Patents by Inventor Hitomi Tojiki
Hitomi Tojiki 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: 4486787Abstract: An intelligent copier for readily performing image enlargement, reduction, synthesis, and editing. In the intelligent copier, an SIT (Static Induction Transistor) image sensor in which a plurality of SIT image cells are arranged two-dimensionally pixel by pixel in the same substrate is used as an image sensor for picking-up the image of a document. It is not necessary to use an expensive mass storage memory for storing the image information, because the SIT image sensor can perform a nondestructive readout, so that the copier can be made small in size and inexpensive in cost.Type: GrantFiled: August 12, 1982Date of Patent: December 4, 1984Assignee: Olympus Optical Company LimitedInventors: Nagahiro Gocho, Hitomi Tojiki, Asao Hayashi, Koji Kambara, Toru Nobuto
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Patent number: 4484817Abstract: In a chemical analyzing apparatus of a colorimetric type in which a light flux transmitted through a test liquid is made incident upon a light receiving element through an optical filter having a predetermined transmission spectrum range and a measurement signal is obtained by processing a photoelectrically converted signal, a plurality of optical filters having different transmission spectrum ranges and arranged side by side and a solid state image sensor having a plurality of light receiving elements each having a photoelectric converting element and a static induction transistor are arranged one upon the other. An analytical result is obtained by calculating output signals selectively derived from light receiving elements which are arranged behind a particular optical filter having a transmission spectrum range related to a wavelength determined by a test item to be studied.Type: GrantFiled: July 6, 1982Date of Patent: November 27, 1984Assignee: Olympus Optical Co., Ltd.Inventors: Toru Nobuto, Asao Hayashi, Koji Kambara, Hitomi Tojiki, Nagahiro Gocho
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Patent number: 4476428Abstract: A power supply device for use in a superminiature tape recorder is disclosed. The device comprises a reference voltage generator circuit for generating an output therefrom in response to a reference voltage, a constant-current circuit for generating a constant current to obtain the reference voltage, a starting circuit for supplying a starting current to the constant current circuit and for branching a part of the starting current, and an electronic switch for causing flow of starting current therein so as to turn the constant-current circuit OFF.Type: GrantFiled: June 20, 1983Date of Patent: October 9, 1984Assignee: Olympus Optical Co., Ltd.Inventors: Teruo Iwasawa, Hitomi Tojiki
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Patent number: 4422023Abstract: A starting circuit for an electronically controlled actuator having an integration capacitor provided in a control signal path and a power supply circuit for supplying a power supply voltage to the motor apparatus, comprises a comparator having first and second given voltages, and a switch circuit coupled to the comparator and to the integration capacitor. The comparator compares the power supply voltage with the first and second given voltages and provides a comparison result when the power supply voltage corresponds to a voltage range between the first and second given voltages. The switch circuit discharges the charge stored in the integration capacitor when the comparison result is provided from the comparator.Type: GrantFiled: July 10, 1981Date of Patent: December 20, 1983Assignee: Olympus Optical Co., Ltd.Inventors: Teruo Iwasawa, Hitomi Tojiki
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Patent number: 4396876Abstract: A motor control apparatus which includes a pulse generator for providing a first signal for specifying the operational condition of a motor, and a motor driver for providing a second signal for driving the motor when the first signal is at a first level and providing a second signal when the first signal is at a second level. The motor control apparatus further includes a comparator, which compares the back electromotive force of the motor with a reference level when the first signal is at the second level and providing a third signal when the back electromotive force is within a given level range prescribed by the reference level. A switch circuit closes a circuit path through which a back electromotive force current produced by the back electromotive force flows when the second and third signals are provided, thereby applying electromagnetic braking with respect to the rotation of the motor.Type: GrantFiled: April 7, 1981Date of Patent: August 2, 1983Assignee: Olympus Optical Co., Ltd.Inventors: Hitomi Tojiki, Teruo Iwasawa
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Patent number: 4393340Abstract: A motor speed control device comprises means for generating pulse output corresponding to the revolution speed of the motor, means for generating saw-tooth wave output in synchronization with the pulse output, means for generating reference voltage, a current mirror load differential amplifier including a first amplifier element having a first current mirror circuit connected as load and supplied with the saw-tooth wave output and a second amplifier element having a second current mirror circuit connected as load and supplied with the reference voltage and for supplying current to the first or second current mirror circuit corresponding to the result of comparing the reference voltage with the saw-tooth wave output, an integrating circuit to be charged or discharged by the charging current flowing through one of the first and second current mirror circuits and the discharging current flowing through the other of both circuits, and means for driving the motor by output of the integrating circuit.Type: GrantFiled: June 10, 1981Date of Patent: July 12, 1983Assignee: Olympus Optical Company LimitedInventors: Teruo Iwasama, Hitomi Tojiki
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Patent number: 4355268Abstract: Disclosed is a motor control apparatus which includes a pulse generator for producing a first signal as a pulse signal having a period corresponding to the rotational speed of a motor, a timer for producing a second signal inverted to a first level in response to the first signal and subsequently inverted to a second level after the lapse of a predetermined period of time, a phase compensator for producing a third signal obtained through a phase advance type phase compensation for the second signal, a voltage/current converter for supplying and receiving a first current signal and a second current signal in accordance with the level of the third signal, an integrator for producing an output signal obtained through the integration of the first and second current signals, and a buffer for driving the motor in accordance with the level of the output signal.Type: GrantFiled: December 29, 1980Date of Patent: October 19, 1982Assignee: Mobil Oil CorporationInventors: Teruo Iwasawa, Hitomi Tojiki