Patents Assigned to Harada Kogyo Kabushiki Kaisha
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Patent number: 5262792Abstract: A shortened non-grounded type ultrashort antenna including an antenna element, an electrostatic coupling element electrostatically coupled to the antenna element, a rectangular first metal member with one end thereof connected to the electrostatic coupling element and an other end thereof extending in a direction perpendicular to the axis of the antenna element, a second rectangular metal member provided underneath and in parallel and spaced apart from the first metal member and having one end thereof connected to the extending end of the first metal member and a feeder line connected to the first and second metal members.Type: GrantFiled: September 11, 1991Date of Patent: November 16, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Yoshimi Egashira
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Patent number: 5245349Abstract: A flat-plate patch antenna including a ground plate, a radiating element provided on the ground plate with a feeder cable connected thereto, and a wave guide element provided to face the radiating element with a space in between, the wave guide element being movable parallel to the ground plate.Type: GrantFiled: December 22, 1989Date of Patent: September 14, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Takuji Harada
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Patent number: 5239304Abstract: A three-wave vehicle antenna in which an insulating pipe is connected to the tip of a conducting pipe, and an MT wave antenna element and a coaxial MT wave matching device are housed in the insulating pipe. One end of the coaxial MT wave feeder cable is connected to the matching device and the other end is guided through the conductive pipe which is designed to be used as an AM/FM antenna. The coaxial MT wave feeder cable uses polytetrafluoroethylene, at least for the external insulation member, for covering the outer conductor. With this arrangement it is possible for the three-wave vehicle antenna to check decreases in sensitivity of the AM/FM wave antenna element, since it is feasible to lower the stray capacity between the conductive pipe and the outer conductor of the coaxial MT wave feeder cable without enlarging the diameter of the conductor pipe.Type: GrantFiled: May 21, 1990Date of Patent: August 24, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Yoshimi Egashira
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Patent number: 5237335Abstract: A whip antenna for vehicles including a feeder terminal directly coupled to the base of the whip antenna element. The coupled portion is inserted into a cylindrical attachment base, and the cylindrical attachment base is filled with an insulating material so that the insulating material envelopes the entire coupled portion with the pointed tip end of the feeder terminal exposed from the insulating material.Type: GrantFiled: January 17, 1992Date of Patent: August 17, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Heizo Tsuchida
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Patent number: 5231408Abstract: A compensating/amplifying device for a window glass antenna for an automobile. The device utilizes heating wires, which remove fog formed on the automobile window glass, as an antenna and includes band-pass filter coils interposed between a battery of the automobile and the heating wires, and the band-pass filter coils and a floating capacity between the heating wires and ground are used as a part of an input band-pass filter of a compensating amplifier.Type: GrantFiled: February 19, 1992Date of Patent: July 27, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Kazuhiko Nakase
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Patent number: 5173716Abstract: A device for driving telescopic power antenna for vehicles including a drive cylinder connected to an antenna motor, a driven cylinder which is concentrical with the drive cylinder and controls the extension and retraction of the antenna when rotated by the drive cylinder, and a transmisson mechanism interposed between the drive an driven cylinders. The transmission mechanism includes a projection formed on the drive cylinder, a circular groove formed on the driven cylinder, a coil spring installed in a manner to expand and contract in the direction of the length of the groove, and a pair of arc shaped cores installed in the coil spring. The coil spring and the cores ae compressed by a specific displacement-pressure relationship when the projection moves along the groove and presses one end of the coil spring when a relative rotation occurs between the drive and driven cylinders.Type: GrantFiled: February 1, 1991Date of Patent: December 22, 1992Assignee: Harada Kogyo Kabushiki KaishaInventor: Kiyoshi Tetsuka
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Patent number: 5151708Abstract: An automobile mast antenna used in a state shorter than its resonant state including an FM compensating circuit made only of passive elements and compensating for FM signals and an AM compensating circuit made of active elements that convert high impedance into low impedance and compensating for AM signals. The FM compensating circuit is formed with a primary resonance circuit and a secondary resonance circuit, in which the primary resonance circuit resonates in FM band via impedance of an antenna mast and loading coil which is attached to the antenna mast, and the secondary resonance circuit resonates in FM band via a coil and capacitor. The primary and secondary resonance circuits are coupled by electrostatic capacitance of attachment section of the antenna mast so as to form a double-tuned circuit.Type: GrantFiled: November 15, 1990Date of Patent: September 29, 1992Assignee: Harada Kogyo Kabushiki KaishaInventors: Kazuhiko Nakase, Moriyoshi Kawasaki
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Patent number: 5124714Abstract: A plane antenna for automobiles including a peripheral conducting surface, a first inner conducting surface provided in the peripheral conducting surface with a space in between, a second inner conducting surface provided in the first inner conducting surface with a space in between. A core conductor of a first coaxial line is connected to the first inner conducting surface and an outer skin of the first coaxial line is connected to the peripheral conducting surface, and a core conductor of a second coaxial line is connected to the second inner conducting surface and an outer skin of the second coaxial line is connected to the first inner conducting surface. The second coaxial line can be divided into two sections so that these sections are inductively connected to each other by coils.Type: GrantFiled: November 2, 1989Date of Patent: June 23, 1992Assignee: Harada Kogyo Kabushiki KaishaInventor: Takuji Harada
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Patent number: 5118905Abstract: A coaxial cable is disclosed that employs a plain stitch wire tube formed by braiding a plurality of flattened individual solid metal conductors. The plain stitch wire tube obtained by braiding the flattened conducting wires acts as an external conductor. The coaxial cable may be used, for example, as a feeder cable for an automobile antenna. The coaxial cable thus obtained provides improved shielding against inductive interference and can be manufactured at a lower cost compared with conventional cables.Type: GrantFiled: November 18, 1988Date of Patent: June 2, 1992Assignee: Harada Kogyo Kabushiki KaishaInventor: Jiro Harada
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Patent number: 5105201Abstract: A glass mounted antenna for car radio including an antenna element having a length that is in a resonant or non-resonant state with respect to FM frequencies, resonance circuits made up with spiral coils and capacitors so as to resonate in the FM band, a band-pass filter that passes only FM signals and no AM signals, and an AM impedance converter having an active element converting high-impedance signals into low impedance signals.Type: GrantFiled: June 26, 1990Date of Patent: April 14, 1992Assignee: Harada Kogyo Kabushiki KaishaInventors: Kazuhiko Nakase, Moriyoshi Kawasaki
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Patent number: 5101213Abstract: A screw type coupling device includidng a male screw element formed by installing a coil spring form helical component on the outer surface of a columnar element and a female screw element formed by installing a coil spring form helical component in a tubular element so that the two helical components are screw engaged with each other. With the application of such coupling device to an antenna for vehicles, the antenna having the male screw element at the base is removably attached to a vehicle body by screwing the male screw element of the antenna to the female screw element installed in the vehicle body.Type: GrantFiled: November 22, 1989Date of Patent: March 31, 1992Assignee: Harada Kogyo Kabushiki KaishaInventors: Jiro Harada, Heizo Tsuchida
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Patent number: 5097188Abstract: A control device which raises and lowers a motorized automobile antenna by means of an antenna up-down switch, the power supply for a motor which drives the antenna being cut off when the antenna has reached its highest or lowest point and such a position of the antenna is detected. By supplying a voltage from the automobile ignition key to a control circuit when the antenna up-down switch is in a neutral position, the antenna is operated by the antenna up-down switch only when the automobile ignition key is on, and when the automobile ignition key is switched off, the antenna is retracted by a trigger which is actuated when the input of the control circuit reaches zero.Type: GrantFiled: December 11, 1990Date of Patent: March 17, 1992Assignee: Harada Kogyo Kabushiki KaishaInventors: Kazuhiko Nakase, Yuji Maeda
