Discharging Or Preventing Accumulation Of Electric Charge (e.g., Static Electricity) Patents (Class 361/212)
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Patent number: 6026512Abstract: A static electricity dissipation garment where the body of the garment is constructed of fabric within which is woven strands of carbon. The body will be constructed as a smock or as a pant suit. The pant suit garment includes a pair of side seams located between the torso section of the garment and down each leg section of the garment. The smock includes a similar pair of side seams in the torso section. A first embodiment of the garment includes sleeve seams that extend along the entire length of each sleeve of the garment and then along the connection of the sleeve to the upper part of the torso section and then along the collar of the garment. Within each of these seams, along the entire length of the seam, is included an electrically conductive ribbon. The ribbon of the side seam is designed to overlap a substantial length of the sleeve seam. The ribbons of the two sleeve seams and side seams overlap each other in the area of the collar.Type: GrantFiled: October 14, 1997Date of Patent: February 22, 2000Inventor: David L. Banks
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Patent number: 6014773Abstract: A monitored static electricity dissipation garment which is to be connected to a voltmeter which is to display to the wearer of the garment the amount of static electricity that is on the body of a human and garment at any given instant. The monitor can be located separate from the garment or can be worn on the garment. When using the garment of the present invention, it is preferred that the human user wear electrically conductive boots that have electrically conductive soles which function to dissipate static electricity to an electrically conductive floor. Such boots and floor are deemed to be conventional.Type: GrantFiled: December 10, 1998Date of Patent: January 18, 2000Inventor: David L. Banks
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Patent number: 6016246Abstract: The present invention in some embodiments provides for an apparatus comprised of a conductive strap and a lotion dispensing device connected to the conductive strap. The lotion dispensing device is comprised of a lotion storage device such as a reservoir, a permeable membrane, or a sponge. Preferably a person would put on the conductive strap and the lotion dispensing device in order to eliminate or reduce the transmission of static discharge to electronic circuitry and to minimize static discharge events that could interrupt the operation of electronic systems. The conductive strap includes a plurality of holes and the plurality of holes. The permeable membrane may be of a material, which dispenses lotion from the permeable membrane at a rate which is increased with heat. The size of holes in the conductive strap may increase in response to greater heat levels. The lotion dispensing device may be comprised of a reservoir filled with lotion.Type: GrantFiled: December 14, 1998Date of Patent: January 18, 2000Assignee: Lucent Technologies Inc.Inventors: George Theodore Dangelmayer, Louis F. DeChiaro, John Philip Franey, Min-Chung Jon
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Patent number: 6008978Abstract: A method and system for eliminating electrostatic charge of a processing section in which a processed object is transferred along a predetermined path for receiving treatment. An electrostatic charge eliminating member, arranged independently of the processing section, is transferred along the path of the processed object to eliminate the electrostatic charge of the processing section.Type: GrantFiled: April 27, 1998Date of Patent: December 28, 1999Assignee: Tokyo Electron LimitedInventor: Kiyohisa Tateyama
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Patent number: 6008979Abstract: An instrument (12) separated from ground by a supradissipative resistance and having a surface (26) which is placed in electrical contact with a magnetic head of a disc drive assembly includes an electrically conductive receptacle (134) engaging and electrically connected proximate to the surface (26) of the instrument (12). The electrically conductive receptacle (134) is electrically coupled to ground for grounding the instrument (12) to prevent damage to the magnetic head caused by static discharge from the instrument (12).Type: GrantFiled: October 16, 1997Date of Patent: December 28, 1999Assignee: Seagate Technology, Inc.Inventors: C. Fred Mykkanen, S. Ross Ambrose
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Patent number: 6004462Abstract: Resin having a susceptibility to electrostatic charge which is opposite in polarity to the susceptibility to electrostatic charge of a filter sheet or member forming a filter element is impregnated into the filter member. For example, when the filter member is composed of polyester of 50-70 weight percentage and glass fiber of 5-25 weight percentage as well as pulp of 15-35 weight percentage, resin composed of phenol resin of 5-20 weight percentage and melamine resin of 80-95 weight percentage is impregnated into the filter member so that the susceptibility to electrostatic charge of the filter member can be neutralized. Thus, static electricity generated by friction between the filter element and fuel flowing therethrough can be controlled.Type: GrantFiled: June 27, 1996Date of Patent: December 21, 1999Assignee: Nippondenso Co., Ltd.Inventors: Katsuhisa Yamada, Kingo Okada, Kouji Izutani, Kenji Okabe
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Patent number: 6002572Abstract: The processing apparatus prevents difficulty in separation of the substrate from the base because of charges on the substrate when the substrate is lifted from the base for substrate placing during processing. The processing apparatus comprises pins to lift up the substrate on the base and a neutralization apparatus to discharge ionized gas to the gap between the bottom of the substrate lifted from the base by the pins and the top of the base. When ionized gas is discharged to the substrate and the base, the charges are neutralized.Type: GrantFiled: March 24, 1998Date of Patent: December 14, 1999Assignee: Tokyo Electron LimitedInventors: Osamu Hirose, Tetsuya Sada
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Patent number: 5999397Abstract: The present invention discloses a method for preventing electrostatic discharge damages to an article that is made of an insulating material and stored in a container also made of an insulating material by maintaining a minimum safe distance between the article and the top lid of the container such that a saturation electric field cannot be reached at such safety distance and thus electrostatic discharge does not occur. The present invention novel method can be utilized in carrying any insulating articles but is particularly suitable for carrying a quartz reticle in a polycarbonate pod.Type: GrantFiled: October 27, 1997Date of Patent: December 7, 1999Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Ming-Fa Chen, Shih-Shiung Chen, Ying-Chen Chao
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Patent number: 5991922Abstract: A monitored static electricity dissipation garment which is to be connected to a voltmeter which is to display to the wearer of the garment the amount of static electricity that is on a human's body at any given instant. The monitor can be located separate from the garment or can be worn on the garment. When the monitor is worn on the garment, it is necessary that the human user wear electrically conductive boots that have electrically conductive soles which function to dissipate static electricity on an electrically conductive floor.Type: GrantFiled: December 17, 1997Date of Patent: November 30, 1999Inventor: David L. Banks
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Patent number: 5988796Abstract: A recording head is structured so that its elements are not easily destructed by the fusion of wiring due to electrostatic discharge, and a recording apparatus uses such recording head. A part of GND wiring on a wiring board is exposed. A base plate and the GND wiring on the wiring board is electrically connected by caulking a caulking pin arranged for such exposed portion. The resistance of the connected path is made lower than that of wires and others on a heater board. Also, even in a case where the base plate and the GND wiring on the wiring board are not directly in contact, the exposed portion of the GND wiring on the wiring board and the base plate are arranged to be extremely close to each other, hence making it possible to form such a low-resistance path.Type: GrantFiled: July 28, 1995Date of Patent: November 23, 1999Assignee: Canon Kabushiki KaishaInventor: Akihiro Yamanaka
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Patent number: 5991145Abstract: An EDS tester is combined with an employee identifier and recording monitor so as to provide and audit trail of compliance with the fact of ESD testing and, if desired, a record of the ESD test results such as body resistance or charge. In one illustrative embodiment, a fingerprint identifier pad is used together with the ESD test to identify a unique biological characteristic of the worker being tested. In addition, the feature of providing physical contact with the workers body typically required for ESD testing may be combined with the fingerprint identifier pad thereby enabling the ESD test results to be correlated with a specific individual.Type: GrantFiled: August 24, 1998Date of Patent: November 23, 1999Assignee: Lucent Technologies Inc.Inventors: James T. Lagrotta, Richard T. Lagrotta
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Patent number: 5973903Abstract: Fuel lines aboard aircraft are safeguarded against buildup of electric charges. A series of metallic tubes each having opposite open metallic tube ends are prepared for such fuel lines. External metallic ferrules are prepared for the opposite metallic tube ends of these metallic tubes. Each of these metallic ferrules is equipped with an electric discharge terminal for electric charges. Each metallic ferrule is bonded externally to a metallic tube end so that each metallic ferrule and a margin of that metallic tube end extend in one piece circumferentially around an inside of that metallic tube end and axially in one piece for an axial width of that metallic ferrule. External electric conductors extend between electric discharge terminals of adjacent metallic ferrules along the fuel line.Type: GrantFiled: December 12, 1997Date of Patent: October 26, 1999Assignee: TransDigm, Inc.Inventor: Reggie Joe Tomerlin
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Patent number: 5969626Abstract: A device and method for monitoring the integrity of a ground connection between an electrostatic apparatus and earth ground. The device and method provide for continuous monitoring of the connection. The device includes an audible and visual alarm if there is a fault in the grounding connection. It also provides an audible and visual alarm if a DC power supply falls below a specified value. A switch is provided for testing the circuit manually to ensure its proper operation.Type: GrantFiled: October 8, 1997Date of Patent: October 19, 1999Assignee: Altera CorporationInventor: Joe Maciel
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Patent number: 5963415Abstract: An electrostatic discharge protection device is disclosed for use with a magnetic read-write transducer. The electrostatic discharge protection device electrically interconnects the conductive elements of magnetoresistive and inductive heads to provide a low resistance conductive path placing the conductive elements at a substantially equal electrical potential thus minimizing electrostatic discharge. The electrostatic discharge protection device provides an electrical path between the conductive elements which is manually or automatically removable upon connection to a mating element. The electrostatic discharge protection device has a resilient inward biased to connect the electrically conductive elements such that a ground is established between them and is removed automatically upon insertion of the conductive elements into a mating receptacle which is interposed between the conductive elements and the electrostatic discharge protection device or is manually disconnected.Type: GrantFiled: July 5, 1997Date of Patent: October 5, 1999Assignee: Polaroid CorporationInventor: Arnold W. Johansen
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Patent number: 5959827Abstract: An electrically conductive grounding unit is situated between the integrated lead suspension and the tool block which is used to assemble it to the transducer head. The grounding unit grounds the uninsulated traces on the integrated lead suspension, thereby eliminating the danger of imparting static electricity to the transducer head during the assembly process. The grounding unit carries unwanted charges from the electrical traces on the suspension to the grounded tool block. The grounding unit is preferably fabricated from ceramic materials.Type: GrantFiled: July 1, 1998Date of Patent: September 28, 1999Assignee: International Business Machines CorporationInventors: Darrick T. Smith, Timothy Scott Hughbanks
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Patent number: 5959828Abstract: A coupling for preventing the buildup of static electricity between adjacent conduits includes a sleeve enclosed by pivotally connected semicircular segments. The semicircular segments are in electrical contact with first and second conduits via bonding wires. The semicircular segments, bonding wires, and/or flanges are coated with a hard metallic ductile conductive coating, which is preferably a boron-nickel coating, to provide electrical conductivity between the conduits. The coupling may be entirely coated with the boron-nickel coating, or selectively coated to provide the required electrical conductivity between the conduits. The conduits include flanges mounted on the ends thereof. Each flange is selectively coated with a hard anodized, dry-lube, thin-film non-conductive, or other insulating coating to reduce or prevent arcing on the interior of the coupling under lighting strike or other hazardous electrical conditions.Type: GrantFiled: June 17, 1997Date of Patent: September 28, 1999Assignee: HydraflowInventors: Jeffrey M. Lewis, Stanley R. Field
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Patent number: 5953199Abstract: The present invention offers a touch pad cover for the touch pad of a Laptop/Notebook computer whereby the touch pad is protected from environmental conditions such as static electricity, particularly the static charge of a computer monitor when the computer is in a closed position and from the static charge transferred by the user, thus reducing the likelihood of a malfunctioning computer touch pad. These, as well as other objects of the invention, are accomplished by a cover for a touch pad of a Laptop/Notebook computer, the computer having a touch pad and an upper portion; the cover comprising an upper surface of nonconductive material (e.g. neoprene) in contact with the upper portion of the computer when the computer is in a closed position; a lower surface of nonconductive material opposite and parallel the upper surface, the lower surface in contact with the touch pad of the computer and depositing a powder residue of nonconductive material on the touch pad.Type: GrantFiled: October 14, 1997Date of Patent: September 14, 1999Inventor: Steve Owens
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Patent number: 5952931Abstract: A wrist-strap monitoring system includes a first wrist-strap monitoring circuitry and a second wrist-strap monitoring circuitry. The first wrist-strap monitoring circuitry is used to monitor continuously impedance of a first human body to be between an upper level and a lower level. The second wrist-strap monitoring circuitry is used to monitor continuously impedance of a second human body to be between the upper level and the lower level. A logic circuit is responsive to the first and second wrist-strap monitoring circuitry for generating an alarm signal. A sound device is responsive to the alarm signal for generating an audible signal. Further, there is provided a ground detection circuit operatively connected to a ground connection for monitoring continuity of the ground connection.Type: GrantFiled: January 5, 1998Date of Patent: September 14, 1999Assignee: Seagate Technology, Inc.Inventors: Terapat Chotichanon, Prasong Yingprasert
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Patent number: 5939993Abstract: A method and device for monitoring the production of a high voltage for use in electrostatic application of a coating product, the high voltage being produced by a generator and the monitoring being performed by a circuit for measuring an electrical parameter associated with the high voltage, together with verifying operation of the circuit immediately following start-ups of the generator.Type: GrantFiled: July 10, 1996Date of Patent: August 17, 1999Assignee: Sames S.A.Inventors: Jean-Pierre Burtin, Flavien Dobrowolski
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Patent number: 5930105Abstract: Ionizing method and apparatus includes a pair of inverters to supply ionizing voltages to ionizing electrodes only during alternate halves of a duty cycle in which one inverter is actuated to operate at high oscillating frequency while the other inverter is inactive, and thereafter in an alternate half of the duty cycle in which the one inverter is inactive and the other inverter is actuated to operate at high oscillating frequency. Each inverter includes a return current path that combines in a common return path in which return currents may be monitored for selective control of one or both of the inverters. Small step-up transformers and other components operating at high oscillation frequency promote confined packaging of high voltage generators for convenient mounting adjacent a pair of ionizing electrodes to reduce lengths of heavily-insulated high-voltage cables between generators and electrodes.Type: GrantFiled: November 10, 1997Date of Patent: July 27, 1999Assignee: Ion Systems, Inc.Inventors: Ira J. Pitel, Mark Blitshteyn, Petr Gefter
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Patent number: 5910878Abstract: Electrical devices such as leaded electronic components, i.e., components with extended input/output leads, are loaded in a magazine that protects them from electrostatic discharge. Each component is held in a component holder with a conductive shorting or discharge pad, comprising a bundle of conductive filaments within a conductive foraminous web that can be moved into contact with the leads to protect them from electrostatic discharge, and moved away from the leads to allow access for testing or processing. At a testing or processing station, the magazine is placed on a mating base and the devices are supported and positioned by supports on the magazine and base. Upon completion of a testing or processing sequence, the magazine can be separated from the base and moved to another testing or processing station, where the magazine is placed on another base.Type: GrantFiled: June 26, 1997Date of Patent: June 8, 1999Assignee: International Business Machines CorporationInventors: Alfred A. Mello, Donald L. Pearl
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Patent number: 5898560Abstract: A device and method for removing a static charge from electrically non-conductive fluids includes a metallic enclosure 12 that receives fluid flow therethrough, a conductive member 18 in said enclosure 12, engaging the conductive member 18 with the fluid flow and grounding the conductive member 18.Type: GrantFiled: July 17, 1997Date of Patent: April 27, 1999Inventors: Donald G. Flaynik, Jr., Michael R. Colburn
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Patent number: 5898559Abstract: An apparatus and method for neutralizing electrostatic charges in non-conductive pipe, such as polyethylene pipe used in natural gas pipelines, which provides a simple and inexpensive apparatus and method to discharge, or otherwise neutralize, electrostatic charges in existing, as well as new, pipelines without requiring specialized pipe or extensive modification of existing pipelines. An apparatus according to the invention includes a housing having inlet and outlet openings and defining a hollow interior portion containing an anti-static cartridge having a cationic substance associated therewith, which, when installed in-line in a gas pipeline, functions to disperse microscopic cationic particles into the gas stream, which particles are carried through downstream pipeline components and neutralize static electrical charges accumulating on said pipeline components.Type: GrantFiled: July 10, 1997Date of Patent: April 27, 1999Assignee: Ionix Technologies, Inc.Inventor: Dirk S. Smith
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Patent number: 5898576Abstract: A printed circuit board including a terminated power plane is described. Specifically, the power-ground plane construction includes a dielectric layer, a power plane having a peripheral edge, and a ground plane. The ground plane is spaced from the power plane by the dielectric layer, and is positioned in an opposed relationship to the power plane. The power-ground plane construction also includes a termination element coupling the power plane, at or adjacent the peripheral edge thereof, to the ground plane so as to terminate the power plane. In one embodiment, a plurality of termination elements couple the power plane, at or adjacent the peripheral edge thereof, to the ground plane. The termination elements are spaced from each other at substantially regular intervals. In another embodiment, a termination element is a strip or sheet element coupling continuous lengths of the peripheral edge of the power plane to ground plane.Type: GrantFiled: November 12, 1996Date of Patent: April 27, 1999Assignee: Bay Networks Inc.Inventors: John J. Lockwood, Edward J. Pavlu, III
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Patent number: 5898268Abstract: Apparatus (10, 30, 60) and a method for generating low energy electrons (26, 46) for neutralizing charges (16, 36, 66) accumulated on a wafer (14, 34, 64) is provided. The apparatus includes a photocathode (24, 44, 67) located within a predetermined distance from the wafer (14, 34, 64), and a light source (20, 40, 70, 76, 86) operable to emit a light (22, 42, 72, 78, 88) striking the photocathode (24, 44, 67), the photocathode (24, 44, 67) generating a cloud of low energy electrons (26, 46) with a narrow energy distribution near the wafer (14, 34, 64).Type: GrantFiled: March 7, 1997Date of Patent: April 27, 1999Assignee: Texas Instruments IncorporatedInventors: Wylie K. Moreshead, Billy B. Hutcheson
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Patent number: 5894399Abstract: An ESD clip for protecting an integrated circuit against electrostatic discharge comprises two mutually opposed pressure bodies interconnected by a spring for short-circuiting connection pins of the integrated circuit. The pressure bodies of the ESD clip are pressed against one another by the spring and in that the pressure bodies are coated with an electrically conducting supporting material. Only minimal mechanical moments are thus exerted on the connection wires of an integrated circuit, so that they are not or hardly deformed.Type: GrantFiled: December 12, 1996Date of Patent: April 13, 1999Assignee: U.S. Philips CorporationInventors: Ching K. Wong, Franciscus C. Van Dorst
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Patent number: 5892651Abstract: An electronic apparatus in which grounding can be achieved between a casing of the main body portion of the apparatus and a slide tray mounted on the casing for being extracted forwards via an opening surface of the casing. To this end, the electronic apparatus includes a slide tray 3 mounted on the casing 2 of the main body portion of the apparatus for being extracted forwards via an opening surface 7 of the casing and carrying electrical components in need of electrical conduction with respect to the main body portion, and an electrically conductive ejection plate 9 electrically conductively connected with an electrically conductive main body portion of a tray 6 and supported on the slide tray for movement in the fore-and-aft direction. The electronic apparatus also includes an electrically conductive roll 17 supported via an electrically conductive spring plate 15 on the ejection plate 9 and adapted for rolling on an electrically conductive bottom plate 18 of the casing of the main body portion.Type: GrantFiled: February 19, 1997Date of Patent: April 6, 1999Assignee: Sony CorporationInventor: Toshiyuki Arai
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Patent number: 5877932Abstract: The inner lining for a tank holding an explosive and flammable liquid, such as gasoline, includes a gasoline-resistant inner envelope (6) and an intermediate layer (5) contacting it between the inner envelope and an interior wall of the tank. The intermediate layer (5) is air-permeable and electrically conductive. The inner envelope (6) has a diffusion-proof outer layer (6a) on its side facing the tank wall and an electrically conductive inner layer (6b) on its inside facing the interior of the tank.Type: GrantFiled: August 13, 1996Date of Patent: March 2, 1999Assignee: Wuelfing+Hauck GmbH+Co. KGInventor: Erich Hauck
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Patent number: 5877933Abstract: An electrostatic discharge protection device is disclosed which selectively shunts charge accumulation across electrical conductors emplaced within the device housing. A grounding element is provided on the housing surface which maintains electrical contact with the enclosed electrical conductors so as to form a shorting shunt and place the conductors at substantially similar electrical potentials. The grounding element may be reversibly changed from the operative into an inoperative position to remove the grounding element from electrical contact with the electrical conductors.Type: GrantFiled: April 16, 1997Date of Patent: March 2, 1999Inventors: Arnold W. Johansen, David V. Cronin
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Patent number: 5854733Abstract: A static charge eliminating lingerie organizer comprising a plurality of individual lingerie storage pouches wherein each lingerie storage pouch is dimensioned to store therein at least one lingerie garment and wherein each lingerie storage pouch attracts static charge of the at least one lingerie garment stored therein. A grounding pouch dimensioned to received the plurality of individual lingerie storage pouches and neutralize the static charge.Type: GrantFiled: December 11, 1997Date of Patent: December 29, 1998Inventor: Gloria B. Jerkins
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Patent number: 5851437Abstract: Positive static electricity charges in air flow from an air washer generated by an industrial process are reduced and controlled to a desired level by treatment of the water circulating in the air washer with an anionic polymeric material such as water soluble, neutralized polyacrylate.Type: GrantFiled: April 22, 1997Date of Patent: December 22, 1998Assignee: BetzDearborn Inc.Inventors: Bobby J. Brown, Bruce K. Fillipo, David M. Polizzotti, Gregory J. Pomrink
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Patent number: 5850585Abstract: A destaticizer which is adapted to remove electric charges from the surface of a photoreceptor by exposing the photoreceptor surface to light. The destaticizer includes a light source, and a light guide member for generally uniformly guiding light from the light source to a light exposure area on the photoreceptor. In accordance with one embodiment, the light guide member is an elongated member, which has an end face serving as a light receiving face for receiving the light emitted from the light source, a light transmitting path for transmitting the light received by the light receiving face, and a plurality of reflecting portions arranged along the length of the light guide member for reflecting the light transmitted through the light transmitting path in a direction intersecting the length of the light guide member.Type: GrantFiled: October 15, 1997Date of Patent: December 15, 1998Assignee: Mita Industrial Co., Ltd.Inventors: Masahiro Tsutsumi, Kazuhisa Edahiro, Yuichiro Hisakawa, Eiji Nimura, Hidekazu Shono
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Patent number: 5835332Abstract: This invention relates to a portable grounding mat, and more particularly to a mat specifically designed to protect electrical workers by providing a zone of equi-potential. The mat comprises a flexible base to which is attached at least two conductive elements laid out in a continuous pattern.Type: GrantFiled: April 25, 1997Date of Patent: November 10, 1998Inventors: Richard White, Ted Krossa
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Patent number: 5831783Abstract: A power source control circuit prevents a generation of a spark between a magnetic head and a magnetic disk by accurately controlling an electric potential provided to the magnetic head. A signal processing circuit provides to the magnetic head an intermediate electric potential between a positive source voltage and a negative source voltage supplied by a power source unit. A first circuit provides the positive and negative source voltages to the signal processing circuit. A second circuit controls one of the positive and negative source voltages in response to a reference voltage fed back from the signal processing circuit. The reference voltage is provided from the signal processing circuit to the magnetic head for setting the head at the intermediate electric potential.Type: GrantFiled: April 15, 1996Date of Patent: November 3, 1998Assignee: Fujitsu LimitedInventor: Tohru Shinohara
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Patent number: 5825606Abstract: The electrostatic protection consists in a protective sheet incorporated in the set between the shell and the elements to be protected, the sheet comprising a conductive layer and an insulating layer, the sheet being cut to the appropriate shape, and being made of materials, such as a foam made of a plastics material, that make it easily formable so that it fits the shape of a space left empty to receive it inside the set. The conductive layer is a thin sheet of metal or of metal fibers.Type: GrantFiled: July 17, 1996Date of Patent: October 20, 1998Assignee: Alcatel Mobile PhonesInventors: Jean-Christophe Villain, Alain Bezieres
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Patent number: 5821797Abstract: A protection circuit (1) for input comprises two transistors (11, 12) connected in series between a first voltage supply (V.sub.cc) and a second voltage supply (GND), and an intermediate junction point is used as an input terminal and an output terminal. When a surge voltage is applied to the input terminal, since terminals (51, 53) of the two transistors (11, 12) are connected to predetermined junction points in such a way that the transistors can operate as bipolar transistors or cause punch through phenomenon (without causing breakdown operation of a low response speed to surge voltage), the surge voltage can be absorbed at high speed, thus increasing anti-ESD (electro static discharge) rate. Further, a protection circuit for power supply comprises two transistors (31, 32) connected in parallel to each other between a first voltage supply (V.sub.cc) and a second voltage supply (GND).Type: GrantFiled: March 29, 1996Date of Patent: October 13, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Masanori Kinugasa, Ryuji Fujiwara
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Patent number: 5812357Abstract: An electrostatic discharge protection device is provided for use with a magnetic read/write transducer. The electrostatic discharge protection device electrically interconnects the conductive elements of magnetoresistive (MR) and inductive heads to provide a low-resistance conductive path placing the conductive elements at a substantially equal electrical potential, thus minimizing electrostatic discharge. The electrostatic discharge protection device provides an electrical path between the conductive elements which is manually or automatically removable upon connection to a mating element. The electrostatic protection device has a resilient inward bias to connect electrically conductive elements such that a ground is established between them and is removed automatically upon insertion of the conductive elements into a mating receptacle which is interposed between the conductive elements and the electrostatic discharge protection device.Type: GrantFiled: October 11, 1996Date of Patent: September 22, 1998Assignee: Polaroid CorporationInventors: Arnold W. Johansen, David V. Cronin
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Patent number: 5812358Abstract: A pipe body sheathed with a film of plastic resin. A strip of conductive plastic resin is along the entire length of the pipe body and made integral with the resin film by extrusion. The conductive strip readily discharges static electricity that may develop in a structure made of said pipes. They are connected to have their conductive strips end-to-end, thereby grounding the so built structure.Type: GrantFiled: April 10, 1996Date of Patent: September 22, 1998Assignee: Yazaki Industrial Chemical Co. Ltd.Inventors: Hisaji Kawai, Shuji Yoshino
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Patent number: 5805406Abstract: A device for treating hair comprises an electrically driven blower for generating an air flow at at least one opening on the device with view to drying the hair, as well as a unit for emitting ions from one or more emitters positioned in or close to the opening of the device. The unit for emitting ions has at least two emitters which are adapted to emit ions of positive charge and of negative charge, respectively, at the same time.Type: GrantFiled: January 21, 1997Date of Patent: September 8, 1998Inventor: Kirsten Herl.o slashed.v Mailand
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Patent number: 5801464Abstract: A spindle motor assembly which utilizes a ionized air bearing to provide a conductive path through the assembly. The spindle motor assembly includes a spindle shaft that is located within a housing and rotated by an internal motor. The assembly also contains an air bearing which allows relative movement between the spindle shaft and the housing. The air bearing is supplied by a source of air that is ionized by an ionizer. The ionized air provides a conductive path between the spindle and the housing. The spindle may be coupled to a clamp that holds a magnetic disk within a disk certifier. The magnetic disk is electrically grounded to the housing through the chuck, the spindle and the ionized air bearing.Type: GrantFiled: December 13, 1996Date of Patent: September 1, 1998Assignee: Phase MetricsInventor: Blasius Brezoczky
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Patent number: 5777400Abstract: A secure computer network switch, wherein a network switch is enclosed in a material which not only reflects electromagnetic waves but also absorbs them. This arrangement keeps all network signals confined to the switch enclosure and prevents electromagnetic radiation from the network cable connections. This allows a single computer to have access to multiple networks without vulnerability to theft or unauthorized disclosure of data between the networks.Type: GrantFiled: July 22, 1996Date of Patent: July 7, 1998Inventor: Stephen W. Bouthillier
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Patent number: 5777479Abstract: An apparatus and method for simulating a lightning strike on a test specimen without causing contaminants to be deposited on the test specimen. The apparatus includes an electrode and an ionizing element electrically coupled thereto. The ionizing element has a substrate coated with an ionizing material and extends between the electrode and an outer surface of a test specimen so as to define an air gap therebetween. The ionizing element is coupled at a first end to the electrode and has a distal or free end which extends toward the test specimen for carrying an electrical test charge thereto. The test charge is developed by a generator electrically coupled to the electrode. The ionizing element is utilized to develop a long arc channel between the electrode and the outer surface of the test specimen. The ionizing element serves to transmit the electrical test charge to the test specimen without depositing contaminants on the test specimen while closely simulating a natural lightning strike.Type: GrantFiled: October 29, 1996Date of Patent: July 7, 1998Assignee: McDonnell Douglas CorporationInventor: Brian P. Kuhlman
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Patent number: 5768086Abstract: A portable static voltage dissipation device configured to be transported on a users person is provided. The device of the present invention includes a hollow, preferably impact resistant, translucent housing. The housing is impact resistant to prevent damage from coming to electronic devices retained therein. Electrically conductive end caps are coupled to first and second ends of the housing. The end caps provide a grasping location for the user. A resistor to prevent excessive current from flowing from the user to inhibit the user from receiving an electrical shock, is coupled to an end cap and an electrostatic voltage discharge indicating device is connected to the resistor and the remaining end cap. The indicating device provides a visual indication that a charge of electrostatic voltage accumulated in the body of the user has been discharged by the device.Type: GrantFiled: October 11, 1996Date of Patent: June 16, 1998Inventor: Michio Abe
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Patent number: 5754389Abstract: A static electricity grounding strap for connecting a person to electrical ground comprising a clasp body having two clasping means to fasten a strap belt of conductive materials. In one embodiment of the present invention, the clasping means is made of non-conductive material. The electrical connection path is conducted via a single conductive plate from the strap belt, a fitting means and a grounding cord to ground. The conductive plate can also be divided into two conductive section separated by a non-conductive partition to provide a dual-loop grounding paths. In another embodiment, the clasping means is made of conductive materials and no additional conductive plates are needed.Type: GrantFiled: November 26, 1996Date of Patent: May 19, 1998Inventor: Shih-Min Hsu
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Patent number: 5746621Abstract: A plurality of electrostatic discharge protection devices are disclosed for use with semiconductor chip packages of a type having a top surface, a bottom surface, and disposed between the top surface and the bottom surface a plurality of lateral surface with extending therefrom a plurality of connector pins disposed thereon. The electrostatic discharge protection devices disclosed herein are heat sensitive in that they automatically withdraw from electrical contact with the connecting pins upon introduction of sufficient heat such as that of soldering. In addition, disclosed herein is a electrostatic discharge protection device for manual withdrawal should the electrostatic discharge protection be required after the soldering process has been terminated.Type: GrantFiled: June 14, 1996Date of Patent: May 5, 1998Assignee: Polaroid CorporationInventor: David V. Cronin
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Patent number: 5719739Abstract: A static eliminator for eliminating static electricity between the human body and a charged object or from the charged object itself. Static electricity is introduced from a charged object into a discharger for discharging the static electricity by an electrical discharge and an exothermic device for eliminating the static electricity as heat. Thus, static electricity is consumed by electrical discharge and generation of heat.Type: GrantFiled: January 29, 1996Date of Patent: February 17, 1998Inventor: Noboru Horiguchi
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Patent number: 5715536Abstract: A static electricity dissipation garment where the body of the garment is constructed of fabric within which is woven the strands of carbon. The garment includes a pair of side seams located between the torso area of the garment and down each leg section of the garment. The first embodiment of the garment includes sleeve seams that extend along the entire length of the sleeve of the garment and along the connection of the sleeve to the upper torso and then along the collar of the garment. Within each of these seams, along the entire length of the seam, is included an electrically conductive ribbon. The ribbon of the side seam is designed to overlap a substantial length of the sleeve seam. The ribbons of the two sleeve seams and side seams overlap each other in the area of the collar. An appropriate electrical connector is connected to the ribbon of at least one side seam.Type: GrantFiled: December 26, 1996Date of Patent: February 10, 1998Inventor: David L. Banks
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Patent number: 5715143Abstract: A carrier system for an integrated circuit carrier assembly composed of a carrier member supporting an integrated circuit. The carrier system enables a number of carrier assemblies to be flexibly and sequentially interconnected, so as to form a flexible and continuous chain of carrier assemblies. The carrier system is characterized by interconnecting the carrier assemblies with a single tape that facilitates accurate alignment and placement of the carrier assemblies within the carrier system, and minimizes the risk of an adhesive buildup on the equipment used to handle the carrier system and separate the carrier assemblies from the carrier system.Type: GrantFiled: July 22, 1996Date of Patent: February 3, 1998Assignee: Delco Electronics CorporationInventors: John W. McHugh, Patricia Louise Jones
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Patent number: 5710692Abstract: In a reproduction machine, a static elimination device for removing static charge from a sheet of material being conveyed along a sheet path through a sheet handling machine. The static elimination device includes a thin flexible support member having a first length suitable for spanning across the sheet path, and a first width defining an area with the first length for supporting a static charge removing member. The static charge removing member has a second length substantially equal to the first length of the support member, and a second width greater than the first width of the support member, and is mounted to the support member. In particular, the static removing member comprises a conductive fabric for mounting in a static removing relationship with a sheet being conveyed along the sheet path of the sheet handling machine. The fabric consists of innumerable thin fibers forming fabric segments.Type: GrantFiled: July 1, 1996Date of Patent: January 20, 1998Assignee: Xerox CorporationInventors: Dennis N. Muck, Stefan A. Jasinski, Frank A. Grossi, Frank R. Papalia
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Patent number: 5694286Abstract: A lightning protection apparatus having a tower which is grounded to the earth, an electronic device mounted onto an area adjacent a top of the tower, and a negative ion production device electrically connected to the area of the top of the tower. The negative ion production device serves to produce solely negative ions around and over the electronic device. An auger rod engages the earth so as to be conductively connected to the earth, and an electrical line serves to connect the auger rod to the tower. A shield member is connected to the tower and extends over the electronic device. The negative ion production device is connected to the shield member so as to pass negative ions through the shield member. The negative ion production device can be one or more batteries that are connected together and having a negative terminal connected to the tower and a positive terminal connected to the electronic device.Type: GrantFiled: September 23, 1996Date of Patent: December 2, 1997Inventors: William J. Fowler, Benjamin P. Fowler