FR2291571B1 - - Google Patents
Info
- Publication number
- FR2291571B1 FR2291571B1 FR7535048A FR7535048A FR2291571B1 FR 2291571 B1 FR2291571 B1 FR 2291571B1 FR 7535048 A FR7535048 A FR 7535048A FR 7535048 A FR7535048 A FR 7535048A FR 2291571 B1 FR2291571 B1 FR 2291571B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
- G11B9/07—Heads for reproducing capacitive information
- G11B9/075—Heads for reproducing capacitive information using mechanical contact with record carrier, e.g. by stylus
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/44—Styli, e.g. sapphire, diamond
- G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
- G11B3/48—Needles
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49926/74A GB1524032A (en) | 1974-11-18 | 1974-11-18 | Video disc stylus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2291571A1 FR2291571A1 (fr) | 1976-06-11 |
| FR2291571B1 true FR2291571B1 (US06168655-20010102-C00055.png) | 1979-05-11 |
Family
ID=10454033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7535048A Granted FR2291571A1 (fr) | 1974-11-18 | 1975-11-17 | Aiguille de lecture de videodisques |
Country Status (6)
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1585546A (en) * | 1976-04-08 | 1981-03-04 | Victor Company Of Japan | Information signal recording system |
| US4491941A (en) * | 1976-04-08 | 1985-01-01 | Victor Company Of Japan, Ltd. | Reproducing stylus for an information signal recording medium |
| GB1592361A (en) * | 1976-09-13 | 1981-07-08 | Rca Corp | Stylus manufacture |
| US4273967A (en) * | 1976-11-17 | 1981-06-16 | Victor Company Of Japan, Limited | Stylus for reproducing capacitive videodisc |
| JPS5362501A (en) * | 1976-11-17 | 1978-06-05 | Victor Co Of Japan Ltd | Scanning needle |
| NL179765C (nl) * | 1976-11-17 | 1986-11-03 | Victor Company Of Japan | Naald voor het weergeven van informatiesignalen, die op een registratiemedium zijn geregistreerd. |
| US4497052A (en) * | 1976-11-17 | 1985-01-29 | Victor Company Of Japan, Ltd. | Stylus for reproducing information signals recorded on a recording medium |
| JPS5395802U (US06168655-20010102-C00055.png) * | 1977-01-06 | 1978-08-04 | ||
| US4104832A (en) * | 1977-03-25 | 1978-08-08 | Rca Corporation | Method for forming keel-tipped stylus for video disc systems |
| US4162510A (en) * | 1977-03-25 | 1979-07-24 | Rca Corporation | Keel-tipped stylus for video disc systems |
| US4124867A (en) * | 1977-03-28 | 1978-11-07 | Rca Corporation | Narrowed-electrode pickup stylus for video disc systems |
| US4098030A (en) * | 1977-03-28 | 1978-07-04 | Rca Corporation | Method for forming a narrowed-electrode pickup stylus for video disc systems |
| JPS54141901U (US06168655-20010102-C00055.png) * | 1978-03-25 | 1979-10-02 | ||
| US4315358A (en) * | 1980-04-21 | 1982-02-16 | Rca Corporation | Method for the manufacture of capacitive pickup styli |
| JPS57120247A (en) * | 1981-12-07 | 1982-07-27 | Victor Co Of Japan Ltd | Reproducing stylus |
| JPS60370A (ja) * | 1983-06-16 | 1985-01-05 | Victor Co Of Japan Ltd | 円盤状情報記録媒体の欠陥検査装置 |
| JPH0523301A (ja) * | 1991-07-24 | 1993-02-02 | Kowa Co | 視野計 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3930117A (en) * | 1974-11-14 | 1975-12-30 | Rca Corp | Video capacitive disc playback apparatus and stylus with dielectric coating therefor |
-
1974
- 1974-11-18 GB GB49926/74A patent/GB1524032A/en not_active Expired
-
1975
- 1975-06-30 US US05/591,953 patent/US4031546A/en not_active Expired - Lifetime
- 1975-10-30 CA CA238,638A patent/CA1075810A/en not_active Expired
- 1975-11-12 JP JP50136769A patent/JPS5172403A/ja active Granted
- 1975-11-17 FR FR7535048A patent/FR2291571A1/fr active Granted
- 1975-11-18 DE DE2551794A patent/DE2551794C3/de not_active Expired
-
1976
- 1976-12-08 JP JP14828176A patent/JPS5284724A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2551794C3 (de) | 1979-09-06 |
| JPS5284724A (en) | 1977-07-14 |
| DE2551794A1 (de) | 1976-05-20 |
| JPS5172403A (en) | 1976-06-23 |
| DE2551794B2 (US06168655-20010102-C00055.png) | 1979-01-11 |
| FR2291571A1 (fr) | 1976-06-11 |
| JPS5647601B2 (US06168655-20010102-C00055.png) | 1981-11-11 |
| GB1524032A (en) | 1978-09-06 |
| CA1075810A (en) | 1980-04-15 |
| US4031546A (en) | 1977-06-21 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |