Means for removing glare op a light beam
Abstract
Abstract A SEALED-BEAM HEADLAMP INCLUDES A COAXIAL LENS AND REFLECTOR, AND AN INCANDESCENT FILAMENT HICH GENERATES A LIGHT SOURCE. A TRANSPARENT PLATE IS INTERPOSED BETWEEN THE FILAMENT AND THE LENS TO DIVIDE THE HEADLAMP INTO A HERMETICALLY SEALED, EVACUATED FILAMENT COMPARTMENT AND A NON-EVACUATED LOUVER COMPARTMENT. A FRAME WHICH IS FIXEDLY MOUNTED IN THE LOUVER COMPARTMENT IS MAINTAINED STATIONARY WITH RESPECT TO THE LENS AND THE PLATE. A PLURALITY OF LOUVERS ARE ROTATABLY MOUNTED IN THE FRAME, THE LOUVERS BEING SPACED-APART AND MECHANICALLY COUPLED FOR SIMULTANEOUS ROTATION SEQUENTIALLY THROUGH A FULLY CLOSED POSITION AND A FULLY OPEN POSITION. A DRIVE MECHANISM COOPERATES WITH THE LOUVERS COUPLING TO ROTATE THE LOUVERS IN UNISON AT SUCH RATE THAT A BEAM OF LIGHT PASSING THROUGH THE HEADLAMP LENS APPEARS UNINTERRUPTED. ALTERNATIVELY, THE LOUVERS MAY BE MOUNTED FOR OSCILLATION RATHER THAN ROTATION OR A SUITABLE LOUVER COUPLING DEVICE MAY BE PROVIDED TO ROTATE ADJACENT LOUVERS IN OPPOSITE DIRECTIONS.
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Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |