Probe with integrated heater and thermocouple pack

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866501

McCulloch, Reginald W ^[1]; Dial, Ralph E ^[2]; Finnell, Wilber K. R. ^[3]

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1. Oak Ridge, TN
2. Concord, TN
3. Kingston, TN

A probe for measuring heat includes an elongate rod fitted within a sheath, and a plurality of annular recesses are formed on the surface of the rod in a spaced-apart relationship to form annular chambers that are resistant to heat flow. A longitudinal bore extends axially into the rod and within the cylinders defined by the annular chambers, and an integrated heater and thermocouple pack is dimensioned to fit within the bore. In construction, the integrated pack includes a plurality of wires disposed in electrical insulation within a sheath and a heater cable. These wires include one common wire and a plurality of thermocouple wires. The common wire is constructed of one type of conductive material while the thermocouple wires are each constructed of two types of materials so that at least one thermocouple junction is formed therein. All of the wires extend the length of the integrated pack and are connected together at their ends. The thermocouple wires are constructed to form thermocouple junctions proximate to each annular chamber for producing electromotive forces corresponding to the temperature of the rod within the annular chambers relative to outside the chambers. In the preferred embodiment, each thermocouple wire forms two thermocouple junctions, one junction being disposed within an annular chamber and the second junction being disposed outside of, but proximate to, the same annular chamber. In one embodiment two thermocouple wires are configured to double the sensitivity of the probe in one region.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: Delta M Corporation (Oak Ridge, TN)
• Patent Number(s): US 4725399
• OSTI ID: 866501
• Country of Publication: United States
• Language: English

Related Subjects

probe
integrated
heater
thermocouple
pack
measuring
heat
elongate
rod
fitted
sheath
plurality
annular
recesses
formed
surface
spaced-apart
relationship
form
chambers
resistant
flow
longitudinal
bore
extends
axially
cylinders
defined
dimensioned
fit
construction
wires
disposed
electrical
insulation
cable
common
wire
constructed
type
conductive
material
types
materials
junction
therein
extend
length
connected
junctions
proximate
chamber
producing
electromotive
forces
corresponding
temperature
relative
outside
preferred
embodiment
forms
configured
double
sensitivity
region
annular chambers
measuring heat
annular recess
spaced-apart relationship
wires disposed
heat flow
annular chamber
formed therein
conductive material
preferred embodiment
electrical insulation
extends axially
thermocouple wires
thermocouple junctions
wires extend
annular recesses
apart relationship
elongate rod
disposed outside
thermocouple pack
integrated heater
form annular
bore extends
apart relation
rod fitted
spaced-apart relation
thermocouple wire
thermocouple junction
electromotive force
motive force
wire form
/376/136/374/976/