Method and appartus for making hard copy records of curves inclu

Details Method and appartus for making hard copy records of curves inclu Method and appartus for making hard copy records of curves inclu

1976-08-26

1978-02-14

Hartary, Joseph W.

Recorders

Writers

Receiver and marker movable

340324AD, 364718, 364723, G06G 730

Patent

active

040742814

ABSTRACT:
A line scan cathode ray tube (CRT) recorder generates a hard copy record of a curve from stored data representing the X-Y coordinates of a series of sample points along the curve. The curve may be described mathematically by a multi-valued function. One pass of the recording media past a linear sweeping CRT beam records the entire curve in a predetermined number of recording sweeps. The distance (.DELTA.X and .DELTA.Y, respectively) between each and every X.sub.n, Y.sub.n and the next successive stored sample point X.sub.n+1, Y.sub.n+1 is determined prior to each recording sweep of the beam and these distances, .DELTA.X and .DELTA.Y, are divided by a predetermined number to give a factor interpolating the distance between successively stored data points (X.sub.n and X.sub.n+1 and Y.sub.n and Y.sub.n+1). Each recording sweep of the beam represents a band (in the X-axis direction, for example) on the recording media of finite width extending from one recording sweep position up to, but not including, the next recording sweep position. The X-Y coordinates of each sample point are successively incremented by the interpolative value .DELTA.X
and .DELTA.Y
, respectively, where "n" equals the number of interpolative steps. The Y-axis coordinate positions of the interpolative value (Y+ n.DELTA. Y
!) are stored corresponding to the interpolative X-axis coordinate (X+ n.DELTA. X
!) positions within the finite band to be recorded. As the beam sweeps along a given X-axis position, it records a short line for each stored Y-axis position.

REFERENCES:
patent: 3605109 (1971-09-01), Tyler
patent: 3686662 (1972-08-01), Blixt
patent: 4038668 (1977-07-01), Quarton

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