Day-night prism display device
Abstract
Abstract AN INDICATING DEVICE INCLUDING AN OPEN-ENDED OUTER HOUSING WITH LIGHT PRODUCING MEANS WITHIN THE HOUSING. A CAP IS AXIALLY MOVABLE WITHIN THE HOUSING AND COVERS THE LIGHT PRODUCING MEANS. THERE ARE INDICIA BANDS ALONG THE INNER SIDES OF THE HOUSING AND A REFLECTING SURFACE ADJACENT EACH OF THE INDICIA BANDS FOR DIRECTING INTERIOR LIGHT TO THE INDICIA. THE MOVABLE CAP IS TRANSPARENT AND INCLUDES PRISM AREAS. THE INDICIA BANDS ARE ILLUMINATED BOTH FROM THE INTERIOR LIGHT SOURCE AND FROM AMBINET LIGHT PASSING THROUGH THE TRANSPARENT CAP. IN ONE POSITION OF THE CAP THE INDICIA BANDS WILL BE VISIBLE AT THE EXTERIOR OF THE CAP WHICH IS THE IMAGE SURFACE OF THE PRISM AREA. IN THE SECOND POSITION OF THE CAP. IN WHICH IT IS POSITIONED AWAY FROM THE INDICIA BANDS, THERE WILL BE NO INDICIA DIPLAYED AT THE CAP OUTER SURFACE.
Inventors
- 👤 James C Alexander
- 👤 Peter J Van Benschoten
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |