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Electric heating assembly for a fused bath
| Details |
Inventors: Stevens, John M.; Allen, Grant W.; Cole, John M.; Mousseau, Timothy K.;
Assignee: Kolene Corporation (Detroit, MI)
Primary Examiner: Mayewsky; Volodymyr V.
Assistant Examiner:
Attorney, Agent or Firm: Hogg; William N.
A heating assembly for a fused bath is disclosed. The assembly includes a heating element within a tube. Also, disposed within the tube is a first thermocouple. A second thermocouple is positioned in the bath outside the tube. Control means are connected to the heating elements and thermocouples so that the heating of the bath is performed responsive to the temperature sensed by the second thermocouple; but, if the first thermocouple detects heat in the tube greater than a given value it will interrupt the heating operation to prevent damage to the heating elements due to over-heating. |
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DETAILED DESCRIPTION What is claimed is: 1.
In an electrical heating assembly for heating a fused salt bath in an enclosure wherein electrical heating elements are supported on electrically insulating ceramic spacer means within sealed heat conductive enclosure means, and supplied through leads with power from a power source through electrical insulating means in said enclosure means, and which enclosure means is disposed within the salt bath, and means for mounting said assembly in the bath, the improvement which comprises, first thermocouple disposed within the salt bath, second thermocuple disposed within said enclosure means supported by said spacer means and exposed to the direct radiation from electrical heating elements, and electrical control operatively connected to each of said thermocouples and to said power source through electrical leads, said control means being arranged to control the power supplied to the electrical heating elements responsive to the temperature sensed by said first thermocouple and to remove the power supplied to the electrical heating elements and thereby over-ride the control of said first thermocouple and prevent excessive heating of the electrical heating elements irrespective of the bath temperature responsive to a given temperature sensed by said second thermocouple.
2.
The invention as defined in claim 1 wherein the spacer means includes a plurality of individual spacers each having flanges, said flanges supporting said electrical heating elements.
3.
The invention as defined in claim 2 wherein said flanges including means to support said second thermocouple adjacent said electrical heating elements.
Description:
BACKGROUND OF THE INVENTION This invention relates generally to heating fused salt baths, and more particularly to a method and apparatus for electrically heating a fused salt bath that will prevent damage to the electrical element caused by over-heating.
One conventional device for use in heating fused salt baths is shown and described in U
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