Patent ID: 8749259

Claim:
A full grid cassette for an apparatus for testing non-componented printed circuit boards, the full grid cassette electrically connects contact points of a basic grid to individual test needles of an adapter, wherein the full grid cassette comprises: a basic grid plate oriented towards the basic grid and an adapter plate oriented towards the adapter, wherein aligned through holes in each of the basic grid plate and the adapter plate are provided to accommodate spring contact pins, each of the spring contact pins being made from a wire with a helically wound spring section and located without sheathing in the through holes of the adapter plate and of the basic grid plate and the spring sections extending at least across a region between the adapter plate and the basic grid plate; and a film located between the adapter plate and the basic grid plate and provided with holes through each of which one of the spring contact pins passes, the width of the holes being less than the maximum diameter of the spring contact pins.