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Browse Prior Art Database

Twin Lead Contact Probe

IP.com Disclosure Number: IPCOM000075046D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Buyck, WJ: AUTHOR

Abstract

This probe uses two springs wound in a twin-lead helix to provide two separate and independent contacts in the same space as formerly occupied by a single plunger contact with one circuit path.

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Twin Lead Contact Probe

This probe uses two springs wound in a twin-lead helix to provide two separate and independent contacts in the same space as formerly occupied by a single plunger contact with one circuit path.

The contact springs 1 and 2 are wound from hardened beryllium copper wire and covered with insulation 3. The springs are wound on an identical pitch and their ends formed parallel to the spring center line. One spring is axially rotated 180 degrees with respect to the other to form a twin-lead helix. End plugs 4 and 5 maintain the relative rotational alignment of the springs. Terminal plug 4 provides for fastening the springs at the terminal end. Plunger plug 5 provides a guide for the contact points which slide axially in the plug. Barrel 6, a rigid tube, maintains the axial separation of the end plugs, provides protection and confinement to prevent buckling of the springs, when they are in compression, and gives the assembly a mechanical rigidity.

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