Patents Assigned to Tokyo Keiki Co., Ltd.
-
Patent number: 4884580Abstract: This invention relates to a hyperthermia device for treating cancerous growth in a living body utilizing electromagnetic waves. It features an ability for maintaining the temperature of the heated region by effectively controlling the output of the electromagnetic waves and the temperature of the heated body surface accurately which was heretofore considered most difficult.Type: GrantFiled: September 30, 1988Date of Patent: December 5, 1989Assignee: Tokyo Keiki Co. Ltd.Inventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4879918Abstract: A gyro compass having a gyro case incorporating a gyro of which the spin axis is substantially horizontal, a vertical ring disposed around the outer periphery of the gyro case and for rotatably supporting the gyro case around a vertical axis, a follow-up pickup for detecting an angular displacement between the gyro case and the vertical ring around the vertical axis, an accelerometer having an input axis parallel to the spin axis, a vertical torquer mounted on the vertical ring for applying a torque of magnitude proportional to an input signal to the gyro case around the vertical axis, and a control apparatus for receiving an output signal of the accelerometer and for supplying its output to the vertical torquer, in which during a predetermined time after the gyro compass is started to operate, the output signal from the accelerometer is differentiated to produce a differentiation signal which is then supplied to the vertical torquer to reduce a settling time of the north-seeking action.Type: GrantFiled: October 27, 1988Date of Patent: November 14, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takeshi Hojo, Kanshi Yamamoto, Shinichi Kawada, Kazushige Murabayashi, Mamoru Akimoto, Michio Fukano
-
Patent number: 4878754Abstract: A method of and apparatus for measuring any irregularity on a road surface by applying a beam onto a measuring point on the road surface and detecting any change in the vertical position of the center of the beam spot formed on the road surface thereby obtaining data concerning the irregularity on the road surface. The beam spot on the road surface is detected by a unidimensional CCD sensor and the position of the center of the beam spot is determined from the output of the unidimensional CCD sensor. The thus obtained data concerning the position of the center of the spot is suitably processed so that data concerning the irregularity on the road surface is obtained.Type: GrantFiled: October 14, 1987Date of Patent: November 7, 1989Assignee: Tokyo Keiki Co. Ltd.Inventors: Kazuya Homma, Hiroshi Nogi, Koichi Yamada, Masahiro Kitazume, Masamitsu Uzawa, Makoto Aoki
-
Patent number: 4873995Abstract: A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. Electromagnetic waves output from a single electromagnetic wave generating means are branced into a plurality of branched electromagnetic waves, which are respectively employed to conduct hyperthermia treatments for a plurality of patients. The whole of the hyperthermia system is controlled in a concentrated fashion from a single section by means of time-division multiplexing. It is therefore possible for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with each other, even when the conditions of these patients differ from one another. Further, it is advantageously possible to simplify the arrangement of the system as a whole and stabilize the control of the system.Type: GrantFiled: November 16, 1987Date of Patent: October 17, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4868520Abstract: A high-frequency power synthesizing apparatus having a plurality of distributors arranged in a plurality of stages, a plurality of amplifiers which are supplied with outputs from a final stage of said power distributors and which amplify these outputs to a predetermined level, and a power synthesizing unit including initial-stage power synthesizers supplied with outputs from said amplifiers and a final-stage synthesizer which outputs power to an external load. The final-stage power distributors and the initial stage synthesizers are constituted by 0.degree.-hybrid modules. The output level of each amplifier is regulated and made constant by being compared with a predetermined level. The output levels of the amplifiers can be displayed on an external display.Type: GrantFiled: December 16, 1987Date of Patent: September 19, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takashige Terakawa, Noriyuki Akaba, Sadayoshi Hattori
-
Patent number: 4860770Abstract: A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. When it is necessary for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with each other, the control of a plurality of electromagnetic wave outputs and the control of cooking of the surface of a heated region are effected by a centralized control which employs time-division multiplexing. Thus, it is advantageously possible to efficiently carry out a hyperthermia treatment which is fitting for the condition of each of a plurality of patients.Type: GrantFiled: November 16, 1987Date of Patent: August 29, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4857869Abstract: This invention relates to a push-pull transformer for use in a high frequency push-pull amplifier. This push-pull transformer has a coaxial line whose one end is connected to an input terminal, while the other end thereof is provided with an internal conductor and an outer conductor, the internal and outer conductors being grounded through stubs. A capacitor having a proper capacity is connected between the internal conductor and the outer conductor whereby the push-pull transformer can be properly actuated in a low frequency range other than the frequency used without any necessity to enlarge the size of the stubs.Type: GrantFiled: March 17, 1988Date of Patent: August 15, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takashige Terakawa, Noriyuki Akaba, Sadayoshi Hattori
-
Patent number: 4841990Abstract: The applicator of this invention functions as an antenna of electromagnetic waves when used in hyperthermia. The casing of this applicator serves as waveguide.The applicator incorporates in its casing an electromagnetic lens. It is also provided with a cooling mechanism for cooling the body surface of the heated region at an opening of the casing. When electromagnetic waves which have been introduced from outside to the supply portion propagate in the human body from the opening of the casing, energy reflection is generated due to untuned impedance. In order to prevent this reflection, the applicator of this invention incorporates three stub tuners which can be adjusted from outside so as to reduce the loss of energy.The casing of the applicator of this invention is filled with fluid such as machine oil which has a small damping factor so as to reduce the loss of electromagnetic waves in the casing which occurs during its propagation. The three stub tuners are waterproofed at their movable portion.Type: GrantFiled: June 25, 1986Date of Patent: June 27, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4841989Abstract: A very large proportion of electromagnetic waves are reflected by the surface of the human body. To cope with this phenonmenon, the applicator of the present invention incorporates an electromagnetic lens at an electromagnetic wave-radiating end portion thereof, thereby enabling electromagnetic waves propagated in the human body to be gradually focused into a portion of the body to be heated. An omnidirectional electromagnetic lens is employed.Affected parts located at different depths in the body are generally treated by different applicators. However, the applicator of the present invention is constructed so that the electromagnetic lens is replacable. In consequence, only one case for the applicator is required. This makes the use of the applicator easier.For the purpose of providing a small-sized electromagnetic lens and applicator, coolant is made to flow inside the electromagnetic lens.Type: GrantFiled: June 25, 1986Date of Patent: June 27, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4841308Abstract: A slotted waveguide antenna assembly includes a slotted waveguide, a dielectric beam shaper and reflectors which are fixed and held by a holder member.The dielectric beam shaper is formed from a pair of dielectric plate members. The dielectric plate members are so arranged that they are slightly closer at the forward ends than the base ends, thus providing a nonparallel arrangement. The inclination of the dielectric plate members is selected within a range of 0.8.ltoreq.d/D<1 (D: a distance between the dielectric plate members at the base portions, d: a distance between the dielectric plate members at the forward portions).The dielectric plate members have a thickness which produces a phase difference, between electromagnetic waves reflected by inner surfaces of the respectivie dielectric plate members that are opposite each other.Type: GrantFiled: August 8, 1988Date of Patent: June 20, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takashige Terakawa, Mutsumi Takahashi, Noriyuki akaba
-
Patent number: 4831544Abstract: An attitude and heading reference detecting apparatus having three gyros and three acceleometers mounted to a navigation vehicle in such a manner that their input axes are made coincident with principal three axial directions of the navigation object, respectively, a magnetic azimuth sensor, a signal transforming section supplied with the outputs from the three gyros, the outputs from the three accelerometers and the output from the magnetic azimuth sensor, a computing section supplied with the output from the signal transforming section and a signal output section supplied with the output from the computing section, for producing an attitude and heading reference signal and for delivering the same to the outside.Type: GrantFiled: November 17, 1987Date of Patent: May 16, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takeshi Hojo, Kanshi Yamamoto, Mikio Morohoshi, Fuyuki Hame
-
Patent number: 4829312Abstract: The present invention is applied to a slotted waveguide antenna assembly which comprises a slotted waveguide having a plurality of slots, a reflector having an aperture in front of the slotted waveguide and reflecting radiated electromagnetic wave for forming directive beam, and a mounting portion for mounting the antenna assembly onto a place where the antenna assembly is to be installed.In such an antenna assembly, a fixing member is provided on the reflector at a position spaced from the slotted waveguide. The fixing member extends between the opposite walls of the reflector and fixed thereto. The fixing member has an end which projects outwardly from the wall of the reflector to form the mounting portion. The fixing member is sufficiently thin as compared with the working wavelength.The slotted waveguide antenna assembly may have a dielectric wave-guiding arrangement.Type: GrantFiled: January 22, 1987Date of Patent: May 9, 1989Assignee: Tokyo Keiki Co., Ltd.Inventors: Takashige Terakawa, Mutsumi Takahashi, Noriyuki Akaba
-
Patent number: 4779837Abstract: A poppet valve in which a poppet is slidable in a valve body and opens or closes a main valve path for pressurized fluid at one end. The pressurized fluid is conveyed to a back pressure chamber at the rear of the poppet either through a reduced flow path or through a valve arrangement between the surfaces of the poppet and a poppet spool slidable within the poppet. Either a control rod or the poppet spool moving relative to the poppet opens a flow path at the side of the back pressure chamber and the flow continues through a hollow in the spool or the control rod to an oil chamber away from the back pressure chamber where it is released to a tank.Type: GrantFiled: February 10, 1987Date of Patent: October 25, 1988Assignee: Tokyo Keiki Co., Ltd.Inventors: Akio Mito, Saburo Yajima, Kiyoshi Hayashi
-
