Digital displacement transducer and method for measurement

G - Physics – 11 – B

Patent

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352/51, 340/135.

G11B 5/86 (2006.01) G01D 5/12 (2006.01) G01D 5/249 (2006.01) H03M 1/00 (2006.01)

Patent

CA 1112330

ABSTRACT OF THE DISCLOSURE A digital displacement transducer to provide a digital output linearly related to the displacement of a contact surface of a device. An eight track tape unit is coded with information related to displacements of 1/256 of an inch and applied to the contact surface. Means are then provided to assume the coded information of the tape unit; the means are of lesser coercivity than the tape unit. The information means is pulsed so that the information contained is the same, and a read out head is provided to read out which information was shifted, and thereby indicate the position of the contact surface of the device. A method is also provided to encode the information in the information means, switch the information therein, and obtain a read out.

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