US4365232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency lighting unit
Assignee: United States Department of the Navy
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Filing: 1981-03-23
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Granted: 1982-12-21
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Expires: 2001-03-23
Abstract
Abstract An emergency lighting unit having a electroluminescent lamp is provided forse in locating an aircraft exit. The emergency lighting unit contains a battery and an inverter for converting DC battery current to high frequency alternating current required for illumination of the electroluminescent lamp. Various means are provided for automatically lighting the lamp during a distress situation. The lighting unit is configured to serve as a handle for use in leaving a disabled aircraft.
Inventors
- 👤 George R. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:18
CPC Classifications
G; G08; G08B; G08B7/00; G08B7/06; G08B7/062; B; B60; B60Q; B60Q3/00; B60Q3/20; B60Q3/267; B60Q3/40; B60Q3/41; B60Q3/46; B60Q3/47; B60Q3/80; B64; B64D; B64D47/00; B64D47/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
74 words
In an aircraft, at least one emergency lighting unit mounted to a bulkhead by standoff brackets to serve as an evacuation light and a handle, said lighting unit comprising, a casing formed by a flat metallic heat sink and a translucent cover, an electroluminescent lamp fixed to said translucent cover, alternating current means within said casing for illuminating said electroluminescent lamp, and circuit means for connecting said alternating current means to said electroluminescent lamp.
Claim 2
Dependent Claim
74 words
In an aircraft, at least one emergency lighting unit mounted to a bulkhead by standoff brackets to serve as an evacuation light and a handle, said lighting unit comprising, a casing formed by a flat metallic heat sink and a translucent cover, an electroluminescent lamp fixed to said translucent cover, alternating current means within said casing for illuminating said electroluminescent lamp, and circuit means for connecting said alternating current means to said electroluminescent lamp.
Claim 3
Dependent Claim
33 words
An emergency lighting unit as set forth in claim 1 wherein said alternating current means includes a battery and an inverter for converting DC current from said battery to high frequency alternating current.
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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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |