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Position and Force Transducer for a Spring-Loaded Electrical Connector

IP.com Disclosure Number: IPCOM000039180D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Chikazawa, T [+details]

Abstract

Simultaneous measurement of both normal force and wipe length in a circuit card connector is made possible by a test card provided for each pin position with two piezoelectric force transducers and with an insulating bridge under the pin tab. The force transducers measure compressive forces F1 and F2 under the bridge abutments. The pin-tab normal force is F1 + F2; the position of pin-tab contact point x is calculated from the F1/F2 balance. Two measurements of x, early and late in the pin action, provide a calculation basis for measuring the wipe length. The conductivity of a spring-loaded electrical connector is a function of: 1. Wiping action of the connector pin on a mating tab of the circuit card.