US4011003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically controllable pivoting mirror device
Assignee: US Philips Corp
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Filing: 1976-01-26
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Granted: 1977-03-08
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Expires: 1996-01-26
Abstract
Abstract An electromagnetically controllable pivoting device for pivoting a reflecting surface of a pivoting mirror about pivotal axes parallel to said surface with the aid of electrical control signals, more particularly intended for a video disc player in which a light beam is produced by means of a light source, which beam is aimed at an information track of a rotating optically readable video disc by means of the reflecting surface of the pivoting mirror. The mirror is supported by a bellows body of an elastically deformable plastic, which bellows body is provided with at least one rotation-symmetrical fold which is concentric with the optical center of the reflecting surface.
Inventors
- 👤 Jan Cornelis Willem Dragt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:52
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/182; G02B7/1821
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
An electromagnetically controllable pivoting mirror device for causing a reflecting surface to pivot about pivotal axes parallel to the reflecting surface under the influence of electrical control signals, more particularly destined for both radially and tangentially following the information track of a rotating optically readable video disc with the aid of a light spot produced by a light source, and comprising: a frame, a mirror which relative to the frame is pivotable about the said pivotal axes, which mirror comprises a base with a reflecting surface on one side thereof, supporting means for pivotably supporting the mirror on the frame and comprising a first portion which is connected to the mirror and a second portion which is connected to the frame as well as a third elastically deformable intermediate portion of an elastic plastic, and electromagnetic control means comprising permanent magnets and/or electrical coils, characterized in that said third portion of the supporting means comprises a substantially rotation-symmetrical bellows body, which comprises at least one fold which is concentric with the optical center of the reflecting surface.
Claim 2
Dependent Claim
177 words
An electromagnetically controllable pivoting mirror device for causing a reflecting surface to pivot about pivotal axes parallel to the reflecting surface under the influence of electrical control signals, more particularly destined for both radially and tangentially following the information track of a rotating optically readable video disc with the aid of a light spot produced by a light source, and comprising: a frame, a mirror which relative to the frame is pivotable about the said pivotal axes, which mirror comprises a base with a reflecting surface on one side thereof, supporting means for pivotably supporting the mirror on the frame and comprising a first portion which is connected to the mirror and a second portion which is connected to the frame as well as a third elastically deformable intermediate portion of an elastic plastic, and electromagnetic control means comprising permanent magnets and/or electrical coils, characterized in that said third portion of the supporting means comprises a substantially rotation-symmetrical bellows body, which comprises at least one fold which is concentric with the optical center of the reflecting surface.
Claim 3
Dependent Claim
94 words
A pivoting mirror device as claimed in claim 1, with a supporting means which is integrally manufactured from an elastic plastic, characterized in that said first portion, which is connected to the mirror, comprises a substantially disc-shaped body, the second portion, which is connected to the frame, substantially comprises a ring which is concentric with the disc, but which is axially shifted relative thereto, and the third portion comprises a cylindrical casing which at its one side adjoins the ring and at its other side via the concentric fold(s) adjoins the substantially disc-shaped body.
References Cited (Backward Citations)
CH354117A
Cited
GB1393896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |