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Magnetic brake assembly

Patent Number: 8111122
Publication Date: 2012-02-07
Inventor: Richeson, William E.

A powdered metal electromagnetic is provided that has much less variance between units, increased frictional drag, reduced wear of itself and the brake drum disk during use and an increased resistance to moisture due to the use of a donor material that increases performance and reliability. In addition it can withstand much higher surface speeds while producing higher frictional ...

Actuator

Patent Number: 8111121
Publication Date: 2012-02-07
Inventors: Hamelinck, Roger Franciscus Mattheus Maria; Rosielle, Petrus Carolus Johannes Nicolaas

The invention relates to an actuator comprising a leaf spring attached to a carrier in at least one point of attachment, means for providing a magnetic field and means for guiding the magnetic field so as to provide a magnetic flux loop. A movable part of the leaf spring is movable relative to the means for providing the magnetic field. The actuator further comprises a drive core attached to the movable part of the leaf spring, which is incorporated in the flux loop, for imparting the ...

Electronic device

Patent Number: 8111120
Publication Date: 2012-02-07
Inventors: Chen, Chia-Hung; Chang, Yuan-Te

An electronic device having two cases and a display module disposed therebetween is disclosed. Magnets are disposed at the two cases and the display module. When an acceleration sensed by a sensing unit of the electronic device is larger than a threshold value. The display module may be suspended via the magnetic repellent between the magnets disposed at the display module and the magnets disposed at two ...

Reed switch apparatus and method of using same

Patent Number: 8111119
Publication Date: 2012-02-07
Inventor: Gilmore, Glendell N.

A reed switch apparatus utilizes one or more reed switches to communicate with one or more devices. In one configuration, the reed switch apparatus utilizes a single magnetic field to, simultaneously activate two or more reed switches. In another configuration, two or more reed switches, each acting independent of one another are simultaneously activated by a single magnetic field. Additionally, a method of controlling at least two devices includes exposing a reed switch apparatus to a ...

Multi-stable micro electromechanical switches and methods of fabricating same

Patent Number: 8111118
Publication Date: 2012-02-07
Inventors: Receveur, Rogier; Danzl, Ralph B.; Habets, Philippe; Mattes, Michael F.; Houben, Richard P. M.

A micro electromechanical (MEMS) switch suitable for use in medical devices is provided, along with methods of producing and using MEMS switches. In one aspect, a micro electromechanical switch including a moveable member configured to electrically cooperate with a receiving terminal is formed on a substrate. The moveable member and the receiving terminal each include an insulating layer proximate to the substrate and a conducting layer proximate to the insulating layer opposite the ...

Electromagnetic relay

Patent Number: 8111117
Publication Date: 2012-02-07
Inventors: Fukui, Norio; Sanada, Hironori; Minowa, Ryota

An electromagnetic relay includes an electromagnetic block formed by winding a coil around an iron core and a frame shaped card. One end portion of the frame-shaped card is engaged with a movable iron piece that is rotated by being attracted to and separated from a magnetic pole portion of the iron core based on excitation and non-excitation of the electromagnetic block. The electromagnetic relay also includes a contact mechanism portion configured to be driven by the other end portion of ...

Solenoidal magnets having supported outer coils

Patent Number: 8106736
Publication Date: 2012-01-31
Inventor: Calvert, Simon James

In a solenoidal electromagnet arrangement for a magnetic resonance imaging system, annular inner coils and annular end coils are provided, all concentrically aligned about an axis, the end coils being placed at axial extremities, axially outside of the inner coils. A pair of annular outer coils are provided concentrically aligned about the axis. An arrangement is provided retaining the pair of outer coils against an axial force urging the outer coils away from one another. The arrangement ...

Electromagnetic attachment apparatus

Patent Number: 8106735
Publication Date: 2012-01-31
Inventor: Li, Zhan-Yang

An electromagnetic attachment apparatus includes a power supply, an electromagnet module, and a rotatable module. The electromagnet module includes a coil and a core positioned in the coil. A mounting panel is attached to the core. A pair of electrically conductive blocks is attached to the mounting panel, and connected to the coil. The rotatable module is rotatably attached to the mounting panel, and includes a pair of electrically conductive pins connected to positive and negative ...

Adjustable mid air gap magnetic latching solenoid

Patent Number: 8106734
Publication Date: 2012-01-31
Inventor: Gruden, James M.

A magnetic latching solenoid comprises a housing, a moveable magnetically permeable member, a stationary magnetic assembly, a counter flux generator; and, a spring. A substantially equal extent of the moveable magnetically permeable member and stationary magnetic assembly along results in an air gap interface being essentially mid-way between the opposite axial extremities of the moveable magnetically permeable member and stationary magnetic assembly, thereby enhancing an attracting force ...

Switch and recording medium

Patent Number: 8106733
Publication Date: 2012-01-31
Inventors: Nakasuji, Masaki; Sawai, Jun; Oya, Noboru; Shimosato, Tsutomu; Ikeyama, Chiaki

A switch has a detection portion that contains a magnetic-field-sensing element and an attraction member. The attraction member generates a magnetically attracting force. The detection portion generates a switching signal based on an output of the magnetic-field-sensing ...

Relay

Patent Number: 8106732
Publication Date: 2012-01-31
Inventor: Takano, Satoshi

A relay includes a base and a switch built into the base. A first terminal that is built into the base, is connected to one end of the switch, and is provided on a bottom of the base, a second terminal that is built into the base, is connected to the other end of the switch, and is provided on the bottom, and a third terminal that is connected to the first terminal in the base, is provided on a top of the base. No other terminal is provided on the ...

Electromagnetic switch for starter

Patent Number: 8106731
Publication Date: 2012-01-31
Inventors: Yamane, Yasuyuki; Nishikawa, Yoshihiro; Yamauchi, Hayato; Nakayama, Haruki

There is provided an electromagnetic switch, for a starter, that is capable of preventing a defect caused by the formation of a leakage circuit between the battery terminal and the motor terminal, even in the case where the electromagnetic switch is flooded with water. On the outer surface of a switch cap, there is provided a diaphragm disposed between the battery terminal and the motor terminal that are arranged in such a way as to be exposed outside the switch cap; the diaphragm is formed ...

Microswitching device and method of manufacturing the same

Patent Number: 8106730
Publication Date: 2012-01-31
Inventors: Nguyen, Anh Tuan; Nakatani, Tadashi; Ueda, Satoshi

A microswitching device includes a base, a fixed portion joined to the base, a movable portion extending along the base and having a fixed end fixed to the fixed portion, a movable contact electrode film provided on a side of the movable portion opposite the base, a pair of fixed contact electrodes joined to the fixed portion and having a region opposing the movable contact electrode film, a movable driving electrode film provided on a side of the movable portion opposite the base, and a ...

Electromagnetic relay

Patent Number: 8102227
Publication Date: 2012-01-24
Inventors: Matsumoto, Hiroshi; Tashiro, Masahiko; Fujiwara, Tetsuya; Takahashi, Yasusuke; Hiroki, Kazuchika

The present invention provides an electromagnetic relay that can achieve desired operation characteristics by simple and inexpensive construction even if it has a small thickness. Therefore, a movable iron piece 20 is rotated by excitation or non-excitation of an electromagnet, a movable contact piece 43 is elastically deformed through a card 21, and a movable contact 46 opens and closes fixed contacts of fixed contact pieces. The movable iron piece 20 is ...

Protection device with a sandwiched cantilever breaker mechanism

Patent Number: 8102226
Publication Date: 2012-01-24
Inventors: Finlay, Sr., David A.; Murphy, Patrick J.; Weeks, Richard; Richards, Jeffrey C.; Morgan, Kent R.

The present invention is directed to a protective electrical wiring device that includes a housing assembly having a plurality of receptacle terminals comprising hot user-accessible terminal structure and a neutral user-accessible terminal structure accessible via at least one user-accessible receptacle. A circuit interrupting assembly is coupled to a fault detection circuit. The circuit interrupting assembly is configured to establish electrical continuity between the plurality of line ...

Power inductor with reduced DC current saturation

Patent Number: 8098123
Publication Date: 2012-01-17
Inventor: Sutardja, Sehat

A power inductor includes a first magnetic core having a first end and a second end, an inner surface and an outer surface, and an inner cavity defined by the inner surface. A slotted air gap in the first magnetic core extends from i) the first end to the second end and ii) from the inner surface to the outer surface. A second magnetic core is located inside the slotted air gap between opposing inner walls of the slotted air gap. The second magnetic core i) extends from the inner surface to ...

Magnetic attachment system with low cross correlation

Patent Number: 8098122
Publication Date: 2012-01-17
Inventors: Roberts, Mark; Richards, James Lee; Fullerton, Larry W.

A magnetic attachment system for attaching a first object to a second object. A first magnet structure is attached to the first object and a second magnet structure is attached to the second object by the magnetic attraction between the first magnet structure and second magnet structure. The magnet structures comprise magnetic elements arranged in accordance with patterns based on various codes. In various embodiments, the code has certain autocorrelation properties, the code may be from a ...

Method of switching a magnetic MEMS switch

Patent Number: 8098121
Publication Date: 2012-01-17
Inventors: Johnson, Peter; Hopper, Peter J; Niblock, Trevor; Vashchenko, Vladislav

A MEMS magnetic flux switch is fabricated as a ferromagnetic core. The core includes a center cantilever that is fabricated as a free beam that can oscillate at a resonant frequency that is determined by its mechanical and material properties. The center cantilever is moved by impulses applied by an associated motion oscillator, which can be magnetic or electric ...

Spring structure for MEMS device

Patent Number: 8098120
Publication Date: 2012-01-17
Inventors: Rijks, Theo; Van Beek, Jozef Thomas Martinus; Steeneken, Peter G.

A MEM device has a movable element (30), a pair of electrodes (e1, e2) to move the movable element, one electrode having an independently movable section (e3), resiliently coupled to the rest of the respective electrode to provide additional resistance to a pull in of the electrodes. This can enable a higher release voltage Vrel, and thus reduced risk of stiction. Also, a ratio of Vpi to Vrel can be reduced, and so a greater range of voltage is available for ...

Protection switch

Patent Number: 8098119
Publication Date: 2012-01-17
Inventors: Birner, Markus; Loos, Klaus

A protection switch includes a plurality of single-pole protection switch modules in a mechanically coherent unit forming a multi-pole protection switch configuration. Each module includes a housing, a switching arm, a moving contact on the switching arm pivotably movable against a fixed contact between closed and open positions, a manual operating mechanism for adjusting the switching arm between the closed and open positions and a tripping mechanism for automatically resetting the ...