US3772506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating lamp provided with a light pipe
Assignee: Original Hanau Quarzlampen GmbH
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Filing: 1972-07-06
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Granted: 1973-11-13
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Expires: 1992-07-06
Abstract
Abstract A lamp arrangement for medical operating rooms. Light from a point source is focused by a spheroidal reflector on the inlet end of a light pipe, which transmits it to a reflector arrangement below. In one embodiment a straight light pipe is employed with a stepped prismatic element to direct the light upward onto a stepped reflector. In an alternate embodiment a curved light pipe is employed to transmit the light directly onto a parabolic reflector. The light rays leaving the final reflector in both embodiments are parallel and of uniform intensity.
Inventors
- 👤 K Junginger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/0008; F21V7/0025; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/0008; F21W; F21W2131/00; F21W2131/20; F21W2131/205; Y; Y10; Y10S; Y10S385/00; Y10S385/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
In an operating lamp having a light pipe for the low loss transmission of light from a light source to an operating area, the the improvements characterized by: a. a first reflector optically cooperable with the light source, b. a reflector arrangement including a second, graduated reflector disposed below the first reflector and above an operating area, and having an inner part and an outer part which is offset from it, c. the light pipe being arranged to transmit light collected from the source by the first reflector to the reflector arrangement, and d. means for reversing the direction of the light before it impinges on the second reflector comprising a prismatic element having at least two inclined sides offset from one another in the form of saw teeth.
Claim 2
Dependent Claim
129 words
In an operating lamp having a light pipe for the low loss transmission of light from a light source to an operating area, the the improvements characterized by: a. a first reflector optically cooperable with the light source, b. a reflector arrangement including a second, graduated reflector disposed below the first reflector and above an operating area, and having an inner part and an outer part which is offset from it, c. the light pipe being arranged to transmit light collected from the source by the first reflector to the reflector arrangement, and d. means for reversing the direction of the light before it impinges on the second reflector comprising a prismatic element having at least two inclined sides offset from one another in the form of saw teeth.
Claim 3
Dependent Claim
35 words
An operating lamp according to claim 1, wherein the light pipe passes cenrally through the graduated reflector and is in the form of a glass rod in which the rays are transmitted by total reflection.
Claim 4
Dependent Claim
37 words
An operating lamp according to claim 2, wherein the glass rod inlet is located in the immediate proximity of the focusing point of the first reflector, and the glass rod outlet is spaced from the prismatic element.
Claim 5
Dependent Claim
30 words
An operating lamp according to claim 3, wherein the prismatic element has a reflecting surface to reflect the beams of light issuing from the glass rod onto the graduated reflector.
Claim 6
Dependent Claim
76 words
An operating lamp according to claim 4, wherein the geometry of the prismatic element and the graduated reflector are such that the inner sides of the prismatic element refLect the light rays onto the inner part of the graduated reflector surrounding the glass rod, the outer sides reflect the light rays onto the offset part of the graduated reflector, and the graduated reflector parts reflect the light in parallel in the direction of the operating area.
Claim 7
Dependent Claim
118 words
In an operating lamp having a light pipe for the low loss transmission of light from a light source to an operating area, the improvements characterized by: a. a first reflector optically cooperable with the light source, b. a reflector arrangement including a second, parabolic reflector disposed below the first reflector and above an operating area, c. the light pipe being a flexible fiberglass pipe having one end positioned to receive light collected from the source by the first reflector and the other end positioned at the focal point of the parabolic reflector to transmit the collected light thereto, the light pipe being curved to reverse the direction of the light before it impinges on the parabolic reflector.
Claim 8
Dependent Claim
118 words
In an operating lamp having a light pipe for the low loss transmission of light from a light source to an operating area, the improvements characterized by: a. a first reflector optically cooperable with the light source, b. a reflector arrangement including a second, parabolic reflector disposed below the first reflector and above an operating area, c. the light pipe being a flexible fiberglass pipe having one end positioned to receive light collected from the source by the first reflector and the other end positioned at the focal point of the parabolic reflector to transmit the collected light thereto, the light pipe being curved to reverse the direction of the light before it impinges on the parabolic reflector.
Claim 9
Dependent Claim
59 words
An operating lamp according to claim 6, wherein the fiber glass pipe forms a question mark an S-shaped half loop with vertical end sections, the light inlet and outlet faces of which are horizontal and parallel to one another, the lower end section being curved in the direction of the upper end section and in alignment with the same.
Claim 10
Dependent Claim
27 words
An operating lamp according to claim 7, wherein a common perpendicular line at the two end faces of the fiber glass pipe passes through the light source.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |