Abstract A simplified arrangement for alternatively displaying in inch or metric numerical units the corresponding lineal value of a digital signal train generated by a measuring transducer. This arrangement includes a counter-display which will alternatively count and display in response to each digital signal in either of two incremental numerical values related by a factor of 25 X 10n. The digital signal rate generation is set such that in counting and displaying in one of the incremental numerical values, the actual measured lineal distance corresponding to each digital signal corresponds to the numerical incremental value in metric units, so that in this mode the counter-display reads out metric (millimeters) directly. In the alternative mode, the digital signals generated are reduced by the ratio 25.0/25.4, eliminating one digital signal in every 63.5 signals generated by appropriate disclosed circuitry, and causing the main counter to count and display in the other incremental numerical value in response to each digital signal, thus resulting in an inch unit read-out.
A measuring system for selectively displaying measured distances in inch or Metric unit systems comprising: counter and display means responsive to each digital signal received to count and numerically display alternatively in numerical increment values of 0.0050 or 0.0002 selectively; digital signal generation means generating a train of digital signals corresponding to measured distances in a given direction, the generation rate of said signals relative to said measured distances being such that the distance corresponding to the generation of one digital signal equalsl 0.0050 millimeters; digital signal transmission control means selectively allowing all of said digital signals in said digital signal train generated by said digital signal generation means to be transmitted to said counter and display means or alternatively suppressing one digital signal at successive alternate intervals of 63 and 64 digital signal counts in said train equivalent to said rate of one signal in 63.5 signals; whereby said counter and display means counts and displays in millimeters in response to said digital signals whenever said digital signal train is transmitted unchanged by said digital signal transmission control means and said counter and display means counts and displays in inch values whenever said digital signals are suppressed by said digital signal transmission control means and said counter and display means counts and displays in said numerical increment value of 0.0002.
Claim 2
Dependent Claim
221 words
A measuring system for selectively displaying measured distances in inch or Metric unit systems comprising: counter and display means responsive to each digital signal received to count and numerically display alternatively in numerical increment values of 0.0050 or 0.0002 selectively; digital signal generation means generating a train of digital signals corresponding to measured distances in a given direction, the generation rate of said signals relative to said measured distances being such that the distance corresponding to the generation of one digital signal equalsl 0.0050 millimeters; digital signal transmission control means selectively allowing all of said digital signals in said digital signal train generated by said digital signal generation means to be transmitted to said counter and display means or alternatively suppressing one digital signal at successive alternate intervals of 63 and 64 digital signal counts in said train equivalent to said rate of one signal in 63.5 signals; whereby said counter and display means counts and displays in millimeters in response to said digital signals whenever said digital signal train is transmitted unchanged by said digital signal transmission control means and said counter and display means counts and displays in inch values whenever said digital signals are suppressed by said digital signal transmission control means and said counter and display means counts and displays in said numerical increment value of 0.0002.
Claim 3
Dependent Claim
31 words
The system of claim 1 wherein said suppression begins with the suppression of the 32nd digital signal generated and said suppression continues at alternate intervals of 63 and 64 signal counts.