Plural Winding Type Patents (Class 335/246)
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Patent number: 7400223Abstract: A magnet configuration comprising a superconducting magnet coil system (M) and a current path (P) which comprises parts of the magnet coil system (M), wherein at least two electric connecting points (A1, A2, A3, A4) are disposed on the current path (P), which define a section (PA1-A2, PA2-A3, PA3-A4) within the current path (P), wherein the section (PA1-A2, PA2-A3, PA3-A4) does not comprise all parts of the magnet coil system (M) contained in the current path (P), and comprising a resistive element (WA1-A2, WA2-A3, WA3-A4) having an electric resistance value ?0, and at least two contacts (K1, K2, K3, K4), wherein the contacts (K1, K2, K3, K4) are disposed between the resistive element (WA1-A2, WA2-A3, WA3-A4) and one connecting point (A1, A2, A3, A4), is characterized in that in the superconducting state of the magnet coil system (M), an electric contact (K1, K2, K3, K4) between an electric connecting point (A1, A2, A3, A4) and a resistive element (WA1-A2, WA2-A3, WA3-A4) can be closed and opened.Type: GrantFiled: August 16, 2006Date of Patent: July 15, 2008Assignee: Bruker Biospin AGInventors: Rolf Spreiter, Robert Schauwecker, Pierre-Alain Bovier
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Patent number: 7019308Abstract: A device for influencing an electron beam, for example a beam deflecting device in an electron beam lithography machine, comprises a beam influencing coil (13) operable to influence an electron beam (EB) in the vicinity of the device by way of a magnetic field and a heat dissipation compensating coil (14) operable to provide a heat output so compensating for any change in heat dissipation of the device due to operation of the beam influencing coil (13)—particularly variable operation to vary the field intensity or to create and remove a field—as to reduce the amount of change, preferably to maintain the net heat dissipation at a constant value. The compensating coil (13) can be controlled, for example, by measurement (19) of the heat dissipation of the device and calculating (18) current supply (16) to the coil (13) in dependence on the measured dissipation.Type: GrantFiled: September 1, 2004Date of Patent: March 28, 2006Assignee: Leica Microsystems Lithography Ltd.Inventor: Andrew Dean
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Patent number: 5323134Abstract: A solenoid comprising a first coil positioned within a frame from which a magnetizable armature, having a coil end and a free end, extends, the coil end of the armature having a section of non-magnetizable material secured to it, and a second coil, which coil is energizable in a manner independent from that of the first coil, the second coil being secured to the other end of the non-magnetizable material so as to move with the armature from a position adjacent the first coil when the armature is in extended position to a position spaced therefrom when the armature is in retracted position, whereby when the first coil is energized to move the armature along its throw into retracted position, the second coil is simultaneously energized so as produce a repulsive magnetic force with respect to that of the first coil.Type: GrantFiled: March 18, 1993Date of Patent: June 21, 1994Inventors: David Patterson, Albert Patterson
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Patent number: 5291170Abstract: An electromagnetic actuator having an integral calibration mechanism for easy adjustment of armature response times. An additional (secondary) coil is incorporated into the device for providing a magnetic field opposing the magnetic field produced by the actuator's primary coil. A variable resistive element, used in conjunction with the secondary coil, provides a means for adjusting the current flow through the secondary coil and thereby the strength of the resultant magnetic field experienced by the armature. Since an is armature's response is proportional to the strength of the magnetic field to which it is subjected, this invention provides a means of calibrating the armature response times of an actuator. The availability of establishing a uniform, desired response results in improved multiple actuator system functionality and more reliable actuator interchangeability.Type: GrantFiled: October 5, 1992Date of Patent: March 1, 1994Assignee: General Motors CorporationInventors: Brent J. Wahba, Paul B. Rissi
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Patent number: 5010310Abstract: A relay apparatus which comprises an armature, means for pivotally mounting the armature, first and second pole pieces dimensioned, configured and disposed for cooperation with the armature, a magnetic circuit including at least one coil, a plurality of iron shunt lamina spanning the magnetic circuit intermediate at least one of the coil and the first and second pole pieces, and a plurality of copper washer slugs in the magnetic circuit intermediate at least one of the first and second pole pieces and the iron shunt lamina. The invention also includes a method of immunizing a relay from alternating current.Type: GrantFiled: June 16, 1988Date of Patent: April 23, 1991Assignee: General Signal CorporationInventor: Klaus H. Frielinghaus
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Patent number: 4951916Abstract: Herein disclosed a disc type electromagnetic valve which is disposed in the passage of a fluid represented by pressurized gases or air for controlling the flow of the fluid. In a casing at the back of a stator, there is formed a chamber in which a diaphragm is arranged. This diaphragm has its radially inner side connected to either a movable receiver of a spring for biasing an armature apart from the attracting surface of the stator or the armature. The chamber at the back of the diaphragm is caused to communicate with a communication passage of the pressurized fluid through a passage hole which extends through the armature and a valve member. When the pressure of the fluid exerted upon the valve member fluctuates, the diaphragm is moved to automatically adjust the seating force of the valve member against a valve seat.Type: GrantFiled: November 20, 1989Date of Patent: August 28, 1990Assignee: Diesel Kiki Co., Ltd.Inventors: Yasumasa Kanameda, Takeo Kushida
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Patent number: 4673163Abstract: An electromagnetic actuator in which a stator and an armature are opposed to move relatively. A plurality of coils are provided on the stator in the radial direction. A slit is formed on the armature in a radial direction and the flow of the eddy current in the circumferential direction is prevented.Type: GrantFiled: December 30, 1985Date of Patent: June 16, 1987Assignee: Diesel Kiki Co., Ltd.Inventors: Takeo Kushida, Keiichi Yamada
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Patent number: 4412196Abstract: A solenoid operated directional valve comprises a plug-in type solenoid which makes electrical connection with a terminal block on the valve body via plug-in type terminals. The plug-in type terminals are on a connector element which is selectively positionable on the solenoid to select either a portion of the solenoid winding which is for 60 hertz energizing current or a portion which is for 50 hertz current.Type: GrantFiled: April 8, 1982Date of Patent: October 25, 1983Assignee: Double A Products CompanyInventor: Rainer Teichert
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Patent number: 4166261Abstract: An electromagnet including a magnetizable yoke, an exciter coil system, and a movable armature. The end surface of at least one pole shoe carried by the yoke is divided into at least two discontinuous partial surfaces separated by a space. At least one control coil system includes a coil at least partially within the space and arranged to produce magnetic flux passing through the partial surfaces in opposite directions.Type: GrantFiled: September 12, 1977Date of Patent: August 28, 1979Assignee: Maschinenfabrik Augsburg-Nurnberg AktiengesellschaftInventors: Peter Meinke, Gerhard Flachenecker