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Browse Prior Art Database

Microbrazing Terminating Technique for Magnet Wire

IP.com Disclosure Number: IPCOM000076859D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Burns, TA: AUTHOR [+2]

Abstract

The drawing shows a circuit and apparatus for forming a braze or weld at two points between the wire 1 and the copper terminal pad 2 on substrate 9. The welder has two U-shaped welding electrodes 3, 4. Two transformers 5, 6 are connected to produce a current flow in electrodes 3, 4 for heating and removing the insulation on wire 1. Preferably, the two pulse transformers 5, 6 are energized in sequence to strip the insulation. The pulse transformer 7 is connected with a diode 8 in its secondary with the polarity as shown. The diode 8 prevents either transformer 5 or 6 from completing its circuit through the wire 1 through the other electrode and transformer 7 secondary, before completely stripping the insulation. This feature also eliminates passing the larger insulation stripping current through the wire and exploding it.

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Microbrazing Terminating Technique for Magnet Wire

The drawing shows a circuit and apparatus for forming a braze or weld at two points between the wire 1 and the copper terminal pad 2 on substrate 9. The welder has two U-shaped welding electrodes 3, 4. Two transformers 5, 6 are connected to produce a current flow in electrodes 3, 4 for heating and removing the insulation on wire 1. Preferably, the two pulse transformers 5, 6 are energized in sequence to strip the insulation. The pulse transformer 7 is connected with a diode 8 in its secondary with the polarity as shown. The diode 8 prevents either transformer 5 or 6 from completing its circuit through the wire 1 through the other electrode and transformer 7 secondary, before completely stripping the insulation. This feature also eliminates passing the larger insulation stripping current through the wire and exploding it. Transformer 7 is energized for producing two welds, one under electrode 3 and the other under electrode 4. Since the wire 1 is parallel to the copper foil 2, it shares the current reducing the heating on fine-line circuitry, but ideally, all the current passes through the wire just below the electrodes for maximum heating.

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