Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-03-09
1988-06-21
Yasich, Daniel M.
Communications: electrical
Condition responsive indicating system
Specific condition
374179, 307310, G01N 2518, G08B 2300
Patent
active
047527706
ABSTRACT:
Disclosed is an apparatus for monitoring the temperature of an implement being brazed to a workpiece. The preferred implement is a polycrystalline diamond composite compact which is brazed to a drill bit or other workpieces. The apparatus comprises an insulated a temperature probe comprising a stiff support rod of predetermined length with a first passageway therethrough. An insulating handle is connected in supporting relationship with the rod and has a second passageway therethrough which communicates with the first passageway. A heat shield is disposed about the handle in the vicinity of its connection with the base portion of the rod. A thermocouple means for generating signals correlative with temperature is disposed at the rod tip and energized from leads extending to an alarm unit. The alarm unit includes a power supply and a circuit which carries out a comparator function for energizing an annunciator when proper braze temperatures commence and further energizing the annunciator function to signal excessive temperature at the braze. A method provides using the apparatus disclosed herein.
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"Thermocouple Input Dial Limit Alarms", Action Instruments Inc., Aug. 1985, Product Brochure-AP1220-AP1224.
General Electric Company
Yasich Daniel M.
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