Electric heating – Heating devices – Tool or instrument
Patent
1988-10-24
1990-05-08
Bartis, Anthony
Electric heating
Heating devices
Tool or instrument
219227, 219238, 338 76, 338195, 338227, H05B 102, B23K 304, H01C 104, H01C 300
Patent
active
049240676
ABSTRACT:
An accurate, setting-protected, temperature controlled soldering iron has a control circuit including a non-adjustable replaceable resistor mounted near the junction of the handle and the tube which holds the soldering tip. When it is desired to change the temperature of the soldering tip, the handle must be disassembled from the tube to replace the non-adjustable resistor. Very accurate control of temperature at the soldering tip is maintained by the utilization of different laser trimmed resistors having extremely accurate resistances. A window is provided in the soldering handle to observe a number associated with the value of the non-adjustable replaceable resistor.
REFERENCES:
patent: 3004234 (1961-10-01), Ponsy
patent: 3048805 (1962-08-01), Bermi
patent: 3448427 (1969-06-01), Baskett
patent: 3504132 (1970-03-01), Wallace
patent: 3646577 (1972-02-01), Ernst
patent: 3659188 (1972-04-01), Alexander et al.
patent: 3769480 (1973-10-01), Lee
patent: 3883716 (1975-05-01), Fortune
patent: 3908178 (1975-09-01), Johnson et al.
patent: 4306217 (1981-12-01), Solow
Bartis Anthony
Cooper Industries Inc.
Heim Michael F.
Thiele Alan R.
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