United States Patent
US Patent 6054678: Heater-sensor complex
US 6054678 · granted 2000-04-25
| Patent Number | 6054678 |
|---|---|
| Title | Heater-sensor complex |
| Filed | 1998-03-12 |
| Granted | 2000-04-25 |
| Inventor(s) | Mitsuhiko Miyazaki |
| Assignee | Hakko Corp |
| CPC Classification | B23K3/00, G01K7/00, G01K7/08 |
| Number of Claims | 2 |
Abstract
A heater/sensor with an electric heating coil has an insulating pipe with a bore therein has nonheating wire threaded therethrough. The nonheating wire is attached to a first end of a heating wire which is wound about the periphery of the insulating pipe. A second end of the heating wire is attached to a second nonheating wire. A first ceramic coating of a binder and a coarse grade alumina is formed on the pipe and wires through a dip process. A second ceramic coating of a binder and a fine alumina coating is formed on the first ceramic coating though a second dip process. The twice coated heater/sensor complex is secured in a soldering iron tip.
Claims Summary
1. A heater-sensor complex adapted for use in an integrated replaceable soldering iron heater comprising a soldering tip portion with a recess, a hollow protective pipe fixed on the outer periphery of the base end side of the soldering tip portion and a lead portion with two connecting terminals at the base of the protective pipe, and secured in the recess through first and second ceramic coatings wherein,a heating member and a first non-heating member are made of a first metallic material, a second non-heating member is made of a second metallic materials and the heating member and the forward end of the second non-heating member are connected to form a thermo-couple;