US3639751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally dissipative enclosure for portable high-intensity illuminating device
Assignee: PICHEL IND Inc
•
Filing: 1970-04-10
•
Granted: 1972-02-01
•
Expires: 1990-04-10
Abstract
Abstract A sealed, thermally dissipative enclosure for a portable highintensity illuminating device is disclosed. The enclosure includes a housing shell having an exterior surface equipped with a plurality of outwardly extending fins and which is configured to form a cavity. A reflector having a specular mirrorlike surface is situated in the cavity of the housing shell. An aperture, extending through the housing shell and the reflector and generally aligned along the longitudinal axis of the enclosure, is provided to accommodate a light source. A cupshaped receptacle is included to provide a lamp socket, or other power connection, and to seal the aperture by having a portion thereof secured to the shell housing. The cavity is sealed by a faceplate which is securely retained in the mouth of the cavity. The dissipation of thermal energy is facilitated by positioning the reflector, in the cavity of the housing shell, to obtain optimal transfer of thermal energy from within the enclosure through the housing shell to the surrounding atmosphere.
Inventors
- 👤 Marlowe A Pichel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:29
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/74; F21V29/77; F21V29/773; F21S; F21S8/00; F21S8/003; F21V29/75; F21V29/76; F21V29/767; F21V29/502; F21V29/505
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
202 words
A thermally dissipative, sealed enclosure for a hand-held illuminating device accommodating an arc lamp having an elongate shape and a pair of longitudinally aligned electrical terminals said enclosure comprising: a housing shell including a closed wall configured to form a cavity having an open-mouthed portion and a base aperture, and a plurality of outwardly extending fins spacedly formed on said closed wall for effectively increasing the exterior surface area of said housing shell; a thermally conductive receptacle having a cuplike configuration forming a closed portion and an open portion, said receptacle being secured to said housing shell for sealing said base aperture, said receptacle serving as a radio frequency insulator; a thermally conductive faceplate secured to said housing shell for sealing said open-mouthed portion; a thermally conductive reflector having a configuration conforming to said cavity and positioned in said cavity to facilitate the transfer of thermal energy, generated in said cavity by said source of radiant energy, to said housing shell; and a thermally conductive spider support member including one or more elongate legs having one end thereof secured at the openmouthed portion of said housing shell and another end thereof mutually secured to support an electrical terminal of said arc lamp.
Claim 2
Dependent Claim
202 words
A thermally dissipative, sealed enclosure for a hand-held illuminating device accommodating an arc lamp having an elongate shape and a pair of longitudinally aligned electrical terminals said enclosure comprising: a housing shell including a closed wall configured to form a cavity having an open-mouthed portion and a base aperture, and a plurality of outwardly extending fins spacedly formed on said closed wall for effectively increasing the exterior surface area of said housing shell; a thermally conductive receptacle having a cuplike configuration forming a closed portion and an open portion, said receptacle being secured to said housing shell for sealing said base aperture, said receptacle serving as a radio frequency insulator; a thermally conductive faceplate secured to said housing shell for sealing said open-mouthed portion; a thermally conductive reflector having a configuration conforming to said cavity and positioned in said cavity to facilitate the transfer of thermal energy, generated in said cavity by said source of radiant energy, to said housing shell; and a thermally conductive spider support member including one or more elongate legs having one end thereof secured at the openmouthed portion of said housing shell and another end thereof mutually secured to support an electrical terminal of said arc lamp.
Claim 3
Dependent Claim
48 words
The apparatus defined by claim 1 wherein said wall of said housing shell includes an interior surface, said apparatus further including a filler material sandwiched between said interior surface and said reflector, said filler material being adapted to provide thermal conduction between said reflector and said housing shell.
Claim 4
Dependent Claim
16 words
The apparatus defined by claim 2 wherein said filler material includes particles of thermally conductive material.
Claim 5
Dependent Claim
28 words
The apparatus defined by claim 3 wherein said outwardly extending fins are elongate and longitudinally extend across the exterior surface of said closed wall of said housing shell.
Claim 6
Dependent Claim
34 words
The apparatus defined by claim 3 wherein said outwardly extending fins are a series of protruding rings longitudinally distributed across the length of the exterior surface of said closed wall of said housing shell.
Claim 7
Dependent Claim
41 words
The apparatus defined by claim 1 wherein said wall of said housing shell includes an interior surface, and wherein said reflector is mounted a predetermined distance from said interior surface for providing a channel between said interior surface and said reflector.
Claim 8
Dependent Claim
33 words
The apparatus defined by claim 6 wherein said receptacle includes a portion thereof that is partially enclosed by said housing shell, said partially enclosed portion of said receptacle including a plurality of apertures.
Claim 9
Dependent Claim
28 words
The apparatus defined by claim 7 wherein said outwardly extending fins are elongate and longitudinally extend across the exterior surface of said closed wall of said housing shell.
Claim 10
Dependent Claim
34 words
The apparatus defined by claim 7 wherein said outwardly extending fins are a series of protruding rings longitudinally distributed across the length of the exterior surface of said closed wall of said housing shell.
References Cited (Backward Citations)
US1494134A
Cited
GB386538A
Cited
FR884136A
Cited
US2817069A
Cited
US2703374A
Cited
AT182785B
Cited
US2884513A
Cited
US3018365A
Cited
GB928966A
Cited
US3361903A
Cited
US3379868A
Cited
US3371202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |