 at the top of the box to constitute a caring surface for theequ alizer of the truck.

We may make these inserted piecescontinuous channels adapted to extend from end to end of the groove with lateral. projections b, t by which they are confined to the box when. the latter is cast around them or as shown at 4, we may make these pieces so that they will extend only partially along the groove, and we may form in them conical-shape holes c, c'in'which the metal of the box will embed itself forming keys by which. the pieces are held in place. Those skilled in the art will be able to devise other ways of shaping the pieces and casting them to the box. f Within the scope of our invention as broadlyrlaimed it may be applied to the facing of coupler knuckles and other articles I give them hard wearing surfaces, since What we clain1'is:-

1. An annealed malleable casting having included therein an insert having a mange" nese content to render the same capable of reslstmg anneahng substant1ally as I de- 2. lhe herein described method Which consistsm including 1n. a cast an insert having a manganese content to render the same capable of resisting annealing, and then annealing the casting with the insert therein, substantially as described.

I 3. An annealed malleable casting having a wear plate insert included therein during the casting operation and having amanganese content to render the same capable of resisting annealing, substantially as described. 2 4. The herein described method, which I consists in placing in a mold an insert having a manganese content to render the same with the insert therein, substantially as described.

In testimony whereof, We have hereunto set our hands, November 22,1904.

JOHN J. MANNING. I JOHN-W. STEPHENSON.

Witnesses:

THOMAS W. BAKEWELL, H. M. CORWIN.