Accession Number : ADD015105

Title :   High Contact Blind Hole Thermocouple Plug.

Descriptive Note : Patent,Filed 28 Mar 90, patented 4 Jun 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Burnett, Donald R

Report Date : 04 Jun 1991

Pagination or Media Count : 4

Abstract : It is useful to be able to place a thermocouple in a plug in a spacecraft heat shield without disturbing the heat flow to the thermocouple. The thermocouple wire is ceramic coated before placement in the plug and a thin metal disc is placed in the bottom of the hole. The thermocouple wire is pressed into the disc to obtain good thermal contact. Blind hole thermocouple plugs in carbon phenolic heat shields have inaccurately measured temperature due to cutting of the heat conductive fibres in the phenolic by the blind hole resulting in decreased heat flow across the hole. It is therefore a primary objective of the present invention to provide a method of forming a blind hole for a thermocouple in a heat shield which does not reduce heat flow to the thermocouple. An important advantage of the present invention is that the thin metal disc provides rapid heat conduction across the hole bottom.

Descriptors :   CARBON, DISKS, FIBERS, HEAT SHIELDS, HEAT TRANSFER, METALS, PHENOLS, SPACECRAFT, THERMAL CONDUCTIVITY, THERMAL PROPERTIES, THERMOCOUPLES, THINNESS, WIRE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE