Patents by Inventor Osamu Maida

Osamu Maida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5153632
    Abstract: A flash exposure apparatus for eliminating red-eye effect employs first and second flash devices in conjunction with a camera. The camera outputs a first release signal prior to an exposure operation and a second release signal in synchronism with the exposure operation. A detecting device detects completion of preparation (charging) of flash light emission of the flash devices. When the completion of preparation of flash light emission of both flash devices is detected, the first and second flash devices are caused to emit light in response to the first and second release signals, respectively. When the completion of preparation of flash light emission of only one flash device is detected, only that flash device is caused to emit light in response to the second release signal. In another embodiment a main flash device emits light for illuminating an object, and an auxiliary flash device emits light, prior to emission by the main flash device, to decrease the pupil diameter of a human eye.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: October 6, 1992
    Assignee: Nikon Corporation
    Inventors: Osamu Maida, Hidehiro Ogawa
  • Patent number: 4630917
    Abstract: A camera in which the exposure of a film is controlled includes means for making a digital signal, converting means for converting the digital signal from the making means into an analog signal and putting out the analog signal, means for detecting the brightness of an object to be photographed and producing an analog brightness signal indicative of the detected brightness of the object to be photographed, means for comparing the analog signal from the converting means with the brightness signal, the means being adapted to put out a comparison signal when the analog signal from the converting means and the brightness signal assume a predetermined relation, the making means putting out to the converting means a digital signal indicative of exposure information concerned in the control of the exposure of the film on the basis of the digital signal made by the making means when the comparison signal is put out, the converting means converting the digital signal indicative of the exposure information into an anal
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: December 23, 1986
    Assignee: Nippon Kogaku K. K.
    Inventors: Osamu Maida, Takashi Saegusa
  • Patent number: 4624540
    Abstract: A camera is capable of using a film cartridge bearing code indicia indicating the film speed of the film contained in the cartridge. The camera comprises first means for detecting the film speed from the code indicia of the film cartridge loaded in the camera and generating a first corresponding signal, and second means for manually setting the film speed and generating a second corresponding signal. The camera further comprises discriminator means connected to the first and second means and adapted to generate an output signal upon detection that neither the first nor the second signal is generated, and means for generating an alarm in response to the output signal of the discriminator means.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: November 25, 1986
    Assignee: Nippon Kogaku K. K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4600289
    Abstract: An aperture control system comprises compensating means for actuating an electromagnetic latch mechanism at an earlier time to compensate errors in controlled aperture values due to the mechanical time delay in the electromagnetic latch mechanism, and means for setting a compensated amount in the compensating means in accordance with the error in a controlled aperture value for each interchangeable lens.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: July 15, 1986
    Assignee: Nippon Kogaku K. K.
    Inventors: Osamu Maida, Akira Katayama
  • Patent number: 4579433
    Abstract: A film sensitivity setting device for camera is provided with a circuit board comprising a first information unit with a conductor pattern which detects the film sensitivity information signal from a film cartridge having such signal and corresponds to the information signal of the manually set film sensitivity, and a second information unit with a conductor pattern for transmitting the detected information signal, wherein the exposure of the film is controlled according to the information signal obtained by electrical contact with the conductor pattern of either the first or the second information unit.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: April 1, 1986
    Assignee: Nippon Kogaku K.K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4561741
    Abstract: A film feed control apparatus generates an output signal for instructing the rewinding of the film when a wind operation for a frame of a film is stopped before it is completed and the number of exposed frames has exceeded a nominal number of exposures. The film feed control apparatus stops the power supply to a wind motor when the wind operation is stopped before the number of exposed frames reaches the nominal number of exposures.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: December 31, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4558935
    Abstract: Apparatus for detecting code indicia containing electrically conductive contacts and being indicative of one or more characteristics of the film contained in the film cartridge, comprises a wall member forming a chamber for receiving the cartridge. The wall member has through-holes provided at positions opposed to the code indicia. The apparatus is further provided with a circuit substrate disposed on the side opposite to the chamber and opposed to the wall member and having thereon an electric circuit means for reading the characteristics of the film. The circuit substrate has electric terminals. The apparatus further includes electrically conductive contact members being slide-movably inserted into the respective through-holes on the wall member. Each of the contact members has two ends one of which contacts with one of the code indicia and the other end contacts with one of the electric terminals.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: December 17, 1985
    Assignee: Nippon Kogaku K. K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4553140
    Abstract: A power supply control circuit for controlling power supply through a power switch to a battery-operated circuit. The control circuit includes circuitry for keeping the power supply to the battery-operated circuit for a predetermined holding time after the power switch has been turned off, the holding time being reduced as consumption of the battery develops.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: November 12, 1985
    Assignee: Nippon Kogaku K. K.
    Inventor: Osamu Maida
  • Patent number: 4550991
    Abstract: A camera is provided with a detecting means provided with detecting contacts capable of positively detecting an information code on a film cartridge loaded in a film chamber and so arranged that they will not adversely affect the stability of the film cartridge loaded in the film chamber.
    Type: Grant
    Filed: November 27, 1984
    Date of Patent: November 5, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4538893
    Abstract: In a camera having a stop drive mechanism adapted to be driven by an electric motor to vary a stop aperture and a film wind-up mechanism adapted to be driven by the electric motor to wind up a film, the electric motor is rotated to drive the stop drive mechanism before exposure of the film, and it is also rotated to drive the film wind-up mechanism after the exposure of the film. The rotating speeds of the electric motor in the first rotation to drive the stop drive mechanism and in the second rotation to drive the film wind-up mechanism are independently variable.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: September 3, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Yoshiyuki Nakano, Osamu Maida
  • Patent number: 4538890
    Abstract: A camera into which a magazine containing a film therein and provided with means indicative of information concerning the film speed of the film can be loaded includes a device for detecting the film speed of the film on the basis of the information when the magazine is loaded into the camera and producing a first film speed signal indicative of the detected film speed, a device for manually setting the film speed of the film and producing a second film speed signal indicative of the set film speed of the film, a device for detecting the difference between the film speeds of the film indicated by the first and second film speed signals and producing a warning signal, a device for drawing out the film from the loaded magazine, and a device for hindering the production of the warning signal in response to the draw-out of a predetermined amount of film from the magazine.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: September 3, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Sunao Ishizaka, Osamu Maida
  • Patent number: 4527882
    Abstract: Display apparatus for an automatic exposure control camera wherein, when the exposure control mode is automatically changed over from one mode to another, a display is presented to the photographer to indicate the fact of the change over.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: July 9, 1985
    Assignee: Nippon Kogaku K.K.
    Inventor: Osamu Maida
  • Patent number: 4525637
    Abstract: An integrated circuit has an input voltage-clamping function and an input current-detecting function. A voltage-clamping circuit is provided for clamping a voltage at the input signal terminal, the voltage being clamped in response to an input current greater than a first predetermined value supplied to the input terminal. A current detecting circuit is also provided for detecting whether the input current supplied to the input terminal is greater than a second predetermined value, whereby the single input terminal for signals is used for both functions, i.e., the input voltage-clamping function and the input current-detecting function.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: June 25, 1985
    Assignees: Fujitsu Limited, Nippon Kogaku K.K.
    Inventors: Yoshiaki Sano, Chikara Tsuchiya, Osamu Maida
  • Patent number: 4519683
    Abstract: In an electronic flash apparatus, electric power is alternately supplied by a same power source to the voltage elevating circuit for charging the main capacitor for flash emission and to other circuits provided in the flash unit or in the camera, such as a light emission control circuit for controlling the quantity of emitted light, an indicator circuit for indicating the completion of the charging of the main capacitor, an indicator circuit for indicating whether the light emission control is in operation, an alarm circuit for indicating an inadequate setting of the flash unit etc.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: May 28, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Nobuyoshi Hagyuda, Hiroshi Hasegawa, Yoshikazu Iida, Osamu Maida
  • Patent number: 4509847
    Abstract: A camera in which light-sensing means is exposed to the light from an object to be photographed passed through stop means includes means for setting the aperture value of the stop means, means for driving the stop means in a direction in which the aperture value of the stop means is coincident with the aperture value by the setting means, prior to the exposure of the light-sensing means, metering means including a light-receiving element adapted to receive the light from the object passed through the stop means and produce an output corresponding to the intensity of the received light, the metering means producing a metering output corresponding to the brightness of the object on the basis of the output of the light-receiving element, means for controlling the exposure time of the light-sensing means in order that the light-sensing means may obtain a proper exposure, on the basis of the metering output after the stop means has been driven by the driving means, and discriminating means for discriminating, prio
    Type: Grant
    Filed: May 3, 1983
    Date of Patent: April 9, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Osamu Maida, Mikio Takemae, Yuji Okubo
  • Patent number: 4494851
    Abstract: In a flashlight emission system, apparatus for lighting a flash tube to illuminate an object and for controlling the quantity of emitted light from the flash tube, the apparatus being cooperative with a camera having structure for presetting ASA speed of film and aperture value of a taking lens prior to taking, there is provided a device for displaying the limit of object distance for providing an optimum exposure to the film comprising; apparatus for receiving information of the ASA speed and aperture value from the camera to make up first data corresponding to the received information; apparatus for making second data indicative of the limit of the quantity of emitted light controllable by the control apparatus; a device for calculating the limit of object distance from the first and second data and generating an output corresponding to the limit found out by the calculation; and apparatus for making a visual display of the limit of object distance in response to the output of the calculation device.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: January 22, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Osamu Maida, Hiroshi Hasegawa, Nobuyoshi Hagyuda, Yoshikazu Iida
  • Patent number: 4468109
    Abstract: An automatic exposure control camera, with a plurality of selectable control modes, has a display device that normally display an exposure value determined by the control mode and by operating conditions of the automatic exposure control. The user may cause the display device to display a different exposure value, which again depends upon the control mode and the operating conditions of the automatic exposure control. A further display device displays the selected mode and also indicates, as by the blinking of an indicator element, when certain limits of exposure time value or aperture value have been reached (with appropriate modification of the exposure control operation). In one control mode, the automatic exposure control is reprogrammed in association with the selection of shutter speeds.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: August 28, 1984
    Assignee: Nippon Kogaku K.K.
    Inventor: Osamu Maida
  • Patent number: 4465369
    Abstract: A simplified multi-light measuring device in a photographic system capable of measuring an object field divided into plural areas. The device comprises register means (e.g. 100-500) comprising plural registers for storing plural photoelectric output signals from the plural areas as digital data; reference output generating means (e.g. 60) for generating a reference output signal for determining digital data to be stored in the register means; comparator means (e.g. 21-25) for comparing each of the plural photoelectric output signals with the reference output signal and providing a corresponding output signal; and retaining means for retaining, in response to the output signal from the comparator means, digital data stored in a corresponding register of the register means.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: August 14, 1984
    Assignee: Nippon Kogaku K.K.
    Inventors: Takashi Saegusa, Osamu Maida
  • Patent number: 4462670
    Abstract: A light measuring apparatus for camera is disclosed. It is known that some type of light measuring apparatus for camera involves the problem of so-called "latch" which is caused by opposite charge accumulated at the high impedance location in the light measuring circuit. The light measuring apparatus is provided with means for cancelling the latch in a simple and reliable manner.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: July 31, 1984
    Assignee: Nippon Kogaku K.K.
    Inventor: Osamu Maida
  • Patent number: 4451150
    Abstract: A photographing camera used with a film magazine device includes a film feed means and a first driving source for driving said feed means. The film magazine device includes means for taking up the film from said feed means and a second driving source for driving said take-up means the driving time required for said first driving source to feed a definite amount of film changes in accordance with a function as represented by a rectangular hyperbola relative to the output voltage of power supply means for said first and second driving sources. Apparatus for controlling said second driving source comprises drive control means for controlling the driving time of said second driving source so as to drive it for a time shorter than the driving time of said first one by a nearly constant time. The drive control means includes means for changing the driving time of said second driving source in approximation to a function as represented by another rectangular hyperbola.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: May 29, 1984
    Assignee: Nippon Kogaku K.K.
    Inventor: Osamu Maida