Procedure for forming small wires
AssigneeRaymond Boyd Associates
InventorPaul E. Hendrickson
Life of this patent
Estimating the term…
Abstract
A procedure for drawing ultrafine wires is disclosed which incorporates the steps of inserting a core wire of a selected material into a plurality of telescoped sacrificial sheaths, welding the ends of the core wire to the sheath and successively drawing the combination down to a predetermined diameter. The outside sheath is sacrificed by etching to free the proportionately reduced core wire. The core wire may be initially covered with Teflon to aid in the reduction and the Teflon is removed by exposure to heat.
Claims2
In the method of forming ultrafine wires of a given material including the steps of forming a core wire of a given material, encasing the core wire within an elongate sheath of drawable sacrificial material, successively drawing the sheath to a predetermined reduced cross section to proportionately reduce the core wire and thereafter remove the sheath material by sacrificial methods leaving the proportionately reduced core wire, the improvements in forming a sheath to provide increased sheath to core wire ratios resulting in greater core wire reductions comprising:
- telescoping a plurality of elongate sheaths one within another to form an overall sheath having an inside and outside diameter required to establish the desired reduction ratio.
Dependencies are inferred from the claim text.