Remotely electronically controlled soldering instrument

Details Remotely electronically controlled soldering instrument Remotely electronically controlled soldering instrument

1985-11-12

1988-03-29

Bartis, Anthony

Electric heating

Heating devices

Tool or instrument

219227, 219229, 219238, 219240, 228 51, H05B 102, H05B 300, B23K 304

Patent

active

047345594

ABSTRACT:
A hand held, electronically controlled soldering instrument in which the electronic control module is placed several feet along the power cord away from the tool utilizes the power cord leads to measure the resistance of the heater element during each inflection point of the AC input power. The resistance magnitude is used to provide a signal which is a function of the temperature of the heater element. This signal, in turn, is used to control the electric current to the heater element. This arrangement thermally isolates the heater element and the sensitive electronic control circuit and also removes the heat generating circuitry from the handle of the soldering tool. The handle is further cooled by minimizing the heat flow from the heater element to the handle and by using conductors in the power cord as heat sinks to remove heat from the base end of the heater element shaft. A skirt-collar element is placed over a major portion of the handle portion as a fastener element between the heater element shaft and the handle; and, because it is annularly spaced from the handle, it provides an especially cooled grip for the hand and fingers of the operator.

REFERENCES:
patent: 3136878 (1964-06-01), Staller
patent: 3883716 (1975-05-01), Fortune
patent: 4055744 (1977-10-01), Fortune
patent: 4074110 (1978-02-01), Slaughter
patent: 4507546 (1985-03-01), Fortune et al.

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