 Aircraft battery |
| The foregoing and other objects of the invention are accomplished by a lead-acid aircraft battery ... |
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| Magnetic recording medium |
| OF THE PREFERRED EMBODIMENTS The binder to be employed in the magnetic recording medium according ... |
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| Piezoelectric buzzer |
| Accordingly, it is an object of the present invention to provide a piezoelectric buzzer requiring ... |
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| Electrical connector for a microphone |
| An object, therefore, of the invention is to provide a new and improved electrical connector for ... |
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| Electrical connector having LED device |
| Accordingly, an objective of the present invention is to provide an electrical connector for input/... |
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| Connector with checking device |
| The objective of the present invention is to provide an electrical connector with a checking means ... |
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| Electrical connector with sensing terminal system |
| An object, therefore, of the invention is to provide a new and improved sensing terminal system for ... |
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| Electronic scale including a fault-detecting electronic display module |
| In accordance with the teachings of the present invention, an electronic scale including a fault-... |
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| Lock detecting structure of connector |
| With these problems in mind therefore, it is the object of the present invention to provide a lock ... |
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| Contact structure and production method thereof and probe contact assembly using same |
| Therefore, it is an object of the present invention to provide a contact structure having a large ... |
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Elongate composite article
| Details |
Inventors: Nieman, John R.;
Assignee: Caterpillar Tractor Co. (Peoria, IL)
Primary Examiner: Hunt; Brooks H.
Assistant Examiner:
Attorney, Agent or Firm: Grant; John W.
An elongate composite article for treating molten iron has a sintered metal tubular sheath enclosing a core of particulate treating agent. |
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DETAILED DESCRIPTION Referring to the drawing, an elongate composite article 10 has a core of particulate treating agent 11 and a tubular sheath 12 enclosing the core.
The sheath is formulated from a sintered ferrous metal which preferably contains iron, carbon particles in the form of graphite and can contain at least one element selected from the group consisting of silicon and phosphorous for promoting rapid dissolution of the sintered metal at a preselected temperature which is about the normal pour temperature of the molten metal being treated.
Preferably the composition of the sintered metal sheath is formulated to substantially match the composition of cast iron.
For example the carbon content can be selected from the range of about 3 to 4.
75% while the silicon content can be selected from the range of about 1.
8 to 3.
0% and the phosphorous about 0.
5%.
The balance of the sintered metal is iron.
The iron, carbon, silicon and/or phosphorous are preferably provided in amounts sufficient for establishing the melting point of the sintered metal at a preselected temperature which is lower than the melting point of low carbon, mild steel, for example an SAE 1008 or 1010 steel, which melts at about 1545.
degree.
C.
The preselected temperature is preferable at about the normal pour temperature of molten iron which ranges from about 1315.
degree.
C.
to about 1450.
degree.
C.
In one example article, the sintered metal sheath contains about 4.
5% carbon, about 2.
8% silicon, about 0.
5% phosphorous, and the balance being iron.
The melting point of a sintered metal having this composition is about 1290.
degree.
C.
The term "treating agent" as used herein includes the elements, compounds, alloys, etc.
which actually alter the molten metal together with any trace elements, carriers or binders which may be present in or added to commercial treating materials.
The type of treating agent in the article 10 is dependent upon the base molten metal to be treated and the desired metallurgical characteristics of the resultant product
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Fuel Cells 
