Electric logging data recorded on an analog film strip is in terrible form for input to a machine, such as an electronic computer. Use of machine processing of logging data is, at present, limited in part by time and accuracy of getting data into a machine. Manual curve following devices are generally one curve devices, slow in operation. Automatic optical scanners fail to separate desired curves or data from other marks on the input film strip. This paper describes a magnetic ink analog film strip scanner. Although this method requires tracing over the desired curves with a magnetic ink ball point pen, undesired marks on the input film strip are eliminated. Four curves are provided for in the automatic operation of the present scanner. Design and operation of the scanner are described with examples of use as an input device to an analog computer with recorded film strip output of input data and computed data. Examples of use of the scanner as an input device to a digital assembly unit, with recorded digital magnetic tape output for digital computer use, is described.

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