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Patent Agency Ranking
公开(公告)号：DE69129648T2
公开(公告)日：1998-12-10
申请号：DE69129648
申请日：1991-09-27
Applicant: XEROX CORP
Inventor： BRANDKAMP WARREN F , CLARK FREDERICK B , HARDAWAY CARL
IPC: G03B27/54 , G03B27/72 , G03G15/04 , G03G15/043 , G05D23/19 , H04N1/04 , H05B41/36 , H01J61/52 , G03G15/00
Abstract: The invention relates to a fluorescent lamp assembly and, in particular, to a fluorescent lamp utilized in a document scanning system which is environmentally and thermally stabilized by means of a bifurcated heater control assembly. A heater blanket is wrapped around the entire surface of the lamp including the end areas surrounding the filaments (66, 68) but exclusive of the aperture through which light is emitted. The size and temperature of the lamp cold spot are selected emperically to maximize output power and minimize illumination transients during power on. The heater jacket has thermostat control set points (82, 84, 86, 88) which, in both the lamp standby and energized states, maintain the blanket and lamp assembly at a constant elevated temperature which is above that achieved by lamp heat alone. Since the temperature distribution is always determined by the blanket and never by the lamp, changes in temperature or temperature distribution (and hence illumination distribution) as the lamp transitions from standby to full on are minimized.
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公开(公告)号：CA2048825A1
公开(公告)日：1992-03-29
申请号：CA2048825
申请日：1991-08-08
Applicant: XEROX CORP
Inventor： BRANDKAMP WARREN F , CLARK FREDERICK B , HARDAWAY CARL
Abstract: The invention relates to a fluorescent lamp assembly and, in particular, to a fluorescent lamp utilized in a document scanning system which is environmentally and thermally stabilized by means of a bifurcated heater control assembly. A heater blanket is wrapped around the entire surface of the lamp including the end areas surrounding the filaments (66, 68) but exclusive of the aperture through which light is emitted. The size and temperature of the lamp cold spot are selected emperically to maximize output power and minimize illumination transients during power on. The heater jacket has thermostat control set points (82, 84, 86, 88) which, in both the lamp standby and energized states, maintain the blanket and lamp assembly at a constant elevated temperature which is above that achieved by lamp heat alone. Since the temperature distribution is always determined by the blanket and never by the lamp, changes in temperature or temperature distribution (and hence illumination distribution) as the lamp transitions from standby to full on are minimized.
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公开(公告)号：CA2048825C
公开(公告)日：1997-04-29
申请号：CA2048825
申请日：1991-08-08
Applicant: XEROX CORP
Inventor： BRANDKAMP WARREN F , CLARK FREDERICK B , HARDAWAY CARL
Abstract: A fluorescent lamp utilized in a document scanning system is environmentally and thermally stabilized by means of a bifurcated heater control assembly. A heater blanket is wrapped around the entire surface of the lamp including the end areas surrounding the filaments but exclusive of the aperture through which light is emitted. The size and temperature of the lamp cold spot are selected emperically to maximize output power and minimize illumination transients during power on. The heater jacket has thermostat control set points which, in both the lamp standby and energized states, maintain the blanket and lamp assembly at a constant elevated temperature which is above that achieved by lamp heat alone. Since the temperature distribution is always determined by the blanket and never by the lamp, changes in temperature or temperature distribution (and hence illumination distribution) as the lamp transitions from standby to full on are minimized.
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公开(公告)号：BR9705889A
公开(公告)日：1999-05-04
申请号：BR9705889
申请日：1997-11-25
Applicant: XEROX CORP
Inventor： WEBB DOUGLAS E , CLARK FREDERICK B , PRATT JAMES L , BUCH DOUGLAS W , CAROLAN KEVIN M
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公开(公告)号：DE69129648D1
公开(公告)日：1998-07-30
申请号：DE69129648
申请日：1991-09-27
Applicant: XEROX CORP
Inventor： BRANDKAMP WARREN F , CLARK FREDERICK B , HARDAWAY CARL
IPC: G03B27/54 , G03B27/72 , G03G15/04 , G03G15/043 , G05D23/19 , H04N1/04 , H05B41/36 , H01J61/52 , G03G15/00
Abstract: The invention relates to a fluorescent lamp assembly and, in particular, to a fluorescent lamp utilized in a document scanning system which is environmentally and thermally stabilized by means of a bifurcated heater control assembly. A heater blanket is wrapped around the entire surface of the lamp including the end areas surrounding the filaments (66, 68) but exclusive of the aperture through which light is emitted. The size and temperature of the lamp cold spot are selected emperically to maximize output power and minimize illumination transients during power on. The heater jacket has thermostat control set points (82, 84, 86, 88) which, in both the lamp standby and energized states, maintain the blanket and lamp assembly at a constant elevated temperature which is above that achieved by lamp heat alone. Since the temperature distribution is always determined by the blanket and never by the lamp, changes in temperature or temperature distribution (and hence illumination distribution) as the lamp transitions from standby to full on are minimized.
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