Patent US3869397A successfully refreshed from Google Patents.
US3215033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for indicator projector
Assignee: US Philips Corp
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Filing: 1962-09-14
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Granted: 1965-11-02
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Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Gozewijn Van Gelder
- 👤 Vervest Wilhelmus Lambertus
- 👤 Vries Hendrik Willem De
- 👤 Kriek Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:02
CPC Classifications
G; G03; G03B; G03B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A SYSTEM FOR CONTROLLING THE MOVEMNT OF A PROJECTED IMAGE ON A SCREEN CREATED BY A LIGHT SOURCE COMPRISING TWO SPACED MIRRORS, DRIVING MEANS FOR ROTATING SAID MIRRORS, ONE OF SAID MIRRORS DIRECTING SAID PROJECTED IMAGE PRODUCED BY SAID LIGHT SOURCE TO THE OTHER MIRROR WHICH IN TURN PROJECTS THE IMAGE ON THE SCREEN, SAID IMAGE BEING MOVED ACROSS SAID SCREEN BY THE ROTATION OF SAID MIRRORS ABOUT THEIR AXES, MEANS COUPLING SID MIRORS TOGETHER WHEREBY THE ROTATION OF EITHER MIRROR IS CORRECTED AS A FUNCTION OF THE ANGULAR POSITION OF THE OTHER MIRROR IN ORDER TO OBTAIN A PRESCRIVED MOVEMENT OF THE IMAGE UPON SAID SCREEN OF A GIVEN SHAPE WHEN SAID OTHER MIRROR ROTATES.
Claim 2
Independent Claim
116 words
A SYSTEM FOR CONTROLLING THE MOVEMNT OF A PROJECTED IMAGE ON A SCREEN CREATED BY A LIGHT SOURCE COMPRISING TWO SPACED MIRRORS, DRIVING MEANS FOR ROTATING SAID MIRRORS, ONE OF SAID MIRRORS DIRECTING SAID PROJECTED IMAGE PRODUCED BY SAID LIGHT SOURCE TO THE OTHER MIRROR WHICH IN TURN PROJECTS THE IMAGE ON THE SCREEN, SAID IMAGE BEING MOVED ACROSS SAID SCREEN BY THE ROTATION OF SAID MIRRORS ABOUT THEIR AXES, MEANS COUPLING SID MIRORS TOGETHER WHEREBY THE ROTATION OF EITHER MIRROR IS CORRECTED AS A FUNCTION OF THE ANGULAR POSITION OF THE OTHER MIRROR IN ORDER TO OBTAIN A PRESCRIVED MOVEMENT OF THE IMAGE UPON SAID SCREEN OF A GIVEN SHAPE WHEN SAID OTHER MIRROR ROTATES.
References Cited (Backward Citations)
US2714199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |