US1466739A - Graphite crucible - Google Patents
Graphite crucible Download PDFInfo
- Publication number
- US1466739A US1466739A US542230A US54223022A US1466739A US 1466739 A US1466739 A US 1466739A US 542230 A US542230 A US 542230A US 54223022 A US54223022 A US 54223022A US 1466739 A US1466739 A US 1466739A
- Authority
- US
- United States
- Prior art keywords
- crucible
- layers
- graphite
- graphite crucible
- side walls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910002804 graphite Inorganic materials 0.000 title description 9
- 239000010439 graphite Substances 0.000 title description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title description 8
- 238000005336 cracking Methods 0.000 description 3
- 235000006716 Broussonetia kazinoki Nutrition 0.000 description 2
- 240000006248 Broussonetia kazinoki Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
Definitions
- Kozo NAKAMURA a sub ject of the Emperor or" Japan, residing at No. 8371 Hikoshima, l-Iikoshima-mura; Toyoura-gun, Yamaguchi Prefecture, Japan, has invented certain new and usefullmprovements in a Graphite Crucible, of which the following is a specification.
- This invention relates to graphite crucibles such as are commonly used in chemical or metallurgical laboratories or crucible furnaces for smelting various metals.
- the side walls of these crucibles were composed of plane layers 01"- particles of graphite extending either in a horizontal, vertical or inclined direction,
- the object of this invention therefore is to provide a new and improved construction of a crucible in which the objectionable cracking and splitting of the side walls thereof is overcome.
- the cracking and splitting of the side walls oithe crucible is eliminated by modifying the structure of a part or the whole of the side wall by "forming the wall of a plurality of juxtaposed ⁇ l shaped layers of graphite.
- A represents the crucible, B'the sidewall thereof and C the plurality of V shaped layers.
- the crucible shown in the drawing is preferably formed by piling up flakes of graphite in an outer mold in plane horizontal layers. The center part of thematerial is then removed substantially; to permit the insertionof an inner mold whichis constructed to be ex pansible and capable of'having great pressure applied horizontally thereto in such a way as to move the sections of the inner moldtowards the outer mold
- the material occupying the space between the outer and inner mold is thus” squeezed between the inner mold whenthe inner mold is expanded and as it can not escape outwards it is finally bent to torm the V shaped layers shown in section at the left hand side in the figure of the drawing. -When the material is thus compressed any air which may be within the layers of the graphite is entirely driven off and a compact mass of v shaped layers is provided along practically the entire side Wall E.
- the side wall of the crucible is constructed as heretofore set forth any small cracks WhlCll might be caused by rapid changes of temperature differences during are prevented from penetrating entirely through the crucible because each oi the layers acts as a protective sheet from cracks extending either from the outside or from the inside of the side walls.
- V shaped layers permit a greater flexibility for expansion and contractionbecause of heat changes as the form of the layers allows for expansion and contraction equally in three directions, whereas the usual form of plane layers can only expand or contract in one direction. 7
- a crucible having the side walls thereof constructed of a plurality of superimposed substantially Vshaped layers of graphite.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
Sept. 4, 1923. 1,466,739 K. NAKAMURA- GRAPHITE CRUCIBLE Filed March 9. 1922 K0 Z0 A/AKAMu/M,
Patented Sept. 4 1%23.
entree stares-[ ENT omen K020 NAKAMURinoF royoonA-eun, JAPAN, assrenon mo nrKos'mMAnUrsUn'o KABUSHIKI KAISHA, on ToYonnA-eUN, YAMAGUCHI, JAPAN, A CORPORATION or JAPAN.
GR PHITE Application filed March 9,
To all whom it may concern:
Be it known that Kozo NAKAMURA, a sub ject of the Emperor or" Japan, residing at No. 8371 Hikoshima, l-Iikoshima-mura; Toyoura-gun, Yamaguchi Prefecture, Japan, has invented certain new and usefullmprovements in a Graphite Crucible, of which the following is a specification.
