Electric heating – Heating devices – Tool or instrument
Patent
1995-04-19
1997-11-04
Walberg, Teresa J.
Electric heating
Heating devices
Tool or instrument
228 55, H05B 342
Patent
active
056836031
ABSTRACT:
A soldering tip is disclosed which fits loosely over a ceramic heater rod. The rear skirt of the tip is slotted into segments the rear edges of which are tapered rearwardly inwardly to be engaged by a forwardly opening conical surface on the front of a metallic sheath covering and supporting the rear portion of the ceramic rod. When the soldering tip is urged rearwardly in its assembly to the remainder of the soldering tool the segmented portions of the skirt are then pressed radially inwardly over the ceramic rod. The slots dividing the skirt into segments extend well forwardly thereof whereby the bending of the segments is forwardly of the tip of the ceramic rod where a thermocouple type temperature sensor may be disposed. Thus the skirt portions make good thermal contact with the rear and central portions of the ceramic rod but not with the temperature sensor front tip portion. This causes some significant isolation of the temperature sensor from the heater driven skirt portions and causes it to be more responsive to the instantaneous temperature of the working portion of the soldering tip. This relationship and configuration provides an improvement in the temperature precision and power regulation of the tip portion of the soldering tool.
REFERENCES:
patent: 2689901 (1954-09-01), Obolensky
patent: 2751484 (1956-06-01), Moon
patent: 3744921 (1973-07-01), Weller et al.
patent: 4562838 (1986-01-01), Walker
patent: 5422457 (1995-06-01), Tang et al.
Anderson Daniel T.
Valencia Raphael
Walberg Teresa J.
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