Patent US3840735A successfully refreshed from Google Patents.
US3840735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vandal resistant and weatherproof lighting fixture
Assignee: Lightolier Inc
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Filing: 1973-08-06
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Granted: 1974-10-08
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Expires: 1993-08-06
Abstract
Abstract The present invention is directed to a vandal resistant and weatherproof lighting fixture including a pair of shells, respectively a lighting shell carrying a source of light, the lighting shell being adapted to be mounted to a support surface by fastener means accessible through an open mouth portion of the shell, and a diffuser shell adapted to be locked in position in closing relation of the open mouth portion of the light shell, the two shells including complemental fastening and locking means which securely hold the shells together in a manner permitting their separation for replacement of light bulbs, etc., the manner of effecting such separation being not apparent to an individual unfamiliar with the construction of the fixture. The complemental fastening and locking means includes a cam and a follower fastener. A track on the lighting shell also cooperates with a rim on the diffusing shell.
Inventors
- 👤 K Chan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/14; F21V15/00; F21V15/005; F21S; F21S8/00; F21S8/03; F21S8/033; F21S8/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
217 words
A vandal resistant lighting fixture comprising, in combination, a light shell member having a depending open peripheral track portion, including parallel inner and outer side wall portions and a top wall, said inner wall portion of said track portion defining a downwardly facing open mouth, a resilient gasket seated in said track against said top wall, a lighting means supported interiorly of said light shell member, mounting means within said light shell for attaching said shell to an external support, said lighting means and mounting means being accessible only through said mouth portion, a diffuser shell adapted to be secured in sealing relation of said mouth of said light shell and including an upwardly directed rim member, said rim member of said diffuser shell including an upwardly facing terminal lip, said rim member of said diffuser shell being sized to fit in internal nested relation within the track portion of said light shell, said rim being slidable between releasing and locking positions within said track, said rim member and track portion including cooperative cam and follower means positioned to coact responsive to relative sliding movement of said rim within said track to said locking position to urge said lip of said diffuser shell into contact with said gasket and to prevent relative separating movements of said shells.
Claim 2
Dependent Claim
217 words
A vandal resistant lighting fixture comprising, in combination, a light shell member having a depending open peripheral track portion, including parallel inner and outer side wall portions and a top wall, said inner wall portion of said track portion defining a downwardly facing open mouth, a resilient gasket seated in said track against said top wall, a lighting means supported interiorly of said light shell member, mounting means within said light shell for attaching said shell to an external support, said lighting means and mounting means being accessible only through said mouth portion, a diffuser shell adapted to be secured in sealing relation of said mouth of said light shell and including an upwardly directed rim member, said rim member of said diffuser shell including an upwardly facing terminal lip, said rim member of said diffuser shell being sized to fit in internal nested relation within the track portion of said light shell, said rim being slidable between releasing and locking positions within said track, said rim member and track portion including cooperative cam and follower means positioned to coact responsive to relative sliding movement of said rim within said track to said locking position to urge said lip of said diffuser shell into contact with said gasket and to prevent relative separating movements of said shells.
Claim 3
Dependent Claim
47 words
The lighting fixture in accordance with claim 1 in which camouflaged locking means are provided mounted on an external surface of said light shell and shiftable into engagement with said diffuser shell for locking said shells against relative sliding movement from said locking to said releasing position.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 wherein said diffuser shell includes, on the radial outermost surface thereof, a receiver groove, said groove, in the locked position of said shells, being aligned with said camouflaged locking means.
Claim 5
Dependent Claim
79 words
The lighting fixture in accordance with claim 1 wherein said track portion and rim member are circular in horizontal section, said diffuser shell including an annular flange member extending from the inner face of said rim and adapted to be disposed within said track portion, said cam means being defined by inclined portions on said flange and said follower means being defined by projection portions extending radially from said inner wall of said track toward said outer wall thereof.
Claim 6
Dependent Claim
31 words
The apparatus in accordance with claim 4 wherein said flange includes a clearance portion adapted to permit the passage therethrough of said follower portIon upon axial relative movement of said shells.
Claim 7
Dependent Claim
20 words
The device in accordance with claim 5 wherein, in said locking position, said follower portions underlie portions of said flange.
Claim 8
Dependent Claim
17 words
A device in accordance with claim 6 wherein said cam means comprises a portion of said flange.
Claim 9
Dependent Claim
66 words
Apparatus in accordance with claim 1 wherein said track portion and rim are rectangular in horizontal section, the longitudinal extent of said track portion being greater than the longitudinal extent of said rim, whereby limited relative longitudinal movement between said rim and track portion may be effected, said cam and follower means being positioned to be engaged and disengaged responsive to said limited longitudinal relative movement.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |