Recording and/or reproducing apparatus for a magnetic record car

Details Recording and/or reproducing apparatus for a magnetic record car Recording and/or reproducing apparatus for a magnetic record car

1978-10-16

1979-11-27

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 2110

Patent

active

041763815

ABSTRACT:
A recording and/or reproducing apparatus for a record carrier in the form of a tape, with a plurality of parallel longitudinal tracks. The apparatus comprises positioning means for controlling the position of the write/read head transverse to the direction of movement of the record carrier. The control signal for these positioning means is obtained with the aid of two optical systems, which each comprise a light-emitting element for emitting a radiation beam which is aimed at one edge of the record carrier and a light-receiving element for picking up the amount of light which shines past said record carrier, at least one of the elements of each optical system being rigidly connected to the write/read head. A detection device is coupled to the two light-receiving elements, which device derives the desired control signal from the amounts of light received by these two light-receiving elements.

REFERENCES:
patent: 3945037 (1976-03-01), Johnson
patent: 4123788 (1978-10-01), Kruger

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