Patent US3821542A successfully refreshed from Google Patents.
US3821542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible type lighting fixture
Assignee: Kuroi Electric Ind Co
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Filing: 1972-07-20
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Granted: 1974-06-28
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Expires: 1992-07-20
Abstract
Abstract A device consisting of a lamp fixture which may be collapsed in a manner similar to an umbrella during shipment and easily reassembled by reversing the collapsing process. The shade ribs of the lamp move along the main body of the lamp to achieve the collapsed position. In one embodiment the main body portion has a cavity for enclosing at least a portion of the shade covering when the lamp is collapsed.
Inventors
- 👤 M Kitamura
- 👤 K Murakami
- 👤 H Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:33
CPC Classifications
F; F21; F21V; F21V1/00; F21V1/02; F21V1/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
A collapsible lighting fixture which comprises: a. a fixture body having an elongated shape and having first and second end portions; b. a bulb receiving socket attached to said first end portion of said body; c. a plurality of supporting ribs extending radially from said body, each of said supporting ribs having first and second ends, said supporting ribs first ends being pivotally attached to the periphery of said first end portion of said body; a movable ring mounted on the periphery of said body and constructed to slide vertically along a portion of said body; e. a plurality of flexible shade ribs each having first and second end portions and an intermediate portion, said shade ribs extending radially from and pivotally attached at their first end portions to said movable ring, and pivotally attached in their intermediate portions to said second ends of said support ribs; and f. a flexible lamp shade having a center portion and a peripheral portion, said center portion being secured to said movable ring, and said peripheral portion being secured to said second end portion of said shade ribs, g. whereby upon movement of said movable ring in a direction toward said first end portion of said body said shade portion is forced outwardly by the bending force of said flexible shade ribs to occupy a predetermined open shape, and said movable ring will remain in a predetermined dead point along said body and whereby upon movement of said movable ring in a direction toward said second end portion of said body, said shade portion will occupy a predetermined collapsed position.
Claim 2
Dependent Claim
267 words
A collapsible lighting fixture which comprises: a. a fixture body having an elongated shape and having first and second end portions; b. a bulb receiving socket attached to said first end portion of said body; c. a plurality of supporting ribs extending radially from said body, each of said supporting ribs having first and second ends, said supporting ribs first ends being pivotally attached to the periphery of said first end portion of said body; a movable ring mounted on the periphery of said body and constructed to slide vertically along a portion of said body; e. a plurality of flexible shade ribs each having first and second end portions and an intermediate portion, said shade ribs extending radially from and pivotally attached at their first end portions to said movable ring, and pivotally attached in their intermediate portions to said second ends of said support ribs; and f. a flexible lamp shade having a center portion and a peripheral portion, said center portion being secured to said movable ring, and said peripheral portion being secured to said second end portion of said shade ribs, g. whereby upon movement of said movable ring in a direction toward said first end portion of said body said shade portion is forced outwardly by the bending force of said flexible shade ribs to occupy a predetermined open shape, and said movable ring will remain in a predetermined dead point along said body and whereby upon movement of said movable ring in a direction toward said second end portion of said body, said shade portion will occupy a predetermined collapsed position.
Claim 3
Dependent Claim
35 words
The fixture of claim 1 wherein the length of the support ribs is less than or equal to the distance between the connection of the shade ribs to the movable ring and the support ribs.
Claim 4
Dependent Claim
13 words
The fixture of claim 1 wherein said elongated body is cylindrical in shape.
Claim 5
Dependent Claim
41 words
The device of claim 1 and further including a hollow body portion having an inner cavity, said inner cavity constructed so as to contain at least a portion of said shade portion when said collapsible fixture is in its closed position.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |