US4219871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High intensity navigation light
Assignee: United States Department of the Navy
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Filing: 1978-05-22
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Granted: 1980-08-26
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Expires: 1998-05-22
Abstract
Abstract A high intensity running light fixture capable of submersion to substantialepths includes tungsten-halogen lamps housed in glass globe sealed to a heat dissipating base. The fixture avoids reduction in light transmittance of the globe by the improvement wherein a finned heat collector is disposed in the upper regions of the globe, with fins in close proximity to the inner surface thereof, and is connected by thermally conductive pillars to the base.
Inventors
- 👤 Herbert Larrimore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:31
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/502; F21V29/506; B; B63; B63B; B63B45/00; B63B45/04; F21V17/00; F21V17/10; F21V17/12; F21V27/00; F21V27/02; F21V29/70; F21V29/74; F21V29/75; F21V29/76; F21V29/763; F21V29/767; F21V31/00; F21V31/005; F21W; F21W2107/00; F21W2107/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A watertight light fixture for use in preventing collision at sea, said light fixture comprising: a rigid metal base member adapted to be mounted on a ship or vessel; a hollow glass globe formed with a closed upper end portion and an open lower end, said globe having light transmissivity characteristics that vary in amount and chromaticity with changes of temperature and which lie in predetermind desired ranges only when the temperature of said globe is below a predetermined temperature; means, cooperating with said globe and said base member, for securing said open end of said globe against said base member in a direct heat transferring relation thereto; incandescent lamp means, disposed within said globe, for emanating light energy including light within said predetermined range of chromaticity; heat collector means, disposed within the upper region of said globe and adjacent to the inner surface of said closed upper end portion of said globe, for extracting thermal energy therefrom; and heat conductor means, connected between said heat collector means and said base member, for transferring said thermal energy to said base member for dissipation to a cooler ambient medium, whereby said globe is maintained below said predetermined temperature.
Claim 2
Dependent Claim
197 words
A watertight light fixture for use in preventing collision at sea, said light fixture comprising: a rigid metal base member adapted to be mounted on a ship or vessel; a hollow glass globe formed with a closed upper end portion and an open lower end, said globe having light transmissivity characteristics that vary in amount and chromaticity with changes of temperature and which lie in predetermind desired ranges only when the temperature of said globe is below a predetermined temperature; means, cooperating with said globe and said base member, for securing said open end of said globe against said base member in a direct heat transferring relation thereto; incandescent lamp means, disposed within said globe, for emanating light energy including light within said predetermined range of chromaticity; heat collector means, disposed within the upper region of said globe and adjacent to the inner surface of said closed upper end portion of said globe, for extracting thermal energy therefrom; and heat conductor means, connected between said heat collector means and said base member, for transferring said thermal energy to said base member for dissipation to a cooler ambient medium, whereby said globe is maintained below said predetermined temperature.
Claim 3
Dependent Claim
66 words
A light fixture as defined in claim 1 and wherein said heat collector means is formed of a rigid, thermally conductive metal and comprises: a horizontal plate portion; a plurality of heat collecting fins extending upwardly from said plate portion, the free edge of each of said fins running in closely spaced relation to said interior surface of said closed upper end portion of said globe.
Claim 4
Dependent Claim
54 words
A light fixture as defined in claim 2, and wherein: said heat conductor means comprises pillar means rigidly supporting said plate portion in spaced relation to said base member, said pillar means being rigidly fixed to said base member; and said incandescent lamp means being disposed between said plate portion and said base member.
Claim 5
Dependent Claim
38 words
A light fixture as defined in claim 3 and further comprising: lamp support means fixed to said pillar means; and lamp socket means mounted on said support means; said incandescent lamp means being mounted in said socket means.
Claim 6
Dependent Claim
40 words
A light fixture as defined in claim 4, and further comprising: reflector means disposed between said plate portion and said lamp support means and operative to redirect a portion of said light energy from said lamp means through said globe.
Claim 7
Dependent Claim
49 words
A light fixture as defined in claim 5, and wherein: said globe comprises an outwardly directed flange around said open end; and said means for securing said open end of said globe to said base member comprises an annular nut surrounding said flange and threadedly engaging said base member.
Claim 8
Dependent Claim
49 words
A light fixture as defined in claim 6, and wherein said base member comprises: external heat radiating fins; an opening for accommodating electrical cable means for energizing said lamp means; and gland means in said opening for effecting a watertight seal between said cable means and said base member.
Claim 9
Dependent Claim
130 words
A navigation light fixture including a heat conductive metal base, a dome-shapted globe of colored glass mounted on said base, and a high intensity incandescent lamp disposed within said globe, wherein the improvement comprises: a heat collector disposed in said globe and adjacent to the inner surface of the upper portion thereof; heat conductive column means supporting said heat collector relative to said base and operative to conduct thermal energy from said collector to said base; and said base comprising heat dissipating fins thereon for effecting transfer of said thermal energy to ambient air, whereby said glass globe is maintained at a temperature below a predetermined temperature above which light of predetermined chromaticity characteristics that is transmitted through said globe from said lamp is reduced below a predetermined critical value.
Claim 10
Dependent Claim
130 words
A navigation light fixture including a heat conductive metal base, a dome-shapted globe of colored glass mounted on said base, and a high intensity incandescent lamp disposed within said globe, wherein the improvement comprises: a heat collector disposed in said globe and adjacent to the inner surface of the upper portion thereof; heat conductive column means supporting said heat collector relative to said base and operative to conduct thermal energy from said collector to said base; and said base comprising heat dissipating fins thereon for effecting transfer of said thermal energy to ambient air, whereby said glass globe is maintained at a temperature below a predetermined temperature above which light of predetermined chromaticity characteristics that is transmitted through said globe from said lamp is reduced below a predetermined critical value.
Claim 11
Dependent Claim
53 words
A navigation light fixture as defined in claim 8, and wherein: said globe comprises a hemispherical upper end wall; and said heat collector comprises a plurality of spaced, parallel fins the peripheries of which are curved to lie in substantially uniformally spaced relation to the inner surface of said hemispherical upper end wall.
Claim 12
Dependent Claim
58 words
A navigation light fixture as defined in claim 9, and further comprising: a nut member comprising a plurality of heat dissipating fins, said nut member securing said globe to said base and operative to conduct thermal energy from the lower portion of said globe to ambient air portion of said globe to ambient air and to said base.
References Cited (Backward Citations)
US1357559A
Cited
US2288345A
Cited
US2295339A
Cited
US3017536A
Cited
US3502858A
Cited
US3949212A
Cited
US3684883A
Cited
US3798441A
Cited
US3936686A
Cited
US4054790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |