公开(公告)号：US4191459A

公开(公告)日：1980-03-04

申请号：US701020

申请日：1976-06-30

申请人： Takeo Saito ,  Youichi Seki ,  Kiyoshi Kitai

发明人： Takeo Saito ,  Youichi Seki ,  Kiyoshi Kitai

IPC分类号： G03B7/093 ,  G03B9/58 ,  G03B7/08

CPC分类号： G03B7/093 ,  G03B9/58

摘要： A camera shutter digital control circuit having a counter for counting a number of pulses representative of exposure time and for reading-out the counted pulses to control exposure time. An adjustable delay circuit synchronizes shutter opening and the initiation of memory read-out. Upon the initiation of shutter opening a signal is applied to the delay circuit, which is adjusted to develop a delay equal to a particular shutter opening time. The delayed signal is then applied to initiate reading-out of the control pulses so that the exposure time is controlled in synchronism with the shutter opening.

摘要翻译： 一种照相机快门数字控制电路，具有用于对代表曝光时间的脉冲数进行计数并用于读出计数脉冲以控制曝光时间的计数器。 可调节延迟电路使快门开启和存储器读出的启动同步。 在快门打开开始时，信号被施加到延迟电路，该延迟电路被调整以产生等于特定快门打开时间的延迟。 然后施加延迟信号以开始读出控制脉冲，使得曝光时间与快门开口同步地被控制。

公开(公告)号：US4038675A

公开(公告)日：1977-07-26

申请号：US558356

申请日：1975-03-14

申请人： Kiyoshi Kitai ,  Takeo Saito ,  Youichi Seki

发明人： Kiyoshi Kitai ,  Takeo Saito ,  Youichi Seki

IPC分类号： G03B7/093 ,  G03B9/62 ,  G03B9/64 ,  G03B17/18 ,  G04F3/00

CPC分类号： G03B9/64

摘要： An electric camera shutter of the type having a digital recording and reproducing system has a self-timer mode and has a counter circuit for counting and memorizing pulses produced by a pulse generator. In one mode of operation, the exposure time is controlled in accordance with the memorized content of the counter circuit and when in the self-timer mode, the output of the counter circuit controls the energization of a self-timer operation indicator circuit which indicates operation in the self-timer mode.

公开(公告)号：US4019189A

公开(公告)日：1977-04-19

申请号：US550030

申请日：1975-02-14

申请人： Kiyoshi Kitai ,  Takeo Saito ,  Youichi Seki

发明人： Kiyoshi Kitai ,  Takeo Saito ,  Youichi Seki

IPC分类号： G03B7/093 ,  G03B9/62 ,  G03B9/64 ,  G03B7/08

CPC分类号： G03B7/093

摘要： A digital exposure time control circuit including a standard pulse generating circuit for developing standard rate pulses which are applied under control of a brightness-time conversion circuit to a dividing circuit, and subsequently counted in a reversible counter operating in a counting mode. The number of standard pulses counted are controlled by the brightness-time conversion circuit to be proportional to an exposure time, and the counted pulses are subsequently read-out from the counter to control exposure time. The exposure time control circuit also includes a self-timer control circuit which is responsive to a predetermined number of counted pulses to clear the reversible counter, and enable the brightness-time conversion circuit when the number of counted pulses exceeds the predetermined number in order to develop a delay time, determined by the predetermined number of pulses to which the self-timer is responsive, before the start of counting the pulses for controlling exposure time.The known electric self-timer circuit of exterior photometric type exposure time control circuit is provided with a delay circuit consisting of condensers, resistors, and other analog components separate from the exposure time control circuit. Camera operation actuates the delay circuit for the self-timer when the self-timer is employed, demagnetizes (excites) the electromagnet for controlling the self-timer time when the self-timer time is ended, mechanically transfers a change-over switch from the delay circuit for the self-timer to the exposure time control circuit by a well-known means, simultaneously opens the shutter blade, and after effecting exposure allows the electromagnet for exposure time control to be demagnetized (excited) thereby closing the shutter blade.For the electric self-timer circuit of an internal photometric type electric shutter control circuit, however no consideration has hitherto been given as to whether the time of exposure is controlled by an analog means or whether it is digitally controlled. From this viewpoint, an addition of an electric self-timer to the internal photometric type electric shutter control circuit may, for example, as in the electric self-timer circuit of the above-said external photometric type electric shutter control circuit wherein the delay circuit for self-timer is separate from the exposure time control circuit, and after elapse of self-timer time, the change-over switch is made to transfer to the exposure time control circuit by a signal generated upon demagnetization (exciting) of the electromagnet for controlling self-timer time thereby to effect memorizing the brightness of a subject and causing the view finder mirror's up going motion. When the mirror goes up, for example, in the case of a focal-plane shutter, exposure is completed by allowing the front shutter curtain to travel first for effecting exposure, and then by travelling the back shutter curtain as the electromagnet for controlling the time of exposure is demagnetized (excited). However, the self-timer circuit system applying the above-said method must also be provided with the delay circuit for the self-timer besides the exposure time control circuit, and since the self-timer time is normally approximately ten seconds, not only the condenser with a high capacitance is required, but the space convenience and cost requirements may be prohibitive. An electric shutter circuit using this type of memory reproducing system is often integrated, usually because it is complicated. And, it is now almost impossible to provide a condenser having a high capacitance in an integrated circuit. As described above, moreover, any bounce of the change-over switch inevitably occurs when the change-over switch is transfered from the self-timer circuit to the exposure time control circuit by a signal obtainable from the electromagnet for controlling self-timer time at the completion of self-timer operation and will cause a big error in subsequent memory actions so that the most reliable changeover switch will be required. Besides, there is a defect such that if memory action is made before completion of memorization when the memory time is long, because the change-over switch is mechanically transfered from the delay circuit for the self-timer to the exposure time control circuit by a signal obtained from the electromagnet for controlling self-timer time control mirror-up movement will begin at the same time and the exposure time control circuit will remain in the memory mode.The present invention eliminates the above-said defect with an exposure time control circuit for a camera electric shutter, with a self-timer in the electric shutter control circuit which is of the type having a digital memory reproducing system in which pulses generated in a pulse generating circuit are memorized in a counting circuit by counting a number which corresponds to the brightness of a subject, and the time of exposure is controlled according to the memory content memorized in the counting circuit in synchronism with the start of shutter actuation. Standard pulses with a given frequency generated in the pulse generating circuit are divided through the counting circuit when the self-timer is operative and memorized after during an elapse of actuating time by the self-timer. Then a signal for starting the shutter opening is generated at the completion time of memorization.The embodiment of the present invention is based upon the exposure time control circuit for electric shutter using a digital memory reproducing system being proposed under the patent application Nos. Sho 48-95005, Sho 48-95006, Sho 48-95007 and Sho 48-95008 by this applicant, to which the self-timer circuit is added.

摘要翻译： 一种数字曝光时间控制电路，包括标准脉冲发生电路，用于产生在亮度时间转换电路的控制下施加到分频电路的标准速率脉冲，并随后在以计数模式操作的可逆计数器中计数。 计数的标准脉冲数由亮度 - 时间转换电路控制成与曝光时间成比例，随后从计数器读出计数脉冲以控制曝光时间。 曝光时间控制电路还包括自拍定时器控制电路，其响应于预定数量的计数脉冲来清除可逆计数器，并且当计数脉冲数超过预定数量时启用亮度时间转换电路，以便 在开始计数用于控制曝光时间的脉冲之前产生由自拍定时器响应的预定脉冲数确定的延迟时间。

公开(公告)号：US4382694A

公开(公告)日：1983-05-10

申请号：US122173

申请日：1980-02-19

申请人： Kiyoshi Kitai ,  Takeo Saito

发明人： Kiyoshi Kitai ,  Takeo Saito

IPC分类号： G04C3/14 ,  G04C9/08 ,  G04G5/02 ,  G04C9/00

CPC分类号： G04C3/14 ,  G04G5/02

摘要： A step second timepiece comprises a quartz crystal oscillator and a frequency divider containing a reset circuit. The reset circuit includes a reset switch operable such that the time interval from when the reset switch is released up to when the next pulse is fed from the frequency divider is shorter than the pulse interval of the successive pulses fed from the said frequency divider thereby compensating for time lag associated with the release of the reset switch.

摘要翻译： 第二秒钟包括石英晶体振荡器和包含复位电路的分频器。 复位电路包括复位开关，其可操作使得从复位开关释放时到从分频器馈送下一个脉冲的时间间隔短于从所述分频器馈送的连续脉冲的脉冲间隔，从而补偿 用于与复位开关的释放相关联的时滞。

公开(公告)号：US4389105A

公开(公告)日：1983-06-21

申请号：US961742

申请日：1978-11-17

申请人： Kiyoshi Kitai ,  Takeo Saito ,  Takashi Segawa ,  Yoichi Seki

发明人： Kiyoshi Kitai ,  Takeo Saito ,  Takashi Segawa ,  Yoichi Seki

IPC分类号： G03B13/36 ,  G02B7/30 ,  G02B7/34 ,  G03B3/00 ,  G03B3/10

CPC分类号： G02B7/34

摘要： A device for detecting coincident focusing points for use in the controlling of the focusing of an automatically focusable lens comprises a single array of light receiving transducers for converting the distribution of light intensity of an image applied thereon to a set of corresponding electrical signals. The image applied to the array is from a first optical path from an object through the lens and from a second optical path from the object. At least one shutter is provided for cutting off one of the optical paths to alternatively effect the application of light from the one optical path on to the array to produce a first set of signals and thereafter the light from either the other optical path or the sum of the two optical paths on to the array to produce a second set of signals. The first set of signals are processed to produce a third set of signals which correspond to the ratio of each signal therein with respect to another of the signals and the second set of signals is processed to obtain a fourth set of signals corresponding to the ratio of each signal with respect to another of the signals. The third and fourth sets of signals, for each transducer, are compared and a signal is produced when a favorable comparison is obtained.

摘要翻译： 用于检测用于控制自动聚焦透镜的聚焦的重合聚焦点的装置包括用于将施加于其上的图像的光强度分布转换为一组相应电信号的单个光接收传感器阵列。 应用于阵列的图像是从物体通过透镜的第一光路和来自物体的第二光路。 提供至少一个快门以切断光路中的一个，以交替地影响将光从一个光路施加到阵列上以产生第一组信号，此后来自另一个光路或总和的光 的两条光路通向阵列以产生第二组信号。 处理第一组信号以产生对应于其中的每个信号相对于另一个信号的比率的第三组信号，并且第二组信号被处理以获得对应于第二组信号的比率 每个信号相对于另一个信号。 对于每个换能器，第三和第四组信号进行比较，并且当获得有利的比较时产生信号。

公开(公告)号：US4331399A

公开(公告)日：1982-05-25

申请号：US033507

申请日：1979-04-30

申请人： Kiyoshi Kitai ,  Takeo Saito

发明人： Kiyoshi Kitai ,  Takeo Saito

IPC分类号： G03B13/36 ,  G02B7/30 ,  G03B3/00 ,  G03B7/08

CPC分类号： G02B7/305

摘要： A focal point detecting device comprises a light-receiving device having a plurality of light-receiving elements which receive incident light coming from two different light paths. In the first step, the light-receiving device receives the incident light coming from the second light path while the first light path is blocked and the values of the photoelectric outputs A.sub.1, . . . A.sub.n of each of the light-receiving elements are compared one with another and the compared values stored in a memory circuit. In the second step, the light-receiving device receives either the incident light coming from the first light path while the second light path is blocked or the incident light coming from both the first and second light path and the values of the photoelectric outputs B.sub.1, . . . B.sub.n of each of the light-receiving element are compared on with another and the compared values are compared with the contents stored in the memory circuit and a focal point coincident signal is fed out in response to a favorable comparison.

摘要翻译： 焦点检测装置包括具有接收来自两个不同光路的入射光的多个光接收元件的光接收装置。 在第一步骤中，光接收装置在第一光路被阻挡时接收来自第二光路的入射光，并且接收光电输出A1的值。 。 。 每个光接收元件的一个被彼此进行比较，并且存储在存储器电路中的比较值。 在第二步骤中，光接收装置接收来自第一光路的入射光，同时阻挡第二光路或来自第一和第二光路的入射光以及光电输出B1， 。 。 。 将每个光接收元件的Bn与另一个进行比较，并将比较的值与存储在存储器电路中的内容进行比较，并且响应于有利的比较而馈送焦点重合信号。

公开(公告)号：US4264177A

公开(公告)日：1981-04-28

申请号：US677148

申请日：1976-04-15

申请人： Kiyoshi Kitai ,  Eiichi Onda ,  Masanori Watanaba

发明人： Kiyoshi Kitai ,  Eiichi Onda ,  Masanori Watanaba

IPC分类号： G03B9/18 ,  G03B9/36

CPC分类号： G03B9/18

摘要： A focal plane shutter for a camera of the type wherein an image is viewed through the photographing lens by use of a viewfinder arranged on top of the camera body. The shutter blade mechanism comprises a group of opening blades and a group of closing blades, each group of blades consisting of a plurality of separate blades which are actuated to run in the vertical direction of the camera for exposing the film. The lower group of blades has a larger vertical dimension when in the retracted condition than the upper group of blades and such is achieved by using a different number or different size of blades in the two blade groups. In both groups, the slit-forming blades are mounted by means of a link mechanism to effect parallel running movement of the blades. The pivot shafts for mounting the slit-forming blades are disposed at a position outside of the region lying vertically below the viewfinder.

摘要翻译： 一种用于相机类型的焦平面快门，其中通过使用布置在相机主体顶部上的取景器通过拍摄镜头观看图像。 快门叶片机构包括一组开口叶片和一组封闭叶片，每组叶片由多个独立的叶片组成，其被驱动以在照相机的垂直方向上运行以暴露薄膜。 当处于缩回状态时，下组叶片具有比上部叶片组更大的垂直尺寸，并且通过在两个叶片组中使用不同数量或不同尺寸的叶片来实现。 在两组中，狭缝形成叶片通过连杆机构安装以实现叶片的平行运行。 用于安装狭缝形成刀片的枢转轴设置在垂直于取景器下方的区域的外侧的位置。

公开(公告)号：US4258988A

公开(公告)日：1981-03-31

申请号：US17938

申请日：1979-03-06

申请人： Kiyoshi Kitai ,  Tadashi Nakagawa ,  Hiroaki Ishida

发明人： Kiyoshi Kitai ,  Tadashi Nakagawa ,  Hiroaki Ishida

IPC分类号： G03B13/36 ,  G02B7/30 ,  G03B3/10 ,  G03B17/38 ,  G03B7/08 ,  G01J1/20

CPC分类号： G03B17/38 ,  G03B3/10

摘要： An automatic lens focusing mechanism including a displaceable operating member, a focusing mechanism cooperative with the operating member for changing the focus of a lens as the operating member is displaced, and a mechanism comprising a control member displaced by the operating member as the operating member is displaced. An electromagnet is effective to hold an armature when it is energized. When the electromagnet is not energized the armature is mounted for sliding across a face of the electromagnet adjacent and parallel to the electromagnet face. A focus detecting mechanism energizes the electromagnet when the control member is at a position corresponding to a focused condition of the lens for holding the armature and the control member at a position corresponding to the focused condition to thereby hold the lens at the focused condition.

摘要翻译： 一种自动透镜聚焦机构，包括可移动操作构件，与操作构件协作的聚焦机构，用于在操作构件移位时改变透镜的焦点;以及机构，包括当操作构件为由操作构件移位时的控制构件 流离失所 电磁铁在通电时有效地保持电枢。 当电磁体未被通电时，衔铁被安装用于滑过电磁体的与电磁体表面相邻并平行的面。 当控制构件处于与用于将电枢保持的镜片的聚焦状态对应的位置和控制构件在与​​聚焦状态相对应的位置处时，聚焦检测机构激励电磁体，从而将透镜保持在聚焦状态。

公开(公告)号：US4205908A

公开(公告)日：1980-06-03

申请号：US973587

申请日：1978-12-27

申请人： Kiyoshi Kitai ,  Eiichi Onda ,  Masanori Watanabe

发明人： Kiyoshi Kitai ,  Eiichi Onda ,  Masanori Watanabe

IPC分类号： G03B9/64

CPC分类号： G03B9/64

摘要： A camera shutter equipped with a selftimer device has an interlocking member for coordinating the movement of the camera operating member and the selftimer device to obtain accurate operation of the shutter release member. The interlocking member has a first arm which engages with the operating member during movement thereof at the beginning portion of the shutter release motion and the operating member thereafter drives the interlocking member to a position in which the interlocking member actuates the selftimer device to initiate a timing operation. Near the end of the timing operation, the selftimer device engages with a second arm of the interlocking member and thereafter drives the interlocking member to another position during the course of which a translating lever mounted on the interlocking member actuates the shutter release member to initiate release of the shutter.

摘要翻译： 配备有定位装置的相机快门具有联锁构件，用于协调相机操作构件和定影装置的移动，以获得快门释放构件的精确操作。 互锁构件具有第一臂，其在快门释放运动的开始部分的运动过程中与操作构件接合，然后操作构件将互锁构件驱动到联锁构件致动定位装置以启动定时装置的位置 操作。 接近定时操作结束时，自动定位装置与互锁构件的第二臂接合，此后将互锁构件驱动到另一位置，在此过程中，安装在互锁构件上的平移杆致动快门释放构件以启动释放 的快门。

公开(公告)号：US4045627A

公开(公告)日：1977-08-30

申请号：US565116

申请日：1975-04-04

申请人： Kiyoshi Kitai ,  Masuo Ogihara ,  Kouzo Sato ,  Nobuo Shinozaki

发明人： Kiyoshi Kitai ,  Masuo Ogihara ,  Kouzo Sato ,  Nobuo Shinozaki

IPC分类号： G04C23/08 ,  G04C21/20 ,  G04C23/16 ,  H01H43/10 ,  G04B23/10 ,  G04C21/36

CPC分类号： G04C21/20

摘要： An electrical switch device for detecting preset alarm times in an alarming device comprises a one-piece switch part connected to and rotatable with a rotationally driven time wheel, and first and second fixed switch parts electrically insulated from each other. An alarming circuit is electrically connected to the fixed switch parts and sounds an audible alarm when the switch parts are closed. An alarm time setting mechanism is settable in a predetermined angular position corresponding to the alarm time to be detected so that when the time wheel is driven to the predetermined position, the switch parts are closed thereby activating the alarm.