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Patent number: 5068673Abstract: A clutch for telescopic antenna including a disk shape clutch element and a shallow, cylindrical clutch element facing each other. The cylindrical clutch element is provide with a recess on its inner wall, and the disk shape clutch element is provided with a pair of sliding contacts which are urged in the radial directions and can come into contact with the inner wall surface of the cylindrical clutch element. An engagement ball provided in one of the sliding contacts can engage with the recess of the second element, securing the coupling of the two clutch elements.Type: GrantFiled: June 26, 1990Date of Patent: November 26, 1991Assignee: Harada Kogyo Kabushiki KaishaInventor: Misao Kimura
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Patent number: 5061939Abstract: A flat-plate antenna for use in mobile communications including a ground plate, a table-shape frame made up with a conductive top plate and connecting members which electrically connect the top plate to the ground plate, a capacitor electrode installed between the top plate and ground plate so as to resonate the table shape frame, and a strip line resonator installed under the table shape frame and is provided with a capacitor electrode for resonating the strip line resonator, the capacitor electrode being positioned beneath the central area of the top plate.Type: GrantFiled: May 22, 1990Date of Patent: October 29, 1991Assignee: Harada Kogyo Kabushiki KaishaInventor: Kazuhiko Nakase
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Patent number: 5030964Abstract: A telescopic antenna for use in vehicles including an antenna element which has a cap on its tip and a removable locking element at its base, an antenna housing which is mounted to the vehicle body and has an insertion hole for removably housing the antenna element therein, and a fastener provided on the antenna element and screwed in to the antenna housing for fastening the antenna element thereto. When the fastener is unscrewed and the antenna element is removed from the antenna housing, the fastener can be removed from the antenna element after the locking projection is dismounted from the antenna element regardless of the size of the cap so that the fastener is reusable.Type: GrantFiled: November 28, 1989Date of Patent: July 9, 1991Assignee: Harada Kogyo Kabushiki KaishaInventor: Takeshi Nakanishi
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Patent number: 5019830Abstract: An FM wave antenna including a coaxial cable, a parallel conductor which are provided parallel to a metal conductor such as a vehicle body and an amplifier provided between the coaxial cable and the parallel conductor. The coaxial cable is made up of a central core and inductive outer sheath and one end of the inductive outer sheath is connected to the metal conductor, and one end of the parallel conductor is also connected to the metal conductor. The amplifier amplifies signals from the parallel conductor and inductive outer sheath of the coaxial cable and outputs amplified signals to the central core of the coaxial cable.Type: GrantFiled: March 13, 1989Date of Patent: May 28, 1991Assignee: Harada Kogyo Kabushiki KaishaInventor: Takuji Harada
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Patent number: 4990836Abstract: In a motorized automobile antenna control device for an antenna system wherein an antenna is raised when power supply of a radio receiver is switched on and lowered when the power supply is switched off, the antenna is prevented from being lowered for a predetermined period of time, for example two to ten seconds, after the power supply of the radio receiver is turned off by a timer so that unnecessary raising and lowering motions of the antenna are prevented when an ignition switch of an automobile is turned on.Type: GrantFiled: December 7, 1988Date of Patent: February 5, 1991Assignee: Harada Kogyo Kabushiki KaishaInventors: Kazuhiko Nakase, Kazufumi Sato
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Patent number: D320601Type: GrantFiled: May 8, 1989Date of Patent: October 8, 1991Assignee: Harada Kogyo Kabushiki KaishaInventor: Shoji Harada
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Patent number: D336301Type: GrantFiled: May 8, 1989Date of Patent: June 8, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Shoji Harada
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Patent number: D336649Type: GrantFiled: May 8, 1989Date of Patent: June 22, 1993Assignee: Harada Kogyo Kabushiki KaishaInventor: Shoji Harada