Patent number: 4747359Abstract: When the right turn or left turn is set by operating one joystick lever, the bow thrustor arranged on the bow side generates the drift thrust in the rightward or leftward direction in accordance with the turning angular velocity on the basis of the operation of the joystick lever. At the same time, the propellers provided on the stern side are controlled so as to generate the backward thrust proportional to the absolute value of the turning angular velocity of the ship. The forward thrust of the ship which is caused due to the generation of the drift thrust by the bow thrustor is suppressed. Thus, the ship is turned to the right or left around the stern as a rotational center at a predetermined speed with the position of the hull held.Type: GrantFiled: August 25, 1986Date of Patent: May 31, 1988Assignee: Tokyo Keiki Co., Ltd.Inventor: Tetsuo Ueno
-
Patent number: 4747416Abstract: A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. When it is necessary for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with each other, the control of a plurality of electromagnetic wave outputs and the control of cooling of the surface of a heated region are effected by a centralized control which employs time-division multiplexing. Thus, it is advantageously possible to efficiently carry out a hyperthermia treatment which is fitting for the condition of each of a plurality of patients.Type: GrantFiled: July 17, 1985Date of Patent: May 31, 1988Assignees: Tokyo Keiki Co., Ltd., Makoto Kikuchi, Shinsaku Mori, Yoshio NikawaInventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4744372Abstract: A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. Electromagnetic waves output from a single electromagnetic wave generating means are branched into a plurality of branched electromagnetic waves, which are respectively employed to conduct hyperthermia treatments for a plurality of patients. The whole of the hyperthermia system is controlled in a concentrated fashion from a single section by means of time-division multiplexing. It is therefore possible for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with each other, even when the conditions of these patients differ from one another. Further, it is advantageously possible to simplify the arrangement of the system as a whole and stabilize the control of the system.Type: GrantFiled: July 22, 1985Date of Patent: May 17, 1988Assignees: Tokyo Keiki Co., Ltd., Makoto Kikuchi, Shinsaku Mori, Yoshio NikawaInventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4741348Abstract: A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. Electromagnetic waves output from a single electromagnetic wave generating device are branched into a plurality of electromagnetic wave outputs, which are respective employed to conduct hyperthermia treatments for a plurality of patients, the level of each of the branched outputs being adjustable. The whole of the hyperthermia system is controlled in a concentrated fashion from a single section by way of time-division multiplexing. It is therefore possible for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with each other, even when the conditions of these patients differ from one another. Further, it is advantageously possible to simplify the arrangement of the system as a whole and provide an even more precise control of the system.Type: GrantFiled: July 26, 1985Date of Patent: May 3, 1988Assignees: Tokyo Keiki Co., Ltd., Kikuchi, Makoto, Shinsaku Mori, Yoshio NikawaInventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4690156Abstract: Coolant liquid is caused to flow through a lens section of an applicator to control the heating of the applicator due to a loss in propagation of the electromagnetic waves in the applicator. Furthermore, in this applicator, device for decreasing the internal loss, device for improving a lens effect to efficiently heat a predetermined portion in a living body, and the like are provided, respectively, as necessary.Type: GrantFiled: March 1, 1985Date of Patent: September 1, 1987Assignees: Tokyo Keiki Co., Ltd., Makoto Kikuchi, Shisaku Mori, Yoshio NikawaInventors: Makoto Kikuchi, Shinsaku Mori, Yoshio Nikawa, Takashige Terakawa
-
Patent number: 4673254Abstract: A back-reflection type light diffusing apparatus of this invention is suitable for use in liquid crystal display panels or the like, and is formed by a light guiding plate. The light guiding plate has one surface which forms a first surface through which light is radiated while its opposite surface forms a second surface on which a light reflecting plate is mounted. The light reflecting plate is provided with non-reflecting portions disposed in such a manner that the area thereof increases the closer it gets to the light source so as to radiate light from the light radiating surface uniformly over its entire area.Type: GrantFiled: July 18, 1986Date of Patent: June 16, 1987Assignee: Tokyo Keiki Co., Ltd.Inventors: Kuniaki Kato, Mutsumi Takahashi
-
Patent number: 4630639Abstract: A differential pressure regulator is arranged in series on the inflow side of a variable throttle for adjustment of a flow rate. An inlet pressure of the variable throttle is led into a primary pilot chamber of the differential pressure regulator. A constant flow control valve is provided in an oil passage connecting an oil passage on the inflow side of the differential pressure regulator with a secondary pilot chamber in order to allow a fluid of a constant flow rate to flow. The inflow side of a sequence valve is connected to the side of the secondary pilot chamber of the differential pressure regulator. The outflow side of the sequence valve is connected to the outlet side of the variable throttle or a tank. The inlet passage of the variable throttle is led into the primary pilot chamber of the sequence valve. An outlet pressure of the variable throttle is led into the secondary pilot chamber of the sequence valve. Further a check valve or a throttle is connected in parallel to the sequence valve.Type: GrantFiled: March 26, 1985Date of Patent: December 23, 1986Assignee: Tokyo Keiki Co., Ltd.Inventors: Yoshisuke Akita, Ichiro Tenmyo, Kiyoshi Hayashi, Kazuyuki Kihara, Akio Mito