US4937715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp system for operating theatres and the like
Assignee: Kirschner Medical Corp
•
Filing: 1989-01-26
•
Granted: 1990-06-26
•
Expires: 2009-01-26
Abstract
Abstract The present invention relates to a lamp for providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising generally (a) a light source, (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, outwardly curved prisms, and (c) a toroidal lens system which controls the divergence of the light emanating from the light source so as to render the light substantially columnate and direct the light onto the planar field. The present invention also includes structure whereby the radial sectors are held together in the planar field by attachment to one another, such as by tongue-and-groove means, and further includes (d) a transparent member located between the planar field and the area to be illuminated which protects the prism sectors from soil and injury.
Inventors
- 👤 Donald C. O'Shea
- 👤 James L. Oliver
- 👤 James L. Sketo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
F; F21; F21V; F21V5/00; F21W; F21W2131/00; F21W2131/20; F21W2131/205; Y; Y10; Y10S; Y10S362/00; Y10S362/804
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, outwardly curved prisms; and (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar field.
Claim 2
Dependent Claim
72 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, outwardly curved prisms; and (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar field.
Claim 3
Dependent Claim
45 words
The lamp according to claim 1 wherein the curvature of said transverse, outwardly curved prisms varies such that the curvature of the prisms toward the center of said planar field is greater than the curvature of the prisms toward the outside of said planar field.
Claim 4
Dependent Claim
55 words
The lamp according to claim 1 wherein the curvature of said transverse, outwardly curved prisms varies such that, from the innermost prism, the curvature of each prism in the sequence from the inside of said sector to the outside of said sector is less than the curvature of a prism preceding it in said sequence.
Claim 5
Dependent Claim
56 words
The lamp according to claim 1 wherein the curvature of said transverse, outwardly curved prisms varies such that, from the innermost prism, the curvature of each prism in the sequence from the inside of said sector to the outside of said sector is less than the curvature of the prism immediately preceding it in said sequence.
Claim 6
Dependent Claim
22 words
The lamp according to claim 1 wherein said radial sectors are held together in said planar field by attachment to one another.
Claim 7
Dependent Claim
30 words
The lamp according to claim 5 wherein said radial sectors are held together in said planar field by cooperation of tongue-and-groove means on the lateral sides of said radial sectors.
Claim 8
Dependent Claim
26 words
The lamp according to claim 1 wherein said lamp further comprises: (d) a transparent member located between said planar field and said area to be illuminated.
Claim 9
Dependent Claim
123 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, outwardly curved prisms, wherein the curvature of said transverse, outwardly curved prisms varies such that, from the innermost prism, the curvature of each prism in the sequence from the inside of said sector to the outside of said sector is less than the curvature of the prism immediately preceding it in said sequence; and (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar, circular field.
Claim 10
Dependent Claim
123 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, outwardly curved prisms, wherein the curvature of said transverse, outwardly curved prisms varies such that, from the innermost prism, the curvature of each prism in the sequence from the inside of said sector to the outside of said sector is less than the curvature of the prism immediately preceding it in said sequence; and (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar, circular field.
Claim 11
Dependent Claim
98 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, curved prisms, wherein the curvatures of a substantial number of said prisms vary from one another so as to allow divergence, in the angular direction, of light rays passing therethrough; (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar field.
Claim 12
Dependent Claim
98 words
A lamp providing uniform luminosity in an area to be illuminated, such as in an operating theatre and the like, comprising: (a) a light source; (b) a planar field, said planar field comprising a substantial number of radial sectors containing a plurality of transverse, curved prisms, wherein the curvatures of a substantial number of said prisms vary from one another so as to allow divergence, in the angular direction, of light rays passing therethrough; (c) a toroidal lens system which renders the light emanating from said light source substantially columnar and directs said light onto said planar field.
References Cited (Backward Citations)
USRE24372E
Cited
US24372A
Cited
US1276924A
Cited
US1122409A
Cited
US1180748A
Cited
US1263696A
Cited
US1235674A
Cited
US1364866A
Cited
US1420977A
Cited
US1374900A
Cited
US1569217A
Cited
US1541706A
Cited
US1724727A
Cited
US1709218A
Cited
US1839022A
Cited
US2017075A
Cited
GB420922A
Cited
US2082100A
Cited
US2089693A
Cited
US2201860A
Cited
US2175067A
Cited
US2260693A
Cited
US2310810A
Cited
US2328329A
Cited
US2344295A
Cited
US2495320A
Cited
US2493087A
Cited
US2827554A
Cited
US3020395A
Cited
US3179796A
Cited
US3225184A
Cited
US3360640A
Cited
US3274383A
Cited
US3340393A
Cited
US3320415A
Cited
FR1495007A
Cited
US3502865A
Cited
US3732417A
Cited
US3941993A
Cited
US4153929A
Cited
US4159511A
Cited
US4135231A
Cited
US4633377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |