Thermal measuring and testing – Thermal calibration system
Patent
1997-09-30
2000-02-29
Bennett, G. Bradley
Thermal measuring and testing
Thermal calibration system
374205, 219 68, 337360, G01N 2534, G01K 1500, B23K 900, H01H 3712
Patent
active
060301147
ABSTRACT:
A method for adjusting the calibration of a circuit breaker trip mechanism including a terminal element, a bimetal element connected thereto, and a trip bar. Laser energy is applied to lanced or pre-bent surfaces of the terminal element to thermally induce displacement thereof and thereby modify a trip distance between the bimetal element and the trip bar. Where a laser beam is directed to fall on a middle leg of a lanced or pre-bent section of the terminal element, the bimetal element moves in one direction relative to the trip bar. Conversely, where a laser beam is directed to fall on lateral legs of the lanced or pre-bent section of the terminal element, the bimetal element moves in an opposite direction relative to the trip bar. Thus, laser energy may be applied from the same direction, or to the same side of the trip structure, regardless of whether the trip time is to be increased or decreased.
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Bergman Robert G.
DiMarco Bernard
Hamann Christoph
Leone David A.
Bennett G. Bradley
Siemens Energy & Automation Inc.
Verbitsky Gail
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