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US 4,574,172 AGranted
Brazing wand with fiber optic temperature sensor
AssigneeWestinghouse Electric Corp.
InventorsRobert D. Burack, Rudolph W. Brachold
Life of this patent
Estimating the term…
Abstract
The brazing wand comprises a hollow helically wound electrically conductive tubular member for conducting an electrical current and for conducting a coolant therethrough. The electrical current is used to heat a member to be brazed while the coolant is used to control the temperature of the brazing wand. The brazing wand also comprises an optical sensing device for determining and controlling the brazing temperature.
Claims11
Internal heating apparatus for use in steam generator heat exchange tubes, comprising:
- an electrically insulating protective member capable of being disposed in a steam generator heat exchange tube;
- a hollow electrically conductive tubular member capable of conducting a fluid therethrough and disposed in said protective member, said tubular member having a substantially straight leg and having a portion thereof helically wound around a portion of said straight leg forming an induction coil for heating said tube;
- a single strand quartz fiber optic cable disposed within said coil for detecting the temperature of said tube
- a two color pyrometer connected to said fiber optic cable for determining the temperature of said tube;
- and
- a power supply electrically connected to said tubular member for supplying an electrical current to said tubular member.
3 more elements
Dependencies are inferred from the claim text.