Patent US3978361A successfully refreshed from Google Patents.
US3978361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light source device
Assignee: Ushio Denki KK
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Filing: 1975-08-22
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Granted: 1976-08-31
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Expires: 1995-08-22
Abstract
Abstract A light source device having an elongated baffle plate positioned between a light source and a cooling means for regulating a cooling flow from said cooling means. Said baffle plate has a slit and bent portions extending for covering said light source so that the bulb wall of the light source is evenly cooled.
Inventors
- 👤 Tatsumi Hiramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; H; H01; H01J; H01J61/00; H01J61/02; H01J61/52; F21V29/56; G; G03; G03F; G03F7/00; G03F7/16; H01J61/12; H01J61/18; H01J61/20; H01J61/523
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A light source device comprising an elongated box-shaped house, a cooling means provided on the back wall of said house, a gutter-shaped reflex mirror having a throat, a tubular elongated light source arranged within and along the axis of said house, and an elongated baffle plate positioned in parallel to and between said light source and said mirror, wherein said baffle plate has a slit arranged along its longitudinal axis and bent portions extending for covering said light source.
Claim 2
Dependent Claim
79 words
A light source device comprising an elongated box-shaped house, a cooling means provided on the back wall of said house, a gutter-shaped reflex mirror having a throat, a tubular elongated light source arranged within and along the axis of said house, and an elongated baffle plate positioned in parallel to and between said light source and said mirror, wherein said baffle plate has a slit arranged along its longitudinal axis and bent portions extending for covering said light source.
Claim 3
Dependent Claim
27 words
A device as claimed in claim 1, wherein said light source is a tubular elongated mercury-arc lamp energized more than 90 watt per 1 cm of arc.
Claim 4
Dependent Claim
25 words
A device as claimed in claim 1, wherein said baffle plate has the narrowest slit at the center and the largest at the opposite ends.
Claim 5
Dependent Claim
24 words
A device as claimed in claim 1, wherein said mirror has the narrowest throat at the center and the largest at the opposite ends.
References Cited (Backward Citations)
US3120928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |