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Shaft and post assemblies for molten metal apparatus

  • US 6,887,425 B2
  • Filed: 09/16/2002
  • Issued: 05/03/2005
  • Est. Priority Date: 11/09/1998
  • Status: Expired due to Term
First Claim
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1. A molten metal pump post comprising:

  • an elongated rod of a heat resistant alloy;

    a sheath member surrounding the elongated rod;

    an indicating device having a terminal disposed in the molten metal bath; and

    an indicating terminal positioned between the rod and the sheath member, the indicating terminal being electrically connected at one end to the indicating device whereby upon penetration of molten metal through the sheath member a circuit closes charging the indicating device.

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