Information display system

Claim 2

In information display apparatus including means for storing information indicative of coordinate points on an analog curve, means for selectively reading out the information, and display means for providing an analog display of the read information, the improvement comprising: marker means connected to the display means for marking a selected coordinate point on said analog display; counter means for storing a count related to a selected coordinate point; comparator means; said comparator means connecting said counter means to the means for reading out the information for providing a marker signal on selected comparison therebetween; means connecting said comparator meaNs to said marker means for providing said marker signal thereto; control means connected to said counter means for selectively providing count pulses thereto for varying the selected coordinate point in any direction along said analog display; and further display means operatively connected to said marker means for displaying the information indicative of the selected coordinate point in alpha-numeric form.

Claim 3

The apparatus of claim 1, in which said control means varies the selected point at a constant rate.

Claim 4

The apparatus of claim 1 in which said control means is manually operable and the rate of change of the selected point is controllable by the operator.

Claim 5

The apparatus of claim 1 in which said counter means is constructed and arranged to count up or down and said control means includes means for providing count-up pulses or count-down pulses.

Claim 6

The apparatus of claim 4 including further means connected to said counter means for providing a predetermined number of count pulses to said counter means.

Claim 7

The apparatus of claim 1 including means for providing the count pulses at a constant frequency.

Claim 8

The apparatus of claim 1 including means for providing the count pulses at selectable varying frequencies.

Claim 9

The apparatus of claim 1 in which the display means includes a cathode-ray tube having beam drive means; and said marker means includes means connected to said beam drive means for selectively varying the intensity of the beam.

Claim 10

The apparatus of claim 1 in which said control means comprises: elongated translucent means having variable opacity along its length; light source means mounted adjacent to said translucent means; light sensing means mounted to receive light from said light source means through said translucent means; and means for providing relative movement between said translucent means and said light source means.

Claim 11

The apparatus of claim 9 including means yieldingly biasing said translucent means and said light source means to a predetermined relative position.

Claim 12

The apparatus of claim 9 in which said means for providing relative movement comprises lever means for carrying said translucent means; said lever means being pivotally mounted for arcuate movement.

Claim 13

The apparatus of claim 11 including further sensing means mounted in operative relation to said lever means for sensing the direction of movement thereof.

Claim 14

The apparatus of claim 12 in which said marker means comprises reversible counter means.

Claim 15

In a data display system including digital memory means, address counter means for controlling data transmission to and from said memory means, memory data register means for storing data being read out of and written into said memory means, analog display means for displaying an analog waveform having coordinate points related to the digital data stored in said memory means, the improvement comprising: first control means connected to said memory means, said address counter means and said memory data register means, for selectively cyclicly reading data out of said memory means; reversible digital counter means; second control means connected to said reversible counter means for providing count pulses thereto and for determining the direction of count caused by the count pulses; digital comparator means; said comparator means connected to said reversible counter means and said address counter means for comparing the states of said counters and for providing a control pulse in the presence of a selected comparison between said counters; means connecting said comparator means to said analog display means for providing said control pulse thereto to mark a selected coordinate point on a displayed analog waveform; digital to analog converter means connected between each of said address counter means and said memory data register means and said analog display means, for providing voltage signals to said analog display means proportional to the digital data stored in said address counter means and sAid memory data register means; and first and second display register means; means connecting said first display register means to said address counter means; means connecting said second display register means to said memory data register means; and first and second alpha-numeric display means connected, respectively, to said first and second display register means.

Claim 16

In a data display system including digital memory means, address counter means for controlling data transmission to and from said memory means, memory data register means for storing data being read out of and written into said memory means, analog display means for displaying an analog waveform having coordinate points related to the digital data stored in said memory means, the improvement comprising: first control means connected to said memory means, said address counter means and said memory data register means, for selectively cyclicly reading data out of said memory means; reversible digital counter means; second control means connected to said reversible counter means for providing count pulses thereto and for determining the direction of count caused by the count pulses; digital comparator means; said comparator means connected to said reversible counter means and said address counter means for comparing the states of said counters and for providing a control pulse in the presence of a selected comparison between said counters; means connecting said comparator means to said analog display means for providing said control pulse thereto to mark a selected coordinate point on a displayed analog waveform; digital to analog converter means connected between each of said address counter means and said memory data register means and said analog display means, for providing voltage signals to said analog display means proportional to the digital data stored in said address counter means and sAid memory data register means; and first and second display register means; means connecting said first display register means to said address counter means; means connecting said second display register means to said memory data register means; and first and second alpha-numeric display means connected, respectively, to said first and second display register means.

Claim 17

The apparatus of claim 14 in which said second control means comprises: elongated translucent means having variable opacity along its length; light source means mounted adjacent to said translucent means; light sensing means mounted to receive light from said light source means through said translucent means; and means for providing relative movement between said translucent means and said light source means.

Claim 18

The apparatus of claim 15 including means yieldingly biasing said translucent means and said light source means to a predetermined relative position.

Claim 19

The apparatus of claim 16 in which said means for providing relative movement comprises lever means for carrying said translucent means; said lever means being pivotally mounted for arcuate movement.

Claim 20

The apparatus of claim 17 including further sensing means mounted in operative relation to said lever means for sensing the direction of movement thereof.

Claim 21

The apparatus of claim 14 including: further control means for providing a predetermined number of count pulses and a count direction signal to said reversible digital counter means; and means connecting said further control means to said reversible digital counter means.