Rotary encoder apparatus

Details Rotary encoder apparatus Rotary encoder apparatus

1987-05-12

1988-10-25

Sloyan, Thomas J.

Coded data generation or conversion

Digital pattern reading type converter

With directional discrimination

250231SE, 341 13, H03M 130

Patent

active

047807032

ABSTRACT:
A rotary encoder apparatus of an incremental-type construction, including: a rotary unit mechanically joined to a movable machine; a unit for outputting at least two signals having a phase shift and a periodic waveform in response to rotation of the rotary unit; a battery-type power supply; and an electric circuit including a circuit for generating a timing pulse having predetermined frequency and pulse width, a circuit for detecting a change of the signals from the signal outputting circuit and for outputting a pulse signal in response to the change of signals, and a circuit for counting the pulse signal from the signal-change detecting circuit. The apparatus may be optical or magnetic in construction.

REFERENCES:
patent: 2926335 (1960-02-01), Bower
patent: 3914760 (1975-10-01), Logue
patent: 3944813 (1976-03-01), Fowler
patent: 4117320 (1978-09-01), Tomlinson et al.
patent: 4156467 (1979-05-01), Patton et al.
patent: 4319134 (1982-03-01), Weber
Electrical Design News, vol. 27, No. 20, Oct. 1982, p. 187, Boston, Mass., U.S.; D. M. Pfister: "2-IC Circuit Decodes Quadrature Waveforms", *The whole document*.

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