Temperature controlled soldering iron having low tip leakage vol

Details Temperature controlled soldering iron having low tip leakage vol Temperature controlled soldering iron having low tip leakage vol

1991-01-11

1992-06-16

Bartis, Anthony

Electric heating

Heating devices

Tool or instrument

219229, 219237, 228 51, H05B 102, H05B 342, B23K 304

Patent

active

051226375

ABSTRACT:
A temperature controlled soldering iron includes an elongated heater assembly with a hollow soldering tip at one end, containing a heating element and a temperature sensing element, which is responsive to the temperature of the tip. The heater assembly includes an outer conductive sheath concentrically disposed around an inner conductive sheath, both of which are attached to a steel bushing. A constantan rod is disposed within the inner sheath and connected to the bushing to form a thermocouple junction therewith. The heating element is connected at one end to the bushing and at the other end to a tubular conductor disposed around and insulated from the constantan wire. A temperature controller surveys the temperature sensed at the thermocouple junction by connection to the constantan wire and the outer sheath. The voltage applied between the tubular conductor and the inner sheath is automatically varied to control the temperature of the heater assembly.

REFERENCES:
patent: 2582481 (1952-01-01), Dvorak et al.
patent: 2717952 (1955-09-01), Dvorak
patent: 2735923 (1956-02-01), Juvinall et al.
patent: 2747074 (1956-05-01), Finch
patent: 2897335 (1959-07-01), Finch
patent: 3654427 (1972-04-01), Schoenwald
patent: 3669306 (1972-10-01), Finch

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