Patents Represented by Law Firm Parkhurst, Wendel & Rossi
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Patent number: 5621839Abstract: In order not to vary a light dividing ratio, a light insertion loss and a light extinction ratio, even if an environmental temperature is varied, in a first aspect, an optical waveguide device has at least one optical waveguide substrate made of ferroelectric crystals, an optical waveguide formed in the optical waveguide substrate, a first crystal plane formed in the optical waveguide substrate in which charges of one polarity are generated due to pyroelectrical effects, a second crystal plane made of ferroelectrical crystals in which charges of the other polarity are generated, a first conductive layer formed on the first crystal plane, and a second conductive layer formed on the second crystal plane, wherein the first conductive layer is connected electrically to the first conductive layer.Type: GrantFiled: August 24, 1994Date of Patent: April 15, 1997Assignee: NGK Insulators, Ltd.Inventors: Masato Asano, Tetsuya Ejiri
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Patent number: 5537732Abstract: A composite type magnetic head core slider including a slider body and a core chip, wherein a slot is formed in the slider body such that the slot is open in an end face of the slider body and located within a width of a central recessed portion between two parallel air-bearing portions formed on a surface of the slider body which is to face a magnetic disk, or within a width of an outer recessed portion disposed on one side of one of the air-bearing portions, which one side is remote from the central recessed portion. The core chip is fixed in the slot such that an upper end portion of the core chip protrudes above a surface of the central or outer recessed portion, and the protruding upper end portion of the core chip is subjected to an operation to form a track portion having a magnetic gap.Type: GrantFiled: March 15, 1994Date of Patent: July 23, 1996Assignee: NGK Insulators, Ltd.Inventors: Naoya Fukuda, Soichiro Matsuzawa, Hideto Sandaiji, Eigo Hirotsuji
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Patent number: 5519763Abstract: A communication (comm) apparatus coupled to a telephone (tel) line comprises a base having a tel portion, a fax portion including a fax modem, a first switch for switching the mode between fax and tel, and a first wireless comm portion, and at least a cordless unit having a second wireless comm portion for communicating with the base, and a second fax portion including a recording/reading portion. The cordless unit may further comprise a second tel portion and a second switch for switching the mode between fax and tel wherein the base can change the second switch to the other mode if necessary. A cordless phone may be further provided. In response to a fax call, the base holds the line but the cordless unit does the fax procedure and if there is no response from the cordless unit within a given interval, the line is disconnected wherein each of cordless unit responds with a different delay time to have a priority. During facsimile comm, an erroneous on-hook is neglected.Type: GrantFiled: December 27, 1994Date of Patent: May 21, 1996Assignee: Matsushita Graphic Communication System, Inc.Inventors: Takeshi Namekawa, Masayuki Moteki, Hidenori Hayashi, Yukari Hashibe, Satoshi Fukuda, Ikuo Kitajima
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Patent number: 5519080Abstract: An insulator includes a housing portion. The housing portion is composed a silicone rubber obtained by curing a composition containing diorganopolysiloxane (A) and a fine silicon powder (B) by heating, and a methylalkylpolysiloxane oil (C). The diorganopolysiloxane has at least two silicon atom-bonded alkenyl groups in one molecule. The methylalkyl-polysiloxane oil (C) has each of both terminal ends of each molecular chain blocked with a trialkysiloxy group and possessing a viscosity at 25.degree. C. being 1 to 1,000 centistokes, and is incorporated into the above composition in an amount of 1-100 parts by weight per 100 parts by weight of the component (A).Type: GrantFiled: August 10, 1994Date of Patent: May 21, 1996Assignees: Dow Corning Toray Silicone Co., Ltd., NGK Insulators Ltd.Inventors: Takao Matsushita, Katsuya Baba, Kazuo Hirai, Isao Nakajima, Takayuki Takeda
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Patent number: 5515789Abstract: A single-cable aerial cableway including guide rails forming a lead-in guide, secured to a stationary cable support structure. The lead-in guide cooperates with a wheel secured to the grip so as to stabilize and position the grip and the load before they pass along the structure. The position of the lead-in guide is automatically adjusted when the position in height of the cable changes so that the weel always enter the lead-in guide.Type: GrantFiled: August 1, 1994Date of Patent: May 14, 1996Assignee: Pomagalski S.A.Inventors: Max Brochand, Jean-Pierre Rastello
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Patent number: 5514446Abstract: In order to obtain a honeycomb structural body having excellent mechanical strength, which can eliminate a waste use of a catalyst, incomplete cells at an outermost peripheral portion of the honeycomb structural body are sealed selectively by ceramic materials. An incomplete cell does not have a square cross section if the complete cell has a square cross section, and is preferably defined by the cell having an area not more than 90% as that of the complete cell.Type: GrantFiled: March 9, 1995Date of Patent: May 7, 1996Assignee: NGK Insulators, Ltd.Inventors: Minoru Machida, Koichi Ikeshima
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Patent number: 5512720Abstract: An auxiliary trip device for a circuit breaker which includes an electromechanical actuating device and an energy storage system. The electromechanical actuating device includes a coil housed in a sheath which has a central bore containing a plunger fixed to a push-rod, and a fixed core spaced apart from the plunger, via a first spring. The push-rod is slidable within the bore to actuate a latch device of the energy storage system, which in turn releases a blade which is cooperable with a trip bar of the circuit breaker on which the auxiliary trip device is placed. The blade is biased by a second spring which releases and stores energy greater than released and stored energy of the first spring.Type: GrantFiled: March 30, 1994Date of Patent: April 30, 1996Assignee: Merlin GerinInventors: Patrick Coudert, Jean-Pierre Nereau
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Patent number: 5510758Abstract: A semiconductor device includes a microstrip wiring board. The microstrip wiring board includes a substrate having a main surface, a ground conductor extending on the main surface of the substrate, a dielectric film extending on the ground conductor, and a metal wiring line extending on the dielectric film. A semiconductor chip is connected to the microstrip wiring board via a bump.Type: GrantFiled: April 6, 1994Date of Patent: April 23, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Suguru Fujita, Kazuaki Takahashi, Morikazu Sagawa, Hiroyuki Sakai, Yorito Ota, Kaoru Inoue
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Patent number: 5506831Abstract: Elimination of mis-detection of a front erasure section of reference information for controlling the position of a read/write head on the disk storage device is accomplished, by zoning a part of a disk surface for a specific zone RZ separately from a data storage zone DZ, storing a dummy data Dd in a code pattern with a predetermined repetition cycle in an entire area, excluding areas for reference information storage, of the specific zone RZ, and positioning a read/write head in the specific zone RZ to detect a front erasure section ER of the reference information RI by a reference information read out means 30. The read out means 30 reads out of an identification section ID and a servo information section SI of the reference information RI securely without being confused by fake erasure sections.Type: GrantFiled: May 10, 1994Date of Patent: April 9, 1996Assignee: Fuji Electric Co., Ltd.Inventor: Masahiko Iwahara
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Patent number: 5504542Abstract: In an stereoscopic retinal camera having a photographing optical system capable of photographing a pair of stereoscopic fundus images by dividing a light beam reflected by the fundus of an examinee's eye into two light beams through a two-hole diaphragm, provided are an illuminating optical system for illuminating the fundus of an examinee's eye, an observing optical system for observing the fundus illuminated by the illuminating optical system, a detecting optical system for detecting the luminous flux reflected by the fundus and then directed into the observing optical system, and based on the detected result by the detecting optical system, balance of video signal strength between a pair of the fundus images is judged thereby to take a stereoscopic photograph of the fundus.Type: GrantFiled: October 6, 1994Date of Patent: April 2, 1996Assignee: Nidek Co., Ltd.Inventors: Toshiya Hino, Tsuguo Nanjo, Tokio Ueno
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Patent number: 5504284Abstract: The invention relates to a device for both mechanical and electrical lockout of a remote control unit for a modular circuit breaker. This device includes a retractable ring pivoting around a spindle and provided with a locking nose arranged to cooperate with a stop pin located on the circumference of a drum rotating around a spindle and bearing a manual control handle having two stable positions. The retractable ring bears in addition a rocker designed to actuate a switch fitted on the electrical supply circuit of the remote control unit. This device is advantageous in that it also enables padlocking or sealing of the retractable ring.Type: GrantFiled: January 25, 1994Date of Patent: April 2, 1996Assignee: Merlin GerinInventors: Michel Lazareth, Michel Effosse
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Patent number: 5504290Abstract: A remote controlled circuit breaker including a mechanism linked to a handle by a drive lever equipped with a roller cooperating with a recharging cam of an energy storage system including a spring. A bearing surface is arranged to block the roller in the charged position, without requiring the presence of a special latching stage, since the line of action of the reaction R of the roller passes via the transmission shaft of the cam. A step-by-step motor of the vibrating type drives the transmission shaft in rotation, and enables almost instantaneous stopping of the cam when the roller is in contact with the bearing surface.Type: GrantFiled: February 4, 1994Date of Patent: April 2, 1996Assignee: Merlin GerinInventors: Pierre Baginski, Jean-Pierre Nebon
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Patent number: 5502517Abstract: The present invention was developed to improve wearing conditions of a soft contact lens while improving production efficiency of the soft contact lens and assuring an enhanced optical effect offered by the lens. The present soft contact lens has a back surface, a front surface and a connecting surface. The back surface of the lens is constituted by: a central portion formed by an ellipsoidal surface with an eccentricity in the range of 0.2-0.7 and a vertex radius of curvature in the range of 5.00-10.00 mm; an intermediate portion which is located at the periphery of the central portion so as to surround the central portion and is formed by another ellipsoidal surface with an eccentricity in the range of 0.2-0.Type: GrantFiled: April 26, 1994Date of Patent: March 26, 1996Assignee: Menicon Co., Ltd.Inventors: Naoki Anan, Bungo Takagi, Kazuya Miyamura
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Patent number: 5502365Abstract: A driving control apparatus consists of a battery for storing electric energy supplied to a motor-driven compressor and a drive motor, a direct current detector for detecting a direct current supplied from the battery to the compressor, a direct current voltage detector for detecting a d.c. voltage applied by the battery, a controller for calculating an electric power consumed by the motor-driven compressor, determining an upper limit of the electric power in dependence on the d.c. voltage, judging whether or not the electric power is larger than the upper limit, and controlling the compressor to reduce the electric power in cases where the electric power is larger than the upper limit. Because the upper limit of the electric power is determined in dependence on the d.c. voltage and because the electric power becomes necessarily lower than the upper limit, an electric tar is not stalled by the exhaustion of the electric power in the battery before a driver arrives at his destination.Type: GrantFiled: August 30, 1993Date of Patent: March 26, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuo Nanbu, Makoto Yoshida
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Patent number: 5501892Abstract: In a ceramic part having at least one small hole or both a hollow portion and small hole(s) which extends from the hollow portion to an outside, an edge portion of the small hole(s) is beveled. In a ceramic part having at least one small hole for a cooling mechanism through which a cooling medium is circulated, the surface roughness of an inner surface of the small hole is R.sub.max 7 .mu.m or below. Such a ceramic part having at least one small hole has no chipping or edge around the small hole(s) which can cause breakage at high temperatures and under high pressures, and is thus stronger than a conventional ceramic part. Such a ceramic part is suitable for use at a high temperature, for example, at 1000.degree. C. or above, and is particularly suitable as a gas turbine member, such as a turbine blade or a turbine nozzle of a gas turbine.Type: GrantFiled: December 15, 1994Date of Patent: March 26, 1996Assignee: NGK Insulators, Ltd.Inventor: Shinji Ohtsubo
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Patent number: 5502619Abstract: A heat sink assembly for computer chips includes a base plate, a fan and a combinative heat dissipation unit including a plurality of heat dissipation sheets having a plurality of slots therein and X-shaped washers which are alternatively stacked between the base plate and the fan. The combinative heat dissipation unit has a plurality of through openings from a top surface to a bottom surface thereof and transverse gaps in four side surfaces. The openings and gaps are in air communication thereby the heat generated by computer chips and conducted through the base plate to the combinative heat dissipation unit is rapidly carried away by air flow produced by the fan through the openings and gaps.Type: GrantFiled: December 12, 1994Date of Patent: March 26, 1996Assignee: Tennmax Trading Corp.Inventor: Michael Wang
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Patent number: 5502521Abstract: An ophthalmometric apparatus comprising an eyeball observing device for observing the front part of the eyeball and a measuring unit moving device for moving a measuring unit relative to the eyeball, characterized by: a first optical index forming system that projects a light beam along the optical axis of the eyeball observing device to form a first alignment index in the eyeball; a first optical index detecting system that detects the position of the first alignment index on the basis of the light that travels along the optical axis of the eyeball observing device; a second optical index forming system that projects a light beam on the eyeball along an optical axis inclined at an angle to the optical axis of the eyeball observing device to form a second alignment index in the eyeball; a second optical index detecting system that detects the position of the second alignment index and has an optical axis in a substantially mirror image relation with the optical axis of the second optical index forming systemType: GrantFiled: April 26, 1994Date of Patent: March 26, 1996Assignee: Nidek Co., Ltd.Inventor: Kouki Katou
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Patent number: 5502323Abstract: To widen the width of under layer wiring connected to a source region and to lower the resistance of the under layer wiring in a semiconductor device, a direction connecting a through hole with a contact hole connected to a drain region is tilted by 45 or by 30 over a direction connecting between contact holes for connecting a source region or the drain region. Alternatively, the source region and the a drain region are respectively aligned in parallel stripes, and the through hole and the contact hole for connecting the drain region are aligned in a stripe in which the drain region is aligned.Type: GrantFiled: September 23, 1994Date of Patent: March 26, 1996Assignee: Fuji Electric Co., Ltd.Inventors: Akio Kitamura, Naoto Fujishima
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Patent number: D369441Type: GrantFiled: August 23, 1994Date of Patent: April 30, 1996Assignee: Cebe International S.A.Inventor: Laurent Crestin-Billet
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Patent number: D371384Type: GrantFiled: March 29, 1994Date of Patent: July 2, 1996Assignee: Cebe International S.A.Inventor: Patrick Bonnemere