US4455508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure mercury vapor discharge lamp
Assignee: US Philips Corp
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Filing: 1981-08-21
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Granted: 1984-06-19
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Expires: 2001-08-21
Abstract
Abstract Low-pressure mercury vapor discharge lamp having an electrical stabilization ballast 10 which occupies a central position in the lamp. The discharge vessel surrounds the ballast. In order to dissipate the heat generated by the ballast during operation to the environment of the lamp, a thin-walled heat sink of a heat-conductive material which bears on the ballast is provided between the ballast and the discharge vessel, this body having a collar which extends as far as the exterior of the lamp.
Inventors
- 👤 Gustaaf A. Wesselink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:55
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/52
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel in which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel and said thin walled member consisting of aluminium.
Claim 2
Dependent Claim
129 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel in which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel and said thin walled member consisting of aluminium.
Claim 3
Dependent Claim
29 words
A low-pressure mercury vapor discharge lamp as claimed in claim 1 wherein an electrically insulating layer is provided between the wall of said thin walled member and said ballast.
Claim 4
Dependent Claim
134 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said disclosure vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, at least a portion of said member or said collar facing the discharge vessel is provided with a reflecting layer.
Claim 5
Dependent Claim
134 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said disclosure vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, at least a portion of said member or said collar facing the discharge vessel is provided with a reflecting layer.
Claim 6
Dependent Claim
140 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel and at least a portion of said member or said collar facing the discharge vessel being provided with a reflecting layer.
Claim 7
Dependent Claim
140 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel and at least a portion of said member or said collar facing the discharge vessel being provided with a reflecting layer.
Claim 8
Dependent Claim
147 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel, said thin walled member consisting of aluminum, and at least a portion of said member or said collar facing the discharge vessel being provided with a reflecting layer.
Claim 9
Dependent Claim
147 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said collar engaging said discharge vessel, said thin walled member consisting of aluminum, and at least a portion of said member or said collar facing the discharge vessel being provided with a reflecting layer.
Claim 10
Dependent Claim
140 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being so shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said discharge vessel having a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix.
Claim 11
Dependent Claim
140 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being so shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said discharge vessel having a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix.
Claim 12
Dependent Claim
145 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said discharge vessel having a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix, said collar engaging said discharge vessel.
Claim 13
Dependent Claim
145 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member, said discharge vessel having a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix, said collar engaging said discharge vessel.
Claim 14
Dependent Claim
147 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member. said thin walled member consisting of aluminum, and said discharge vessel has a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix.
Claim 15
Dependent Claim
147 words
A low-pressure mercury vapor discharge lamp which comprises: an electric stabilization ballast; a discharge vessel which is closed in a vacuum-tight manner and which encloses electrodes between which a discharge is present during operation of the lamp, said discharge vessel containing mercury and a rare gas, said discharge vessel being shaped and dimensioned so that the discharge path is curved in one or more places; a thin-walled member of a heat conductive material disposed in heat conducting relation with a major portion of the outer surface of said ballast, substantially all of said member being intermediate said ballast and said discharge vessel; and a heat conducting collar extending from said thin walled member. said thin walled member consisting of aluminum, and said discharge vessel has a projecting appendix containing an amalgam, a wall portion of said collar being dimensioned and configured to bear on said projecting appendix.
Claim 16
Dependent Claim
25 words
A low-pressure mercury vapor discharge lamp as claimed in claim 8, wherein said collar includes a pellet of aluminum foil which bears on said appendix.
Claim 17
Dependent Claim
25 words
A low-pressure mercury vapor discharge lamp as claimed in claim 9, wherein said collar includes a pellet of aluminum foil which bears on said appendix.
Claim 18
Dependent Claim
25 words
A low-pressure mercury vapor discharge lamp as claimed in claim 10, wherein said collar includes a pellet of aluminum foil which bears on said appendix.
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |