US3780284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp enclosure
Assignee: AT&T Inc
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Filing: 1972-04-04
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Granted: 1973-12-18
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Expires: 1992-04-04
Abstract
Abstract The lamp enclosure comprises a rectangular open-ended casing having an inverted L-shaped flange circumscribing its inside surface adjacent to each end thereof, the lateral leg of each flange extending toward the adjacent end. A domed translucent lens is positioned within each end of the casing, and each lens has an outwardly turned rim around its perimeter that is placed in engagement with the lateral leg of the adjacent flange. A rectangular retaining ring is placed over each rim and fastened to the adjacent flange to hold each lens in place. A lamp holder assembly is pivotally secured to the inside surface of the casing and it includes a latch having a spring-loaded bolt for engaging an opening in a catch plate mounted in juxtaposition therewith, the catch plate having an inclined ramp to the front and back of the opening.
Inventors
- 👤 F Dewhirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:01
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; F; F21; F21V; F21V17/00; G09F13/0418; G09F13/0454; F21Y; F21Y2103/00; G09F13/0472; G09F13/0481
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
224 words
A lamp enclosure comprising: an open-ended casing including a web having a flange circumscribing its inside surface a short distance from the open end of the casing; a lens positioned on the open end of the casing, the outside perimeter of the lens generally conforming to but being smaller than the inside perimeter of the web of the casing whereby permimeter of the lens is accommodated within the web, the outside perimeter of the lens further being larger than the inside perimeter of the flange of the casing whereby the perimeter of the lens is positioned in juxtaposition with the flange, the thickness of the perimeter of the lens and the location of the flange beiNg such that the perimeter of the lens is recessed within the open end of the casing; a retaining ring positioned in engagement with the perimeter of the lens and fastened to the flange of the casing, the outside perimeter of ther retaining ring generally conforming to but being smaller than the inside perimeter of the web and the inside perimeter of the retaining ring being smaller than the outside perimeter of the lens; and a lamp holder assembly pivotally mounted to the inside surface of the web, the assembly including a latch, and a catch mounted to the inside surface of the web in juxtaposition with the latch.
Claim 2
Dependent Claim
224 words
A lamp enclosure comprising: an open-ended casing including a web having a flange circumscribing its inside surface a short distance from the open end of the casing; a lens positioned on the open end of the casing, the outside perimeter of the lens generally conforming to but being smaller than the inside perimeter of the web of the casing whereby permimeter of the lens is accommodated within the web, the outside perimeter of the lens further being larger than the inside perimeter of the flange of the casing whereby the perimeter of the lens is positioned in juxtaposition with the flange, the thickness of the perimeter of the lens and the location of the flange beiNg such that the perimeter of the lens is recessed within the open end of the casing; a retaining ring positioned in engagement with the perimeter of the lens and fastened to the flange of the casing, the outside perimeter of ther retaining ring generally conforming to but being smaller than the inside perimeter of the web and the inside perimeter of the retaining ring being smaller than the outside perimeter of the lens; and a lamp holder assembly pivotally mounted to the inside surface of the web, the assembly including a latch, and a catch mounted to the inside surface of the web in juxtaposition with the latch.
Claim 3
Dependent Claim
72 words
A lamp enclosure as in claim 1 wherein the flange has an upstanding leg extending transversely from the web and a lateral leg extending transversely from the upstanding leg toward the open end of the casing, and the outside perimeter of the retaining ring is larger than the outside perimeter of the lens and includes a lip that encompasses the perimeter of the lens and overlaps the lateral leg of the flange.
Claim 4
Dependent Claim
127 words
A lamp enclosure as in claim 1 wherein the flange has an upstanding leg extending transversely from the web and a lateral leg extending transversely from the upstanding leg toward the open end of the casing, the portion of the lens adjacent to its perimeter engages the lateral leg of the flange, and the outside perimeter of the retaining ring is larger than the outside perimeter of the lens and includes a lip that encompasses the perimeter of the lens and overlaps the lateral leg of the flange, the thickness of the perimeter of the lens, location of the flange, and thickness of the retaining ring being such that the perimeter of the lens and the retaining ring are recessed within the open end of the casing.
Claim 5
Dependent Claim
39 words
A lamp enclosure as in claim 1 wherein the latch includes a spring loaded bolt, and the catch includes a plate having an opening therein for accommodating the bolt and an inclined ramp on either side of the opening.
Claim 6
Dependent Claim
30 words
A lamp enclosure as in claim 4 wherein the bolt has a tapered end and the opening in the plate accommodates a portion of the tapered end of the bolt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |