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optical comparator General Purpose Charts

optical comparator Radius and Angle Charts

optical comparator Single Quadrant Radius      Chart

optical comparator 360° Radius and Angle      Charts

optical comparator 360° Combination Radius      Charts

optical comparator Grid and Radius Charts

optical comparator Grid Charts

optical comparator Step Radius Charts

optical comparator Fillet Charts

optical comparator Long Radius Charts

optical comparator Radius and Protractor      Charts

optical comparator Screw Thread Charts


Grid Charts

J&L Grid Charts furnish a rapid means of making coordinate or unit measurements of heights, widths, or contours.

1. Provide a rapid, simple means of measurement on comparators not equipped with measuring facilities.

2. Will inspect spacing easily on such things as filament wires, threads in cloth, woven wire, pen point nibs, small form tools, etc.

3. Useful when used as a master for checking temporary charts made on J&L blank drawing charts.

4. When a permanent photographic record is to be made, a grid chart, photographed with the image, gives an accurate scale wit which to read the picture.

5. Angels, specified in terms of taper per inch, can also be determined readily by noting the ratio between horizontal and vertical increments.optical comparators

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