Printed circuit board

Claim 2

A printed circuit board for multipurpose use, comprising, in combination, a thin, flat insulation board member, a plurality of longitudinally extending, mutually parallel, electrically conductive circuit tracks printed on one face of said insulation board member, each of said circuit tracks being provided along its length with a plurality of spaced connection stations of increased width, the circuit track sections between said connection stations each being comprised of a pluralIty of narrow, spaced, parallel track portions, the connection stations of said parallel circuit tracks being so arranged therealong as to present a uniform grid of track stations, a first set of indicia printed in a vertical row on said insulation board to identify individual horizontal rows of said connection stations, and a second set of indicia printed in a horizontal row on said insulation board to identify individual vertical rows of said connection stations, said first and second sets of indicia comprising means for any one of said connection stations by rectangular coordinates, and a plurality of closed-circuit peripheral tracks printed on said insulation board member surrounding said plurality of longitudinally extending tracks and being of the same construction thereas, the connection stations of said peripheral tracks conforming in their placement to said uniform grid presentation of said longitudinally extending tracks.

Claim 3

A printed circuit board for multipurpose use comprising, in combination, a thin, flat insulation board member, a first plurality of longitudinally extending, electrically conductive circuit tracks printed in mutually parallel, equidistantly spaced disposition on said insulation board member, said first plurality of circuit tracks being provided, along their lengths, with a plurality of equidistantly spaced connection stations of increased width, a second plurality of longitudinally extending, mutually parallel circuit tracks printed on said insulation board in centrally spaced relation between said first plurality of tracks, said second plurality of circuit tracks being provided along their lengths with a plurality of equidistantly spaced connection stations of increased width, the circuit track sections between said connection stations each being comprised of a plurality of narrow, spaced, parallel track portions, the connection stations of said second plurality of circuit tracks being staggered between the connection stations of said first plurality of tracks to define, together with the connection stations of said first plurality of tracks, a uniform grid of track stations, a first set of indicia printed in a vertical row on said insulation board to identify individual horizontal rows of said connection stations, and a second set of indicia printed in a horizontal row on said insulation board to identify individual vertical rows of said connection stations, said first and second sets of indicia comprising means for identifying any one of said connection stations by rectangular coordinates, said connection station being of annular shape defining a circular, central, nonconductive zone serving as a locating point for a drilling operation when required for circuit connection thereto, one of said indicia sets comprising a sequence of numerals and the other of said indicia sets comprising a sequence of alphabetical letters, and a plurality of closed-circuit peripheral tracks printed on said insulation board member and surrounding said first and second pluralities of longitudinally extending tracks and being of the same construction thereas, the connection stations of said peripheral tracks conforming in their placement to the uniform grid presentation of said first and second pluralities of tracks.

Claim 4

A printed circuit board for multipurpose use comprising, in combination, a thin, flat insulation board member, a first plurality of longitudinally extending, electrically conductive circuit tracks printed in mutually parallel, equidistantly spaced disposition on said insulation board member, said first plurality of circuit tracks being provided, along their lengths, with a plurality of equidistantly spaced connection stations of increased width, a second plurality of longitudinally extending, mutually parallel circuit tracks printed on said insulation board in centrally spaced relation between said first plurality of tracks, said second plurality of circuit tracks being provided along their lengths with a plurality of equidistantly spaced connection stations of increased width, the circuit track sections between said connection stations each being comprised of a plurality of narrow, spaced, parallel track portions, the connection stations of said second plurality of circuit tracks being staggered between the connection stations of said first plurality of tracks to define, together with the connection stations of said first plurality of tracks, a uniform grid of track stations, a first set of indicia printed in a vertical row on said insulation board to identify individual horizontal rows of said connection stations, and a second set of indicia printed in a horizontal row on said insulation board to identify individual vertical rows of said connection stations, said first and second sets of indicia comprising means for identifying any one of said connection stations by rectangular coordinates, said connection station being of annular shape defining a circular, central, nonconductive zone serving as a locating point for a drilling operation when required for circuit connection thereto, one of said indicia sets comprising a sequence of numerals and the other of said indicia sets comprising a sequence of alphabetical letters, and a plurality of closed-circuit peripheral tracks printed on said insulation board member and surrounding said first and second pluralities of longitudinally extending tracks and being of the same construction thereas, the connection stations of said peripheral tracks conforming in their placement to the uniform grid presentation of said first and second pluralities of tracks.