US3588488A - High kelvin surgical lighting fixture - Google Patents
High kelvin surgical lighting fixture Download PDFInfo
- Publication number
- US3588488A US3588488A US833375A US3588488DA US3588488A US 3588488 A US3588488 A US 3588488A US 833375 A US833375 A US 833375A US 3588488D A US3588488D A US 3588488DA US 3588488 A US3588488 A US 3588488A
- Authority
- US
- United States
- Prior art keywords
- lamp
- fixture
- surgical
- color temperature
- lighting fixture
- 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 - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/804—Surgical or dental spotlight
Definitions
- the proper lighting of surgical operating sites in addition to requiring certain levels of illumination, also require that the light source approach as closely as possible the color of average daylight in order for the surgeon to be able to more clearly and readily discern the tissues, organs and blood of the atient.
- the optimum lighting conditions for an operating site require that there be no dense shadows to prevent the surgeon from seeing past his own hands and surgical instruments and to prevent him from adequately seeing the patients tissue, organs and blood as they actually exist; since the examination, diagnosis and treatment of these organs may be related to the color or change of color of the particular organ.
- color temperature relates to the color of a completely radiating black body source and of correlated light sources whose spectral outputs match such a source.
- Most tungsten filament lamps approach the energy distribution of a black body quite closely with the color temperature varying with the current passing through them.
- prior art devices varied the voltage across such a lamp and/or added filtering means to obtain a color temperature up to approximately 4,000 K., which is, of course, 2,500 below the ideal color clarity of 6,500 K.
- a second consideration in the design of a surgical operating light relates to the physical discomfort of those under the light.
- a properly designed fixture requires that minimum amounts of heat energy reach the open wound and also the back of the surgeon's head and neck. The surgeon must be able to work for hours, if necessary, without heat discomfort. In addition, the patients tissue must not be excessively dried or damaged by lamp heat.
- Yet another object of the invention is to provide a new and novel surgical lamp which is capable of being positioned within certain predetermined distances from the operating surgeon without giving off undesirable heat which would prove discomforting to the operating surgeons, and damaging to the patient.
- a further object of the invention is to provide a new and novel surgical lamp having a pivotally mounted dichroic reflector positioned on the lamp housing to allow quick access to the interior of the surgical lamp and for replacement of the light source.
- an individual lamp fixture assembly comprising a housing having a forward, light transmitting face, a centrally mounted, rearwardly extending lamp and a dichroic reflector carried by the rear edge of the housing.
- a filter element Surrounding the lamp is a filter element.
- the filter element and dichroic reflector cooperate in the manner more fully described below to raise the color temperature from 3,000" K. to about 6,000 K. while directing undesired wave lengths of light away from the operating area.
- the lamp fixture of this invention produces high intensity, high Kelvin light with minimum heat transmitted to the field of illumination.
- the fixture of the invention may be used singly or in groups such as, for example, in groups of six whereby high intensity light, about 5,000 foot candles, having color temperatures approaching daylight can be provided for surgical purposes while maintaining the temperature within established safety comfort levels for patient and surgeon.
- the lighting fixture of this invention either singly or in groups, light of suitable color temperature and intensity can be obtained without the necessity of exceeding the rated voltage of the lamp and in many cases can be operated below the rated voltage of the lamp thereby extending the service life of the lamp.
- FIG. 2 is a cross-sectional view of the fixture viewed through line 2-2 of FIG. 1.
- the lamp 14 is mounted in a lamp socket 16 in such a manner so as to direct a major portion of its illumination rearwardly towards reflector 44.
- the light source 14 is connected to an electrical power supply by means of the electrical terminals l8.
- a cup guard 20 Surrounding the lamp 14 and lamp socket 16 is a cup guard 20 which is positioned in the central portion of the fixture 10 by means of the cantilevered arms 22 and 22 rigidly fastened to the housing 12 by suitable means, such as by bolts 24. Socket 16 is maintained in proper position within cup guard 20 by means of leg 21 so that at least a portion of the illuminating portion of lamp 14 extends beyond cup guard 20.
- the forward edge 11 of the annular housing 12 carries cover plate 26 which is mounted by suitable means such as between a bent portion of edge 11 and clips 28.
- the cover plate 26 serves to seal the interior of the surgical lamp 10 from the outside environment.
- the cover plate 26 may be preferably formed of a textured material, such as a suitable plastic, which will permit the front reflected illumination to pass through the cover plate.
- cup guard 20 terminates with radially outwardly extending flange 30 upon which is positioned a removable baffle plate 32 having a plurality of louvers 34.
- the baffle plate 32 contains a central aperture 36 which is positioned over the lamp socket 16 so that lamp 14 will extend therethrough when placed in socket l6.
- Adjacent the closed bottom of the cup guard 20 are a multiplicity of openings 38 which serve as the means of ingress of air into the cup guard for circulating around the lamp 14 and lamp socket 16 thereby preventing overheating of the lamp and seal during operation.
- the circulating air passes upwardly to the baffle plate 32 and through the louvers 34 and central aperture 36 and egresses upwardly away from the light source 14.
- the baffle plate 32 with louvers 34 serves to allow the circulating air to egress upwardly while preventing heat energy from the light source 14 from passing downwardly to the lamp seal area.
- the cup guard 20 and the baffle plate 32 thusly described serve as the means for cooling the lamp seal by permitting circulating air around said light and socket.
- reflector 44 which is formed of suitable translucent material.
- Inner surface 45 of reflector 44 is provided with a multilayer dichroic coating which reflects a major portion of the spectrum but which allows rays of infrared wave lengths to pass through the coating and subsequently through reflector 44.
- Dichroic coatings and the principles of operation are well understood in the art and per se do not form a part of this invention.
- filter element 42 and dichroic reflector 44 serves to raise the color temperature of the light emanating from lamp 14 from about 3,000 K. to about 6,000" K. for the illumination emanating from the fixture of this in vention.
- the heat producing infrared rays are transmitted rearwardly through reflector 44 and are thus directed away from the area of illumination.
- the dichroic reflector 44 is pivotally mounted by means of a pair of hinges 46 positioned on the interior of the housing 12.
- the hinges 46 are pivotally connected to the ring 48 which is rigidly fastened to a portion of the rim 50 of the dichroic reflector 44.
- the ring 48 is latched to the housing 12 by means of the latch clip 52 mounted internally in the housing 12.
- the fixture of this invention may be used individually or, when higher illumination is desired, in groups. it is unnecessary when using a group of fixtures to enclose the grouped fixtures in any additional housing.
- a group of fixtures which at design voltage combine to produce a total illumination of about 5,000 foot candles with a color temperature of approximately 6,000 K.
- a surgeon operating under illumination provided by fixtures of this invention is able to operate for a maximum length of time without physical discomfort caused by heat from the surgical operating lamps since a maximum amount of heat energy generated by the lamp is transmitted rearwardly away from the surgeon while at the same time the illumination provided is of high color temperature, close to that of average daylight, allowing him to better discern tissue, and the like, color.
- a lighting fixture for producing high color temperature illumination with low heat transmission comprising an annular housing member having a forward edge and a rear edge, mounting means carried by said housing member for mounting a lamp socket at substantially the axis of rotation of said housing member, said socket being positioned so that a lamp mounted therein directs a major portion of its illumination radially rearwardly of said housing member, el ectncal means connecting said socket and a source of electricity,
- said mounting means comprises at least one arm affixed at its outer end to said housing member and extending radially inwardly therefrom, an annular clamp afiixed at the inner end of said arm, a cylindrically shaped cup guard having a closed end and an open end held by said annular clamp and coaxially aligned with the axis of said housing member, the closed end of said cup guard facing the forward portion of said lighting fixture and being adapted for mounting said socket so that the illuminating portion of a lamp mounted in said socket extends rearwardly through the open end of said cup guard.
- said filter element comprises a tubular-shaped member carried by said louvered plate and said flange of said cup guard radially surrounding the illuminating portion of a lamp in said socket, said filter element being constructed of transparent material capable of filtering certain light rays whereby the color temperature of at least a portion of the light emanating from the lamp during operation is corrected from about 3,000 K. to about 3,500 K.
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83337569A | 1969-06-16 | 1969-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3588488A true US3588488A (en) | 1971-06-28 |
Family
ID=25264259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US833375A Expired - Lifetime US3588488A (en) | 1969-06-16 | 1969-06-16 | High kelvin surgical lighting fixture |
Country Status (4)
Country | Link |
---|---|
US (1) | US3588488A (en) |
DE (1) | DE2023625A1 (en) |
FR (1) | FR2052676A5 (en) |
GB (1) | GB1250590A (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196460A (en) * | 1978-07-14 | 1980-04-01 | Sybron Corporation | Major surgical light |
US4213170A (en) * | 1978-02-06 | 1980-07-15 | Gte Sylvania Incorporated | Reflector lamp with lens having light-modifying coating |
US4254455A (en) * | 1979-12-21 | 1981-03-03 | Pelton & Crane Company | Reflector for dental, medical or the like lighting device |
US4254454A (en) * | 1979-12-21 | 1981-03-03 | Pelton & Crane Company | Self-ventilating dental lighting device |
US4344118A (en) * | 1979-03-20 | 1982-08-10 | Studsvik Energiteknik Ab | Lamp device for underwater use |
US4719545A (en) * | 1986-06-13 | 1988-01-12 | Cano Victor M | Source light for cameramen, lighting technicians, set lighting for motion pictures, stage and television |
US4897772A (en) * | 1987-12-25 | 1990-01-30 | G-C Dental Industrial Corp. | Dental astral lamp |
US4912613A (en) * | 1989-02-27 | 1990-03-27 | Mdt Corporation | Cover lens for light |
US5055988A (en) * | 1990-03-02 | 1991-10-08 | Schroer Manufacturing Company | Surgery lamp with ventilation for cooling |
US5059146A (en) * | 1990-02-22 | 1991-10-22 | Welch Allyn, Inc. | Method of adjusting a light source for color temperature and chromaticity |
US5183328A (en) * | 1991-12-09 | 1993-02-02 | General Electric Company | Luminaire having an improved thermal management arrangement |
US6511209B1 (en) * | 2001-10-02 | 2003-01-28 | Albert C. L. Chiang | Lighting fixture |
US20050117348A1 (en) * | 2002-05-06 | 2005-06-02 | Bruno Baiardi | Light beam projector with filter set rotating on its own axis |
US20050195601A1 (en) * | 2004-02-28 | 2005-09-08 | Rudolf Marka | Operating table lamp |
US20050231945A1 (en) * | 2004-02-28 | 2005-10-20 | Berthold Leibinger | Operating table lamp |
US20070138966A1 (en) * | 2005-11-14 | 2007-06-21 | Trumpf Kreuzer Medizin Systeme Gmbh + Co. Kg | Lamp power tabulation |
US7367688B1 (en) * | 2003-02-17 | 2008-05-06 | King Of Fans, Inc. | Outdoor lighting lamp with water-resistant cover |
US20080137362A1 (en) * | 2004-11-02 | 2008-06-12 | John Gjettermann | Lighting Device Having at Least Two Optical Systems |
US20080285820A1 (en) * | 2007-05-15 | 2008-11-20 | Trumpf Kreuzer Medizin Systeme Gmbh + Co. Kg | Operating system having an operating lamp and a camera |
US7488090B1 (en) | 2008-01-24 | 2009-02-10 | Chien Luen Industries Co., Ltd., Inc. | Outdoor lighting lamp with water-resistant cover |
US20090122536A1 (en) * | 2005-08-02 | 2009-05-14 | Berchtold Holding Gmbh | Operational lamp |
US20100073930A1 (en) * | 2008-09-23 | 2010-03-25 | Lsi Industries, Inc. | Lighting Apparatus with Heat Dissipation System |
EP2060847B1 (en) | 2007-11-15 | 2016-07-20 | Frowein EZH GmbH | Operating light |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4695930A (en) * | 1985-10-03 | 1987-09-22 | Gte Products Corporation | Infrared floodlight assembly |
CA1300107C (en) * | 1988-09-30 | 1992-05-05 | Donald I. Gonser | Miniature hand-held spot source of illumination |
DE8903947U1 (en) * | 1989-03-31 | 1990-10-18 | Heraeus Instruments Gmbh, 6450 Hanau, De | |
JP3179931B2 (en) * | 1992-10-27 | 2001-06-25 | 保土谷化学工業株式会社 | Car seat dyes and car seat dyes |
US6443596B1 (en) | 1998-03-27 | 2002-09-03 | Hill-Rom Services, Inc. | Surgical light apparatus with improved cooling |
-
1969
- 1969-06-16 US US833375A patent/US3588488A/en not_active Expired - Lifetime
-
1970
- 1970-05-12 GB GB1250590D patent/GB1250590A/en not_active Expired
- 1970-05-14 DE DE19702023625 patent/DE2023625A1/de active Pending
- 1970-06-16 FR FR7022151A patent/FR2052676A5/fr not_active Expired
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213170A (en) * | 1978-02-06 | 1980-07-15 | Gte Sylvania Incorporated | Reflector lamp with lens having light-modifying coating |
US4196460A (en) * | 1978-07-14 | 1980-04-01 | Sybron Corporation | Major surgical light |
US4344118A (en) * | 1979-03-20 | 1982-08-10 | Studsvik Energiteknik Ab | Lamp device for underwater use |
US4254455A (en) * | 1979-12-21 | 1981-03-03 | Pelton & Crane Company | Reflector for dental, medical or the like lighting device |
US4254454A (en) * | 1979-12-21 | 1981-03-03 | Pelton & Crane Company | Self-ventilating dental lighting device |
US4719545A (en) * | 1986-06-13 | 1988-01-12 | Cano Victor M | Source light for cameramen, lighting technicians, set lighting for motion pictures, stage and television |
US4897772A (en) * | 1987-12-25 | 1990-01-30 | G-C Dental Industrial Corp. | Dental astral lamp |
US4912613A (en) * | 1989-02-27 | 1990-03-27 | Mdt Corporation | Cover lens for light |
US5059146A (en) * | 1990-02-22 | 1991-10-22 | Welch Allyn, Inc. | Method of adjusting a light source for color temperature and chromaticity |
US5055988A (en) * | 1990-03-02 | 1991-10-08 | Schroer Manufacturing Company | Surgery lamp with ventilation for cooling |
US5183328A (en) * | 1991-12-09 | 1993-02-02 | General Electric Company | Luminaire having an improved thermal management arrangement |
US6511209B1 (en) * | 2001-10-02 | 2003-01-28 | Albert C. L. Chiang | Lighting fixture |
US20050117348A1 (en) * | 2002-05-06 | 2005-06-02 | Bruno Baiardi | Light beam projector with filter set rotating on its own axis |
US7331692B2 (en) * | 2002-05-06 | 2008-02-19 | Bruno Baiardi | Light beam projector with filter set rotating on its own axis |
US7367688B1 (en) * | 2003-02-17 | 2008-05-06 | King Of Fans, Inc. | Outdoor lighting lamp with water-resistant cover |
US7311410B2 (en) | 2004-02-28 | 2007-12-25 | Trumpf Kreuzer Medizin Systeme Gmbh + Co. Kg | Operating table lamp |
US20050231945A1 (en) * | 2004-02-28 | 2005-10-20 | Berthold Leibinger | Operating table lamp |
US20050195601A1 (en) * | 2004-02-28 | 2005-09-08 | Rudolf Marka | Operating table lamp |
US7614763B2 (en) * | 2004-02-28 | 2009-11-10 | Trumpf Medizin Systeme Gmbh + Co. Kg | Operating table lamp |
US20080137362A1 (en) * | 2004-11-02 | 2008-06-12 | John Gjettermann | Lighting Device Having at Least Two Optical Systems |
US20090122536A1 (en) * | 2005-08-02 | 2009-05-14 | Berchtold Holding Gmbh | Operational lamp |
US20070138966A1 (en) * | 2005-11-14 | 2007-06-21 | Trumpf Kreuzer Medizin Systeme Gmbh + Co. Kg | Lamp power tabulation |
US8134309B2 (en) | 2005-11-14 | 2012-03-13 | Trumpf Medizin Systeme Gmbh + Co. Kg | Lamp power tabulation |
US8300906B2 (en) | 2007-05-15 | 2012-10-30 | Trumpf Medizin Systeme Gmbh + Co. Kg | Operating system having an operating lamp and a camera |
US20080285820A1 (en) * | 2007-05-15 | 2008-11-20 | Trumpf Kreuzer Medizin Systeme Gmbh + Co. Kg | Operating system having an operating lamp and a camera |
EP2060847B1 (en) | 2007-11-15 | 2016-07-20 | Frowein EZH GmbH | Operating light |
US7488090B1 (en) | 2008-01-24 | 2009-02-10 | Chien Luen Industries Co., Ltd., Inc. | Outdoor lighting lamp with water-resistant cover |
US20100073930A1 (en) * | 2008-09-23 | 2010-03-25 | Lsi Industries, Inc. | Lighting Apparatus with Heat Dissipation System |
US8382334B2 (en) | 2008-09-23 | 2013-02-26 | Lsi Industries, Inc. | Lighting apparatus with heat dissipation system |
US8480264B2 (en) | 2008-09-23 | 2013-07-09 | Lsi Industries, Inc. | Lighting apparatus with heat dissipation system |
US8696171B2 (en) | 2008-09-23 | 2014-04-15 | Lsi Industries, Inc. | Lighting apparatus with heat dissipation system |
US8215799B2 (en) * | 2008-09-23 | 2012-07-10 | Lsi Industries, Inc. | Lighting apparatus with heat dissipation system |
Also Published As
Publication number | Publication date |
---|---|
DE2023625A1 (en) | 1970-12-23 |
GB1250590A (en) | 1971-10-20 |
FR2052676A5 (en) | 1971-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3588488A (en) | High kelvin surgical lighting fixture | |
US4135231A (en) | Surgical light assembly | |
US5072349A (en) | Lighting device for surgical and medical uses | |
US3775606A (en) | Fiber-optic light console | |
US4380794A (en) | Surgical lamp characterized by having an improved reflector | |
US3930149A (en) | Variable intensity dental light | |
JP2002509454A (en) | Ophthalmic microsurgery system | |
EP1064494B8 (en) | Surgical light apparatus with improved cooling | |
US2494058A (en) | Lighting unit | |
US3626170A (en) | Dental or surgical operating light | |
US20100210918A1 (en) | Task light | |
US2026156A (en) | Medical examination lamp | |
US1927181A (en) | Surgical light | |
JP3084178U (en) | Surgical light | |
US2651301A (en) | Headlamp for physicians and surgeons | |
CN210462641U (en) | Oral cavity lamp | |
CN213746327U (en) | Shadowless lamp for operation | |
US1963279A (en) | Operating lamp | |
CN213513511U (en) | LED shadowless lamp for operating room | |
CN205504569U (en) | OLED dental surgery light | |
CN220119330U (en) | Operation shadowless lamp | |
KR101201283B1 (en) | Lighting system for Diagnostic and Therapeutic of Dental surgery | |
US1893773A (en) | Surgical head lamp | |
US3194230A (en) | Medical examination lamp provided with variable focusing means | |
CN213665842U (en) | Neurosurgery is with disposable simple and easy aseptic lighting apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SC ACQUISITION CORP., NO. 1, A NEVADA CORP., STATE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SYBRON CORPORATION;REEL/FRAME:004607/0079 Effective date: 19860711 Owner name: SC ACQUISITION CORP., NO. 1, A NEVADA CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SYBRON CORPORATION;REEL/FRAME:004607/0079 Effective date: 19860711 |
|
AS | Assignment |
Owner name: CASTLE COMPANY Free format text: CHANGE OF NAME;ASSIGNOR:SC ACQUISITION CORP. NO. 1;REEL/FRAME:004741/0707 Effective date: 19860725 |
|
AS | Assignment |
Owner name: SANTA BARBARA RESEARCH CENTER, GOLETA, CA., A CA C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CASTLE COMPANY;REEL/FRAME:005036/0117 Effective date: 19890221 Owner name: MDT CORPORATION, A DE CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CASTLE COMPANY;REEL/FRAME:005036/0117 Effective date: 19890221 |