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EP0056505B1 - Appareil d'éclairage chirurgical à mise au point électrique - Google Patents

Appareil d'éclairage chirurgical à mise au point électrique Download PDF

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Publication number
EP0056505B1
EP0056505B1 EP81300165A EP81300165A EP0056505B1 EP 0056505 B1 EP0056505 B1 EP 0056505B1 EP 81300165 A EP81300165 A EP 81300165A EP 81300165 A EP81300165 A EP 81300165A EP 0056505 B1 EP0056505 B1 EP 0056505B1
Authority
EP
European Patent Office
Prior art keywords
light
reflector
light source
lamp
pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81300165A
Other languages
German (de)
English (en)
Other versions
EP0056505A1 (fr
Inventor
Kenneth J. Fisher
William R. Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Sterilizer Co
Original Assignee
American Sterilizer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Sterilizer Co filed Critical American Sterilizer Co
Priority to AT81300165T priority Critical patent/ATE28503T1/de
Priority to DE8181300165T priority patent/DE3176330D1/de
Priority to EP81300165A priority patent/EP0056505B1/fr
Publication of EP0056505A1 publication Critical patent/EP0056505A1/fr
Application granted granted Critical
Publication of EP0056505B1 publication Critical patent/EP0056505B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/046—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures having multiple lighting devices, e.g. connected to a common ceiling base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/205—Lighting for medical use for operating theatres

Definitions

  • This invention relates to filament type electric lamps and particularly but not exclusively to surgical lamps or lights.
  • a known filament type electric lamp is summarised in the precharacterising portion of Claim 1 and is known from US-A-3 493 806.
  • an incandescent light for use in automobiles including a tubular bulb having a main filament and a dipping filament, the main filament being positioned at the focal point of a single fixed parabolic reflector with corresponding light rays projected as a horizontal beam, the dipping filament being axially spaced from the main filament.
  • Screen means are located on the exterior surface of the bulb so as to prevent those rays from the dipping element which would be reflected upwards, from striking the reflector.
  • the light disclosed herein provides an improvement over the surgical lamp shown and United States Patent No. 4 037 096 and United States Patent No. 4 025 778.
  • the latter patent shows a plurality of lights that are arranged mechanically to change the position of the focus of the lights. This requires complex apparatus and considerable physical effort.
  • the conventional means of accomplishing a change in focus and/or a change in pattern size is by mechanical movement of the bulb relative to the reflector or reflectors of the optical system.
  • the present invention is summarised in the characterising portion of Claim 1.
  • the focus and, therefore, the pattern size can be changed electrically.
  • the light could be switched over to another filament and the surgical procedure continued without having to pause to relamp the light. (In particular, there are some countries that require such standby lighting capability in surgical lighting.)
  • the present invention envisages the use of a bulb with two or more filaments spaced a predetermined controlled distance apart relative to the axis of the optical system. Since two or more filaments can be placed within the lamp, a multiple of patterns can be achieved by expanding the number of lamps.
  • the design allows for dual filament capability in small lamp envelope packing configurations. Previous designs were of the standard incandescent variety, which were bulky and suffered from shortcomings of lumen depreciation and reduced life.
  • the lamps employed herein are the frosted, low voltage type using the multiple filament technology to overcome these negative attributes.
  • the associated small envelope approximates a point source and allows it use in multi-reflective systems offering a greater range in pattern/focus selection.
  • the curvature of the reflector may be parabolic with the filaments located between the reflector and the focal point of the reflector, so that the rays of light come to focus at a finite point.
  • a cluster of lights could contain one or more multi-filament lamps within the cluster. Therefore, by switching to the rearmost filament on the multi-filament lamps and switching off some of the lamps, a small pattern of high intensity can be obtained. By switching to the other filament and switching on additional lamps, a large pattern of high intensity can be formed.
  • This design compares with hitherto multicluster systems which decrease overlap of fixed light projections from the various lamps and hence pattern size by switching off lamps. Consequently intensity is decreased as the pattern becomes smaller.
  • a derivative of this system has applicability to the field of photographic lighting. It is well known that the two principal types of lighting used by photographers are “Flood” and “Spot”. At present, the photographer has to buy two different bulbs for these two applications and change bulbs when the lighting requirements or the subject change.
  • the lamp With the present invention having two light sources displaced a certain distance apart, the lamp can be switched from Spot to Flood and back to Spot again electrically.
  • a means is disclosed of electrically switching a bulb from "Flood” to "Spot” for maximum flexibility in photographic lighting.
  • Fig. 1 shows surgical lights 110 and 110' supported by means of suitable arms on the ceiling of the hospital room to provide adjustment of the position of the light.
  • a surgical table T is shown below the lights on which a patient may be supported which for purposes of illustration, will be considered to be the object on which the light patterns are to be projected.
  • the light switch panel D is supported at any convenient position on the wall near the surgical table where it will be readily accessible to the operator.
  • the lamps in Lights 110 and 110' can be switched to energize all the filaments of the lamps of both Lights 110 and 110', or part of the filaments of each lamp to give a large light pattern, a small light pattern or any combination of large and small light patterns that may suit the particular requirements of the operator.
  • the word surgical light is intended to include dental lamps and lights used in other areas of the health care field.
  • the surgical light 10 shown in Figure 1A has a housing 11 which may be supported on a suitable bracket.
  • the housing 11 supports a first source reflector 12, a lamp 12', second reflector 13 and third reflector 14, the handle 17 is attached to the lamp housing by suitable structure.
  • Source reflector 12 has a focal point 20 and an axis of symmetry 42, which will be understood by those skilled in the art.
  • the filaments which can be any suitable light sources will preferably be spaced from the focal point of reflector 12.
  • the reflector 12,13, and 14 may have a plain reflecting surface, a diffusing type reflector surface or a faceted surface.
  • Lamp 12' contains the first light source 15, the second 16 and could contain three or more light sources.
  • Light source 15 and 16 could be made of any suitable material used for filaments or light generating elements familiar to those skilled in the art and will be referred to herein generally as filaments.
  • the tungsten halogen material has been found to be a desirable type filament because of its compact size, approximating a point source with two or more filaments spaced a controlled distance from each other. It will be noted that the first light source 15 is spaced from the first reflector 12 between reflector 12 and focal point 20 and spaced from the second light source 16. The second filament 16 is shown spaced from the first filament 15 and the focal point 20.
  • the multi-filament lamp 12' may have a frosted glass envelope, to obtain patterns which are free of voids or shadows and preclude filament imaging at the pattern site.
  • a clear lamp may also be employed in conjunction with faceted reflector 12 and/or variable stepped Fresnel lenses to provide the desired diffusion of light.
  • the handle 17 may be a removable, sterilizable handle of a type familiar to those skilled in the art which may be grasped by the hand of the operator to adjust the surgical light to the desired position.
  • first filament 15 of the surgical light of Figure 1A When the first filament 15 of the surgical light of Figure 1A is energized, a typical light ray 26 will be reflected by reflectors 12, 13 and 14 through paths 27, 28 and 29 in a large pattern size onto an object.
  • second filament 16 When second filament 16 is energized, the ray of light from the filament 16 may be reflected through paths 30, 31, 32 and 33 to give a smaller light pattern size on an object. Energizing other filaments could result in an intermediate pattern size, a smaller pattern size or a larger pattern size, thus by energizing the filaments 15 or 16, selectively different pattern sizes of light are obtainable.
  • a surgical light 110 made up of light elements 111, 112, 113, 114,115 and 116 arranged in a circle and supported on frame 117 by brackets 118 supported on yoke 119 which may be attached to a suitable supporting surface such as a wall W or ceiling C above a surgical table T.
  • the table T may support an object such as a patient P.
  • Each of the lights 111 through 116 has a reflector 120.
  • Reflectors 120 are concave and have a focal point 121 in accordance with good lighting practice.
  • Lenses 122 are provided which may be frosted, clear or color corrected.
  • Each of the light elements 111 through 116 has a lamp 121 which is shown by way of example as having a plurality of filaments 123, 124 and 125 spaced from each other and spaced from the focal point 126.
  • Each of the light elements 111 through 116 could have two or more filaments and they are shown with these filaments by way of example only.
  • the filaments 123 and 124 are spaced from the focal point and from the reflector a different distance along the axis of symmetry 142 and the reflectors 120 are so directed that when the filaments 124 are energized, the light is directed into a relatively small pattern 128 on the object T at a relatively high intensity. Only part of the filaments 124 need be energized when the small pattern size is desired because the pattern size being smaller only a portion of the light is required to result in the same pattern intensity.
  • the filaments 123 of the lights When the filaments 123 of the lights are energized by closing switch S2, they direct light onto an object in a relatively large pattern, indicated at 127, and in order to provide a higher intensity pattern of light over the large pattern area 127, other filaments of lamps may be energized by closing switch S3 for example.
  • any suitable number of light elements can be provided in the surgical light 110, and the light elements 111 through 116 can be supported in any practical configuration or any practical number of lights can be used, in any desired pattern each light in the array having several filaments and each light reflector aimed at the same area on an article on a surgical support, each of the light elements 111 through 116 being arranged about the axis of symmetry 142.
  • the lights can be used for flood lights, dental lights, photography lights or under application requiring variable focus or variable pattern size.
  • the dual filament lamp can be utilized in a multilamp arrangement with other single or multi filament lamps to provide pattern size variation from a large diameter flood effect to a smaller diameter spot effect.
  • a combination flood/spot capability exists to provide large pattern exposure with secondary spot lighting simultaneously. In such a manner, large surface incisions can be lighted while also providing depth of illumination into smaller surgical cavities. Any variation from total flood or total spot to flood/spot combination can be performed by selective electrical energization of the proper filaments.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Surgical Instruments (AREA)
  • Materials For Medical Uses (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (5)

1. Lampe électrique du type à filament (10) comprenant
un moyen de réflexion (12, 13, 14) comprenant un premier réflecteur (12) ayant une configuration concave avec un point focal (20) et un axe de symétrie (42),
un moyen formant source de lumière comprenant une première source de lumière (15) et une seconde source de lumière (16);
un moyen supportant ladite première source de lumière et ladite seconde source de lumière sur ledit axe de symétrie et à des distances prédéterminées dudit premier réflecteur et en relation espacée l'une avec l'autre, une source de lumière étant placée plus près dudit premier réflecteur que l'autre et en relation espacée avec ledit premier réflecteur et au moins l'une desdites sources de lumière étant supportée à une distance prédéterminée dudit point focal; et
un moyen pour exciter sélectivement ladite première source de lumière et ladite seconde source de lumière;
caractérisée en ce que ledit moyen de réflexion comprend de plus un second réflecteur (13) et un troisième réflecteur (14); ledit premier réflecteur (12) étant disposé pour diriger la lumière de ladite source de lumière (15, 16) vers ledit second réflecteur (13), ledit second réflecteur (13) étant disposé pour diriger la lumière dudit premier réflecteur (12) vers ledit troisième réflecteur (14), ledit troisième réflecteur (14) étant disposé pour diriger la lumière sur un objet pour qu'ainsi un motif relativement petit de lumière ou un motif relativement grand de lumière puisse être sélectivement dirigé sur ledit objet par excitation sélective de ladite première ou de ladite seconde source de lumière.
2. Lampe selon la revendication 1 où lesdites sources de lumière comprennent des filaments de tungstène halogéné.
3. Lampe selon la revendication 1 ou 2 où le moyen formant source de lumière comprend trois sources de lumière ou plus.
4. Source de lumière comprenant un ensemble de lampes électriques du type à filament selon l'une quelconque des revendications précédentes.
5. Source de lumière selon la revendication 4, ayant au moins six desdites lampes électriques disposées généralement en un cercle.
EP81300165A 1981-01-15 1981-01-15 Appareil d'éclairage chirurgical à mise au point électrique Expired EP0056505B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT81300165T ATE28503T1 (de) 1981-01-15 1981-01-15 Operationsleuchte mit elektrischer fokussierung.
DE8181300165T DE3176330D1 (en) 1981-01-15 1981-01-15 Electrically focused surgical light
EP81300165A EP0056505B1 (fr) 1981-01-15 1981-01-15 Appareil d'éclairage chirurgical à mise au point électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81300165A EP0056505B1 (fr) 1981-01-15 1981-01-15 Appareil d'éclairage chirurgical à mise au point électrique

Publications (2)

Publication Number Publication Date
EP0056505A1 EP0056505A1 (fr) 1982-07-28
EP0056505B1 true EP0056505B1 (fr) 1987-07-22

Family

ID=8188186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300165A Expired EP0056505B1 (fr) 1981-01-15 1981-01-15 Appareil d'éclairage chirurgical à mise au point électrique

Country Status (3)

Country Link
EP (1) EP0056505B1 (fr)
AT (1) ATE28503T1 (fr)
DE (1) DE3176330D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE365295T1 (de) * 2004-02-28 2007-07-15 Trumpf Kreuzer Med Sys Gmbh Operationsleuchte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005194A (en) * 1932-12-01 1935-06-18 Walter R Armstrong Headlight lamp
GB704409A (en) * 1951-10-18 1954-02-24 Gen Electric Co Ltd Improvements in or relating to lighting fittings
US2896066A (en) * 1956-06-21 1959-07-21 Quetin Emmanuel Lighting apparatus for dental surgeries
NL6603641A (fr) * 1966-03-19 1967-09-20
US4037096A (en) * 1974-08-09 1977-07-19 American Sterilizer Company Illuminator apparatus using optical reflective methods
JPS51139190A (en) * 1975-05-28 1976-12-01 Yamada Iryo Shomei Kk Apparatus of focusing an enclosed multi-lamp type astral lamp

Also Published As

Publication number Publication date
EP0056505A1 (fr) 1982-07-28
DE3176330D1 (en) 1987-08-27
ATE28503T1 (de) 1987-08-15

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