Browse Prior Art Database

Thermionic Indicator Using Peltier Effect

IP.com Disclosure Number: IPCOM000097287D
Original Publication Date: 1962-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Wdowiak, TJ: AUTHOR

Abstract

Heat transfer time in a low power device is lessened by taking advantage of the Peltier effect. This device is a thermochromic type voltage indicator consisting of two electrical junctions of dissimilar metals A and B. One junction is coated with a thermochromic coating, for example, Ag(2)HgI(4) or Cu(2)HgI(4), or similar material. The other junction is in thermal contact with a heat sink.

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Thermionic Indicator Using Peltier Effect

Heat transfer time in a low power device is lessened by taking advantage of the Peltier effect. This device is a thermochromic type voltage indicator consisting of two electrical junctions of dissimilar metals A and B. One junction is coated with a thermochromic coating, for example, Ag(2)HgI(4) or Cu(2)HgI(4), or similar material. The other junction is in thermal contact with a heat sink.

A switch is provided such that current flow in one direction produces heat in the coated junction and cooling at the heat sink junction. Such causes a thermochromic shift to occur in the coating. Reversing the current flow direction by means of the switch causes the previously heated member to cool by transferring the heat to the heat sink. This results in a rapid reverse change in color of the coating.

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