Disk tracking device

Details Disk tracking device Disk tracking device

1987-05-04

1988-12-20

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Linear

310268, 360 86, 369 49, H02K 3300, G11B 2102

Patent

active

047927070

ABSTRACT:
A tracking device has a linear motor having a driving coil, a speed sensor having a detection coil, and a moving member reciprocated in a predetermined range together with the driving coil and the detection coil. The moving member receives a driving force upon application of a current to the driving coil, and the detection coil generates a signal according to the speed of the moving member. The speed sensor includes two coils connected with each other in such a direction as to phase-cancel an induced voltage due to a magnetic field generated by the driving coil; at least one of the two coils is the detection coil. The detection coil and the driving coil are arranged on one side of the moving member in a single unit.

REFERENCES:
patent: 4260914 (1981-04-01), Hertrich
patent: 4366405 (1982-12-01), Schmider
patent: 4613962 (1986-09-01), Inoue et al.
patent: 4698796 (1987-10-01), Kimura

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