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 Title: |
US3842194:
INFORMATION RECORDS AND RECORDING/PLAYBACK SYSTEMS THEREFOR
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Clemens, Jon Kaufmann; Princeton, NJ
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| Assignee: |
RCA Corporation, New York, NY
other patents from RCA CORPORATION (466175) (approx. 7,929)
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| Published / Filed: |
1974-10-15
/ 1971-03-22
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| Application Number: |
US1971000126772
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| IPC Code: |
Advanced:
G11B 3/72;
G11B 9/00;
G11B 9/06;
G11B 9/07;
G11B 9/10;
G11B 11/05;
H04N 5/76;
Core:
G11B 3/00;
G11B 11/00;
more...
IPC-7:
G11B 3/44;
G11B 25/04;
H04N 5/76;
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| U.S. Class: |
Current:
369/126;
369/061;
369/085;
369/101;
369/129;
369/132;
369/279;
369/283;
386/E05.068;
G9B/009.015;
G9B/011.005;
Original:
178/006.6A;
179/100.1B;
179/100.4M;
274/038;
274/041.R;
274/041.A;
274/042.R;
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| Field of Search: |
179/100.1 B,100.4 M,100.41 G,100.4 R,100.4 T
235/61.11 H,61.12 R,61.12 C
178/6.6 A,6.6 DD
274/038,41 R,42 R,43,41 A
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| Priority Number: |
| 1971-03-22 |
US1971000126772 |
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| Abstract: |
An information record employs a storage medium comprising a metallized base material having a dielectric coating thereon. The dimensions of an information track contained in a groove in the storage medium vary in accordance with recorded information. The capacitance between an electrode in a pickup tracking in said groove and the metallized surface of the storage medium varies in accordance with the modulated information track as the pickup device scans the recording medium. Circuitry responding to said capacitance variations provides an output signal corresponding to the information recorded. One application of such a system is to record, on both sides of a disc, video information which can be reproduced in form of a video display.
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| Attorney, Agent or Firm: |
Whitacre, E. M. ;
Meagher, William H. ;
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| Primary / Asst. Examiners: |
Cardillo, Jr., Raymond F.;
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 59 known family members
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First Claim:
Show all 27 claims |
What is claimed is:
1. An information record, adapted for use with a playback stylus to effect recovery of signals occupying a bandwidth of at least several megahertz when relative motion at a desired rate is established between said record and said stylus; said record comprising:
- a disc having a continuous conductive surface, and having a spiral groove in said continuous conductive surface;
- said groove dimensioned for reception therein of said playback stylus and containing an information track constituted by variations in the geometry of the bottom of said groove; said groove bottom geometry variations including variations of adequate fineness of dimension to accommodate recovery of signals of said bandwidth upon establishment of said relative motion at said desired rate and
- a dielectric coating of substantially uniform thickness overlying said conductive surface.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 133 U.S. patent(s) that reference this one
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