Patents Examined by Richard K. Lee
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Patent number: 6107909Abstract: An electrical resistor having a resistance value and capable of withstanding high power surges, utilizing a thick film deposited on a substrate and trimmed with one or more cuts configured to maintain a level of current crowding while increasing the resistance value of the resistor. A surge resistor can be modified in a similar fashion.Type: GrantFiled: February 23, 1999Date of Patent: August 22, 2000Assignee: Microlectronic Modules CorporationInventor: John P. Kosinski
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Patent number: 6104274Abstract: A composite PTC material made of cristobalite as a matrix and a conductive filler, having a room temperature resistivity of 10.sup.-1 .OMEGA.cm or less. The conductive filler is at least one substance selected from the group consisting of single metals, metal silicides, metal carbides and metal borides; has a room temperature resistivity of 10.sup.-3 .OMEGA.cm or less when per se made into a sintered material; has particle diameters of 2-50 .mu.m; and is contained in a proportion of 20-35% by volume of the composite PTC material. The composite PTC material has a relative density of 90% or more after firing.Type: GrantFiled: March 5, 1998Date of Patent: August 15, 2000Assignee: NGK Insulators, Ltd.Inventors: Kazuyuki Matsuda, Junko Shibata, Kiyoshi Araki
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Patent number: 6104276Abstract: An FBT (fly-back transformer), its bleeder resistor (installed on the top of the FBT), and a device for coupling the bleeder resistor are disclosed. The bleeder resistor 100 is accommodated within a resistor case 180, and the resistor case 180 is installed on the top of an FBT case 110. A resistor pattern 140 is printed on the substrate 130 of the bleeder resistor 100. Openings 150 are formed within the wavy portions of the resistor pattern 140, and the resistor case 180 has a plurality of isolating sheets 160 within its interior 170, so that the isolating sheets 160 can be inserted into the openings 150. When manufacturing the bleeder resistor, the glass coating, the baking, the epoxy resin dipping are eliminated, but the voltage breakdown resisting property is improved. Further, the manufacturing cost is lowered owing to the simplification of the process.Type: GrantFiled: March 22, 1999Date of Patent: August 15, 2000Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Dae Sung Choi
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Patent number: 6100785Abstract: A voltage nonlinear resistor of a sintered substance of a composite consisting essentially of zinc oxide and containing at least one rare earth element and at least one additional rare earth element selected from the group consisting of Eu, Gd, Tb, Dy, Ho, Y, Er, Tm, Yb, and Lu, and Bi and Sb. Spacing d.sub.n (.ANG.) provided from precipitation grains formed in zinc oxide grains or on a grain boundary lies in the range of 2.85 .ANG..ltoreq.d.sub.1 .ltoreq.2.91 .ANG., 1.83 .ANG..ltoreq.d.sub.2 .ltoreq.1.89 .ANG., 1.77 .ANG..ltoreq.d.sub.3 .ltoreq.1.82 .ANG., 1.56 .ANG..ltoreq.d.sub.4 .ltoreq.1.61 .ANG., 1.54 .ANG..ltoreq.d.sub.5 .ltoreq.1.60 .ANG.. The spacing mentioned here is a spacing obtained according to the Bragg condition in the X-ray diffraction method.Type: GrantFiled: September 25, 1997Date of Patent: August 8, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomoaki Kato, Yoshio Takada, Kei-ichiro Kobayashi, Akio Hori, Osamu Wada, Masahiro Kobayashi, Naomi Furuse, Shinji Ishibe, Mitsunori Hama, Shoichi Shichimiya
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Patent number: 6099334Abstract: A resilient, curved switch terminal is elastically flexed when deflected by a connector pin inserted into a coaxial connector. The switch terminal is sufficiently long to provide a broad range of resiliency that accommodates plug pins of various dimensional tolerances. The switch terminal contacts a fixed terminal in a normally closed contact position. A connector pin in a mating connector opens the normally closed contact while making a new contact through the connector pin. The terminals are long enough to prevent solder flux from flowing to contacting portions. Solder flux residue is avoided on contacting portions and a more reliable contact is obtained. The portion of the switch terminal that contacts the plug pin is slanted to prevent accumulation of any contaminants such as dust or plating residue that enters the coaxial connector. The slanted contact portion also facilitates assembly of the coaxial connector switch.Type: GrantFiled: March 23, 1999Date of Patent: August 8, 2000Assignee: SMK CorporationInventor: Koji Togashi
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Patent number: 6100787Abstract: A multilayer electronic component (200) is provided. The component includes a substrate package assembly (202) with a set of stacked insulated sheets of a dielectric ceramic material (204, 206, 208, 210, 212). Also included are a set of embedded resistors (214), each of the embedded resistors including an electrical input port pad (216) and an electrical output port pad (218) provided in layers between the set of stacked insulated sheets. Each of the insulated sheets has a trough (220) of a predetermined length aligned between and transverse to the electrical input port pad (216) and the electrical output port pad (218). The trough (220) reduces the resistance value variability in the multilayer electronic component (200). The trough (220) is substantially filled with a resistive paste material and an internal circuit (222) connects the embedded resistors inside the substrate package assembly (202). A method of forming the substrate package assembly (202) is also provided.Type: GrantFiled: May 28, 1997Date of Patent: August 8, 2000Assignee: Motorola, Inc.Inventors: Rong-Fong Huang, Robert A. Burr
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Patent number: 6097277Abstract: A resistor network has a substrate with top and side surfaces. Resistors are located on the side surfaces. Several side conductors are located on the side surface and are electrically connected to the resistors. Several top conductors are located on the top surface and are electrically connected to the side conductors. Each top conductor has a cavity. A solder sphere is partially located in the cavity and is electrically and mechanically connected to the top conductor by reflowed solder paste. A cover coat covers the side conductors and the resistors. The resistor network provides a high density of resistors per unit area.Type: GrantFiled: November 5, 1998Date of Patent: August 1, 2000Assignee: CTSInventors: Steven N. Ginn, James N. Hufford, John Zdanys, Jr., Stephen W. Burry, Lewis L. Seffernick, Robert M. VandenBoom
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Patent number: 6094127Abstract: The inventive three-level infrared bolometer includes an active matrix level, a support level, a pair of post and a absorption level. The active matrix level includes a substrate having an integrated circuit, a pair of connecting terminal and a protective layer covering the substrate. The support level includes a pair of bridges, each of the bridges being provided with a conduction line formed on top thereof, wherein one end of the conduction line is electrically connected to the respective connecting terminal. The absorption level includes a serpentine bolometer element surrounded by an absorber, and an infrared absorber coating formed on the absorber and having a rough surface. Each of posts includes an electrical conduit surrounded by an insulating material and is placed between the absorption level and the bridge, in such a way that the serpentine bolometer element is electrically connected to the integrated circuit through the electrical conduit, the conduction line and the connecting terminal.Type: GrantFiled: December 8, 1998Date of Patent: July 25, 2000Assignee: Daewoo Electronics Co., Ltd.Inventor: Yoon-Joong Yong
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Patent number: 6094128Abstract: A fail-safe varistor includes either a fail-short or a fail-open device. Both devices include a fusible, electrically conductive material that melts before the varistor fails due to overvoltage. In the fail-open device, the fusible, electrically conductive material joins separated portions of the leads. The material also may join at least one of the leads directly to a ceramic disk of the varistor. Upon reaching the predetermined temperature, the varistor melts causing a circuit including the varistor to open. In the fail-short device, the material melts creating a short between the leads. This short causes a fuse or a breaker to open the circuit.Type: GrantFiled: August 11, 1998Date of Patent: July 25, 2000Assignee: Maida Development CompanyInventors: John C. Bennett, Ronald D. Boyd, Robert W. Stockum
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Patent number: 6087924Abstract: In a gas sensor which uses CuO as a p-type semiconductor, by adding Na.sub.2 CO.sub.3 in excess of 1 wt % relative to CuO, sensitivity to gases such as H.sub.2, NO, NO.sub.2 and SO.sub.2 is suppressed, whereby selectivity for CO is increased. Sensitivity to CO.sub.2 can also be obtained. In addition, by adding a sodium salt of tungstic acid or molybdic acid, CO.sub.2 sensitivity can be made lower than the CO sensitivity, and CO gas in the exhaust gases discharged from gas-fired water heaters or other combustion equipment can be selectively detected. It is therefore possible to detect incomplete combustion.Type: GrantFiled: December 15, 1997Date of Patent: July 11, 2000Assignees: Mikuni Corporation, Osaka Gas Co., Ltd.Inventors: Kazuhisa Hasumi, Kentaro Nagano, Hideyuki Horiuchi, Osamu Okada
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Patent number: 6078250Abstract: A resistor element has a ceramic body with a first outer electrode and a second outer electrode formed on its mutually opposite externally facing end surfaces and a plurality of mutually oppositely facing pairs of inner electrodes inside the ceramic body. Each of these pairs has a first inner electrode extending horizontally from the first outer electrode and a second inner electrode extending horizontally from the second outer electrode towards the first outer electrode and having a front end opposite and separated from the first inner electrode by a gap of a specified width, these plurality of pairs forming layers in a vertical direction. The gap of at least one of these plurality of pairs of inner electrodes is horizontally displaced from but overlapping with the gaps between the other pairs of inner electrodes. For producing such a resistor element, the distance of displacement is set according to a given target resistance value intended to be had by the resistor element.Type: GrantFiled: February 8, 1999Date of Patent: June 20, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Yukiko Ueda, Masahiko Kawase, Norimitsu Kitoh
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Patent number: 6078247Abstract: In conventional multi-direction input devices, the operating shaft is formed as a cylinder by machining using a lathe or the like, so that the machining takes a lot of time, resulting in a rather high cost.Disclosed is a multi-direction input device in which the operating shaft 14 is formed of a plate material by stamping using a press or the like, so that the operating shaft has a substantially rectangular cross-sectional configuration, where it is possible to produce a large number of operating shafts 14 in a short time and with high dimensional accuracy, therefore achieving a reduction is cost.Type: GrantFiled: July 29, 1998Date of Patent: June 20, 2000Assignee: Alps Electric Co., Ltd.Inventor: Hisato Shimomura
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Patent number: 6075437Abstract: A magnetic field sensor device is disclosed comprising two substantially identical n-doped, high carrier mobility semiconductor films (e.g., InSb films) each containing a pattern of cylindrical holes or antidots that cause the resistance of the respective films to vary depending upon the direction of the in-plane component of an applied magnetic field.Type: GrantFiled: March 9, 1998Date of Patent: June 13, 2000Assignee: General Motors CorporationInventors: Joseph Pierre Heremans, Jihui Yang
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Patent number: 6072382Abstract: A magnetic field sensor having a junction structure in a sensor cell using a dielectric intermediate separating material with two major surfaces on one of which is a base anisotropic ferromagnetic thin-film which is also on a base electrode, and on the other of which there is at least one of a plurality of separate anisotropic ferromagnetic thin-film but of differing rotational responses to external magnetic fields. Similar structures have a separated film in each that can be interconnected to one another with the interconnections extending at least in part substantially parallel to the widths of the separated films, and the separated films can have lengths with gradually narrowing widths to the ends thereof as can the base electrode. One or more planar coils can be supported at least in part on the separated films.Type: GrantFiled: January 6, 1999Date of Patent: June 6, 2000Assignee: Nonvolatile Electronics, IncorporatedInventors: James M. Daughton, Mark C. Tondra, Arthur V. Pohm
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Patent number: 6069553Abstract: A layered electrical resistor having flat components stacked as follows: a first metal outer plate, a first thin outer electrical insulator, a first thin sheet metal resistor element, a first thin inner insulator, a metal midplate, a second thin inner insulator, a second thin sheet metal resistor element, a second thin outer insulator and a second metal outer plate. The stacked components are compressed together by rivets or otherwise. Each sheet metal resistor element is stamped, punched or otherwise cut with at least first and second terminals and interconnected ribbons forming a resistive path therebetween. A thermal fuse or other circuit breaker is thermally engaged with a seat on the midplate and is connected in a series circuit with the resistor elements to open the circuit to prevent overheating thereof. Structural tie bars are formed integrally with ribbons and terminals of the resistor elements and are severable therefrom before assembly of the components.Type: GrantFiled: October 9, 1997Date of Patent: May 30, 2000Assignee: Indak Manufacturing Corp.Inventors: Charles E. Black, III, Daryn L. Waite
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Patent number: 6067005Abstract: A compact, low-cost pad pointing device with improved performance, reliability and durability, having an integrated selection switch, that can be used as a cursor pointing device and selection mechanism for computers, remote controls, web TV, TV guide browsers, video games, consumer electronics, industrial controllers, medical, automotive and other applications. A contact surface can be deflected to positions on an electrical medium that results in the generation of speed and direction signals while a selection switch may be simultaneously activated through the same control element.Type: GrantFiled: May 7, 1999Date of Patent: May 23, 2000Inventor: Dean R. DeVolpi
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Patent number: 6062872Abstract: A high-speed connector for interconnecting circuit boards to a backplane or interconnecting a mother board to daughter board. The connector includes a housing, biasing elements, a flex film, conductive elastomeric contact modules and biasing modules. The conductive elastomeric contact modules comprise a substrate which includes a plurality of individual conductive elastomeric contacts such as Metallized Particle Interconnect (MPI), or a polymer containing a plurality of conductive particles disposed therein. The first side of the conductive elastomeric contact modules interface to the flex film, and the second side of the conductive elastomeric contact module interface to a printed circuit board (PCB) set of contacts. Alternately, the conductive elastomeric contacts could be molded directly onto the flex film to eliminate the conductive elastomeric contact modules.Type: GrantFiled: March 19, 1999Date of Patent: May 16, 2000Assignee: Thomas & Betts International, Inc.Inventors: Andrew H. Strange, Wayne S. Alden, III
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Patent number: 6054917Abstract: The present invention relates to a rotatively driven type electric component wherein a slider is moved linearly by rotation of a screw. The rotatively driven type electric component with housings, a drive shaft held by the housings and provided with a screw portion, an insulating substrate held by the housings and having electrically conductive patterns, a slider which comes into sliding contact with the electrically conductive patterns, a movable block which holds the slider, and a plate spring disposed between the movable block and the drive shaft and locked to the movable block, the plate spring having a protuberance, the protuberance of the plate spring being brought into elastic contact with the screw portion of the drive shaft so that the movable block is moved with rotation of the drive shaft.Type: GrantFiled: March 24, 1999Date of Patent: April 25, 2000Assignee: Alps Electric Co., Ltd.Inventor: Masahiro Asano
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Patent number: 6045399Abstract: A combination outlet strip includes a casing and a plurality of outlet strip units connected in series and mounted in the casing, each outlet strip unit having a bottom shell, a top shell covered on the bottom shell, and three bus bars mounted in between the bottom shell and the top shell, the bus bars each having a coupling hole and a stud at two opposite ends outside the top and bottom shells, and a plurality of clamping strips for receiving the blades/grounding prongs of electric plugs, the outlet strip units being connected in series by fastening the studs of the bus bars of one outlet strip unit to the coupling holes of the bus bars of another outlet strip unit.Type: GrantFiled: November 18, 1998Date of Patent: April 4, 2000Inventor: Tsung-I Yu
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Patent number: 6045414Abstract: The electrical connector includes a male element traveling within a female element, the male element having a cantilevered C-clamp arm opposing a C-clamp element formed on the female element. A spacer includes a planar surface with a passageway through which at least a portion of the male and female elements pass thereby slidably interlocking the male and female element to each other. The spacer further includes a wire spacer which travels between the clamp arms and separates the conductors to be clamped. Ledges are formed on the male and female elements to limit travel of the male element with respect to the female element and to limit travel of the spacer with respect to the male element. A bolt passing through the female element and threadably engaging the male element secures the male element to the female element so that the clamp arms clamp conductors as separated by the wire spacer.Type: GrantFiled: March 12, 1999Date of Patent: April 4, 2000Assignee: Maclean Power SystemsInventor: Robert DeFrance