Spring-suspension magnetically stabilized pick-up arm

Details Spring-suspension magnetically stabilized pick-up arm Spring-suspension magnetically stabilized pick-up arm

2006-08-01

2006-08-01

Cao, Allen (Department: 2652)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

07086071

ABSTRACT:
The invention relates to a pick-up arm system for the reproduction or replay of records comprising a pick-up arm chassis and a pick-up arm tube. The torsion element suspension of the pick-up arm is axially stabilized by means of cylindrical permanent magnets which are arranged in a vertical direction and have opposite polarities, said elements forming a rotating bearing or a pivot. According to the invention, the torsion element runs in a congruent manner with respect to the vertical axis of rotation through the horizontal point of rotation of the receiving element for the tube of the pick-up arm. The lower part of the torsion element is connected to a permanent magnet which is connected to the receiving element for the pick-up arm or tube and the upper part of the torsion element is fixated attached to the upper chassis of the pick-up arm. A second permanent magnet or otherwise attached of opposite polarity is fixated in the lower chassis of the pick-up arm in a perpendicular position below said permanent magnet.

REFERENCES:
patent: 3924076 (1975-12-01), Dubois
patent: 4121837 (1978-10-01), Tominari et al.
patent: 4570253 (1986-02-01), Firebaugh
patent: 4995025 (1991-02-01), Schulze
patent: 5440183 (1995-08-01), Denne
patent: 2260855 (1974-06-01), None
patent: 3002013 (1981-07-01), None

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