USRE7390E - John s - Google Patents
John s Download PDFInfo
- Publication number
- USRE7390E USRE7390E US RE7390 E USRE7390 E US RE7390E
- Authority
- US
- United States
- Prior art keywords
- john
- chiller
- pattern
- sand
- mold
- Prior art date
Links
- 238000000034 method Methods 0.000 description 12
- 238000005266 casting Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- KVFIJIWMDBAGDP-UHFFFAOYSA-N ethylpyrazine Chemical compound CCC1=CN=CC=N1 KVFIJIWMDBAGDP-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
Definitions
- the initial steps taken are similar to those taken in the production of castings, 860., and are as follows: A nowel-board is placed in a proper position to receive upon it what is denominated a chiller, made of metal. Upon this is placed the mold-board or other pattern. Around both the chiller and pattern is then packed moldin g-sand, covering the sides of the same up to the upper surface of such pattern. The molding-sand is sloped downward to the nowel or bottom board. What is denominated parting-sand is then applied to the exposed surface, and the cope applied, which is filled and packed with sand, after which the cope is removed, and the pattern taken oil from the chiller.
- the chiller is then removed, and heated sufficiently to expel all gases or moisture therefrom, after which it is readjusted to its former position in the mold.
- the cope is again replaced, and the molten iron then poured upon the chiller while the latter is yet warm, filling the place formerly occupied by the pattern.
- the further m'anipulat'on of the material constitutes my improved process:
- the flask moved, but is in such a condition as to absorb from the charcoal a portion of the carbon which the latter contains, and in a more perfeet manner than by any process known; and by means of this absorption upon and within this exposed surface I produce the result desired and claimed by meof toughening and. producing substantially a steel surface upon that part of the casting to which the material is applied.
Description
UNITED STATES PATENT OFFICE,
JOHN S. ROBINSON, OF OANANDAIGUA, NEW YORK.
IMPROVEMENT IN PROCESSES 0F HARDENING AND TOUGHENING THE CHILLED SURFACES 0F CAST-IRON.
Specification forming part of Letters PatentNo. 148,849, dated March 24, 1874; reissue No. 7.390, dated November 7, 1876; application filed September 3, 1875.
take of the character, strength, and durability l of steel, of which the following is a specification:
The nature and object of my invention are, primarily, to apply the process herein described to the mold-boards of plows; but the principle involved is susceptible of application to the surfaces of cast-iron of any other form or configuration equally as well, and with beneficial results.
In order to enable others skilled in the art to make, use, and employ this my method and process, I will proceed to describe the same.
The initial steps taken are similar to those taken in the production of castings, 860., and are as follows: A nowel-board is placed in a proper position to receive upon it what is denominated a chiller, made of metal. Upon this is placed the mold-board or other pattern. Around both the chiller and pattern is then packed moldin g-sand, covering the sides of the same up to the upper surface of such pattern. The molding-sand is sloped downward to the nowel or bottom board. What is denominated parting-sand is then applied to the exposed surface, and the cope applied, which is filled and packed with sand, after which the cope is removed, and the pattern taken oil from the chiller. The chiller is then removed, and heated sufficiently to expel all gases or moisture therefrom, after which it is readjusted to its former position in the mold. The cope is again replaced, and the molten iron then poured upon the chiller while the latter is yet warm, filling the place formerly occupied by the pattern.
The further m'anipulat'on of the material constitutes my improved process: The flask moved, but is in such a condition as to absorb from the charcoal a portion of the carbon which the latter contains, and in a more perfeet manner than by any process known; and by means of this absorption upon and within this exposed surface I produce the result desired and claimed by meof toughening and. producing substantially a steel surface upon that part of the casting to which the material is applied.
It is considered that by this process cheapness and facility of construction are obtained to a degree hitherto unemployed and unknown; that the too rapid contraction of the chilled side of the casting is prevented; that the surface is more uniformly toughened and thoroughly carbonized, and thus is the tendency of the casting to become warped or cracked avoided.
What I claim as my invention, and desire to secure by Letters Patent, is
The within-described process for carbonizin g and toughening the surfaces of mold-boards of plows and other castings, it Gonsisting in the application thereto of pulverized charcoal while portions of said castings are yet in an unfit condition to be removed from the molds, owing to the high degree of heat contained therein when the coal is applied, as set forth.
JOHN S. ROBINSON.
Witnesses:
SAMUEL G. METOALF, HIRAM METOALF.
Family
ID=
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