Spring contact twister probe for testing electrical printed circuit boards
US5009613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1990 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/06722
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spring contact twisting electrical contact spring probe for testing electrical printed circuit boards includes a barrel having a spring seating end and an open end, a compression spring seated in the closed end of the barrel, and a plunger inserted into the barrel. The plunger includes a tail section, connected to a twister section comprising a square rod twisted along its longitudinal axis, and a shaft or probe section that protrudes from the barrel and includes the probe tip. Four crimps in the barrel retain the plunger inside the barrel and interact with the helical crests on the twister section to cause the plunger to rotate along its longitudinal axis as it reciprocates within the barrel. The twister section is retained entirely within the barrel at all times. The rotating plunger tip has edges that scrape off contaminants or coatings on the test sites of the circuit boards to obtain a sufficient electrical connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.