G - Physics – 01 – K
Patent
G - Physics
01
K
340/156
G01K 7/04 (2006.01)
Patent
CA 1280189
APPARATUS FOR MONITORING TEMPERATURES OF IMPLEMENTS DURING BRAZING ABSTRACT OF THE DISCLOSURE 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 workpiece. The apparatus comprises a temperature probe comprising a stiff support rod of predetermined length with extent extending from a base portion to a tip. Thermal insulation means is disposed within the support rod substantially along the lengthwise extent and has 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 and has electrical connector means disposed at the end of the handle opposite the base portion connection. Thermocouple means for generating signals correlative with temperature is disposed at the rod tip and lead means within the first and second passageways electrically couples the electrical connector with the thermocouple means. An alarm unit energizable from a source to have an enabled state is electrically coupled with the temperature probe. The alarm unit has cuing means energized to provide a first perceptible output in the presence of said energized state and a second perceptible output in the absence of the electrical coupling of the probe to the unit. Circuit means are provided responsive to said signals from said thermocouple. Said circuit means has first and second outputs corresponding with said signals representing two predetermined temperatures. Said unit further comprises first audible alarm means responsive to said first output and second audible alarm means responsive to said second output. These two alarm means are audibly distinguishable. Also disclosed is a method for monitoring the temperature of an implement comprising a composite compact having an abrasive particle layer bonded to a support being brazed to a substrate by a brazing filler metal disposed therebetween, Such method comprises using the apparatus disclosed herein.
531418
Company General Electric
Oldham And Wilson
St. Pierre Philippe D.
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