US 972429 A
Description (OCR text may contain errors)
J. 1a. BMRD.
APPLIOATION FILED JULY 6. 1908. 972,429. Patented oct. 11, 1910.
fol-lowlng 'isa speciiication. y
UNITED STATES PATENTLOFFICE.
JAMES B. Benin, or (mirroir, omo.
specificati-tm fLetters Patent. Patentedet. 11, 1910.'
Application-filed .Tu'ly 6, 1908. Serial N 0.441,962.
To it may concern:
Be. itjknoyvn that I, JAMES citizen of the United States, residlng at Ohio, have invented certain new and useful Improvements in Chills, ofvwhich the My present.inventionrelates to that class of devices, used lin foundries, bymeans of' -which the 'surface of a casting is, bycontactwith; av suitably placed piece of metal,
hardened, and Which devices are commonly' These chills are com-A lmon'ly very large and heavy-a considerable mass of metal being necessary toabsorb the heat from the moltengmetal sutiiciently-` to impart the required degree ofhardness" to .the casting being formed.
It` is'l the object of my present invention to reduce this vmass appreciably from that contained in the common form, 'and conse- 'quently save a conslderableportion of' the face of the interior member of-ll` the chill,.-
expense incident thereto.
this channel in contact with theouter surthus carrying awayrapidly a large amount -Referring to.` the'. accompanying draw-A ings, which'are made a part hereof, and on of heat, ner shell Whch is immediately in contact with the molten metal toloeA of`much less Weight than' has been mon practice. ous.features of construction ,which aid materially in the requiredl by .the comtlns invention.
which similar reference characters represent slmllar parts, Figure 1'f1s a-v1ew partially in side elevation and partially in 1on- Agitudinal.vertical section of' a chilli of the character in question embodyingfmy present invention, and Fig. 2a transverse sectional view at tlie line 2 2 in Fi of cylindrical form suita I have illustrated this invention in va chill ble to use in casting rolls, which is a form of casting Where chills are very commonlyT employed. Ihat-l portion 21 of this cliill `which comes in immediatecontact with 'the device .beingcast is, interiorly, in the form shown, a'plain cylinder, and may be called the inner-Wall. On
fits exterior I provide a' number of thin pro- .gections 22 in orderto give a greater radiin the county of Stark and State of This I do by; forming an air channel'in the structure and.l propelling a large volume of air through" and enabling'the lighter and thin I have'also provided varip'e'rfnmancev of' the Work point indicated by the dotted lvention, what I claim as nevv an ating surface. This' inner Wall, or chill proper, is secured Within a larger surrounding cylinder or Wall'in such manner as t0 leave a chamber of considerable size between them. As a convenient means of closing -the ends of this chamber, I provide an outwardly extending ange 2 3 on said inner Wall 2 1, and a corresponding 1n- -wardly extendlng flange 24 on the 'outer the inner cylinder, or chill proper, and thus enabling the air to more efiiciently carry off the heat as it radiates from said chill.
not'only is the weight of the Whole structure mu'ch decreased, thus reducing both the original cost and labor and expense ofhandling the chill, but the expense o''renew'al lVhen the inis also very mlch lessened.
terior surface of thepart 21y becomes roughened by wear,iso that smooth castings can no longer be made with vits use, the said inner portion 21 only needs to be renewed, as
the outer portion 25 will last indefinitely.
It 1s necessary, in order to produce the best results, that the chill shallbe heated to a suitable temperature before the molten vmetal is poured into it.
I am able to do this by the same means that afterward carriesoii' the heat: that iis, I force the heated air through the chamber and thus Warm the chill to the proper temperature; and then Aas soon as the pouring in of the molten metal commences change the air blast from Warm to cold.
Having-thus fully described m said indesire to secure by Letters Patent, is
1. A chill 4comprising an inner and outer wall having a chamber between them,j the outer surface offthe inner Wall and thenner surface of the outer Wellbeing each provided With ,flangesspaced apart from veach other thus' giving lincreased radiating sur-` tace, said ehamber'being providedwith ingress and egress .openings, whereby a 'curber.
rent ofair may be driven through said chamber between the Valls and around said 3. A chill comprising inner and outer walls having'v an annular Chamber between them, an inlet at one end of said chamber, an outlet at the other end ofsaid chamber,the outer surface of the inner wall being provided with iianges, andthe Outer Wall being provided with a spiral flange extending* througi the said chamber'intermediate the inlet and the outlet, whereby an air blast may be given a spiral direction as it passes vthrough.said chamber and the effectiveness thereof thus increased. M
4. A chill comprising inner and outer walls having a chamber between them, with` an inlet at one end of the chamber and an exit at the other, the peripheral surface of said chamber being provided with inwardly extending wings whereby an air current when driven through said. chamber will be deflected toward the outer surtaee' of the inner Wall.
5. A chill comprising inner and outer walls having. a chamber between them, with an inlet at one end of the chamber and an exit] at the other, the outer wall having a spiral partition rib on its inner surface converting said chamber into a spiral passage, the peripheral Surface of said chamber being providedwith inwardly extending Wings whereby an air current when driven through ,said chamber will be deflected toward the JAMES n. Brunn.
JAMES 5'."GRAN'r, HELnND. WAGNER.