Abstract An apparatus for determining the thermal conductivity of solid propellant samples. The apparatus includes a vessel having a heaVy copper base plate for providing a heat source to one side of a propellant sample. The plate is connected to a thermocouple for measuring it temperature, which should be essentially identical to the temperature of the upper surface of the sample. A copper metering block is in contact with the lower surface of the sample and this block is connected to a second thermocouple for measuring its temperature, which should be essentially identical with the temperature of the lower surface of the sample. A guard block is spaced from and surrounds the metering block to prevent heat loss from the metering block.
Inventors
👤 Edwin L Allen
👤 Donald A Willoughby
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 06:21
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
An apparatus for determining the thermal conductivity of solid propellant samples comprising: a vessel and a metering block engaging opposite sides of a sample for respectively supplying heat thereto and for measuring thermal conductivity therethrough, a block disposed around said metering block and spaced therefrom to prevent heat loss from said metering block, said vessel being connected to a thermocouple for measuring the temperature conducted from said vessel to said sample, said metering block being connected to a second thermocouple for measuring the temperature of said block, said guard block spaced from said metering block by adjusting screws, said guard block having a mass per unit of face area approximately equal to the mass of the metering block per unit of face area, said block having a face parallel to said metering block and in contact with the sample, and said guard block having dimensions and properties chosen relative to the metering block so that heat flow through the sample raises the temperature of the guard block and metering block in equal amounts.
Claim 2
Independent Claim
173 words
An apparatus for determining the thermal conductivity of solid propellant samples comprising: a vessel and a metering block engaging opposite sides of a sample for respectively supplying heat thereto and for measuring thermal conductivity therethrough, a block disposed around said metering block and spaced therefrom to prevent heat loss from said metering block, said vessel being connected to a thermocouple for measuring the temperature conducted from said vessel to said sample, said metering block being connected to a second thermocouple for measuring the temperature of said block, said guard block spaced from said metering block by adjusting screws, said guard block having a mass per unit of face area approximately equal to the mass of the metering block per unit of face area, said block having a face parallel to said metering block and in contact with the sample, and said guard block having dimensions and properties chosen relative to the metering block so that heat flow through the sample raises the temperature of the guard block and metering block in equal amounts.