Patent US4931685A successfully refreshed from Google Patents.
US4931685A
Expired / Lapsed
US
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Discharge lamp
Assignee: Toshiba Corp
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Filing: 1988-08-19
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Granted: 1990-06-05
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Expires: 2008-08-19
Abstract
Abstract A discharge lamp includes a bulb in which a pair of electrodes are installed and mercury and a rear gas are sealed. A heater unit is tightly attached to the outer surface of the bulb by a heat-shrinkable tube fitted over the bulb. The heater unit includes a thin flexible heater for heating the bulb to promote the evaporation of the mercury, and a pair of film members fixed on both sides of the heater so as to reinforce the heater.
Inventors
- 👤 Yoshitomi Dobashi
- 👤 Rikio Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:34
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/52
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
116 words
A discharge lamp comprising: a bulb having an inner surface on which a phosphor layer is formed and an electrode installed inside, said bulb containing mercury and a rare gas therein; a heater unit, attached to the outer surface of the bulb and extending in the axial direction of the bulb for heating the bulb to promote the evaporation of the mercury contained, said heater unit having a thin flexible heater and a film member prefixed at least on one side of the heater to reinforce the heater; and covering means fitted over the outer surface of the bulb to enclose the heater unit, for fixing the heater unit to the outer surface of the bulb.
Claim 2
Dependent Claim
116 words
A discharge lamp comprising: a bulb having an inner surface on which a phosphor layer is formed and an electrode installed inside, said bulb containing mercury and a rare gas therein; a heater unit, attached to the outer surface of the bulb and extending in the axial direction of the bulb for heating the bulb to promote the evaporation of the mercury contained, said heater unit having a thin flexible heater and a film member prefixed at least on one side of the heater to reinforce the heater; and covering means fitted over the outer surface of the bulb to enclose the heater unit, for fixing the heater unit to the outer surface of the bulb.
Claim 3
Dependent Claim
25 words
A discharge lamp according to claim 1, wherein said heater unit has a pair of film members which hold the heater from both sides thereof.
Claim 4
Dependent Claim
17 words
A discharge lamp according to claim 1, wherein said film member is formed of a heat-resistant resin.
Claim 5
Dependent Claim
18 words
A discharge lamp according to claim 1, wherein said film member is formed of an electrically insulating resin.
Claim 6
Dependent Claim
17 words
A discharge lamp according to claim 1, wherein said film member is formed of a light-permeable resin.
Claim 7
Dependent Claim
44 words
A discharge lamp according to claim 1, wherein said film member is formed of a metal foil which acts as a reflecting film for the bulb, with at least one of the heater and the film member being covered with an electrical insulation coating.
Claim 8
Dependent Claim
27 words
A discharge lamp according to claim 1, wherein said heater unit is formed in a band shape and extends over substantially the full length of the bulb.
Claim 9
Dependent Claim
29 words
A discharge lamp according to claim 1, wherein said heater is formed in a mesh and has a width substantially the same as the outer diameter of the bulb.
Claim 10
Dependent Claim
114 words
A discharge lamp comprising: a bulb having an inner surface on which a phosphor layer is formed and an electrode installed inside, said bulb containing mercury and a rare gas; a heater unit, attached to an outer surface of the bulb and extending in an axial direction of the bulb, for heating the bulb to promote evaporation of the mercury therein, said heater unit having a thin flexible heater and a pair of film members fixed to both sides of the heater to reinforce the heater; and covering means fit over the outer surface of the bulb to enclose the heater unit, for fixing the heater unit to the outer surface of the bulb.
Claim 11
Dependent Claim
114 words
A discharge lamp comprising: a bulb having an inner surface on which a phosphor layer is formed and an electrode installed inside, said bulb containing mercury and a rare gas; a heater unit, attached to an outer surface of the bulb and extending in an axial direction of the bulb, for heating the bulb to promote evaporation of the mercury therein, said heater unit having a thin flexible heater and a pair of film members fixed to both sides of the heater to reinforce the heater; and covering means fit over the outer surface of the bulb to enclose the heater unit, for fixing the heater unit to the outer surface of the bulb.
Claim 12
Dependent Claim
26 words
A discharge lamp according to claim 9, wherein said film members are formed of a resin film and thermally fused together with the heater placed therebetween.
Claim 13
Dependent Claim
16 words
A discharge lamp according to claim 9, wherein said covering means has a light-permeable resin tube.
Claim 14
Dependent Claim
15 words
A discharge lamp according to claim 11, wherein said resin tube is a heat-shrinkable tube.
Claim 15
Dependent Claim
49 words
A discharge lamp according to claim 9, wherein said covering means includes a pair of light-permeable resin films, the resin films being fitted over the bulb from two sides of the bulb and side ends of one resin film are joined with side ends of the other resin film.
Claim 16
Dependent Claim
36 words
A discharge lamp according to claim 9, wherein said covering means includes a light-permeable resin film, the resin film being wrapped around the outer surface of the bulb and having side ends joined with each other.
Claim 17
Dependent Claim
29 words
A discharge lamp according to claim 9, wherein said bulb is formed in a substantially circle and has a pair of opposed ends spaced apart by a specified distance.
Claim 18
Dependent Claim
34 words
A discharge lamp according to claim 9, which further comprises a sensor for detecting the temperature of the bulb, the sensor being fixed to the outer surface of the bulb by the covering means.
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |