Patent · US Expired

Testing device for both-sided contacting of component-equipped printed circuit boards

US4841241A · kind A · utility

19Cited by

6References

20Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wolfgang Hilz · Munich, DE
Rudolf Schuster · Heimstetten, DE
Hans Schauflinger · Munich, DE

Key dates

Filing date	Jul 21, 1987
Grant date	Jun 20, 1989
Priority date	—
Expiry date	Jul 21, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG01R1/07321
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A lower needle adapter has lower, resilient contact needles and an upper needle adapter has upper, resilient contact needles which are provided for contacting of both sides of component equipped printed circuit boards. Defined contacting conditions having correspondingly high contact reliabilities are achieved in that the printed circuit boards are pressed against opposite pressure rams arranged in non-yielding fashion, being pressed thereagainst by resiliently fashioned pressure rams. When resilient, upper pressure rams are used to press the printed circuit boards against lower pressure rams which are adjustable in height in two stages, then a both-sided, two-stage contacting can be realized in a simple way with corresponding, additional, shorter lower and upper contact needles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.