US3693530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated fluorescent tube fixture
Assignee: Individual
•
Filing: 1971-12-29
•
Granted: 1972-09-26
•
Expires: 1991-12-29
Abstract
Abstract A fluorescent tube fixture having passages for ventilating air in which the passage for supply air is partitioned from the tubes and blows the fresh air across the outer surface of the lens to cool the same, and the passage for exhaust air includes the casing of the fixture so that the exhaust air flows past the fluorescent tubes in the casing.
Inventors
- 👤 Birger Larkfeldt
- 👤 Rolf Petersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:56
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0088; F21V33/0092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
A ventilated fluorescent tube fixture for the ceiling of a room having a ventilation system comprising a box-shaped casing, which includes holding and connecting means for a number of fluorescent tubes, an antiglare device in the form of a lighttransmissive and light-distributing lens substantially closing the opening of the casing, ventilation means partitioned from said tubes for feeding supply air directly through said casing to the room, and exhaust means for taking into the casing of the fixture stale ventilation air as exhaust air from the room and directing the exhaust air through the casing past said tubes for the removal of excess heat and for cooling the fluorescent tubes, including an evacuation opening connected to the ventilation system for the room, characterized in that the ventilation means for the supply air to the room comprises at least one slot having a guide surface to cause the supply air to sweep and cool the outer surface of the lens and to continue out into the room for subsequent collection by the exhaust means For the stale ventilation air.
Claim 2
Dependent Claim
178 words
A ventilated fluorescent tube fixture for the ceiling of a room having a ventilation system comprising a box-shaped casing, which includes holding and connecting means for a number of fluorescent tubes, an antiglare device in the form of a lighttransmissive and light-distributing lens substantially closing the opening of the casing, ventilation means partitioned from said tubes for feeding supply air directly through said casing to the room, and exhaust means for taking into the casing of the fixture stale ventilation air as exhaust air from the room and directing the exhaust air through the casing past said tubes for the removal of excess heat and for cooling the fluorescent tubes, including an evacuation opening connected to the ventilation system for the room, characterized in that the ventilation means for the supply air to the room comprises at least one slot having a guide surface to cause the supply air to sweep and cool the outer surface of the lens and to continue out into the room for subsequent collection by the exhaust means For the stale ventilation air.
Claim 3
Dependent Claim
35 words
An arrangement according to claim 1, characterized in that the supply air slot is located along at least one lateral edge of the casing, the supply air being directed to the center of the lens.
Claim 4
Dependent Claim
67 words
An arrangement according to claim 1, characterized in that the supply air slot is located along a central line of the lens in which slot is mounted a preferably tapered body adapted to be lifted and lowered and moved to the side, said body with the edge of the slot forming two guide surfaces for directing the supply air toward two opposed lateral edges of the lens.
Claim 5
Dependent Claim
72 words
An arrangement according to claim 1 intended for a room equipped with an exhaust air vent, characterized in that the fixture is provided with double exhaust air connections, one connection from the exhaust air vent and one connection to the exhaust air ventilation system, whereby said connections and said casing constitute a part of the passageway system for exhaust air from said vent, and that the lens seals completely against the casing.
References Cited (Backward Citations)
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Cited
US2991708A
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US3090434A
Cited
US3065686A
Cited
US3165051A
Cited
US3326112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |