Patents by Inventor Masayuki Nakasa
Masayuki Nakasa 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).
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Patent number: 6028729Abstract: An apparatus provided with a magnetic head including a core, a writing coil and a reading coil wound around the core; a writing circuit connected with the writing coil for driving the writing coil; a reading circuit connected with the reading coil for generating a read signal based on an output of the reading coil; a power source for supplying an electric power to the writing circuit; and a controller for suspending the supply of electric power to the writing circuit when the reading circuit is in operation.Type: GrantFiled: February 20, 1997Date of Patent: February 22, 2000Assignee: Minolta Co., Ltd.Inventors: Masayuki Nakasa, Junji Takahata, Toshihito Kido
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Patent number: 5333030Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data is transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: November 6, 1992Date of Patent: July 26, 1994Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi
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Patent number: 5249014Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data is transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: June 3, 1992Date of Patent: September 28, 1993Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi
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Patent number: 5220368Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: June 10, 1992Date of Patent: June 15, 1993Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi
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Patent number: 5089834Abstract: A mounting device on a camera has a mounting member to fit with an accessory so as to mount the accessory on the camera by sliding it. The mounting member which is molded out of plastic in one piece has eaves-like portions overhanging from an upper portion thereof in opposite directions intersecting perpendicularly to a mounting direction of the accessory, thus having a generally T-shaped cross section. The mounting member has a groove running in the mounting direction at a top central portion for receiving a projecting portion of the accessory so as to determine a horizontal (lateral) position of the accessory relative to the camera. The eaves-like portions receive mating members of the accessory thereunder so as to determine a vertical position of the accessory relative to the camera.Type: GrantFiled: December 10, 1990Date of Patent: February 18, 1992Assignee: Minolta Camera Kabushiki KaishaInventors: Masayuki Nakasa, Norio Ishikawa, Hiroshi Hosomizu, Tatsuro Izumi, Keiji Yamazaki, Yukio Miki, Mamoru Katsuragi
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Patent number: 4992820Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data is transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: October 13, 1989Date of Patent: February 12, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Tanijuchi
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Patent number: 4970538Abstract: A camera comprising a flash unit attachable to a camera body, a switching device and a control device. The flash unit includes a light emitter switchable between an emission permit state in which the light emitter is projected from a body of the flash device and an emission prohibit state in which the light emitter is retracted into the body. The flash unit further includes a control circuit for selectively placing the light emitter in the emission permit state and the emission prohibit state. A main switch is provided in the camera body to be switchable between a position for permitting a camera operation and a position for prohibiting the camera operation. When the light emitter is placed in the emission permit state when the main switch is switched to the position for permitting the camera operation.Type: GrantFiled: March 9, 1990Date of Patent: November 13, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Tsutomu Ichikawa, Masayuki Yoshii, Norio Ishikawa, Akihiko Fujino, Masayuki Nakasa, Mashio Kitaura, Kenji Tsuji
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Patent number: 4961083Abstract: An accessory shoe for mounting an electronic flash device on a camera, which is provided at a top portion of the camera and has a plurality of terminals for circuitry of the camera arrayed in a direction in which the electronic flash device is inserted into the accessory shoe. Of the plurality of terminals, a terminal which leads to an X contact and outputs a signal indicative of a situation of the X contact is located at a position closest to an insertion opening of the accessory shoe and is connected to a terminal on an electronic flash device for inputting the signal at the end of a mounting procedure of the electronic flash device.Type: GrantFiled: May 11, 1989Date of Patent: October 2, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Masayuki Nakasa, Norio Ishikawa, Hiroshi Hosomizu
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Patent number: 4951068Abstract: A camera comprising a flash unit attachable to a camera body, a switching device and a control device. The flash unit includes a light emitter switchable between an emission permit state in which the light emitter is projected from a body of the flash device and an emission prohibit state in which the light emitter is retracted into the body. The flash unit further includes a control circuit for selectively placing the light emitter in the emission permit state and the emission prohibit state. A main switch is provided in the camera body to be switchable between a position for permitting a camera operation and a position for prohibiting the camera operation. When the light emitter is placed in the emission permit state when the main switch is switched to the position for permitting the camera operation.Type: GrantFiled: May 16, 1989Date of Patent: August 21, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Tsutomu Ichikawa, Masayuki Yoshii, Norio Ishikawa, Akihiko Fujino, Masayuki Nakasa, Mashio Kitaura, Kenji Tsuji
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Patent number: 4935766Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in a plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data transmission between the microcomputer and the circuits uses a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer, are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit. The camera system is capable of coordinating flash mode and a bracket exposure mode.Type: GrantFiled: March 24, 1989Date of Patent: June 19, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi
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Patent number: 4878751Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data is transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: March 24, 1989Date of Patent: November 7, 1989Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi
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Patent number: 4816853Abstract: A camera system including a camera body and a camera accessory attachable to the camera body, such as an interchangeable back lid, an interchangeable lens, a flash device and so on, is disclosed. In the system, a plurality of circuits provided in the plurality of camera accessories are controlled by a microcomputer provided in the camera body. Data is transmitted between the microcomputer and the circuits using a serial data bus and synchronizing clock line connected therebetween. The circuit to receive the data sent from the microcomputer, or the circuit which should send the data to the microcomputer are selected by the microcomputer through chip select lines provided between the microcomputer and each circuit.Type: GrantFiled: January 21, 1986Date of Patent: March 28, 1989Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshiiku Kikukawa, Masayuki Nakasa, Tadahiro Yoshida, Mashio Kitaura, Masaaki Nakai, Takanobu Omaki, Nobuyuki Taniguchi