This invention relates to graphite crucibles such as are commonly used in chemical or metallurgical laboratories or crucible furnaces for smelting various metals. As herea tofore constructed the side walls of these crucibles were composed of plane layers 01"- particles of graphite extending either in a horizontal, vertical or inclined direction,
and the pressure to which the sidewall of these known types of crucibles was sub jected in the operation of manufacturing the same was not very great. While these prior art crucibles are capable otwithstanding high temperatures, they would frequently crack or split when local and non uniform.
contraction or expansion in the side walls thereof was caused in discharging of the melted metal or in the charging of new charges into the crucible. This cracking or splitting occurs parallel to the plane layers of the side walls after the repeated working of the crucible and this is a great defect of the prior art constructions even though they have the property of ordinarily resisting high temperature The object of this invention therefore is to providea new and improved construction of a crucible in which the objectionable cracking and splitting of the side walls thereof is overcome. p Y
In the accompanying drawing is shown a crucible constructed in accordance with my invention and in the figure oi the drawing the ri ht hand side of the crucible is shown in elevation, while the left hand side is shown in section.
According to my invention the cracking and splitting of the side walls oithe crucible is eliminated by modifying the structure of a part or the whole of the side wall by "forming the wall of a plurality of juxtaposed \l shaped layers of graphite.
;the use of the crucible- I cauornnn.
1922. Serial No, 542,230.
i Referring to the drawing A represents the crucible, B'the sidewall thereof and C the plurality of V shaped layers. The crucible shown in the drawing is preferably formed by piling up flakes of graphite in an outer mold in plane horizontal layers. The center part of thematerial is then removed substantially; to permit the insertionof an inner mold whichis constructed to be ex pansible and capable of'having great pressure applied horizontally thereto in such a way as to move the sections of the inner moldtowards the outer mold The material occupying the space between the outer and inner mold is thus" squeezed between the inner mold whenthe inner mold is expanded and as it can not escape outwards it is finally bent to torm the V shaped layers shown in section at the left hand side in the figure of the drawing. -When the material is thus compressed any air which may be within the layers of the graphite is entirely driven off and a compact mass of v shaped layers is provided along practically the entire side Wall E.
/Vhenthe side wall of the crucible is constructed as heretofore set forth any small cracks WhlCll might be caused by rapid changes of temperature differences during are prevented from penetrating entirely through the crucible because each oi the layers acts as a protective sheet from cracks extending either from the outside or from the inside of the side walls.
Furthermore, the V shaped layers permit a greater flexibility for expansion and contractionbecause of heat changes as the form of the layers allows for expansion and contraction equally in three directions, whereas the usual form of plane layers can only expand or contract in one direction. 7
.Having thus described my invention what I claim as new and desire to secureby Letv ters Patent is: I 7
A crucible having the side walls thereof constructed of a plurality of superimposed substantially Vshaped layers of graphite.
In testimony whereof ture.
'KOZO NAKALIURA.
he afiixes his sigma.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US542230A US1466739A (en) | 1922-03-09 | 1922-03-09 | Graphite crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US542230A US1466739A (en) | 1922-03-09 | 1922-03-09 | Graphite crucible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1466739A true US1466739A (en) | 1923-09-04 |
Family
ID=24162882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US542230A Expired - Lifetime US1466739A (en) | 1922-03-09 | 1922-03-09 | Graphite crucible |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1466739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2754347A (en) * | 1944-04-28 | 1956-07-10 | Wroughton Donald | Apparatus for refining rare refractory metals |
| US4049373A (en) * | 1975-03-11 | 1977-09-20 | Siemens Aktiengesellschaft | Apparatus for producing compact polycrystalline InP and GaP ingots |
-
1922
- 1922-03-09 US US542230A patent/US1466739A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2754347A (en) * | 1944-04-28 | 1956-07-10 | Wroughton Donald | Apparatus for refining rare refractory metals |
| US4049373A (en) * | 1975-03-11 | 1977-09-20 | Siemens Aktiengesellschaft | Apparatus for producing compact polycrystalline InP and GaP ingots |
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