US402871A

US402871A - Molder s ladle or crucible

Info

Publication number: US402871A
Authority: US
Publication date: 1889-05-07
Anticipated expiration: 1906-05-07

Description

(No Model.)

0. TRUESDALE.

MOLDERS LADLE 0R ORUGIBLE.

Patented May '7, 1889.

FIG.1.

N. PETERSv Phulo-Lilhogmpher, Wa hington DC.

UNITED STATES CHARLES TRUESDALE,

PATENT OEFrcE.

OF CINCINNATI, OHIO.

MOLDERS LADLE OR CRUCIBLE.

SPECIFICATION forming part of Letters Patent No. 402,871, dated May '7", 1889. I

Application filed April 2, 1889. Serial No. 305,664:- (No model.)

To all whom it may concern.-

Be it known that I, CHARLES TRUESDALE, a citizen of the United States, residing at Oincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Molders Ladles or Crucibles; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, which. form a part of this specification.

Molders ladles as ordinarily made are coated internally with a lining of loam or other suitable material, which is applied in a plastic condition, after which act the ladles are dried in an oven for the purpose of evaporating any water or moisture that may be contained in said lining; but the temperature of the oven is insufficient to expel all the moisture, and consequently when the ladle is first filled with molten metal the intense heat of the same causes the lining to giveoff a gas or vapor that can escape only by passing through the metal. This escape of gas causes the metal to boil, as it is technically called by foundry=men, thereby rendering it unfit for use and compelling it to be poured out on the ground, so as to enable the ladle to be filled a second time before its contents can be run into a mold.

To prevent this waste of time, labor, and metal, I slot the sides of the ladle, which simple expedient allows the gas or vapor to escape freely, and thereby prevents the objectionable boiling. The slots are preferably made in a ladle having an inwardlyconverging top, which convergence prevents the lining working up by the contraction of the metal while waiting for the ladle to be refilled. Furthermore, it is preferred to locate an annular groove within the ladle and above said slots, which groove coacts with the converging top in securing the lining in place, as hereinafter more fully described.

In the annexed drawings, Figure 1 is a sectional side elevation of my improved ladle. Fig. 2 is a horizontal section thereof, said section being taken at the line at w of the preceding illustration and the lining being These side slots may be of such size and shape as circumstances suggest, and a sufficient number of them must be provided to allow a free escape of gas from the lining.

E is the upper or unslotted portion of the ladle, which portion converges inwardly at the top and has at the bottom an internal annular groove, F.

G is the loam or other lining of the ladle or crucible, which lining may be applied by hand in the usual way, the water contained in it being evaporated by placing the ladle in an oven; but the temperature of an oven is insufficient to completely evaporate all the moisture from the lining, and therefore when molten metal is poured into the ladle the intense heat of the metal causes a sudden generation of gas and other vapors, which vapors escape freely through the side slots, 0. Consequently there is no boiling of the metal, and on this account it is in a proper condition to be poured directly into the mold or flask. After pouring out the metal and before the ladle is again filled it cools to a certain extent, and the consequent contraction tends to loosen the filling, G, and cause it to work up, which loosening is counteracted by the inwardly-converging top E, that holds said lining in place. This upward shifting of the lining is further guarded against by anchoring it within the annular groove F as seen in Fig. 4. Finally, by giving the ladle A an outward flare or curve from the lower ends of slots 0 up to the marginal rim B the pattern can be readily drawn ofi from the cores that form said slots.

I claim as my invention-- 1. As a new article of manufacture, a molders ladle or crucible having its sides pierced with a series of slots, for the purpose speci fled.

2. A molders ladle or crucible consisting of an upper portion having an inwardly- I11 testilnonywhereof Iaffix my signature in converging top and a lower portion having presence of two witnesses. slotted sides, substantially as herein (1esoribed. CHARLES TRUESDALE. 5 3. A molders ladle or crucible having an internal annular groove, an inwardly-com Vfitnesses: verging top, and slotted sides, substantially JAMES ll. LAYMAN,

as herein described. SAML. S. CARPENTER.