Browse Prior Art Database

Wire Feeding Tool

IP.com Disclosure Number: IPCOM000092147D
Original Publication Date: 1968-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Chontos, JD: AUTHOR

Abstract

Ordinary wire handling techniques are subject to several problems when applied to the wiring and soldering of miniaturized circuit boards. For example, excessive manipulation causes wire to be weakened at the solder joint, wire and insulation are damaged by tweezers, and it is difficult to wire point-to-point, maintaining the shortest possible wire lengths.

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Wire Feeding Tool

Ordinary wire handling techniques are subject to several problems when applied to the wiring and soldering of miniaturized circuit boards. For example, excessive manipulation causes wire to be weakened at the solder joint, wire and insulation are damaged by tweezers, and it is difficult to wire point-to-point, maintaining the shortest possible wire lengths.

A standard hypodermic syringe with a fine hypodermic needle serves as a tool for such applications. Wire 12 is fed from a spool, not shown, through syringe barrel 14 and needle 16. Plunger 18 is then inserted. Its rubber seal 20 provides enough drag on wire 12 to prevent it from being pulled out accidentally. The wire spool can be separate from or mounted on the syringe.

With approximately one-eighth inch of wire extending from the point, needle 16 is placed on circuit board 24. The wire end is then soldered to pad 22 on board 24 with pointed soldering tip 28. The syringe tip is then moved near the next pad 26, drawing wire 12 under tension through the syringe. Tip 28 is again used to make the connection. When the net of connections is complete, the needle tip can be used to sever the wire at the final soldered joint. This operation leaves sufficient wire extending from tip to start further wiring.

If desired, a spool for supplying wire 12 can be mounted either by a bracket, fastened to the exterior of barrel 14, or to the needle fitting and extending upwardly to a convenient position adjacen...