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公开(公告)号：US3794416A
公开(公告)日：1974-02-26
申请号：US3794416D
申请日：1972-05-22
Applicant: BELL & HOWELL CO
Inventor： JOHNSTON R
IPC: G03B41/10
CPC classification number: G03B41/10
Abstract: Fiducial markings having different relative contrasts are sensed from an information carrier. Different first electric signals corresponding, respectively, to the different relative contrasts are generated in response to the fiducial markings. Sensing signals indicative of the fiducial markings substantially independently of the different relative contrasts are produced by converting the different first electric signals into corresponding second electric signals having at least one common characteristic.
Abstract translation: 从信息载体中检测出具有不同相对对比度的基准标记。 响应于基准标记产生分别对应于不同相对对比度的不同的第一电信号。 通过将不同的第一电信号转换成具有至少一个共同特征的相应的第二电信号，产生表示基本标记基本上与不同相对对比度无关的感测信号。
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公开(公告)号：US3708226A
公开(公告)日：1973-01-02
申请号：US3708226D
申请日：1971-07-06
Applicant: EASTMAN KODAK CO
Inventor： ASKREN L , FITZGERALD C
IPC: G03B41/10
CPC classification number: G03B41/10
Abstract: Motion picture projection apparatus, for use with filmstrips having aligned images areas and spaced discontinuities such as sprocket perforations or frame lines having fixed spacial relationships to the locations of the image areas on the film, includes a drive mechanism for continuously moving film through an illuminated film gate aperture. The resulting projected images are reflected by a rotatable mirror. An electromagnet clutch is actuable by a free-running multivibrator to interconnect the mirror and the film drive mechanism for rotating the mirror in timed relation to the film movement, thereby maintaining the projected image stationary. A shutter is responsive to the multivibrator output to permit illumination of the film in the gate during mirror movement in one direction and to prevent such illumination of the gate during the return stroke of the mirror. While the free-running time of the multivibrator is a few milliseconds longer than the film frame rate, it is synchronized with the frame rate by a trigger circuit controlled by a film discontinuity sensing device.
Abstract translation: 用于具有对准的图像区域和间隔不连续性的胶片的电影投影装置包括用于连续地将胶片连续移动通过照射膜的驱动机构，例如链轮穿孔或与胶片上的图像区域具有固定的空间关系的框架线 门孔径。 所产生的投影图像由可旋转镜反射。 电磁离合器可由自由运行的多谐振荡器驱动，以将反射镜和胶片驱动机构相互连接，以使镜子以与胶片运动的定时关系旋转，从而保持投影图像的静止。 快门响应于多谐振荡器输出，以允许在反射镜沿一个方向移动时照射门中的胶片，并且防止在反射镜的返回行程期间对门的这种照明。 虽然多谐振荡器的自由运行时间比电影帧速率长几毫秒，但是它通过由薄膜不连续感测装置控制的触发电路与帧速率同步。
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公开(公告)号：US3539250A
公开(公告)日：1970-11-10
申请号：US3539250D
申请日：1968-03-07
Applicant: BELL & HOWELL CO
Inventor： JOHNSTON ROBERT F
CPC classification number: G03B41/10
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公开(公告)号：US3527110A
公开(公告)日：1970-09-08
申请号：US3527110D
申请日：1968-11-14
Applicant: ATOMIC ENERGY COMMISSION
Inventor： ROGERS BENJAMIN T , MEX EMBUDO N
CPC classification number: G03B41/10 , Y10T74/18576 , Y10T74/18752
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公开(公告)号：US2215464A
公开(公告)日：1940-09-24
申请号：US24933439
申请日：1939-01-04
Applicant: HARTFORD NAT BANK & TRUST CO
Inventor： GERARDUS DORGELO EDUARD , ALPHEN PLETER MARTINUS VAN
IPC: G03B41/10
CPC classification number: G03B41/10
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Patent Agency Ranking
公开(公告)号：US1968938A
公开(公告)日：1934-08-07
申请号：US59931432
申请日：1932-03-16
Applicant: AGFA ANSCO CORP
Inventor： LEO GOLDHAMMER
IPC: G03B41/10
CPC classification number: G03B41/10
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公开(公告)号：US1875193A
公开(公告)日：1932-08-30
申请号：US51077731
申请日：1931-01-23
Applicant: AGFA ANSCO CORP
Inventor： RICHARD RUHNAU
IPC: G03B41/10
CPC classification number: G03B41/10
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8.发明授权
公开(公告)号：US1864519A
公开(公告)日：1932-06-28
申请号：US42440930
申请日：1930-01-29
Applicant: DABERT BOULARAN JACQUES , ARMAND DIGEON PIERRE
Inventor： DABERT BOULARAN JACQUES , ARMAND DIGEON PIERRE
IPC: G03B41/10
CPC classification number: G03B41/10
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公开(公告)号：US1828032A
公开(公告)日：1931-10-20
申请号：US36192429
申请日：1929-05-10
Applicant: ETS GAUMONT SOC D
Inventor： RENE DECAUX
IPC: G03B41/10
CPC classification number: G03B41/10
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公开(公告)号：US1496343A
公开(公告)日：1924-06-03
申请号：US49907121
申请日：1921-09-07
Applicant: STANISLAUS KUCHARSKI
Inventor： STANISLAUS KUCHARSKI
IPC: G03B41/10
CPC classification number: G03B41/10
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