The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1992
Filed:
Jan. 11, 1991
Bruce D Bottorff, Shelbyville, IN (US);
Robert A Longstreet, Manilla, IN (US);
Marland J Ratekin, Rushville, IN (US);
Wellman Thermal Systems Corporation, Shelbyville, IN (US);
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.