Testing device for electrical circuit boards

Claim 1

A testing device for testing an electric circuit board having test terminals thereon parallel to each other, the testing device comprising: a resilient wedge shaped pressing member having first and second opposite facing planar sides, and a pressing edge formed at the tapered termination of said first and second opposite planar sides of said pressing member, a flexible, insulative base sheet including a first face region having conductor strips etched thereon in a pattern corresponding to the test terminals on said electric circuit board, said first face region being in contact with said pressing edge of said pressing member for effecting contact between said conductor strips on said first face region and said test terminals, said flexible sheet having second and third face regions in contact with said first and second planar sides, respectively, of said pressing member, said first face region being located between said second and third face regions, said conductor strips extending to outer peripheral edges on said second and third face regions of said base sheet, and wherein spacing between adjacent conductor strips in said second and third face regions of said base sheet is at least twice as large as the spacing between adjacent conductor strips in said first face region of said base sheet.