Protection device for dual stage power supply
US6570129B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2002 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A protection device for use on a dual stage power supply for passing a current from first and second paths in unison across an electrode and a workpiece of an electric arc welder. The device includes a resistor connected between generally identical voltage points in the first and second paths, whereby current flows through the resistor based upon the difference in the voltage of the points, a thermostat mounted adjacent the resistor with the thermostat having a known temperature at which the thermostat is tripped and a circuit to provide a signal when said thermostat is tripped to the signal can shut down the power supply until it is reset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.