Measuring magnifier with special reticle

A reticle for use in a measuring device for determining whether the width of bars or spaces are within prescribed limits comprising:

• a transparent glass-like panel;
• a plurality of spaced parallel reference lines on the panel;
• and
• at least two circles tangent to and on the same side of each line with the circles tangent to the same reference line having diameters related to the prescribed limits of different bars or spaces to be measured.

A method for visually determining whether the width of a bar or space falls within prescribed tolerances comprising:

• providing an outline of a first geometric figure;
• providing an outline of a second geometric figure;
• placing said first and second geometric figures in overlying relation to said bar or space to be measured with at least a portion of an edge of each of said figures coinciding with said edge of said bar or space, said geometric figures being of predetermined dimensions in which one of said figures corresponds to the minimum acceptable width and the other of said figures corresponds to the maximum acceptable width, said figures further being placed so that said figures have a common overlapping reference point at said region in which they overlap said edge of said bar or space;
• and
• visually determining whether the opposite edge of said bar or space extends through one, both or neither of said geometric figures.

A measuring device for determining whether the width of a bar or space lies within prescribed limits comprising:

• a transparent panel;
• a reference line formed on the panel;
• a plurality of comparison groups formed on the panel, each of the comparison groups including a pair of geometric figures spaced from each other and from the reference line, the geometric figure disposed nearer the reference line corresponding to the minimum acceptable width of said bar or space to be measured and the more distal of the geometric figures corresponding to the maximum acceptable width of said bar or space to be measured;
• each pair of geometrical figures being spaced by different increments from the reference line;
• and
• each pair of geometrical figures being spaced from the other pairs of geometrical figures along a direction which parallels the reference line.

A method for visually determining whether the width of a bar or space falls within prescribed tolerances comprising:

• providing a transparent panel having a reference region formed thereon and a pair of geometric figures formed thereon in spaced relation to each other and to said reference region, the geometric figure nearer to the reference line corresponding to the minimum acceptable width of the bar or space to be measured and the geometric figure more distal from the reference line corresponding to the maximum acceptable width of said bar or space;
• placing said transparent panel over said bar or space to be measured so that the reference region overlies one edge of the bar or space to be measured;
• and
• visually determining whether the opposite edge of the bar or space extends within the space defined by the first and second geometric figures.

A method for visually determining whether the width of a bar or space falls within prescribed tolerances comprising:

• providing a transparent panel having a reference line formed thereon and a plurality of comparison groups formed thereon, each of the comparison groups including a pair of geometric figures spaced from each other and from the reference line, the geometric figures in each comparison group which is disposed nearer the reference line corresponding to a minimum acceptable width of said bar or space to be measured and the more distal of the geometric figures in that comparison group corresponding to the maximum acceptable width of said bar or space to be measured, each of the comparison groups being spaced by different increments from the reference line, and each comparison group also being spaced from each of the other comparison groups along a direction which parallels the reference line;
• placing said panel in overlying relation to the bar or space to be measured with the reference line in alignment with one edge of the bar or space to be measured;
• and
• visually determining whether the opposite edge of the bar or space being measured extends between any pair of geometrical figures in any of the comparison groups.

A measuring magnifier for determining whether the width of a bar of space falls within predetermined tolerances limits comprising:

• a barrel;
• a magnifying lens mounted to one end of the barrel;
• a recticle mounted to the other end of said barrel;
• and
• indicia formed on said recticle, said indicia including means defining a reference location and a pair of geometrical figures, each of said figures being spaced from said reference location in the same general direction, each of said figures having at least a portion located distally from said reference location, at least the distal portions of each of said figures being spaced from each other, the distance between said reference location and the distal portion of the nearer of said figures corresponding to the minimum acceptable width of said bar or space to be measured and the distance between said reference locacation and the distal portion of the more distal of said figures corresponding to the maximum acceptable width of said bar or space to be measured.