Reflective tachometer/headwheel assembly for a rotary head scann

Details Reflective tachometer/headwheel assembly for a rotary head scann Reflective tachometer/headwheel assembly for a rotary head scann

1988-12-19

1990-09-18

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 552, G11B 2102

Patent

active

049582488

ABSTRACT:
For use in a helical scan magnetic tape record/reproduce apparatus, disclosed is a rotary head scanner including a reflective tachometer/headwheel assembly. The rotary head scanner includes a plurality of magnetic record/reproduce heads mounted on a headwheel which has a reflective tachometer disposed on one side of the headwheel. A radiation source and radiation sensor are located adjacent to the reflective tachometer. The radiation sensor senses radiation reflected from the tachometer and produces a signal which is a function of the rotational position and/or rotational speed of the headwheel.

REFERENCES:
patent: 3402257 (1968-09-01), De Lange
patent: 3600508 (1971-08-01), Dann et al.
patent: 4319294 (1982-03-01), Repp

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