Method and apparatus for recording video signals into a metal su

Details Method and apparatus for recording video signals into a metal su Method and apparatus for recording video signals into a metal su

1981-12-14

1984-02-21

Goldberg, Gerald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369277, G11B 300

Patent

active

044334079

ABSTRACT:
A cutting stylus is positioned with respect to a metal substrate in order to cut a groove. The cutting stylus is vibrated about a quiescent position in response to a relatively high frequency signal while cutting the groove in order to cut an information track comprising short wavelength modulation of the groove depth. Relative motion is established between the metal substrate and the cutting stylus such that the information track is cut along a spiral path. The relative motion is varied in a predetermined manner as the stylus cuts across the surface of the metal substrate such that the spiral information track is formed having a varying pitch to reduce the formation of damaging ridges on the cutting edge of the stylus.

REFERENCES:
patent: 3075052 (1952-05-01), Terry
patent: 3842194 (1974-10-01), Clemens
patent: 4035590 (1977-07-01), Halter
patent: 4044379 (1977-08-01), Halter

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