Arrangement for preventing ambiguity in digital displacement mea

Details Arrangement for preventing ambiguity in digital displacement mea Arrangement for preventing ambiguity in digital displacement mea

1973-03-30

1976-03-30

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340173LT, 235 6111E, 307238, 328151, H03K 1300

Patent

active

039478432

ABSTRACT:
The displacement of a first element relative to a second element in a predetermined direction is measured by a code display which has sets of code markings, each set representing a predetermined unit of displacement, spaced at predetermined distances from each other in said predetermined direction. The code display also has control markings each of which indicates the center of the set of code markings taken in the predetermined direction. Transducers sense the code markings and the control markings and furnish, respectively, corresponding data and control signals. An output circuit furnishes output signals corresponding to the data signals only upon simultaneous receipt of the control signals and the data signals, thereby assuring that the read-out means are substantially at the center of the code markings during read-out. The output signals may be stored until receipt of the next subsequent control signal.

REFERENCES:
patent: 2796598 (1957-06-01), Cartwright
patent: 2899673 (1959-08-01), Reiner
patent: 3454943 (1969-07-01), Brown
patent: 3502850 (1970-03-01), Lindquist et al.
patent: 3510683 (1970-05-01), Rotier
patent: 3588452 (1971-06-01), Kee
patent: 3594735 (1971-07-01), Furlong et al.
patent: 3594764 (1971-07-01), Walsh
patent: 3641564 (1972-02-01), Fassett et al.
patent: 3758752 (1973-11-01), Kapsambelis et al.

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