Patent US3601600A successfully refreshed from Google Patents.
US3601600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting unit
Assignee: CANNON PRODUCTS Inc
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Filing: 1970-03-23
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Granted: 1971-08-24
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Expires: 1990-03-23
Abstract
Abstract A lighting unit including a ''''half shade'''' assembly mounted for oscillation about an axis at or near the center of curvature of the shade and in which a receptacle for an electrically energized lamp is carried within the shade assembly for movement therewith. A feature of the disclosure is stop means for limiting the oscillatory movement of the shade assembly to just under 360*, the stop means comprising an element fixed with respect to the axis of oscillation of the shade assembly and having a protuberance, and an element moving with said shade assembly and having a peripherally-narrow region of its radially-inner surface disposed to interfere with the protuberance at points separated from each other by approximately 350* of shade assembly oscillation.
Inventors
- 👤 William P Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:50
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/002; F21V; F21V21/00; F21V21/14; F21V21/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A lighting unit including a standard having a region of circular cross section, a shade formed to provide a generally arcuate portion and a subtending portion, means fixed relative to said subtending portion and engaging said standard region, at a point close to the center of curvature of said arcuate portion, to support said shade from said standard for oscillation about the axis of said standard portion, and a lamp receptacle supported within said shade for movement therewith about said axis.
Claim 2
Dependent Claim
81 words
A lighting unit including a standard having a region of circular cross section, a shade formed to provide a generally arcuate portion and a subtending portion, means fixed relative to said subtending portion and engaging said standard region, at a point close to the center of curvature of said arcuate portion, to support said shade from said standard for oscillation about the axis of said standard portion, and a lamp receptacle supported within said shade for movement therewith about said axis.
Claim 3
Dependent Claim
17 words
The lighting unit of claim 1 in which said point substantially coincides with said center of curvature.
Claim 4
Dependent Claim
19 words
The lighting unit of claim 1 in which said point is slightly offset outwardly from said center of curvature.
Claim 5
Dependent Claim
19 words
The lighting unit of claim 1 in which said point is slightly offset inwardly from said center of curvature.
Claim 6
Dependent Claim
35 words
The lighTing unit of claim 1 including means on said standard region and cooperative with said means which is fixed relative to said subtending portion to limit oscillation of said shade to less than 360*.
Claim 7
Dependent Claim
41 words
The lighting unit of claim 1 in which said means includes a wall portion which is eccentric relative to said axis, said standard being provided with a means for interfering with said wall portion to limit oscillatory movement of said shade.
Claim 8
Dependent Claim
43 words
The lighting unit of claim 1, including a radially outward protuberance on said standard, said means including a wall which is eccentric relative to said axis, said wall including a portion disposed to interfere with said protuberance to limit movement of said shade.
Claim 9
Dependent Claim
20 words
The lighting unit of claim 5 in which said cooperative means permits substantially 350* of oscillatory movement of said shade.
Claim 10
Dependent Claim
38 words
The lighting unit of claim 7 in which said wall is part-cylindrical upon an axis parallel with, but offset relative to, the axis of said standard-region, the magnitude of such offset being such as to produce such interference.
Claim 11
Dependent Claim
118 words
The lighting unit of claim 1 in which said means is a bracket formed to provide a floor and an arcuate wall upstanding from said floor, said floor being formed with an opening penetrated by said circular region of said standard, means on said standard engaging said bracket floor to support said bracket, a collar on said standard above said floor to restrain said bracket against movement away from said support means, said collar having a generally radially outward protuberance, and the center of curvature of said bracket wall being offset relative to the axis of said circular standard region whereby said protuberance will interfere with said wall to limit oscillatory movement of said shade about said axis.
Claim 12
Dependent Claim
97 words
The lighting unit of claim 10 in which said circular region of said standard is threaded, said bracket supporting means is a nut threadedly mounted on said region, an antifriction washer supported on said nut and engaged by the outer surface of said floor, a second antifriction washer supported on the inner surface of said floor, said collar being a nut threaded on said region above said floor and bearing on said second washer, and said protuberance being defined by a setscrew transaxially penetrating said last-named nut to engage said standard and protruding outwardly from said nut.
Claim 13
Dependent Claim
38 words
The lighting of claim 1 including a base, said standard being supported from said base with the axis of said circular region of said standard disposed substantially in the vertical plane which includes an edge of said base.
Claim 14
Dependent Claim
39 words
The lighting unit of claim 1 including a base, said standard being supported from said base with the axis of said circular region of said standard disposed substantially in the vertical plane which includes an edge of said base.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |