CA1316368C - Molten metal sampler - Google Patents
Molten metal samplerInfo
- Publication number
- CA1316368C CA1316368C CA000614297A CA614297A CA1316368C CA 1316368 C CA1316368 C CA 1316368C CA 000614297 A CA000614297 A CA 000614297A CA 614297 A CA614297 A CA 614297A CA 1316368 C CA1316368 C CA 1316368C
- Authority
- CA
- Canada
- Prior art keywords
- tube
- molten metal
- pouch
- pod
- measurement device
- 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 - Fee Related
Links
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
Abstract of the Disclosure A molten metal sampler includes an insulative pod which is joined to a paperboard sleeve which is connected to the metal handle. The pod is molded from a refractory composition and surrounds the tube and has an integral pocket to support any of a wide variety of sample molds or form a sample within itself adjacent to the tube. The cardboard tube can carry a heat sensor or oxygen sensor. The pod can contain a separate measuring device which can measure the cooling curve of the sample in the pod.
Description
13 1 G3()'3 ,~ 1 MOL~N METAL ~AMPLER
Background of the Invention The invention reIates to molten metal sam-pling apparatus. My U.S. Patent No. 4,069,715 issued ~anuary 24, 1978 shows a piggyback arrangement for joining two cardboard instrument carrying sleeves with refractory cement and staples or the like in side by side relationship to enable immersion in molten metal of the two side by side tubes to simultaneously obtain a metal sample and a bath temperature. This affords the opportunity of obtaining a bath temperature mea-surement with the thermocouple and also retrieving a sample of molten metal from the bath from a point ad-jacent to the sensor of the thermocouple with two in-dependent pieces of equipment integrated together us-ing one immersion tube. It is known to use combina-tion samplers and thermocouples. These samplers are limited somewhat to the sample shapes and sizes of samples which can be confined and arranged in a work-able fashion in one housing.
Although the apparatus disclosed in U.S.
~Patent 4~069,715 was effective to accomplish the in-tended results it was never commercialized because ~ there was no major cost saving as compared to using `~` 25 separate thermocouple tubes and separate ~ampling , .... ., , :
:
.
Background of the Invention The invention reIates to molten metal sam-pling apparatus. My U.S. Patent No. 4,069,715 issued ~anuary 24, 1978 shows a piggyback arrangement for joining two cardboard instrument carrying sleeves with refractory cement and staples or the like in side by side relationship to enable immersion in molten metal of the two side by side tubes to simultaneously obtain a metal sample and a bath temperature. This affords the opportunity of obtaining a bath temperature mea-surement with the thermocouple and also retrieving a sample of molten metal from the bath from a point ad-jacent to the sensor of the thermocouple with two in-dependent pieces of equipment integrated together us-ing one immersion tube. It is known to use combina-tion samplers and thermocouples. These samplers are limited somewhat to the sample shapes and sizes of samples which can be confined and arranged in a work-able fashion in one housing.
Although the apparatus disclosed in U.S.
~Patent 4~069,715 was effective to accomplish the in-tended results it was never commercialized because ~ there was no major cost saving as compared to using `~` 25 separate thermocouple tubes and separate ~ampling , .... ., , :
:
.
- 2 - 131~
lances containlng sample retrievlng equipment, These piggyback samplers also had a large mas~ and dlsplaced a large quantity of molten metal and werP inconvenient to USQ and there waæ no qulck sample release. They were not non-boiling and a large quantity of paper board waa exposed to the melt and gaslfied causing metal splash.
A large number of samplers presently include a heat sensor or thermocouple as well a~ a mold for molding a sample. Complex and expensive arrangements ars required to lsolate the molten metal from the cold junction of the thermocouple wires and the lead wires.
The cold ~unction must al~o be isolated from the heat of tho metal bath and the internally located hot sam-ple. These samplers are difficult and time consuming to take apart for retrieval of the sample. In vlew of tha fact that a great number of measurements are re-peatedly taken in steel mllls there is a need for low C08t and easy to use sampling equipment because nor-mally the sampler and sensor are consumed and not available for repetltlva use. Accordingly, cost sav-ings, sa~ety and time and speed of operation are major factor~ in the construction of molten metal sampllng equipment.
Summ~y_of the Inventlon The invention provides a structural and lnsulative shell or pod with a pouch for carrying met-al sampling equipment in ad~acent relationship to a tube ~or supportlng an oxygen sensor or thermocouple.
- 30 ~ The pod is more compact and safe to use than the pig-gyback sampler mentioned above and provides an inex-pensive comblnatlon of sampler and sensor with good isolation and insulation for the cold junction of the - heat sensor~
1 31 ~3(~
2a 60~95-1~07 More speciEically, the present invention provides apparatus for measuring properties of molten metal comprising: an elongated tube adapted to be connected to a handle for manipu].ation thereof, a first molten metal measurement device supported by said tube, a second molten metal measurement device, a pod for receiving said second measurement device in embracing contact laterally along side said tube and first molten metal measuring device, and said pod having wall means defining a tube sleeve portion which interfits with said tube to support the pod on said tube, the pod wall means defining a pouch to receive said second measurement device, and means for securing said second molten metal measurement device in said pouch, said pod having common wall means surrounding and forming said pouch and sald tube sleeve portion.
The invention furthermore provides apparatus for measuring properties of molten metal comprising handle means for supporting a thermocouple having a cold junction, an insulative pod adapted to be connected to the handle means for manipulation thereby in a molten metal bath and said pod including wall means defining a common chamber having a curved portion for receiving the handle means and an offset pouch, said pouch being dimensioned to receive and support in offset re:lationship from the handle means and the thermocouple a molten metal sampler having a mold, and insulative means between the thermocouple and the pouch to insulate said cold junction of the thermocouple from heat in the molten metal sampler in the pouch.
The pod is provided with an inside arcuate surface which forms a sleeve slightly larger in : :.
~,,. , ", .
t. ~, ~ , , 3 `- 131 63G"
diameter than the cardboard tubes typically employed for immersion thermocouples or oxygen sensors. The pod snugly receives the outside surface of the tube~
These cardboard tubes typically have an outside diame-ter of around 1~" but can be larger or smaller. At one side of the pod the arcuate walls merge with flat walls which form a channel pocket or pouch which is open at one ènd and open facing the cardboard tube.
The pocket is adapted to receive and support a variety of molten metal samplers in close proximity to the sensor tube. The pod and pouch can be downwardly open or upwardly open with the ~ill tubes for the sampler either projecting upwardly or downwardly depending on the characteristics of the sample being taken. With high temperature molten metal, the sample metal tends to run out o~ the ~ill tube during retrieval of the sample from the bath. The open ends of two pods can face each other in mouth to mouth or allochiral rela-tion to accommodate large sample molds. The pods are easily shaped to provide openings and compartments ~uch as a mixing chamber to mix molten metal with a de-oxidant before it enters the sample mold.
The pod is desirably made from a non-boiling substance such as a refractory fiber, for example, ~abcok and Wilcox's Kaowool (trademark) 2600 bulk fi ber alone or with other ingredients as disclosed therein. The non-boiling characteristics of a pod made in accordance with the compositions disclosed in those patQntS ensures that there is no carbon from combusting paperboard added to the sample retrieved by the molten metal sampler caused by combustion of a cardboard tube. Thus the sampler of the invention is particularly desirable in measuring a low carbon con-tent o~ a melt which could be effected by combustion ; 35 o~ cardboard materials.
, ~ . . I
~ 4 ~ 1 3163,'`
Moreover, the pod protects the cardboard tuba which supports the thermocoupler oxygen sensor and shields it from the molten metal bathO This pro-tects the cold junction of the thermocouple wires and the leads therefor to prevent the generation of a false e-mf which could affect the accuracy of the tem-perature measurement. In addition, the pod protects the molten metal sampler metal mold parts from the melt so they are not melted or covered with molten metal which can interfere with retrieval of the sample from the interior of the mold parts.
The pod is desirably secured in place on the handle by refractory cement at both ends and between the pod walls and the support tube. A staple through the pod and into the cardboard tube can also be em-ployed. The refractory cement also seals the silica sand which is mixed with sodium silica fill which can be employed to pack the sampler in the sampler pouch or pocket.
The cardboard tube can be fitted with a dum-my sensor and dummy connecting plug. The plug can be of the type illustrated in various thermocouple pat-ents including U.S. Patent 3,748,908 issued July 1973 to connect the electric socket to the jack in the tube to hold the pod to the cardboard tube during use.
one or more pods can be connected to a tube.
Also, a heat sensor can be used to measure the cooling curve of a sample in a pod cavity.
Further objects, advantages, and features of the invention will become apparent from the disclosure Description of the Drawings Fig. 1 is a fragmentary sectional view of a sampler in accordance with the invention.
Fig. 2 is a sectional view along line 2-2 of Fig. 1.
~,, ~ 5 ~ 1 31$3~J3 Fig. 3 is a view of a modified embodiment of the sampler.
Fig. 4 is a view of a further modified ~m-bodiment with an evacuated hydrogen sample tube.
Fig~ 5 is a view on reduced scale of an as-sembly of two pods.
Description of a Preferred Embodiment Although the disclosure hereof is detailed and exact to enable those skilled in the art to prac-tice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. The scope of the invention is defined in the claims appended here-to.
Fig. 1 shows a molten metal sampling appara~
tus 10 which includes a paperboard support tube 12 which may be provided with a conventional thermocouple assembly 14 or conventional oxygen sensor 14. In ac-cordance with the invention an insulative pod 13 is attached to the tube 12 by refractory cement 17 and 61. A stapla 19 (Fig. 4) can also be employed. A
molten metal sampler 16 formed from two metal mold halves 18 is provided with a fused quartz fill tube 20. The metal sampler molds fit in a pouch 11 in the pod 13. The pouch 11 is molded in place at the time of molding the pod and is in offset relation to the curved or arcuate internal pod surfaces which embrace the curved surface of the tube 12.
A thermocouple assembly 14 can be of the type illustrated in my U.S. Patent 4,358,630 or UOS.
Patent 2,999,121 issued September 5, 1961. The oxygen sensor can be in accordance with the disclosure in the Fritter U.S. Patent 3,619,381 issued November 9, 1971.
The thermocouple wires 22 and 15 are con-nected to leads 21, 23 on plug 27 fixed in tube 12 by ~, ,, , `" - 6 - 13~, G3',3 contacts 31, 37 in the socket which form a cold junc-tion 46.
The molds for retrieving a sample of molten metal can be of various convention types. The mold can also be a cavity formed in the pod and lined or unlined with metal or refractory.
To make the pod more compact the cylindrical side wall of the cardboard tube can be shaved or cut to form a flat 32 at a location opposite the sample mold.
Between the metal flat 34 of the sample mold and the cardboard tube flak 32 an insulative lamina is provided which includes a refractory blanket 40 and a layer of aluminum foil 42 and a second sheet of re-fractory blanket 44. This lamina i8 desirably provid-ed to isolate and insulate the molten metal from the cardboard tube to avoid heating the cold junction 46 of the thermocouple which heat could interfere with temperature measurements with the thermocouple heat sensor. The refractory blanket can be made from Kaowool 2600 described above.
The flat 32 aids in positively positioning the flat adjaaent sampler surface 34 in the sampler.
The flat 32 is spaced from the flat 34 to snugly re-ceive and position the sample mold halves 18 when pro-vided with or without the insulating lamina which is not required in all combinations.
A vent hole 33 is desirably employed in the paperboard tube adjacent the pouch to afford venting of air from tne pouch to allow the air to escape to assist in the filling of the mold by the incoming mol-ten metal. The insulation acts as a filter to remove some of the tars which evolve from the sample and which can deposit on the metal pipe or handle 3 whlch is connected to the cardboard tube. Accumulations of `:~
' ' ' ' ' ;' : ~ ~ ' ' ' ' -`;~ "
---` 131 63G'3 deposits on the pipe can interfere with repetitive assembly o~ samplers on the pipe.
Re~ractory cement at 61 and 63 saal the pod to the tube 12 and the samplers in th~ pouch. A sand fill or refractory fiber packing can also be employed to pack small sample molds in the pouch 11.
Fig. 3 shows a sampler with the fill tube 57 extending upwardly to prevent 108s of the metal fill from the sampler 61. Where the metal is hot or of high fluidity, the Fig. 1 arrangement can lose metal when the sampler is retrieved and before the sample cools. In Fig. 1 the fill tube 20 is downwardly open.
Fusible caps 69 and 71 are used to seal the mold cavi-ty when moving the samples through the slag.
In Fig. 4 the pocket is provided with an elongated evacuated hydrogen sampler tube assembly 79 which can be o~ the type disclosed in U.S. Patent 3,967,505 issued July 6, 1976.
Fig. 5 shows an assembly of two pods with the pockets in mouth to mouth relation which can thus accommodate a larger sampler 80. An opening 81 is formed in the relatively soft pod by punching or drilling. Although in the disclosed embodiments the pods are molded from an insulative refractory fiber compositionl other materials could be employed to ob-tain some of the advantages of the invention, includ-ing paper, ceramic, wood, or metal, etc. The pods can be cemented together at the seam 82.
~ v; , . ~
.
.
, ,
lances containlng sample retrievlng equipment, These piggyback samplers also had a large mas~ and dlsplaced a large quantity of molten metal and werP inconvenient to USQ and there waæ no qulck sample release. They were not non-boiling and a large quantity of paper board waa exposed to the melt and gaslfied causing metal splash.
A large number of samplers presently include a heat sensor or thermocouple as well a~ a mold for molding a sample. Complex and expensive arrangements ars required to lsolate the molten metal from the cold junction of the thermocouple wires and the lead wires.
The cold ~unction must al~o be isolated from the heat of tho metal bath and the internally located hot sam-ple. These samplers are difficult and time consuming to take apart for retrieval of the sample. In vlew of tha fact that a great number of measurements are re-peatedly taken in steel mllls there is a need for low C08t and easy to use sampling equipment because nor-mally the sampler and sensor are consumed and not available for repetltlva use. Accordingly, cost sav-ings, sa~ety and time and speed of operation are major factor~ in the construction of molten metal sampllng equipment.
Summ~y_of the Inventlon The invention provides a structural and lnsulative shell or pod with a pouch for carrying met-al sampling equipment in ad~acent relationship to a tube ~or supportlng an oxygen sensor or thermocouple.
- 30 ~ The pod is more compact and safe to use than the pig-gyback sampler mentioned above and provides an inex-pensive comblnatlon of sampler and sensor with good isolation and insulation for the cold junction of the - heat sensor~
1 31 ~3(~
2a 60~95-1~07 More speciEically, the present invention provides apparatus for measuring properties of molten metal comprising: an elongated tube adapted to be connected to a handle for manipu].ation thereof, a first molten metal measurement device supported by said tube, a second molten metal measurement device, a pod for receiving said second measurement device in embracing contact laterally along side said tube and first molten metal measuring device, and said pod having wall means defining a tube sleeve portion which interfits with said tube to support the pod on said tube, the pod wall means defining a pouch to receive said second measurement device, and means for securing said second molten metal measurement device in said pouch, said pod having common wall means surrounding and forming said pouch and sald tube sleeve portion.
The invention furthermore provides apparatus for measuring properties of molten metal comprising handle means for supporting a thermocouple having a cold junction, an insulative pod adapted to be connected to the handle means for manipulation thereby in a molten metal bath and said pod including wall means defining a common chamber having a curved portion for receiving the handle means and an offset pouch, said pouch being dimensioned to receive and support in offset re:lationship from the handle means and the thermocouple a molten metal sampler having a mold, and insulative means between the thermocouple and the pouch to insulate said cold junction of the thermocouple from heat in the molten metal sampler in the pouch.
The pod is provided with an inside arcuate surface which forms a sleeve slightly larger in : :.
~,,. , ", .
t. ~, ~ , , 3 `- 131 63G"
diameter than the cardboard tubes typically employed for immersion thermocouples or oxygen sensors. The pod snugly receives the outside surface of the tube~
These cardboard tubes typically have an outside diame-ter of around 1~" but can be larger or smaller. At one side of the pod the arcuate walls merge with flat walls which form a channel pocket or pouch which is open at one ènd and open facing the cardboard tube.
The pocket is adapted to receive and support a variety of molten metal samplers in close proximity to the sensor tube. The pod and pouch can be downwardly open or upwardly open with the ~ill tubes for the sampler either projecting upwardly or downwardly depending on the characteristics of the sample being taken. With high temperature molten metal, the sample metal tends to run out o~ the ~ill tube during retrieval of the sample from the bath. The open ends of two pods can face each other in mouth to mouth or allochiral rela-tion to accommodate large sample molds. The pods are easily shaped to provide openings and compartments ~uch as a mixing chamber to mix molten metal with a de-oxidant before it enters the sample mold.
The pod is desirably made from a non-boiling substance such as a refractory fiber, for example, ~abcok and Wilcox's Kaowool (trademark) 2600 bulk fi ber alone or with other ingredients as disclosed therein. The non-boiling characteristics of a pod made in accordance with the compositions disclosed in those patQntS ensures that there is no carbon from combusting paperboard added to the sample retrieved by the molten metal sampler caused by combustion of a cardboard tube. Thus the sampler of the invention is particularly desirable in measuring a low carbon con-tent o~ a melt which could be effected by combustion ; 35 o~ cardboard materials.
, ~ . . I
~ 4 ~ 1 3163,'`
Moreover, the pod protects the cardboard tuba which supports the thermocoupler oxygen sensor and shields it from the molten metal bathO This pro-tects the cold junction of the thermocouple wires and the leads therefor to prevent the generation of a false e-mf which could affect the accuracy of the tem-perature measurement. In addition, the pod protects the molten metal sampler metal mold parts from the melt so they are not melted or covered with molten metal which can interfere with retrieval of the sample from the interior of the mold parts.
The pod is desirably secured in place on the handle by refractory cement at both ends and between the pod walls and the support tube. A staple through the pod and into the cardboard tube can also be em-ployed. The refractory cement also seals the silica sand which is mixed with sodium silica fill which can be employed to pack the sampler in the sampler pouch or pocket.
The cardboard tube can be fitted with a dum-my sensor and dummy connecting plug. The plug can be of the type illustrated in various thermocouple pat-ents including U.S. Patent 3,748,908 issued July 1973 to connect the electric socket to the jack in the tube to hold the pod to the cardboard tube during use.
one or more pods can be connected to a tube.
Also, a heat sensor can be used to measure the cooling curve of a sample in a pod cavity.
Further objects, advantages, and features of the invention will become apparent from the disclosure Description of the Drawings Fig. 1 is a fragmentary sectional view of a sampler in accordance with the invention.
Fig. 2 is a sectional view along line 2-2 of Fig. 1.
~,, ~ 5 ~ 1 31$3~J3 Fig. 3 is a view of a modified embodiment of the sampler.
Fig. 4 is a view of a further modified ~m-bodiment with an evacuated hydrogen sample tube.
Fig~ 5 is a view on reduced scale of an as-sembly of two pods.
Description of a Preferred Embodiment Although the disclosure hereof is detailed and exact to enable those skilled in the art to prac-tice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. The scope of the invention is defined in the claims appended here-to.
Fig. 1 shows a molten metal sampling appara~
tus 10 which includes a paperboard support tube 12 which may be provided with a conventional thermocouple assembly 14 or conventional oxygen sensor 14. In ac-cordance with the invention an insulative pod 13 is attached to the tube 12 by refractory cement 17 and 61. A stapla 19 (Fig. 4) can also be employed. A
molten metal sampler 16 formed from two metal mold halves 18 is provided with a fused quartz fill tube 20. The metal sampler molds fit in a pouch 11 in the pod 13. The pouch 11 is molded in place at the time of molding the pod and is in offset relation to the curved or arcuate internal pod surfaces which embrace the curved surface of the tube 12.
A thermocouple assembly 14 can be of the type illustrated in my U.S. Patent 4,358,630 or UOS.
Patent 2,999,121 issued September 5, 1961. The oxygen sensor can be in accordance with the disclosure in the Fritter U.S. Patent 3,619,381 issued November 9, 1971.
The thermocouple wires 22 and 15 are con-nected to leads 21, 23 on plug 27 fixed in tube 12 by ~, ,, , `" - 6 - 13~, G3',3 contacts 31, 37 in the socket which form a cold junc-tion 46.
The molds for retrieving a sample of molten metal can be of various convention types. The mold can also be a cavity formed in the pod and lined or unlined with metal or refractory.
To make the pod more compact the cylindrical side wall of the cardboard tube can be shaved or cut to form a flat 32 at a location opposite the sample mold.
Between the metal flat 34 of the sample mold and the cardboard tube flak 32 an insulative lamina is provided which includes a refractory blanket 40 and a layer of aluminum foil 42 and a second sheet of re-fractory blanket 44. This lamina i8 desirably provid-ed to isolate and insulate the molten metal from the cardboard tube to avoid heating the cold junction 46 of the thermocouple which heat could interfere with temperature measurements with the thermocouple heat sensor. The refractory blanket can be made from Kaowool 2600 described above.
The flat 32 aids in positively positioning the flat adjaaent sampler surface 34 in the sampler.
The flat 32 is spaced from the flat 34 to snugly re-ceive and position the sample mold halves 18 when pro-vided with or without the insulating lamina which is not required in all combinations.
A vent hole 33 is desirably employed in the paperboard tube adjacent the pouch to afford venting of air from tne pouch to allow the air to escape to assist in the filling of the mold by the incoming mol-ten metal. The insulation acts as a filter to remove some of the tars which evolve from the sample and which can deposit on the metal pipe or handle 3 whlch is connected to the cardboard tube. Accumulations of `:~
' ' ' ' ' ;' : ~ ~ ' ' ' ' -`;~ "
---` 131 63G'3 deposits on the pipe can interfere with repetitive assembly o~ samplers on the pipe.
Re~ractory cement at 61 and 63 saal the pod to the tube 12 and the samplers in th~ pouch. A sand fill or refractory fiber packing can also be employed to pack small sample molds in the pouch 11.
Fig. 3 shows a sampler with the fill tube 57 extending upwardly to prevent 108s of the metal fill from the sampler 61. Where the metal is hot or of high fluidity, the Fig. 1 arrangement can lose metal when the sampler is retrieved and before the sample cools. In Fig. 1 the fill tube 20 is downwardly open.
Fusible caps 69 and 71 are used to seal the mold cavi-ty when moving the samples through the slag.
In Fig. 4 the pocket is provided with an elongated evacuated hydrogen sampler tube assembly 79 which can be o~ the type disclosed in U.S. Patent 3,967,505 issued July 6, 1976.
Fig. 5 shows an assembly of two pods with the pockets in mouth to mouth relation which can thus accommodate a larger sampler 80. An opening 81 is formed in the relatively soft pod by punching or drilling. Although in the disclosed embodiments the pods are molded from an insulative refractory fiber compositionl other materials could be employed to ob-tain some of the advantages of the invention, includ-ing paper, ceramic, wood, or metal, etc. The pods can be cemented together at the seam 82.
~ v; , . ~
.
.
, ,
Claims (7)
1. Apparatus for measuring properties of molten metal comprising:
an elongated tube adapted to be connected to a handle for manipulation thereof, a first molten metal measurement device sup-ported by said tube, a second molten metal measurement device, a pod for receiving said second measurement device in embracing contact laterally along side said tube and first molten metal measuring device, and said pod having wall means defining a tube sleeve portion which interfits with said tube to support the pod on said tube, the pod wall means defining a pouch to re-ceive said second measurement device, and means for securing said second molten metal measurement device in said pouch, said pod having common wall means sur-rounding and forming said pouch and said tube sleeve portion.
an elongated tube adapted to be connected to a handle for manipulation thereof, a first molten metal measurement device sup-ported by said tube, a second molten metal measurement device, a pod for receiving said second measurement device in embracing contact laterally along side said tube and first molten metal measuring device, and said pod having wall means defining a tube sleeve portion which interfits with said tube to support the pod on said tube, the pod wall means defining a pouch to re-ceive said second measurement device, and means for securing said second molten metal measurement device in said pouch, said pod having common wall means sur-rounding and forming said pouch and said tube sleeve portion.
2. The apparatus of claim 1 wherein said tube sleeve portion is open to said pouch to form a common chamber.
3. The apparatus of claim 2 wherein said tube is provided with a flat adjacent said pouch to positively position an adjacent flat of the second molten metal measurement device.
4. Apparatus of claim 1 wherein said wall means has a curved inside surface complementary to the surface of said tube with the curved surface merging with flat surfaces which form a generally rectangular channel for receiving the second molten metal measure-ment device.
5. The apparatus of claim 1 wherein the tube defines a vent hole for connecting the interior of the tube with the pouch to thereby allow air to escape from the pouch to the tube interior during use.
6. Apparatus for measuring properties of molten metal comprising handle means for supporting a thermocouple having a cold junction, an insulative pod adapted to be connected to the handle means for manip-ulation thereby in a molten metal bath and said pod including wall means defining a common chamber having a curved portion for receiving the handle means and an offset pouch, said pouch being dimensioned to receive and support in offset relationship from the handle means and the thermocouple a molten metal sampler hav-ing a mold, and insulative means between the thermo-couple and the pouch to insulate said cold junction of the thermocouple from heat in the molten metal sampler in the pouch.
7. The apparatus of claim 6 wherein said insulative means between the pouch and said cold junc-tion comprises a lamina of refractory fiber and a me-tallic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000614297A CA1316368C (en) | 1989-09-28 | 1989-09-28 | Molten metal sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000614297A CA1316368C (en) | 1989-09-28 | 1989-09-28 | Molten metal sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1316368C true CA1316368C (en) | 1993-04-20 |
Family
ID=4140774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000614297A Expired - Fee Related CA1316368C (en) | 1989-09-28 | 1989-09-28 | Molten metal sampler |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1316368C (en) |
-
1989
- 1989-09-28 CA CA000614297A patent/CA1316368C/en not_active Expired - Fee Related
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| MKLA | Lapsed |