Temperature controlled soldering iron with a unitary electricall

Details Temperature controlled soldering iron with a unitary electricall Temperature controlled soldering iron with a unitary electricall

1987-01-02

1989-04-18

Bartis, Anthony

Electric heating

Heating devices

Tool or instrument

219229, 219233, 219238, 219240, 219497, 228 51, H05B 102, B23K 302

Patent

active

048229792

ABSTRACT:
A temperature controlled soldering iron wherein the same pair of dissimilar conductors, joined together, unitarily provides a soldering tip, a heating element for heating the soldering tip and a thermocouple for sensing the temperature of the soldering tip. When current is supplied to the conductors, a temperature effect is produced which is in addition to the normal heating of the conductors and results in a corresponding voltage which varies directly with the temperature of the conductors. The voltage is applied to a control circuit where it is amplified, compared against a reference voltage, corresponding to a pre-selected soldering temperature, and the voltage derived from said comparison is applied to regulating the current used for heating the dissimilar conductors. The dissimilar conductors are formed from wires of dissimilar metals and mounted in a generally cylindrical handle by a means which minimizes handle temperatures. One embodiment is particularly adapted for surface mounting electronic components on printed circuit boards.

REFERENCES:
patent: 2747074 (1956-05-01), Finch
patent: 2897335 (1959-07-01), Finch
patent: 3334352 (1967-08-01), Abbondante et al.
patent: 3558854 (1971-01-01), Siegal et al.
patent: 3654427 (1972-04-01), Schoenwald
patent: 3691342 (1972-09-01), Giles et al.
patent: 3699306 (1972-10-01), Finch
patent: 3752017 (1973-08-01), Lloyd et al.
patent: 4546235 (1985-10-01), Kolter

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